The document discusses fish diseases and health management. It defines disease and lists common clinical signs seen in diseased fish, such as irregular swimming, rubbing against surfaces, and loss of appetite. It then covers the major categories of fish diseases: bacterial (like tail/fin rot), fungal (like saprolegniasis), parasitic (protozoan like ichthyophthiriasis, helminth, and crustacean parasites), and nutritional deficiencies. Environmental factors and the relationship between host, pathogen, and environment in disease development are also examined. The document provides details on symptoms and recommended treatment for several specific diseases.
Introduction
Fish Health Management GOALS
Principles of fish health management
Factors affecting fish health
Common symptoms of diseases
General preventive measures
Proper Health Management through manipulating the disease triangle
Conclusion
References
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.
Many farmers have been unable to successfully breed African Catfish.Several attempts made have given unfruitful results. In this guide, Lanre Ogunsina lists his own simple 19 proven steps to efficiently breed the African Catfish.
Due to the difficulties of getting consistent, fast growing, disease resistant and uniform sized catfish fingerlings and juveniles, the African Catfish Hatchery came into existence.
In the African Catfish Hatchery, catfish fry ‘come out’ from eggs under an artificial condition in commercial numbers. These fry grow into fingerlings and they later become juveniles.
Introduction
Fish Health Management GOALS
Principles of fish health management
Factors affecting fish health
Common symptoms of diseases
General preventive measures
Proper Health Management through manipulating the disease triangle
Conclusion
References
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.
Many farmers have been unable to successfully breed African Catfish.Several attempts made have given unfruitful results. In this guide, Lanre Ogunsina lists his own simple 19 proven steps to efficiently breed the African Catfish.
Due to the difficulties of getting consistent, fast growing, disease resistant and uniform sized catfish fingerlings and juveniles, the African Catfish Hatchery came into existence.
In the African Catfish Hatchery, catfish fry ‘come out’ from eggs under an artificial condition in commercial numbers. These fry grow into fingerlings and they later become juveniles.
Nutritional requirement of cultivable fin fish: larvae, juveniles and adultsDebiprasad1997
Fish is among the healthiest foods on the planet. It is loaded with important nutrients, such as protein and vitamin D. Fish is also the world's best source of omega-3 fatty acids, which are incredibly important for human body and brain.
Manufactured feeds are an important part of modern commercial aquaculture, providing the balanced nutrition needed by farmed fish.
In the development of modern aquaculture, starting in the 1970s, fishmeal and fish oil were key components of the feeds for these species. They are combined with other ingredients such as vegetable proteins, cereal grains, vitamins and minerals and formed into feed pellets.
The global supply of fish meal and fish oil is finite and fully utilized. Alternative or nontraditional feedstuffs may differ in terms of taste, smell, texture, and color, as well as nutrient composition, from the traditional feedstuffs, which are produced largely from the natural prey of the fish being raised. Alternative feedstuffs may also contain compounds and antinutritional factors that affect digestive or sensory physiology.
Another important area of fish nutrition for the next 20 years will be larval fish nutrition. Currently, the cost and difficulty of rearing a great number of species from the first feeding to the juvenile stage are the most severe bottlenecks to the development of aquaculture production of nontraditional species.
Broodstock And Hatchery Management Of Penaeus Monodonsush_p
Shrimp aquaculture is an important and valuable production sector that has been growing rapidly over the past two decades. Success is largely based on the quality of post larvae, particularly their health condition, thus making hatchery production of quality post larvae crucial to the sector’s sustainability. Vietnam is the leading producer of black tiger shrimp in the world with a production of 300,000 tons in 2011, followed by India and Indonesia with a production of 187,900 tons and 126,200 tons respectively.
