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Course Content
Introduction
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Introduction
Fisheries
Desirable characteristics of fish for culture
Attributes of common carp that makes it suitable for culture
Biology of cultivated indigenous and exotic fish species
Importance of fish
Water Quality
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Temperature
Thermal stratification
Diel fluctuation
Temperature management in fishponds
Dissolved oxygen
Principle sources and sinks of oxygen in water
Measurement of dissolved oxygen
Dissolved oxygen requirements to fish
Solutions for maintaining dissolved oxygen in pond
Turbidity
Turbidity management in fish pond
pH
Effects of pH on fish
Different types of phytoplankton
Pond Management
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Site selection for pond construction
Advantages of liming in pond
Pond fertilization
Inorganic fertilizers
Fertilization level depends on secchi disk transparency value
Feed formulation
Wild and predatory fishes
Control or Eradication measures of predatory fishes
Aquatic Plants and their control
Classification of aquatic plants
Control of aquatic plants
Fish farming system
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Classification of fish farming system
Extensive fish farming system
Semi-intensive fish farming system
Monoculture
Polyculture
Pond culture
Management of cage fish culture
Pen Culture
Construction of pen culture
Raceway culture
Rice-fish farming
Techniques of fish culture in rice fields  
Characteristics of fish suitable for Rice-Fish culture
Other types of cum fish farming
Fish breeding
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Selection of brood stock
Sex identification
Source of brood stock
Feeding
Care and management
Induced spawning or hypophysation
Breeding season of cultivated fishes in Nepal
Fecundity
Dosage of inducing agents for various species of Chinese and Indigenous major carps
Latency period
Spawning
Breeding of common carp
Stages of fish transportation
Conditioning of fish
Methods of packaging and transportation of fish
Fish Disease and Parasites
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Signs of sickness of fish
Fungal diseases of fish
Bacterial disease
Protozoan disease
Disease caused by worms
Disease caused by crustaceans
Non-infectious diseases
Master Principles of Aquaculture – Notes, Case Studies & Practical Insights – with Rahul

Fecundity

  • Refers to number of eggs contained in the ovary prior to spawning period.
  • Can be categorized into two groups, absolute and relative.
  • Absolute fecundity is the total number of eggs in the ovary of an individual fish.
  • Relative fecundity is the number of ripe eggs per kilogram weight of female fish.

 

Fecundity of cultivated carps of Nepal

Fish species

Fecundity

Common carp

100,000-150,000

Silver Carp

60,000-80,000

Bighead carp

50,000-60,000

Grass carp

60,000-80,000

Rohu

2000,000- 4000,000

Mrigal

150,000 – 300,000

Catla

100,000 – 250,000

Nile tilapia

500-2500 per spawning
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