Fisheries — MCQs Biology – T4Tutorials .PK

50 min Score: 0 Attempted: 0/50

1. Fisheries biology is the study of:
(A) Mammals
(B) Birds
(C) Fish and their management
(D) Reptiles

2. Aquaculture refers to:
(A) Livestock farming
(B) Hunting wildlife
(C) Forestry
(D) Cultivation of fish and aquatic organisms

3. Capture fisheries involve:
(A) Only breeding fish in ponds
(B) Harvesting wild fish from natural habitats
(C) Only fish feeding
(D) Only fishing in aquaculture farms

4. Freshwater fish live in:
(A) Mangroves only
(B) Oceans only
(C) Estuaries only
(D) Rivers, lakes, and ponds

5. Marine fish live in:
(A) Lakes only
(B) Rivers only
(C) Oceans and seas
(D) Ponds only

6. Brackish water fish live in:
(A) Estuaries where freshwater meets seawater
(B) Rivers only
(C) Lakes only
(D) Oceans only

7. Carp is an example of:
(A) Brackish water fish
(B) Marine fish
(C) Freshwater fish
(D) Predatory fish only

8. Hilsa belongs to:
(A) Marine and estuarine fish
(B) Freshwater fish
(C) Pond fish only
(D) Aquarium fish only

9. Fish are cold-blooded, meaning:
(A) Only larvae are cold-blooded
(B) They regulate their own temperature
(C) They are warm-blooded
(D) Their body temperature depends on the environment

10. Fish breathe using:
(A) Gills
(B) Lungs
(C) Skin only
(D) Spiracles only

11. Fish scales provide:
(A) Only color
(B) Protection and reduce friction in water
(C) Only respiration
(D) Only reproduction

12. Fish fins are used for:
(A) Reproduction only
(B) Respiration only
(C) Locomotion and stability
(D) Feeding only

13. Teleost fish are:
(A) Shellfish
(B) Cartilaginous fish
(C) Jawless fish
(D) Bony fish

14. Sharks and rays are:
(A) Freshwater fish only
(B) Bony fish
(C) Jawless fish
(D) Cartilaginous fish

15. Lampreys belong to:
(A) Jawless fish
(B) Bony fish
(C) Cartilaginous fish
(D) Sharks only

16. Fish feed on:
(A) Plankton, algae, insects, smaller fish
(B) Only algae
(C) Only insects
(D) Only plants

17. Piscivorous fish feed on:
(A) Plankton only
(B) Plants only
(C) Other fish
(D) Detritus only

18. Planktivorous fish feed on:
(A) Other fish
(B) Plankton
(C) Algae only
(D) Insects only

19. Herbivorous fish feed on:
(A) Other fish only
(B) Plants and algae
(C) Detritus only
(D) Insects only

20. Omnivorous fish feed on:
(A) Plants only
(B) Both plants and animals
(C) Animals only
(D) Detritus only

21. Fish reproduction can be:
(A) Oviparous, viviparous, or ovoviviparous
(B) Only viviparous
(C) Only oviparous
(D) Only external fertilization

22. Oviparous fish lay:
(A) Buds only
(B) Live young
(C) Spores only
(D) Eggs

23. Viviparous fish give:
(A) Eggs only
(B) Birth to live young
(C) Larvae only
(D) Spores only

24. Ovoviviparous fish:
(A) Give live birth only
(B) Lay eggs externally only
(C) Produce eggs that hatch inside the female
(D) Only reproduce asexually

25. Fish farming requires:
(A) Only feeding
(B) Suitable water quality, feed, and stocking density
(C) Only breeding
(D) Only nets

26. Monoculture in aquaculture means:
(A) Wild capture only
(B) Cultivating multiple species
(C) Cultivating one species
(D) Only ornamental fish

27. Polyculture in aquaculture means:
(A) Wild capture
(B) Cultivating one species only
(C) Cultivating multiple compatible species
(D) Ornamental fish only

28. Fish feed includes:
(A) Natural (plankton, insects) and artificial (pellets)
(B) Only plankton
(C) Only pellets
(D) Only detritus

29. Overfishing can cause:
(A) Increase in fish population
(B) Decline in fish populations and ecosystem imbalance
(C) Only benefits humans
(D) No effect

30. Maximum Sustainable Yield (MSY) refers to:
(A) Only exotic fish
(B) Maximum overfishing limit
(C) Minimum catch
(D) The largest catch that does not reduce future stock

31. Aquaponics combines:
(A) Animal farming only
(B) Fish farming only
(C) Plant cultivation only
(D) Fish farming with plant cultivation

32. Fish ladders are used to:
(A) Help migratory fish bypass dams
(B) Only for feeding
(C) Only for fishing
(D) For breeding ponds

33. Hatcheries are used for:
(A) Breeding and raising fish larvae
(B) Only feeding adult fish
(C) Fishing purposes only
(D) Aquatic plant farming

34. Fingerlings are:
(A) Eggs
(B) Adult fish
(C) Young fish ready for stocking
(D) Larvae only

35. Fish tagging helps in:
(A) Only feeding
(B) Studying fish movement and population
(C) Only breeding
(D) Only harvesting

36. Fish parasites include:
(A) Protozoa, worms, crustaceans
(B) Only bacteria
(C) Only viruses
(D) Only fungi

37. Marine aquaculture is called:
(A) Mariculture
(B) Pond culture
(C) Freshwater culture
(D) Cage culture only

38. Cage culture involves:
(A) Only rivers
(B) Only ponds
(C) Only tanks
(D) Rearing fish in floating cages in water bodies

39. Fishery management includes:
(A) Only breeding
(B) Only fishing
(C) Stocking, monitoring, regulating harvest
(D) Only feeding

40. Artificial breeding helps in:
(A) Only ornamental fish
(B) Decreasing fish production
(C) Increasing fish production and conserving species
(D) Only wild capture

41. Fish conservation methods include:
(A) Pollution only
(B) Overfishing
(C) Habitat destruction
(D) Marine protected areas and sustainable fishing

42. Bycatch refers to:
(A) Fish larvae only
(B) Target species only
(C) Unintended capture of non-target species
(D) Only crustaceans

43. Aquatic plants in fish ponds:
(A) Only decoration
(B) Only food
(C) Provide oxygen and shelter
(D) Only waste removal

44. Fish euryhaline species can:
(A) Only in brackish water
(B) Live only in freshwater
(C) Live only in marine water
(D) Tolerate a wide range of salinity

45. Stenohaline fish can:
(A) Only marine
(B) Survive in all salinity
(C) Only freshwater
(D) Survive only in a narrow salinity range

46. Fish predation affects:
(A) Only feeding
(B) Only reproduction
(C) Population structure and ecosystem balance
(D) Only migration

47. Fish stocking in rivers helps:
(A) Enhance fish population for fisheries
(B) Only feed fish
(C) Only remove predators
(D) Only recreational fishing

48. Overcrowding in fish ponds can cause:
(A) Stress, disease, and reduced growth
(B) Increased growth
(C) No effect
(D) Only better feeding

49. Fisheries contribute to:
(A) Food security and economy
(B) Only recreation
(C) Only tourism
(D) Only ornamental trade

50. Fishery sustainability requires:
(A) Only artificial feed
(B) Overfishing
(C) Only wild capture
(D) Balanced harvesting and habitat conservation