1. Introduction
2.Principal Game fishes
(a)Fresh water game fishes
(b) Estuarine and sea game fishes
3.Sport Fishing and Tourism
*Mahseer (Barbus Tor) fishing
*Trout fishing
*Sea fishing
THANK YOU!!
This document discusses estuaries and estuarine fisheries in India. It defines an estuary and notes that India has over 55 estuaries along its eastern and western coasts, totaling approximately 30,000 square kilometers. Several major river systems like the Ganges, Mahanadi, Godavari and Krishna form highly productive estuarine ecosystems. The document examines the fish production and ecology of estuaries like the Hooghly, Krishna, Godavari, Mahanadi, Chilka, Pulicat Lake, and Kerala backwaters. It provides details on fish catches, species diversity, and threats like overfishing in several of India's important estuarine systems.
This document provides information about carp culture and the selection of major carps for aquaculture. It discusses that carp culture is one of the oldest forms of aquaculture and major carps like Catla catla, Labeo rohita, and Cirrhina mrigala contribute over 85% of aquaculture production in India. The document outlines various factors to consider for site selection such as soil type, water availability, and proximity to markets. It also provides details on pond construction and conditioning, and criteria for selecting suitable carps for culture like growth rate, tolerance levels, and consumer preference.
- Grey mullet has been farmed for centuries in many countries using extensive and semi-intensive pond systems.
- It is an important aquaculture species in several countries and regions including Egypt, Russia, Korea, Taiwan, and India.
- Grey mullet is tolerant of a wide range of environmental conditions, grows quickly, and feeds on detritus, making it well-suited for aquaculture. However, juveniles can only tolerate wide salinity ranges once they reach 4-7 cm in length.
Hill areas offer good scope for the development- of fisheries—both for commercial and sport purposes.
The coldwater fishery resources in India comprise high and mid-altitude lakes, rivers, streams, their tributaries and reservoirs dammed across such rivers.
The importance of coldwater fisheries lies in their unique biodiversity, valuable germplasm and maintenance of environmental quality in hills.
Coldwater fishes breed naturally but since some species have been listed as endangered, therefore artificial breeding is now being practiced to restore the diversity.
This document provides information on lobster culture and its management. It discusses the important lobster species for culture, their habitat and feeding habits. It describes the breeding technology, seed collection methods, and hatchery and nursery management practices. Grow-out can be done using land-based tanks or sea cages. Key water quality parameters and stocking densities are outlined. Finally, common diseases affecting farmed lobsters are identified along with control measures.
This document discusses cold water fisheries in India. It describes the temperature range for cold water fisheries (5-25°C) and notes that states like Kashmir, Himachal Pradesh, and Uttarakhand are well-suited for cold water fisheries. It identifies important cold water fish species in India like various types of mahseer and trout. Mahseer can grow up to 1.5 meters long and breed from July to September. Trout generally feed on other fish and aquatic invertebrates. Cold water fisheries provide income, employment, and food for local populations and have significant potential to contribute to India's fisheries sector and economy.
Fish culture is classified based on the number of fish species as monoculture and polyculture. This is the culture of single species of fish in a pond or tank. The culture of trout, tilapia, catfish , carps are typical examples of monoculture.
This document discusses biosecurity in aquaculture. It defines biosecurity as measures adopted to secure a disease-free environment in all phases of aquaculture. It identifies different levels of biosecurity including external and internal barriers to prevent the spread of disease. Components of biosecurity include quarantine, sanitation, and disinfection. Recommended protocols for sanitation and disinfection include being careful with live foods, proper storage and usage of manufactured feeds, and good overall system cleanliness. The document also discusses biosecurity strategies for shrimp production specifically.
This document discusses estuaries and estuarine fisheries in India. It defines an estuary and notes that India has over 55 estuaries along its eastern and western coasts, totaling approximately 30,000 square kilometers. Several major river systems like the Ganges, Mahanadi, Godavari and Krishna form highly productive estuarine ecosystems. The document examines the fish production and ecology of estuaries like the Hooghly, Krishna, Godavari, Mahanadi, Chilka, Pulicat Lake, and Kerala backwaters. It provides details on fish catches, species diversity, and threats like overfishing in several of India's important estuarine systems.
This document provides information about carp culture and the selection of major carps for aquaculture. It discusses that carp culture is one of the oldest forms of aquaculture and major carps like Catla catla, Labeo rohita, and Cirrhina mrigala contribute over 85% of aquaculture production in India. The document outlines various factors to consider for site selection such as soil type, water availability, and proximity to markets. It also provides details on pond construction and conditioning, and criteria for selecting suitable carps for culture like growth rate, tolerance levels, and consumer preference.
- Grey mullet has been farmed for centuries in many countries using extensive and semi-intensive pond systems.
- It is an important aquaculture species in several countries and regions including Egypt, Russia, Korea, Taiwan, and India.
- Grey mullet is tolerant of a wide range of environmental conditions, grows quickly, and feeds on detritus, making it well-suited for aquaculture. However, juveniles can only tolerate wide salinity ranges once they reach 4-7 cm in length.
