Fish reproduction razia 2
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The document covers several topics related to reproduction, early life stages, and growth in aquatic organisms. It discusses hormones that regulate reproduction, methods for inducing spawning in captive species, early life stage development from fertilization to juvenile growth, and concepts of growth measurement and patterns. Measurement of growth includes length, weight, and body composition assessments to monitor health and predict harvest times.
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Hybridization in fishes
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The document discusses the introduction of exotic fish species in Indian aquaculture. It provides examples of exotic species introduced, such as common carp, bighead carp, tilapia, and white leg shrimp. While the introduction of exotic species provided some economic benefits, it also caused ecological impacts like competition with native species, loss of biodiversity, and transmission of diseases. Proper management of introductions is needed to balance benefits with minimizing risks to the environment.
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GROWTH AND DEVELOPMENT
Growth is defined as an irreversible increase in an organism's dry mass due to protein synthesis. It is closely linked with development, which refers to increasing complexity through tissue and organ differentiation. Growth can be measured in various ways and typically follows a sigmoid curve with lag, log/exponential, stationary, and decelerating phases. Both external factors like nutrients and internal factors like genes influence growth. Arthropods grow intermittently through molting and shedding of their exoskeleton. Insects undergo complete or incomplete metamorphosis from egg to larva/nymph to adult stages controlled by moulting and juvenile hormones.
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Livefeed culture, Priyanka Chatterjee
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Cat fish bio. & culture
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.
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Setting an aquarium is an important steps to maintaining healthy ornamental fishes. It gives mind relaxation and peaceful. It is a hobby and reduces the stress alsoInduced breeding
This document discusses induced breeding techniques in fish. It provides background on the historical development of induced breeding starting in the 1930s. The key steps discussed are collecting pituitary glands from ripe fish, preserving and storing the glands, determining appropriate doses of pituitary gland extract or synthetic hormones to inject into breeding fish, and collecting eggs and sperm. Factors that influence successful induced breeding include water conditions, climate, turbidity, and light levels.
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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.
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Cryopreservation, or freezing biological material at ultra-low temperatures, has several applications in fisheries and aquaculture. It allows for the wider distribution of gametes, reduces the number of broodfish needed, and facilitates selective breeding programs. The spermatozoa of many fish species can be cryopreserved due to their small size, large numbers, and simple membrane structure. Prior to freezing, spermatozoa are collected, tested for motility, diluted with an extender solution, and mixed with a cryoprotectant to minimize freeze damage. Samples are then cooled at a controlled rate, frozen in liquid nitrogen for storage, and later thawed at a controlled rate to test viability. While eggs and
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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.
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M. rosenbergii is the largest freshwater prawn in the world. It has a long rostrum with teeth and long legs with furry claws. The body has 20 segments with 14 in the head covered by a carapace. There are four life cycle phases: egg, larva, postlarva, and adult. Culture involves nursery pond management including stocking postlarvae and controlling water quality, and grow-out pond preparation with stocking seed and maintaining optimal temperature, dissolved oxygen, pH, and salinity levels.
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Eye Stalk Ablation in Crustaceans
This document discusses eye stalk ablation in crustaceans as a method to induce maturation for seed production. It provides background on the process, including that removal of the eyestalk reduces inhibitory hormones and allows maturation. Unilateral ablation is typically used, as bilateral ablation can cause stress and reabsorption of eggs. The effects, methods, timing, and process of ablation are described in detail. Maintaining appropriate conditions after ablation is also discussed to support maturation and spawning.
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This document provides an overview of the design and construction of finfish hatcheries. It discusses the importance of hatcheries in aquaculture for producing fish seed out of season and improving genetics. Key factors to consider in hatchery design include the budget, production targets, site selection, and facilities like water supply and treatment systems. The document outlines various components of a hatchery such as brood fish ponds, hatchery tanks, nursery ponds, and rearing ponds. It provides details on selecting appropriate pond sizes and layout. Finally, the conclusion emphasizes that careful hatchery operation and management is needed due to the sensitivity of fry and fingerlings.