Major contribution of the tiger shrimp to global shrimp production and the economic losses resulting from disease outbreaks, it is essential that the shrimp-farming sector invest in good management practices for the production of healthy and quality seed. The Indian shrimp hatchery industry has established a detailed guidance and protocols for improving the productivity, health management, biosecurity and sustainability of the sector. Following a brief review of shrimp hatchery development in India, the major requirements for hatchery production are discussed under the headings: infrastructure, facility maintenance, inlet water quality and treatment, wastewater treatment, biosecurity, standard operating procedures (SOPS), the Hazard Analysis Critical Control Point (HACCP) approach, chemical use during the hatchery production process and health assessment. Pre-spawning procedures include the use of wild, domesticated and specific pathogen free/ specific pathogen resistant (SPF/SPR) broodstock, broodstock selection and holding techniques, transport, utilization, health screening, maturation, nutrition and spawning, egg hatching; nauplius selection, egg/ nauplius disinfection and washing and holding, disease testing and transportation of nauplii. Post-spawning procedures include: larval-rearing unit preparation, larval rearing/health management, larval nutrition and feed management, important larval diseases, quality testing/selection of PL for stocking, PL harvest and transportation, nursery rearing and record keeping.
There are many diseases of fish which can be troublesome to commercial producers as well as the recreational pond owner. Many disease outbreaks of captive fish stocks are associated with stressful conditions such as poor water quality, excessive crowding or inadequate nutrition.
Life cycle of Protozoan parasite
fish parasite
parasitologyClinostomum compalanatum and Clinostomum marginatum are unsegmented flatworms of the class Trematoda and the order Digenea.
They are also called as yellow grub
They occur frequently in the skin and the muscle of the freshwater fish.
Small cream coloured nodules or cysts ranging from pinhead size up to 2.5 mm depending on their age
The number of cysts may vary from 1-100 or more than
They have an oval or round shape.
The skin of the fish in reaction to the infection produces the cysts, which contain worms.
It may take 3 weeks to make clearly visible cysts after the infection and 7 weeks to reach full size
Nutritional requirement of cultivable fin fish: larvae, juveniles and adultsDebiprasad1997
Fish is among the healthiest foods on the planet. It is loaded with important nutrients, such as protein and vitamin D. Fish is also the world's best source of omega-3 fatty acids, which are incredibly important for human body and brain.
Manufactured feeds are an important part of modern commercial aquaculture, providing the balanced nutrition needed by farmed fish.
In the development of modern aquaculture, starting in the 1970s, fishmeal and fish oil were key components of the feeds for these species. They are combined with other ingredients such as vegetable proteins, cereal grains, vitamins and minerals and formed into feed pellets.
The global supply of fish meal and fish oil is finite and fully utilized. Alternative or nontraditional feedstuffs may differ in terms of taste, smell, texture, and color, as well as nutrient composition, from the traditional feedstuffs, which are produced largely from the natural prey of the fish being raised. Alternative feedstuffs may also contain compounds and antinutritional factors that affect digestive or sensory physiology.
Another important area of fish nutrition for the next 20 years will be larval fish nutrition. Currently, the cost and difficulty of rearing a great number of species from the first feeding to the juvenile stage are the most severe bottlenecks to the development of aquaculture production of nontraditional species.
Broodstock And Hatchery Management Of Penaeus Monodonsush_p
Shrimp aquaculture is an important and valuable production sector that has been growing rapidly over the past two decades. Success is largely based on the quality of post larvae, particularly their health condition, thus making hatchery production of quality post larvae crucial to the sector’s sustainability. Vietnam is the leading producer of black tiger shrimp in the world with a production of 300,000 tons in 2011, followed by India and Indonesia with a production of 187,900 tons and 126,200 tons respectively.