Hill areas offer good scope for the development- of fisheries—both for commercial and sport purposes.
The coldwater fishery resources in India comprise high and mid-altitude lakes, rivers, streams, their tributaries and reservoirs dammed across such rivers.
The importance of coldwater fisheries lies in their unique biodiversity, valuable germplasm and maintenance of environmental quality in hills.
Coldwater fishes breed naturally but since some species have been listed as endangered, therefore artificial breeding is now being practiced to restore the diversity.
This document provides information on lobster culture and its management. It discusses the important lobster species for culture, their habitat and feeding habits. It describes the breeding technology, seed collection methods, and hatchery and nursery management practices. Grow-out can be done using land-based tanks or sea cages. Key water quality parameters and stocking densities are outlined. Finally, common diseases affecting farmed lobsters are identified along with control measures.
This document discusses cold water fisheries in India. It describes the temperature range for cold water fisheries (5-25°C) and notes that states like Kashmir, Himachal Pradesh, and Uttarakhand are well-suited for cold water fisheries. It identifies important cold water fish species in India like various types of mahseer and trout. Mahseer can grow up to 1.5 meters long and breed from July to September. Trout generally feed on other fish and aquatic invertebrates. Cold water fisheries provide income, employment, and food for local populations and have significant potential to contribute to India's fisheries sector and economy.
Fish culture is classified based on the number of fish species as monoculture and polyculture. This is the culture of single species of fish in a pond or tank. The culture of trout, tilapia, catfish , carps are typical examples of monoculture.
This document discusses biosecurity in aquaculture. It defines biosecurity as measures adopted to secure a disease-free environment in all phases of aquaculture. It identifies different levels of biosecurity including external and internal barriers to prevent the spread of disease. Components of biosecurity include quarantine, sanitation, and disinfection. Recommended protocols for sanitation and disinfection include being careful with live foods, proper storage and usage of manufactured feeds, and good overall system cleanliness. The document also discusses biosecurity strategies for shrimp production specifically.
East Cost River System and Fisheries ppt.pptxAYNALALU
The document summarizes the key rivers of the east coast river system in India, including the Mahanadi, Godavari, Krishna, and Cauvery rivers. It discusses the length and catchment area of each river, as well as reservoirs, fish species, fisheries, and water quality parameters. Common fishing gears used in the rivers include drag nets, gill nets, hooks, and traps.
Shore based aquaculture or coastal brackish water aquaculture is practiced in many countries. There are various methods of traditional culture system based on the local conditions. Shrimp culture is the main attraction of this culture system. Some other fishes and other organisms like crabs, bivalves and seaweeds are also farmed. This type of culture system is mainly found in south East Asia.
Aquaculture is the farming of aquatic organisms such as fish, mollusks, crustaceans, and aquatic plants. It involves some form of intervention in the rearing process, such as regular stocking, feeding, and protection from predators. Farming implies individual or corporate ownership of the stock being cultivated. India has a long history of aquaculture and is now the second largest producer of aquaculture products globally. Aquaculture makes an important contribution to India's food supply and economy through diverse practices in freshwater, brackishwater, and marine environments.
This chapter provides a general introduction to finfish taxonomy. It discusses the importance of studying finfish taxonomy and defines key terms like taxonomy, taxa, classification, and systematics. It outlines the three stages of taxonomy - alpha, beta, and gamma taxonomy. Finally, it describes the principal tasks of taxonomists, which include identifying fish species, conducting taxonomic revisions, and studying evolutionary links between species. The document establishes the foundation for understanding the principles and practice of finfish taxonomy.
Exotic fish introduction to india and their impact on indigenous speciesAshish sahu
The exotic varieties of fish have been found to encroach the natural water bodies and adversely affect the indigenous fish species. ... Owing to extensive practice of composite culture, three fast growing exotic fishes are introduced along with the three Indian major carps.
The document discusses India's inland water resources including rivers, reservoirs, lakes, tanks, ponds, wetlands, lagoons and estuaries. It notes that rivers cover over 1.9 lakh km and reservoirs cover over 3.15 million hectares. Major river systems include the Ganga, Brahmaputra, Indus, and rivers along the east and west coasts. Inland fisheries production has increased from 0.75 million tonnes in 1950-51 to over 8 million tonnes in 2009-10. States like West Bengal, Andhra Pradesh and Uttar Pradesh are major producers.
Coracles are dominant fishing craft in South Indian reservoirs. They are made of a large, circular basket with low sides and a hide covering. Fishermen use gill nets, shore seines and longlines from coracles. Catamarans, made of 3-5 logs tied together, are used in pairs for boat seines and individually for longlines and cast nets. Common inland fishing gears include cast nets, gill nets, seines, lift nets, drag nets, hooks and lines, and traps. Trawlers have been tried experimentally in some Indian reservoirs.
Introduction of exotic fish & its impact on biodiversityPuspendu Samanta
This document discusses the introduction of exotic fish species around the world and their impacts. Some key points:
1) Exotic fish species have been introduced for various purposes like improving fisheries, aquaculture, and mosquito control. However, they can negatively impact native species through genetic changes, competition for resources, and spreading of diseases.