Seed production of giant freshwater prawn fisheries ppt
Giant freshwater prawn seed production starts in Andaman - INDIA - A scientist and his team of the Division of Fisheries Science, Central Agricultural Research Institute (CARI), Port Blair, have initiated research on breeding and larval rearing of Giant Freshwater Prawn (M Rosenbergii) under controlled conditions at the CARI farm complex.
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So this is a visual PPT, made with reference book - Applied Fishery Science By S.M Shafi and most of the data was collected from FAO and CMFRI . Molluscan fisheries here in this PPT is related with India so most of the organisms are indigenous. Have a look . It would be pictorial but once you know about the topic it's the best
Trasportation of fish seed.
Fertilized fish eggs are known as Fish seeds. In simple words, they are the baby fishes used for seeding new Ponds in fisheries. Fish seed transportation is a process by which transfer of fish seed from the hatchery or place of collection to the rearing ponds.
Introduction to Catla catla
1) Catla catla, commonly known as catla, is a freshwater fish found predominantly in Asia, including India, Bangladesh, and Nepal. It is a fast-growing, planktivorous carp that feeds on zooplankton and algae.
2) Catla has prominent lips and thick lower jaws without barbels. It grows rapidly, reaching lengths of over 1 meter. It breeds during the monsoon season.
3) Catla is farmed using nursery, rearing, and stocking ponds with lime, organic and inorganic fertilizers added to enhance food production. It is supplemented with feeds including rice bran, fishmeal, and aquatic insects.
Introduction of exotic species in india
The document discusses the introduction of exotic fish species in Indian aquaculture. It provides examples of exotic species introduced, such as common carp, bighead carp, tilapia, and white leg shrimp. While the introduction of exotic species provided some economic benefits, it also caused ecological impacts like competition with native species, loss of biodiversity, and transmission of diseases. Proper management of introductions is needed to balance benefits with minimizing risks to the environment.
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This document is about Fish reproduction and the environment influence and endocrine cycle on fish reproduction, as well as mating systems
Fish reproduction razia
The document discusses general concepts in fish reproduction including reproductive strategies, environmental cues, stages of reproduction, and spawning methods. Reproductive strategies can be synchronous with one spawning leading to death, group synchronous with multiple seasonal spawnings, or asynchronous with daily spawning. The stages of reproduction include oocyte development, vitellogenesis, oocyte maturation, spawning, and recovery. Spawning can be simulated in the natural environment or through dry stripping and hormone induction methods.
Fish reproduction razia
The document discusses general concepts in fish reproduction including reproductive strategies, environmental cues, stages of reproduction, and spawning methods. Reproductive strategies can be synchronous with one spawning, group synchronous with multiple seasonal spawnings, or asynchronous with daily spawning. The stages of reproduction include oocyte development, vitellogenesis, oocyte maturation, spawning, and recovery. Spawning can be simulated in the natural environment or done via dry stripping or hormone induction.
Fish reproduction razia
The document discusses general concepts in fish reproduction including reproductive strategies, environmental cues, stages of reproduction, and spawning methods. Reproductive strategies can be synchronous with one spawning leading to death, group synchronous with multiple seasonal spawnings, or asynchronous with daily spawning. The stages of reproduction include oocyte development, vitellogenesis, oocyte maturation, spawning, and recovery. Spawning can be simulated in the natural environment or through dry stripping and hormone induction methods.
Fish reproduction razia
The document discusses general concepts in fish reproduction including reproductive strategies, environmental cues, stages of reproduction, and spawning methods. Reproductive strategies can be synchronous with one spawning, group synchronous with multiple seasonal spawnings, or asynchronous with daily spawning. The stages of reproduction include oocyte development, vitellogenesis, oocyte maturation, spawning, and recovery. Spawning can be simulated in the natural environment or done via dry stripping or hormone induction.
Fish reproduction razia
The document discusses general concepts in fish reproduction including reproductive strategies, environmental cues, stages of reproduction, and spawning methods. Reproductive strategies can maximize egg and fry survival and include synchronous, group synchronous, and asynchronous spawning. The stages of reproduction are oocyte development, vitellogenesis, oocyte maturation, spawning, and recovery. Spawning methods discussed are simulating the natural environment, dry stripping, and hormone induction.