Major contribution of the tiger shrimp to global shrimp production and the economic losses resulting from disease outbreaks, it is essential that the shrimp-farming sector invest in good management practices for the production of healthy and quality seed. The Indian shrimp hatchery industry has established a detailed guidance and protocols for improving the productivity, health management, biosecurity and sustainability of the sector. Following a brief review of shrimp hatchery development in India, the major requirements for hatchery production are discussed under the headings: infrastructure, facility maintenance, inlet water quality and treatment, wastewater treatment, biosecurity, standard operating procedures (SOPS), the Hazard Analysis Critical Control Point (HACCP) approach, chemical use during the hatchery production process and health assessment. Pre-spawning procedures include the use of wild, domesticated and specific pathogen free/ specific pathogen resistant (SPF/SPR) broodstock, broodstock selection and holding techniques, transport, utilization, health screening, maturation, nutrition and spawning, egg hatching; nauplius selection, egg/ nauplius disinfection and washing and holding, disease testing and transportation of nauplii. Post-spawning procedures include: larval-rearing unit preparation, larval rearing/health management, larval nutrition and feed management, important larval diseases, quality testing/selection of PL for stocking, PL harvest and transportation, nursery rearing and record keeping.
There are many diseases of fish which can be troublesome to commercial producers as well as the recreational pond owner. Many disease outbreaks of captive fish stocks are associated with stressful conditions such as poor water quality, excessive crowding or inadequate nutrition.
Life cycle of Protozoan parasite
fish parasite
parasitologyClinostomum compalanatum and Clinostomum marginatum are unsegmented flatworms of the class Trematoda and the order Digenea.
They are also called as yellow grub
They occur frequently in the skin and the muscle of the freshwater fish.
Small cream coloured nodules or cysts ranging from pinhead size up to 2.5 mm depending on their age
The number of cysts may vary from 1-100 or more than
They have an oval or round shape.
The skin of the fish in reaction to the infection produces the cysts, which contain worms.
It may take 3 weeks to make clearly visible cysts after the infection and 7 weeks to reach full size
Fish Parasitological Studies of Thakurgaon, Bangladesh and Their Impact on Fi...Md. Atick Chowdhury
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What is bacteria?
Bacteria shape
Types of bacteria
Difference between gram-positive and gram-negative bacteria
Common symptom
Causes
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Furunculosis
Columnaris
Dropsy
Vibriosis
Tuberculosis
Bacterial gill diseases
Fin rot / tail rot
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Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Model Attribute Check Company Auto PropertyCeline George
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2. What is Disease?
Definition: any alteration of the body or one
of its organs so as to disturb normal
physiological function
opposite of health = unhealthy or dysfunctional
3. Disease free healthy fish shows the following characters:
Clean body
Erect fins
Bright body colour
Bright eyed
Faster movement
Skin and fins intact conditions
Common clinical signs shows by a fish affected with disease:
Irregular swimming movement
Jumping of the fish
Rubbing the body against rough substrate
Surfacing on water
Refusal of feed
Excessive mucus secretion
Abdominal swelling
Cyst formation
Fin erosion
Body deformities
Gasping air
4. Fish organs affected with disease:
External part- i.e. scale
Mouth and anus
Nostril
Eyes
Gills
Internal organs- digestive tract, liver, kidney, gonad,
etc.
6. Factors affecting on the Health of Fish
Fluctuating Water & Soil Parameters
Quality Fish Seed
Quality Feed & Nutritionally Balanced Diet
7. Loss of
natural Colour
Fins and
Tail Necrotic
Wounds
on the Body
Breaths
with Mouth
Loss of
Stability &
Homeostasis
Fish Comes to
Surface & Swims
slowly very often
Eyes Enlarged
and
Exophthalmic
Gills loose natural
Red colour –Pale in
Colour or Necrotic
Heavy
Mucous on the
Body & Gills
Edging
Loss of
Appetite
Distended
Abdomen – Colon
filled with Fluid
8. COMMON TYPE OF DISEASES IN FRESHWATER FISH
Parasitic Diseases
Fungal Diseases
Bacterial Diseases
Nutritional Deficiency Problems
Environmental Related Problems
Crustacean Parasite
Helminth Parasite
Protozoan Parasites
EUS
10. Tail Rot & Fin Rot
Causative agent: Pseudomonas sp, Aeromonas sp
• Tail & Fins Necrotic
• Fish become ugly due to total necrosis of fins & tail
• Muscles exposed
Symptoms
11.