2) In India, many exotic trout and carp species from places like the UK, Sri Lanka, and Thailand have been introduced since the 1860s for experimental culture and stocking water bodies.
3) The impacts of exotic fish introductions include reduction of native populations and genes pools, hybridization leading to genetic pollution or species extinction, and alteration of aquatic ecosystems through pred
Viral diseases that commonly infect fishes include viral hemorrhagic septicemia (VHS), infectious pancreatic necrosis (IPN), spring viraemia of carp (SVC), channel catfish virus (CCV), and infectious hematopoietic necrosis. These viruses are transmitted between fishes through water and infected eggs. Diseased fishes show symptoms like hemorrhaging, skin discoloration, organ damage, and abnormal swimming behaviors. Diagnosis involves virus isolation, antibody tests, and PCR. There are no treatments, so prevention focuses on hygiene, quarantine, avoiding stress, and inactivating viruses in the environment.
This document discusses polyculture of carp fish in Bangladesh. It describes that polyculture involves culturing multiple fish species together that have different feeding habits and ecological niches. Common carp species cultured together in Bangladesh include various types of indigenous carp like rohu, mrigal carp, and exotic carp like silver carp. Effective polyculture management requires selecting compatible species, maintaining suitable water quality parameters, providing adequate natural and supplemental food, monitoring fish health and growth, and preventing diseases. Polyculture aims to maximize fish production from a water body by fully utilizing available resources.
This document discusses the traits and culture methods of important cultivable fish and shellfish in fresh water aquaculture. It covers carp species like Catla catla and Labeo rohita that are commonly farmed using methods like polyculture. Exotic carp species such as the silver carp are also discussed. Culture methods for catfish including Clarias batrachus are described. Finally, the giant freshwater prawn Macrobrachium rosenbergii is covered, noting its life cycle and that it can be cultured alone or with other species.
This document discusses the Indian oil sardine fishery. It provides details on the distribution, peculiar characteristics, feeding habits, habitat, reproduction, fecundity, spawning season, age and growth, size of capture, mode of harvest, utilization, maximum sustainable yield, IUCN status, current stock status, management measures, and production trends of the Indian oil sardine. Key points include that it is distributed along India's western coast from Gujarat to Kerala, feeds mostly on plankton, reaches sexual maturity at 1 year old and 150mm in length, and production peaked at over 720,000 tonnes in 2012. Mesh size regulation is used for management.
The document discusses global and Indian freshwater fish biodiversity. It notes that freshwater ecosystems account for only 1% of the Earth's surface but contain around 12,000 exclusively freshwater fish species. India is home to over 2,400 fish species, including 223 that are endemic. The major groups of freshwater fish found in India are carp, live fish, catfish, clupeids, mullets, featherbacks, loaches, eels, glassfish and gobies. Coldwater fish biodiversity includes species found in the Himalayas and Deccan plateau, while warm waters harbor over 500 species across various river systems.
1. Induced breeding is a technique where ripe fish are stimulated to breed in captivity using pituitary hormones or synthetic hormones.
2. The history of induced breeding began in the 1930s in Argentina and Brazil, and was first applied to Indian major carps like Cirrhinus mrigala in the late 1930s.
3. Induced breeding is needed because environmental conditions and hormone levels may be insufficient to trigger natural spawning in captive conditions.
Alimentary canal and feeding adaptations in fishes by nusritSYED ASSIM HAQ
The document discusses the alimentary canal and feeding adaptations in fishes, describing the different regions and structures of the canal from mouth to rectum and how they vary based on a fish's feeding habits, such as differences in teeth, gill rakers, stomach, and intestinal length between carnivorous, herbivorous, and omnivorous fish. It also covers the digestive glands and enzymes involved in digestion as well as various adaptations that have evolved in fishes' structures to suit their natural diets.
This document summarizes information about Indian major carps and their reproductive biology. It discusses that the three major carps - Catla, Rohu and Mrigal - attain sexual maturity in their second year. Males mature earlier than females. Spawning occurs during the monsoon season in river systems. Carp eggs consist of a yolk surrounded by membranes and a micropyle. Hatching and larval development are also described. Methods for seed collection, induced breeding and hatchery operations are provided.
This document provides an overview of reproductive biology in fishes. It discusses the different types of sexuality observed in fishes, including unisexuality, bisexuality, hermaphroditism, and parthenogenesis. It describes the reproductive cycles and hormones that regulate reproduction for both male and female fish. Key aspects covered include the gonads, sexual dimorphism, seasonal breeding patterns, and hormonal control of the reproductive system through the CNS-pituitary-gonad axis.
This document provides information on 11 species of catfish from 7 families. It discusses their classification, distribution, biology, culture practices, and production. Some of the main points covered include:
- Channel catfish, African sharptooth catfish, and river catfish are among the most commercially important species.
- Catfish are farmed using cages, ponds and pens. They grow quickly and can be raised at high densities, yielding 6-10 tons/ha/year.
