Fisheries Multiple Choice Questions and Answers

11. In fish body the share of minerals is

1. 1-2%
2. 3-4%
3. 4-5%
4. 5-6%

12. Cartilaginous fishes are:

1. Placoderms
2. Acanthodians
3. Chindrichythyes
4. Osteichthyes

13. pH of vermiculture is kept at

1. Near neutral
2. Alkaline
3. Acidic
4. Highly alkaline

14. If more than single species of fish is cultured at a time, then it is called

1. Monoculture
2. Aquaculture
3. Polyculture
4. Mori culture

15. Pisciculture is rearing and production of

1. Fishes
2. Birds
3. Reptiles
4. Wool yielding animals

16. Inand fisheries are

1. deep sea fishing
2. capturing fishes from sea coast
3. raising and capturing fishes in fresh water
4. oil extraction from fish

17. Isinglass is employed in

1. Preparation of wines
2. Clearing of wines
3. Distillation of wines
4. Preservation of wines

18. Some elasmobranchs have modified pelvic fin for copulation called:

1. Penis
2. Cloaca
3. Clasper
4. None

19. In India which of the following genera of earthworms is extensively used for vermiculture

1. Eudrigaster
2. Eudrilus
3. Pontoscolex
4. Pheretima

20. Sucking mouth and rasping tongue is present in :

1. Ostracoderms
2. Hag fishes
3. Lampreys
4. Sharks