12. .Mix OTC @ 100 Gms per ton of Fish per Day for 6-7 days
•Reduce stocking Density
• Better management of Water Quality
Treatment
13. Hemorrhagic Septicemia
(Infectious abdominal Dropsy)
Causative Agent: Aeromonas sp.
• Commonly Called as Red Diseases (sores on the body)
• Dropsy
• Colon, Intestine, Anus become reddish in colour
• Eyes protruded
• Pus comes out through anus
• Common in summer season
Symptoms
17. •Mix 100 mg teramycine tablet/kg feed of Fish for 5-6 days
•Application of 5 ppm Potassium permanganate
•Manage Water quality
• Infected fish should removed from the pond
When dropsy makes its appearance, any dead fish should be
collected, and buried. Those which have been ill are never put into
hybernation together with healthy fish. After the fish have been
removed the tanks should be disinfected with quick
lime and are left dry throughout the winter period.
Treatment
18. Columnaris
(Commonly called as Saddle Back Disease )
Causative Agent: Flexibacter columnare
1. Initial stages exhibit small greyish patches over head, on the
edges of the scales and on the fins, although the gills and lateral
sides of the body may also be affected. A chararacteristic lesion
produced by columnaris is a pale white band encircling the body,
often referred to as saddle back.
2. In the later stage the pathogen penetrates the epidermis and
dermis and forms red ulcerations in the musculature. The gill
filaments disintegrating and gill necrosis observed.
3. Mass mortality of Fish particularly Rohu fish
4. Commonly noticed in Winter season
Symptoms
20. •Mix OTC @ 100mg per Ton of Fish per day for 6-8 days
•Reduce Stocking Density
•Water Quality management
•Pond bottom management
Treatment
21. Diseases caused by Fungus
(Fungal Diseases)
Fish disease caused by fungal infection is encountered in
eggs, fry, fingerlings and adult fishes. They are primarily
recorded as secondary invader and are known to attack
the host when it gets injured either mechanically or as a
result of infection other than fungal.
22. Saprolegniasis
(Water mold, Skin Fungus, Cotton Wool Disease)
Saprolegniasis is mainly a secondary infection seen after damage
to the fish integument (skin and gills) caused by parasites, viruses,
bacterial infections and other skin damage. Other predisposing
factors include water pollution and over crowding.
Less commonly saprolegnia can act as a primary pathogen
infecting fish that haven’t shown signs of previous damage.
It is believed that such attacks are temperature-dependant,
usually occurring at low temperatures, possibly as a consequence
of a reduced immune response. As well as being a threat to fish,
Fungus can also affect fish eggs. It is usually the infertile eggs
that are first infected, but if untreated the fungus soon spreads
to nearby, healthy eggs.
Causative Agent: Saprolegnia parasitica
23. Symptoms of Saprolegniasis
1. Fish fungus appears as grey/white patches on the skin or gills of
host fish or eggs that resemble tufts of cotton-wool.
At a later stage they may become brown or green as they
trap sediment or green algae.
2. Microscopic examination shows broad, non-septate (no dividing
cell walls) hyphae of varying diameters.
3. Gills necrotic
4. Brushing against solid objects
5. In severe cases Saprolegnia may actually penetrate into the
muscle tissue.
6. Fishes become lethargic, listless and less responsive to external
stimuli
26. •Dry the pond and remove the silt
•Reduce the stocking density
•Reduce Organic Matter
•Apply Formalin @ 1lt + 100 Gms of Malachite Green per
Acre
•Mix Salt @ 50-60 Kgs per ton of Feed for 5-6 days
Treatment
28. Symptoms of Branchiomycosis
1. The gills lose their normal red colour and turn yellowish brown
2. The affected gill filaments die, decompose, and fall off.
3.The fish become lethargic, gasp for air, breath with difficulty,
and finally suffocate
29.