- Major producers include Vietnam, China, USA, Nigeria, and Bangladesh. Vietnam is the world's largest producer of catfish, yielding over 1.1 million tons in 2010 for export.
Finfish breeding and hatchery management pdfKartik Mondal
Rivers were the major source of freshwater fish seed in India during 1950’s and 1960’s.
Over the years, the riverine contribution has declined and at present forms only a supplementary source, constituting less than 5% of the country’s total fish seed production.
The Ganga, the Brahmaputra and the Indus river systems in the North and the Peninsular East coast and the West coast river systems in the South are the important natural sources of fish seed.
Introduction of Fish and Fisheries of India.
• Freshwater Fish: Fish that spend most or all of their life in freshwaters, such as rivers and lakes, having a salinity of less than 0.5 ppt. Around 40% of all known species of
fish are found in freshwater.
They may be divided into Coldwater Fish (5-20 °C); examples: Mahseer, Trout, etc., and Warmwater Fish (25 35 °C); example: Carps, Catfish, Snakeheads, Featherbacks, etc.
• Brackishwater Fish: Fish that can tolerate a wide range of salinity (0.5 30.0 ppt)
and live in backwaters, estuaries and coastal waters.
Example: Mullet, Milkfish, Seabass, Pearlspot, Mudskipper, etc.
• Marine Fish: Fish that spend most or all of their life in seawater, such as Seas and
Oceans, having salinity above 30 ppt. There are about 240 species contributing to
the marine fisheries. Example: Sardines, Mackerel, Ribbonfish, Anchovies, Grouper, Cobia, Tuna, etc.
Indigenous fish species of Kashmir: Their importance, threats and conservation
Indigenous species are also called as native species. Indigenous species are found in a particular location and surrounding areas i.e., wide range of area. They are not restricted to a certain geographical area.
East Cost River System and Fisheries ppt.pptxAYNALALU
The document summarizes the key rivers of the east coast river system in India, including the Mahanadi, Godavari, Krishna, and Cauvery rivers. It discusses the length and catchment area of each river, as well as reservoirs, fish species, fisheries, and water quality parameters. Common fishing gears used in the rivers include drag nets, gill nets, hooks, and traps.
Shore based aquaculture or coastal brackish water aquaculture is practiced in many countries. There are various methods of traditional culture system based on the local conditions. Shrimp culture is the main attraction of this culture system. Some other fishes and other organisms like crabs, bivalves and seaweeds are also farmed. This type of culture system is mainly found in south East Asia.
Aquaculture is the farming of aquatic organisms such as fish, mollusks, crustaceans, and aquatic plants. It involves some form of intervention in the rearing process, such as regular stocking, feeding, and protection from predators. Farming implies individual or corporate ownership of the stock being cultivated. India has a long history of aquaculture and is now the second largest producer of aquaculture products globally. Aquaculture makes an important contribution to India's food supply and economy through diverse practices in freshwater, brackishwater, and marine environments.
This chapter provides a general introduction to finfish taxonomy. It discusses the importance of studying finfish taxonomy and defines key terms like taxonomy, taxa, classification, and systematics. It outlines the three stages of taxonomy - alpha, beta, and gamma taxonomy. Finally, it describes the principal tasks of taxonomists, which include identifying fish species, conducting taxonomic revisions, and studying evolutionary links between species. The document establishes the foundation for understanding the principles and practice of finfish taxonomy.
Exotic fish introduction to india and their impact on indigenous speciesAshish sahu
The exotic varieties of fish have been found to encroach the natural water bodies and adversely affect the indigenous fish species. ... Owing to extensive practice of composite culture, three fast growing exotic fishes are introduced along with the three Indian major carps.
The document discusses India's inland water resources including rivers, reservoirs, lakes, tanks, ponds, wetlands, lagoons and estuaries. It notes that rivers cover over 1.9 lakh km and reservoirs cover over 3.15 million hectares. Major river systems include the Ganga, Brahmaputra, Indus, and rivers along the east and west coasts. Inland fisheries production has increased from 0.75 million tonnes in 1950-51 to over 8 million tonnes in 2009-10. States like West Bengal, Andhra Pradesh and Uttar Pradesh are major producers.
Coracles are dominant fishing craft in South Indian reservoirs. They are made of a large, circular basket with low sides and a hide covering. Fishermen use gill nets, shore seines and longlines from coracles. Catamarans, made of 3-5 logs tied together, are used in pairs for boat seines and individually for longlines and cast nets. Common inland fishing gears include cast nets, gill nets, seines, lift nets, drag nets, hooks and lines, and traps. Trawlers have been tried experimentally in some Indian reservoirs.
Introduction of exotic fish & its impact on biodiversityPuspendu Samanta
This document discusses the introduction of exotic fish species around the world and their impacts. Some key points:
1) Exotic fish species have been introduced for various purposes like improving fisheries, aquaculture, and mosquito control. However, they can negatively impact native species through genetic changes, competition for resources, and spreading of diseases.
2) In India, many exotic trout and carp species from places like the UK, Sri Lanka, and Thailand have been introduced since the 1860s for experimental culture and stocking water bodies.