Aquaculture basics module 3 growth
Growth in finfish can vary due to genetic and environmental factors. Uneven growth can cause issues for aquaculture operations. Key factors that affect growth include temperature, feed, stress, genetics, early maturation, and stocking density. Managing these factors through regular monitoring and corrective actions can optimize growth and production outcomes. Techniques like grading fish and adjusting feeding are used to promote even growth across populations.
Hormones and chemical
Hormones control many physiological processes through chemical signaling between cells and tissues. The endocrine system uses hormones to regulate water balance, ion levels, pH, growth, development, metabolism, temperature, and behaviors. Hormones include proteins, peptides, amino acids, and steroids that circulate in the bloodstream and elicit responses from target cells by binding to receptors and influencing gene expression, protein synthesis, and enzymatic reactions. Key hormones include insulin, glucagon, cortisol, thyroxine, antidiuretic hormone, prolactin, aldosterone, parathyroid hormone, and growth hormone which regulate processes like glucose levels, metabolism, development, and ion transport.
Physiology of growth and development
This document discusses the physiology of growth and development from conception through adulthood. It defines the key stages of development, describes common growth curves, and lists the major factors that influence growth, including genetics, nutrition, hormones, and the environment. In particular, it focuses on the roles of growth hormone, IGF-1, thyroid hormones, sex hormones, insulin, and cortisol in stimulating or inhibiting growth and development at different life stages.
Biological process that effect fish stock
1. The document discusses four key biological processes that affect fish stocks: reproduction, growth, recruitment, and mortality.
2. Reproduction can occur asexually through fission or cutting or sexually through the fertilization of eggs by sperm, which can happen externally or internally. Environmental factors, growth, age, food/nutrients, fish health, and availability of partners can influence reproduction.
3. Growth is affected by food availability and environmental factors like temperature. Manipulating these can control growth rates.
4. Recruitment involves young fish entering the population for the first time and can be manipulated through stocking programs and protecting nursery areas.
Biological process that effect fish stock
1. The document discusses four biological processes that affect fish stocks: reproduction, growth, recruitment, and mortality.
2. Reproduction can be asexual or sexual, with most fish undergoing external fertilization. Environmental factors, growth, age, food/nutrients, health, and availability of partners can impact reproduction. Manipulating river speeds/temperatures, adding fish ladders, and habitat complexity can help.
3. Growth increases fish size over time through tissue addition and is affected by food availability and environmental factors like temperature. Manipulations include adding fertilizer or protecting nursery areas.
4. Recruitment adds fish to stocks for the first time, and is manipulated through stocking programs and protecting nursery
Nutritional requirement of the living cells
This document summarizes key aspects of cell culture, including nutritional requirements, growth phases, metabolism, serum, topoinhibition, source substitutes, and pH regulation. Nutrients required for cell growth include amino acids, vitamins, ions, trace elements, and sugars. Cells progress through lag, exponential, and stationary growth phases. Cell metabolism includes catabolic and anabolic processes like glycolysis and the Krebs cycle that generate ATP. Serum provides proteins but can be derived from different animals. Topoinhibition inhibits overcrowded cell proliferation. Most cells grow at pH 7 but some prefer slightly more acidic or basic conditions. Source substitutes like iron salts can replace animal-derived components.
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Fish reproduction razia 2
- 3. Reproduction – general environmental regulation Reproduction, Early Life Stages, Growth brain gonad Fish pituitary steroid hormones Environment seasonal photoperiod profile seasonal temperature profile food availability contaminants other liver LH FSH • androgens • estrogens Vg gonadal development • progestins
- 4. Reproduction – hormones that control release of gametes Reproduction, Early Life Stages, Growth Brain Pit Gonad dopamine - LHRH + LH Gametes
- 7. Reproduction – captive induced spawning Reproduction, Early Life Stages, Growth MIH MIH R.W. Rottmann et al. 1991 LHRH = GnRH
- 8. Reproduction – captive induced spawning Reproduction, Early Life Stages, Growth R.W. Rottmann et al. 1991 MIH hCG = human chorionic gonadotropin