30. Effect on Host:
The pathogenic fungus forms long tubule in the gill epithelium
of the fish. The hyphae displace the host tissue and stop the
blood supply to the gills by causing swelling and destruction
of the blood vessels. Large patches of the destroyed gills
become necrotic and fall off.
31. •Dry the pond and remove the silt
•Reduce the stocking density
•Reduce Organic Matter
•Liming the pond @ 50kg/ha
•Apply Formalin @ 1lt + 100 Gms of Malachite Green per Acre
•Mix Salt @ 50-60 Kgs per ton of Feed for 5-6 days
•Bath treatment of the affected fish with Sodium Chloride
@ 3- 5%
Treatment
33. PROTOZOAN DISEASES
Protozoans constitute one of the most important group of animal
parasites affecting fish. Protozoans are one –celled organisms that
consist of a cell nucleus enclosed by a cell membrane. Many of
them cause fatal disease if the fish are not treated in time
34. Icthyophthiriasis
(White spot disease, Sand grain or gravel disease or Ich)
Causative Agent: Ichthyopthirius multifilis
Symptoms:
1. Minute white spots, nodular in form and in size are visible on
the skin, fins and gills
2. Affected fishes show irritation, erratic movement and
restlessness with tendency to rub on the sides.
3. Heavy Mucous Secretion
4. Gills Necrotic
5. Looses natural colour and stops Feeding
36. Trichodiniasis
Causative Agent: Trichodina reticulata
Symptoms:
1. Colour of the gills turn pale and there is a creamish coating due
to excessive mucus secretion.
2. Heavily infested fishes gradually become sluggish and lose
weight, and very often, there is asphyxia.
3. Fish Glides and Swims erratically and Dies
4. Gills necrotic
5. More acute during summer months
37. Treatment:
•Reduce Stocking Density
•Apply Formalin @ 1 lt + 100 Gms malachite Green per acre
•Sodium chloride bath treatment @ 2-3% till the fishes are
stressed
•Reduce Organic Manure & Load
38. Myxosporidians
Causative Agents: Myxobolus sp
Symptoms:
1. Lives in Alimentary canal & Gills
2. Spores are spindle/ Oval shaped
3. Cysts are commonly seen in Gills as white spots
4. Each cyst contains lakhs of Spores
5. Commonly noticed in winter season -causes respiratory problem
6. Poor Growth
39. Treatment:
• Drying of Pond
• Mix Salt @ 50 kgs per ton of feed for 5 days
•Formalin @ 1.5 Lts per Acre
40. Helminth Parasites
Helminths of the group Monogenea parasite various fish
species causing their growth retardation and mortality.
Their body is dorsoventrally flattened. They have
attachment organ, called haptor at the posterior end,
with varying number of median and marginal hooks.
They are ectoparasites. Generally host specific. Live on the
skin and gill of fish. The grasping hooks on the posterior
end serve to hold on to the skin of the host
41. Helminth Parasites
Dactylogyrus Gyrodactylus
Haptor with 14 marginal hooks,
squamodisc absent
Haptor with 16 marginal hooks,
squamodisc present
The anterior end is provided with two
pairs of eye spots
No eye spots
Oviparous, laying eggs and live as
parasites, particularly in gills
Viviparous and liberates live young
worms
Head is scalloped V shaped head (bilobed)
Parasitize particularly the gills Parasitize the skin and more rarely
the gills
42. External symptoms of Dactylogyrus infection:
1.The colour of gills fade and there is excessive secretion of mucus
causes reparatory problems.
2. At the site of attachment, gill tissue erosion occur
3. Growth reduction of affected fishes
4. In heavy infestation fishes become feeble and rest near
the pond side
Treatment:
•Drying of Pond
•Low Stocking Density
•Application of 15 ppm formalin in pond
•Sodium chloride bath treatment @ 3- 5% for 10 – 15 minutes
44. External symptoms of Gyrodactylus infection:
1.Fading of the normal body colur
2. Dropping of scales
3. Excessive mucus secretion
4. Growth reduction of affected fishes
5. In heavy infestation fishes become feeble and rest near
the pond side
Treatment;
•Drying of Pond
•Low Stocking Density
•Application of 15 ppm formalin in pond
•Sodium chloride bath treatment @ 3- 5% for 10 – 15 minutes
45. Crustacean Parasites
Crustaceans are almost without exception aquatic animals which
breath by means of gills . The grater part of the crustaceans
undergo a metamorphosis with frequently includes a nauplius
stage. Sexual dimophism is common among parasitic crustaceans.