3) The impacts of exotic fish introductions include reduction of native populations and genes pools, hybridization leading to genetic pollution or species extinction, and alteration of aquatic ecosystems through pred
Viral diseases that commonly infect fishes include viral hemorrhagic septicemia (VHS), infectious pancreatic necrosis (IPN), spring viraemia of carp (SVC), channel catfish virus (CCV), and infectious hematopoietic necrosis. These viruses are transmitted between fishes through water and infected eggs. Diseased fishes show symptoms like hemorrhaging, skin discoloration, organ damage, and abnormal swimming behaviors. Diagnosis involves virus isolation, antibody tests, and PCR. There are no treatments, so prevention focuses on hygiene, quarantine, avoiding stress, and inactivating viruses in the environment.
This document discusses polyculture of carp fish in Bangladesh. It describes that polyculture involves culturing multiple fish species together that have different feeding habits and ecological niches. Common carp species cultured together in Bangladesh include various types of indigenous carp like rohu, mrigal carp, and exotic carp like silver carp. Effective polyculture management requires selecting compatible species, maintaining suitable water quality parameters, providing adequate natural and supplemental food, monitoring fish health and growth, and preventing diseases. Polyculture aims to maximize fish production from a water body by fully utilizing available resources.
This document discusses the traits and culture methods of important cultivable fish and shellfish in fresh water aquaculture. It covers carp species like Catla catla and Labeo rohita that are commonly farmed using methods like polyculture. Exotic carp species such as the silver carp are also discussed. Culture methods for catfish including Clarias batrachus are described. Finally, the giant freshwater prawn Macrobrachium rosenbergii is covered, noting its life cycle and that it can be cultured alone or with other species.
This document discusses the Indian oil sardine fishery. It provides details on the distribution, peculiar characteristics, feeding habits, habitat, reproduction, fecundity, spawning season, age and growth, size of capture, mode of harvest, utilization, maximum sustainable yield, IUCN status, current stock status, management measures, and production trends of the Indian oil sardine. Key points include that it is distributed along India's western coast from Gujarat to Kerala, feeds mostly on plankton, reaches sexual maturity at 1 year old and 150mm in length, and production peaked at over 720,000 tonnes in 2012. Mesh size regulation is used for management.
The document discusses global and Indian freshwater fish biodiversity. It notes that freshwater ecosystems account for only 1% of the Earth's surface but contain around 12,000 exclusively freshwater fish species. India is home to over 2,400 fish species, including 223 that are endemic. The major groups of freshwater fish found in India are carp, live fish, catfish, clupeids, mullets, featherbacks, loaches, eels, glassfish and gobies. Coldwater fish biodiversity includes species found in the Himalayas and Deccan plateau, while warm waters harbor over 500 species across various river systems.
1. Induced breeding is a technique where ripe fish are stimulated to breed in captivity using pituitary hormones or synthetic hormones.
2. The history of induced breeding began in the 1930s in Argentina and Brazil, and was first applied to Indian major carps like Cirrhinus mrigala in the late 1930s.
3. Induced breeding is needed because environmental conditions and hormone levels may be insufficient to trigger natural spawning in captive conditions.
Alimentary canal and feeding adaptations in fishes by nusritSYED ASSIM HAQ
The document discusses the alimentary canal and feeding adaptations in fishes, describing the different regions and structures of the canal from mouth to rectum and how they vary based on a fish's feeding habits, such as differences in teeth, gill rakers, stomach, and intestinal length between carnivorous, herbivorous, and omnivorous fish. It also covers the digestive glands and enzymes involved in digestion as well as various adaptations that have evolved in fishes' structures to suit their natural diets.
This document summarizes information about Indian major carps and their reproductive biology. It discusses that the three major carps - Catla, Rohu and Mrigal - attain sexual maturity in their second year. Males mature earlier than females. Spawning occurs during the monsoon season in river systems. Carp eggs consist of a yolk surrounded by membranes and a micropyle. Hatching and larval development are also described. Methods for seed collection, induced breeding and hatchery operations are provided.
This document provides an overview of reproductive biology in fishes. It discusses the different types of sexuality observed in fishes, including unisexuality, bisexuality, hermaphroditism, and parthenogenesis. It describes the reproductive cycles and hormones that regulate reproduction for both male and female fish. Key aspects covered include the gonads, sexual dimorphism, seasonal breeding patterns, and hormonal control of the reproductive system through the CNS-pituitary-gonad axis.
This document provides information on 11 species of catfish from 7 families. It discusses their classification, distribution, biology, culture practices, and production. Some of the main points covered include:
- Channel catfish, African sharptooth catfish, and river catfish are among the most commercially important species.
- Catfish are farmed using cages, ponds and pens. They grow quickly and can be raised at high densities, yielding 6-10 tons/ha/year.
- Major producers include Vietnam, China, USA, Nigeria, and Bangladesh. Vietnam is the world's largest producer of catfish, yielding over 1.1 million tons in 2010 for export.
Finfish breeding and hatchery management pdfKartik Mondal
Rivers were the major source of freshwater fish seed in India during 1950’s and 1960’s.
