Aquaculture
Door sathsarani karunarathna
1. Scales
1.1. Placoid scales Ganoid scales Ctenoid scales
2. Feeding habits
2.1. Detritivore Herbivore Carnivorous Omnivorous
2.1.1. Tools for getting food to the digestive system
2.1.1.1. Mouth Teeth Pharynk Grillrakers
2.2. Fish form and movement
2.2.1. Fusiform Anguliform Filiform Sagittiform Compressiform Depressigorm Golbiform Odd-shape Rattail
3. Characteristics of aquaculture
3.1. Extensive Semi-intensive Intensive Super intensive
4. Integrated fish farming
4.1. Advantages
4.1.1. Recycling of waste Higher production More employment Increased economic benefits
4.2. Fish plus chicken farming Fish cum duck farming Fish culture with pig raising Fish farming with agriculture
5. Three groups of fishes
5.1. Jawless fishes Cartilaginous fishes Bony fishes
6. Mouth position
6.1. Superior Terminal Sub-terminal Infirior
7. Types of fins
7.1. Pairred fins Dorsal fins Anal fins Caudal fin Adipose fin
7.1.1. Dorsal fins modification
7.1.1.1. Spine dorsal fin Trigger Single Split Trailing dorsal fin
7.1.2. Caudal fins
7.1.2.1. Two general types
7.1.2.1.1. Homoceral Heteroceral
8. Fish behaviors
8.1. Migration Shoaling Feeding Aggression Resting Communication
8.1.1. Fish migration
8.1.1.1. For food gathering,temperature adjustment, breeding and protection
8.1.1.2. Classification of fish migration
8.1.1.2.1. Diadromous Anadromous Catadromous Amphidromous Potamodromous Ocenodromous