Crustacean parasites are frequently found to infest fishes.
Infestation of fishes in confined water very often causes serious
diseases outbreak.
47. External Symptoms:
1. The adult parasite is oval, flat, transparent to whitish with two
conspicuous black spots. It attaches to the skin and fins of the
fish via suckers and feeds on blood.
2. It is visible moving freely on the surface of the host fish.
3. Affected fishes are restless with erratic swimming behaviour
4. Loss of appetite
5. Attachment sites shows sign of ulceration
6. In case of severe infection, growth retardation and sometimes
mortality occur.
7. Flickering and Gliding of Fish . Infested fish rub on submerged
objects or bottom substrates in an attempt to dislodge the parasite
from their skin
8. Heavy mucous on the body
49. Propagation:
Mature Argulus sp inhabit the host fish. After copulation the
female leaves the host and lays sticky eggs (20 – 250) on the
submerged vegetation, rocks objects etc. Eggs hatch into larva
and develops into adult form after a few days. The entire life cycle
Takes 40 – 100 days depending on the water temperature. All the
Free living stages are parasitic to fish.
50. •Reduce Organic Matter
• Apply Cypermethrin @ 100 ml per acre
• Apply 1 – 2 ppm dichlorves (Nuvan)
• Mix Ivermectin ( 0.1 %) in Feed @100-125 Gms per ton of
Fish for 5days
Treatment
52. Symptoms:
1.Infestation occurs in gills, buccal cavity, operculum and fins.
2. They look like whitish, elongated objects on the gill filaments.
3. They damage the fish by digesting its epithelial cells
4.Surfacing, lethargy and restlessness of affected fish occur
5. Since the parasites often change position on the fish, the gills
Suffer widespread damage.
6. Secondary infections often occur, particularly with fungus.
7. Heavily infected fish suffer from anemia, become emaciated,
and are susceptible to many other diseases.
53. Treatment:
•Application of 5 ppm Potassium permanganate
•Provide Balanced Diet
•Reduce Stocking Density
•Sodium chloride bath treatment @ 2-3% for 15 minutes
55. Symptoms:
1. Fish body cavity and head region is affected by Lernaea sp
2. In light infestation the fishes are restless and rub against the
sides and bottom of the pond due to irritation.
3. Heavily infested fishes become moribund with erratic
movement and emaciation.
4. Parasite penetrates in the body and swallows the tissues
and make host weaker and emaciated
5. More acute in winter season
56. Treatment:
•Sodium chloride bath treatment @ 2- 5% for 15 minutes
• Provide balanced highly vitaminised Feed
• Reduce Stocking Density
57. Epizootic Ulcerative Syndrome (EUS)
Mixed Infection of Bacteria, Fungus, Protozooans
Black & White fish are affected in winter season
Reddish & Grayish wounds are noticed on the Body
Mass mortality of Fish noticed
58.