Over the years, the riverine contribution has declined and at present forms only a supplementary source, constituting less than 5% of the country’s total fish seed production.
The Ganga, the Brahmaputra and the Indus river systems in the North and the Peninsular East coast and the West coast river systems in the South are the important natural sources of fish seed.
Introduction of Fish and Fisheries of India.
• Freshwater Fish: Fish that spend most or all of their life in freshwaters, such as rivers and lakes, having a salinity of less than 0.5 ppt. Around 40% of all known species of
fish are found in freshwater.
They may be divided into Coldwater Fish (5-20 °C); examples: Mahseer, Trout, etc., and Warmwater Fish (25 35 °C); example: Carps, Catfish, Snakeheads, Featherbacks, etc.
• Brackishwater Fish: Fish that can tolerate a wide range of salinity (0.5 30.0 ppt)
and live in backwaters, estuaries and coastal waters.
Example: Mullet, Milkfish, Seabass, Pearlspot, Mudskipper, etc.
• Marine Fish: Fish that spend most or all of their life in seawater, such as Seas and
Oceans, having salinity above 30 ppt. There are about 240 species contributing to
the marine fisheries. Example: Sardines, Mackerel, Ribbonfish, Anchovies, Grouper, Cobia, Tuna, etc.
Indigenous fish species of Kashmir: Their importance, threats and conservation
Indigenous species are also called as native species. Indigenous species are found in a particular location and surrounding areas i.e., wide range of area. They are not restricted to a certain geographical area.
Hey everyone this article here is my research work which I did during my first year of university, which captures the work and impact of trawl fishing in mahanadi and its estuaries. hope you like it :)
This document discusses the coldwater fishes of Kashmir. It provides background on the historical introduction of trout to Kashmir in 1900 from Scotland. It describes the major coldwater fish species found in Kashmir, including both exotic species like trout and indigenous species like the Schizothorax. It outlines some of the key trout rearing centers in Kashmir. Finally, it discusses the importance of coldwater fisheries for Kashmir's economy and livelihoods, and the need for sustainable development of these resources.
This document summarizes information about fish farming in India, including different species of fish that are farmed. It discusses indigenous fish species like various carps, as well as exotic species imported from other countries. For each type of fish, it provides details on physical characteristics, habitat, breeding, and use in aquaculture. The document categorizes fish into groups like indigenous carps, exotic carps, air-breathing fishes, and ornamental fishes. It provides information on commercially important species like various carps, catfish, climbing perch, and tilapia.
FISH SEED PRODUCTION & CULTIVABLE FISH SPECIES WITH FISH CUM DUCK FORMINGMathankumar S
This document summarizes information about fish farming in India, including different species of fish that are farmed. It discusses indigenous fish species like various carps, as well as exotic species imported from other countries. For each type of fish, it provides details on physical characteristics, habitat, breeding, and use in aquaculture. The document categorizes fish into groups like indigenous carps, exotic carps, air-breathing fishes, and ornamental fishes. It provides information on commercially important species like various carps, catfish, climbing perch, and tilapia.
What is biodiversity?
Father of biodiversity- E.O. Wilson.
The term ‘biodiversity’’ encompasses the variety of all life forms on earth.
Define biodiversity –
‘’ Biodiversity include of the particular area may be living organisms (plant and animal) called biodiversity ’’.
• Simple words in can be defined as the biodiversity .
“Variety, variability b/w genes, spp. and ecosystem”.
Define fish diversity –
“Fish Species diversity is defined as the number of species and abundance of each species that live in a particular location”.
The number of species that live in a particular location is called species richness.
India is one of the 17 mega biodiversity countries having four biodiversity hotspots namely the Western Ghats, eastern Himalayas, Indo-Burma and Sundaland that are included amongst the top ten most important hotspots in the world.
It also has rich freshwater(rivers, irrigationcanals,tanks, lakes,reservoirs) fish diversity.
Which living organisms–
All living organism in world 7.4 billion.
Fish Biodiversity in world-
World harbour total of 33059 spp. 4258 genera, 482 families about 58 % Marine water, 41% Fresh water and 1% migrants.
2-Fisheries resource of India –
India blessed with huge aquatic resources with 29,000 km of rivers, 0.3 million ha of estuaries, 0.9 million ha of back waters and lagoons, 3.15 million ha of reservoirs, 0.2 million ha of floodplain wetlands, 0.72 million ha of upland lakes and 2.02 million km sq area of Exclusive Economic Zone (EEZ) surrounding the seas,8129 km of coast line, which includes those of Andaman and Nicobar and Lakshadweep Islands.
The seas surrounding the country, 14 major rivers, 44 medium rivers and innumerable small rivers and other inland water bodies provide one of the richest faunastic resources of the world.
Fish Culture or fish farming involves raising fish commercially in tanks or enclosures, usually for food. It is the principal form of aquaculture, while other methods may fall under mariculture. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. Worldwide, the most important fish species used in fish farming are carp, tilapia, salmon, and catfish.
lobsters and crab fisheries in INDIA is a vast and enormous amount of catch and exports are being made.
this slide describes about the methods, distribution, annual landings and important species of lobster and crabs in India.
THE FLOOD PLAIN WETLAND AND COLD-WATER FISHERIES OF-2 (1).pptxSUVADIPGHARA1
This document discusses floodplain wetlands and cold-water fisheries in India. It defines floodplain wetlands as areas of land in river valleys that periodically flood. India has over 67,000 wetlands covering 4.1 million hectares that support important fisheries. Wetlands can be classified based on morphology, water retention, depth, and river connection. They support over 85 fish species. Management approaches for wetlands include capture fisheries, culture-based fisheries, and integrated systems. Cold-water fisheries include important species like several Mahseer varieties and trout. They are managed through capture fisheries in lakes and streams and culture-based systems in ponds and tanks. Fish-based tourism is also discussed.
it is a presentation which talks about 6 marine animals and 4 aquatic plants which are found to live in the Atlantic ocean.
it is a colorful presentation with lots of images to substantiate the information given aside.
A short description about magur fish.The walking catfish (Clarias batrachus) is a species of freshwater airbreathing catfish native to Southeast Asia, but also introduced outside its native range where it is considered an invasive species. It is named for its ability to "walk" across dry land, to find food or suitable environments. While it does not truly walk as most bipeds or quadrupeds do, it has the ability to use its pectoral fins to keep it upright as it makes a wiggling motion with snakelike movements.[2] This fish normally lives in slow-moving and often stagnant waters in ponds, swamps, streams and rivers, flooded rice paddies or temporary pools which may dry up
Major Fresh water and Marine Ornamental fishes and Potential for Domestic far...B. BHASKAR
Important fresh water and marine water ornamental aquarium fishes, average economics on setting up of ornamental fish hatchery, proposed unit cost for ornamental fish farming, export potential for Ornamental fish trade
Golden Masheer (Tor putitora): Pakistan’s National Fishmeemail377
The golden mahseer (Tor putitora) is a large and striking freshwater fish species known for its golden scales and impressive size. Native to rivers and freshwater systems in South Asia and Southeast Asia, it is particularly abundant in the Himalayan region, including rivers in Pakistan, India, Nepal, and Bhutan. This species is highly valued by anglers for its strength and fighting ability, making it a popular target for sport fishing. However, overfishing and habitat destruction have led to population declines in many areas, prompting conservation efforts to protect this iconic species. The golden mahseer is an important cultural and ecological symbol in the region, playing a significant role in local ecosystems and traditional fishing practices.
Freshwater, Brackish water and Marine fish culture of India by Dr. S. G. ChebbiSameer Chebbi
This document summarizes the history and current state of freshwater fish culture in India. It discusses how fish culture has ancient roots in India dating back thousands of years, but was traditionally small-scale. Technological advances like induced breeding in the 1950s revolutionized the industry. Carp culture is now a major economic activity, with scientific methods producing high yields. Different culture systems are used across regions depending on local conditions and resources. Freshwater fish culture continues to be an important and growing industry in India.
Riverine fisheries play an important role in India by providing food, income, and livelihoods to many people. They also contribute to biodiversity and cultural heritage. Major river systems in India include the Ganges, Brahmaputra, Indus, east coast rivers, and peninsular rivers. These rivers support diverse fish species and aquatic ecosystems. However, overfishing, habitat degradation, and pollution threaten riverine fisheries. Conservation efforts and partnerships aim to promote sustainable management. If best practices are adopted, riverine fisheries have potential for sustainable development and socioeconomic benefits in the future.
Biology of selected endangered species of fishesRajeshJayswal
The document summarizes information on 6 endangered species of fish:
1. Whale shark - largest fish, filter feeds, threatened by fishing for its meat, oil and fins.
2. Ganges shark - found in Indian rivers, threatened by overfishing, habitat loss, and pollution.
3. Bigeye tuna - circumglobal distribution, threatened by overfishing managed by regional commissions.
4. Giant grouper - largest reef fish, threatened by fishing and trade despite laws in some areas.
5. European eel - critically endangered, numbers have declined 90% due to overfishing, barriers, and parasites.
6. Atlantic halibut - largest flatfish, lives in
Seafood is any form of sea life regarded as food by humans, prominently including fish and shellfish. Shellfish include various species of molluscs, crustaceans, and echinoderms.
Pisciculture is the method of culturing and rearing fish and shellfish. It provides employment and a source of protein. Common fish used in pisciculture in India include various carp species, grey mullets, tilapia, and shrimp. Pisciculture is carried out in various water bodies like ponds, reservoirs, and paddy fields. It helps utilize water resources and areas like paddy fields for fish production. There is increasing global demand for fish, so pisciculture helps augment food supply.
This document provides information on the types of culturable freshwater fishes found in India. It discusses the major categories including major carps, minor carps, murrels, catfishes, exotic fishes, and cold water fishes. Within each category, it describes 3-4 specific fish species, providing details on their physical characteristics, habitat, feeding behavior, and role in aquaculture. The document aims to outline the various freshwater fish that are commonly cultured in India for food production and economic purposes.