59. • Apply Quicklime @ 50 kgs + 30 kgs salt per acre
•Sulphadiazine application in feed @ 100mg/kg of feed
• Mix OTC( 10 %) @100 Gms + Furazolidon @ (20%) @50 Gms
per ton of Fish per day for 6-7 days
•Application of CIFAX gives good result
Treatment
61. Nutritional Deficiency Problems
Problem Symptoms Deficiency
Lordosis Wrinkle of Body Vit. C ,A, P,Mg
Catract Fatty Layer in Retina
Methionine,Vit.A
Necrotic Fin & Tail Rot Lysine,Vit. A&C
Fatty Liver High Fat in Liver Cholin, Stale
feeds
Blood Spots Blood spots at Fin Riboflavin &
bases Pantothenic
Acid
62. Environmental problems
1. High Nitrite:
> 01 ppm of Nitrite in the water Toxic to fishes –
causes Respiratory problem
Gills become Chocolate colour
Treatment:
•Water Exchange
•Apply Quicklime @ 30-40 Kgs + 40 kgs per acre
•Use Bioremediators
63. >0.1 Free ammonia is Toxic to Fish
Fish Becomes lethargic
Surfacing during early morning
Stops Feeding
Mass Mortality
Treatment:
•Water Exchange
•Apply Zeolite @ 10-15 Kgs per Acre
Ammonia Toxicity
64. Oxygen Deficiency
< 2 ppm of Oxygen is harmful to Fish
Surfacing & Air Gulping during early morning
Mass level Mortality
Fish Colour fades and become pale
Treatment:
• Exchange with freshwater
• Apply Calcium Peroxide @ 500-600 Gms per Acre
• Apply Hydrogen Peroxide @ 500-750 ml per Acre
65. Disease Prevention Measures
• Good water & Soil Characteristics
• Quality and balanced Diet
Protein: 18-20 %
Fat : 3-4 %
Energy: 3500-4500 Kcal per kg Feed
• Better management Practices
• Drying of Pond and Removal of Silt in everyyear
• High stocking Density should be avoided
• Removal of / Prevention of Entry of Molluscs ,Weed Fish
• Selection of Quality Fish Seed
• Treatment of Fish seed with 1% salt and Potassium
permanganate before stocking
66. Probiotics are dietary supplements of live microorganisms
thought to be healthy for the host organism.
According to the currently adopted definition by FAO/WHO,
probiotics are: "Live microorganisms which when administered
in adequate amounts confer a health benefit on the host".
Lactic acid bacteria (LAB) and bifidobacteria are the most
common types of microbes used as probiotics; but also certain
yeasts and bacilli are available.
PROBIOTICS
68. Formalin
• Aqueous solution of of 37 – 40% by weight of formaldehyde gas
• It kills protozoan, fungal and helminth parasites
• Formalin is highly toxic to phytoplankton and oxygen depletion
may occur in pond due to algal death
BKC (Benzalkonium Chloride)
• It is a compound of mixture of alkyl dimethyl benzyl ammonium
chlorides.
• It has anti-bacterial and anti-fungal property
• This compound is available as 50% and 20% solution
commercially.
• Dosage for treatment of pond water is 0.5 – 1.0 ppm for 50%
solution and 1.0-2.0 ppm for 20% solution
69. Potassium Permanganate
•It is a strong oxidising agent with good antimicrobial activity
• It releases nascent oxygen while desolving in water.
•The nascent oxygen destroys micro organisms as well as organic
organic substances, through its oxidising action
•Do not use Potassium permanganate frequently since the manganese
metal and manganese dioxide may settle on the gill surface of fish/
prawn and interfere with their respiration
Malachite Green
• It is greenish crystal with metalic lusture. It is very soluble in water
The water solution appears as blue-green
* It is very effective against fungal disease.
70. Zeolite
•It occurs naturally in sedimentary and volcanic rocks
•Commercially it is found in the form of grayish-powder form
•The cations in zeolite are mobile and capable of undergoing
ion exchange. Therefore zeolite act as a cation exchanger. It
can selectively absorb NH4
+ in water
Acriflavine
• It is also known as 3,6-Diamino-10-methylacridinium chloride
• It is an antiseptic, protozoacide.
71. Oxytetracycline (OTC)
• It is a broad-spectrum antibiotic against gram-positive and gram-
negative bacteria
• It is also effective against some protozoan infections
• It inhibits the synthesis of bacterial proteins. Thus the growth
of bacteria is controlled
• It is readily absorbed from the intestinal tract and can get into
bacterial cell quickly. Hence it is more effective when given orally