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
BREEDING METHODS FOR DISEASE RESISTANCE.pptxRASHMI M G
Plant breeding for disease resistance is a strategy to reduce crop losses caused by disease. Plants have an innate immune system that allows them to recognize pathogens and provide resistance. However, breeding for long-lasting resistance often involves combining multiple resistance genes
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptxRASHMI M G
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...Travis Hills MN
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxMAGOTI ERNEST
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
2. Sport Fisheries
Sport fishing is a source of recreation to millions of people from India and
abroad and it deserves the status of family recreation.
The recreation is an important element of enjoyment and satisfaction derived
from the sport fishing.
Most of the well known food fishes are also some of the best known game
fishes.
The true definition of a game fish or a sport fish is that any fish caught or
angled on rod and line putting up some fight and not thrown back in disgust by
the angler or sports man.
Apart from this, the classifications of fish deal with small and big game fisher
generally weighing over 50 Kgs.
Trout’s, snow trout’s and Mahaseers, goonch etc. placed under big game fish
category. In addition, there are different kinds of methods within the sport
fishing or angling.
3. Principal Game fishes
The sporting fish includes Mahaseers, trouts and large catfishes etc.
The game fish inhabits both fresh and soft waters include small and
large species.
The brief description of each of the principal game fishes of India
exhibits its natural habitat in detailed.
Various characters used to distinguish each species from one another
include body shape, nature and characteristics of fins, morph metric
measurements and natural coloration.
Based on their occurrence and ecosystem, the game fishes classified
into two groups, such as
(a) Fresh water game fishes
(b) Estuarine and sea game fishes.
4. • The fresh water game fishes listed as follows, Notopterus chitala,
Chela argentea, Raimas bola, Tor Chillinoides, Tor putitora, Tor tor,
T. khudree, Acrossocheilus hexagonolepis, Schizothoraichthys
esocinus, Schizothorax planifrons, Catta catla, Labeo calbasu,
Labeo rohita, Cirrhinus mrigala, Wallago attu, Clupisoma garua,
Silonia silondia, Pangasius pangasius, Eutropiichthys vcha, Mystus
seenghala, Bagarius bagarius, Channa striatus, Channa marulius,
Anguilla bengalensis and Mastacembelus armatus etc.
• Eustuarine and Sea game fishes have the following species,
Megalops cyprinoides Lates calcarifer, Eleutheronema
tetradactylus, Lutjanus argentimaculata, Scomberomorus
commersoni, S. guttatus, Sparus berda and Sparus datnia etc.
5. Sport Fishing and Tourism
• India, one of the many countries of the world, earns considerable foreign
exchange through tourism including fishing.
• Among the carps of the India, several of which give (Mahaseer, trout etc.)
good sport. It is a source of recreation of millions of tourists.
• Angling has already become a source of family recreation of people of all
ages, and social economic strata of the society in different countries.
• Besides the other elements of importance in sport fishing is natural
environment, water quality, natural beauty, privacy etc. increasing numbers
of people to go fishing.
• Apart from this holding of community activity like seminars, fishing
competition and educational camps, encouraging people involved in
conservation methods by granting awards for successful performance, and
promoting national and international tourism through sport fishing.
6. Some good places where you can go for sport fishing--
• Himachal Pradesh -. Kulu, Manali
• Uttar Pradesh - Dodital Lake nestled among the snow-clad peaks in the
Uttarkashi Himalayas is a fresh water lake and a tempting trout pool, where
you can get a good catch, during all seasons.
• South India - The best season to go trout-fishing in the south of India is
from April to September. Accommodation is available at the forests
bungalows.
• Kashmir- with its network of rivers, streams and high altitude lakes. The
best time for fishing here are early mornings and late evenings.
Mahseer (Barbus Tor) fishing:-
The Barbus Tor, popularly called the Mahseer or the Tiger of the Indian
Rivers, is one of the largest freshwater fish and one of the greatest fighting
fish in the world.
It is natural to Indian lakes and streams and can attain sizes upto 5.5 ft and
weigh over 50 kgs.
Mahseer is generally found in the rivers of the Terai regions of the
Himalayas, the Shivalik Hills in the north, and the river Kaveri in the south,
where it has been fished for successfully with rod and line.
7. The Mahseer is found where the river speeds through narrow gorges and
spills out over a rocky river bed. The larger fish are found above large rapids
and in the pools below the falls.
Trout fishing:-
Unlike the Mahseer, the Trout is not indigenous to Indian waters. The Snow
Trout is however fond in all high altitude streams and lakes.
It was introduced into various predetermined lakes and river in various
parts of the country. Trout hatcheries are in operatron in the Kashmir valley,
Kulu valley.
Agoda near Uttrakashi and Avalanche in the Nilgiris. The Snow Trout is
however, touch in all high altitude streams and lakes.
Sea fishing:-
Sea fishing as a sport has not bet been well developed in India.
But there is a good variety of game fish off the coasts of India like
Baracuda, Mullet, Perch, Tuna, Marlin, Blue Marlin, Sail Fish and Sear.
So the enterprising angler can put together a rewarding and memorable trip
in some very exotic regions of India.