Fisheries MCQ Quiz - Multiple Choice Questions & Answers Page 3

21. The major osmoregulatory organ in fishes is:

1. Gills
2. Kidney
3. Liver
4. Stomach

22. Elasmobranchs remove sodium chloride through:

1. Gills
2. Kidney
3. Liver
4. Rectal glands

23. The fish remained buried in the mud and sand is:

1. Ostracoderms
2. Lamprey
3. Hag Fishes
4. Sharks

24. Large rostrum is found in:

1. Paddle fishes
2. Lamprey
3. Sharks
4. Chimeras

25. Placoid scales are present in:

1. Salmons
2. Lamprey
3. Sharks
4. Hag Fishes

26. Rat fishes are:

1. Salmons
2. Lamprey
3. Sharks
4. Chimeras

27. Which of the following fishes is viviparous?

1. Salmons
2. Lamprey
3. Sharks
4. Chimeras

28. During mating process in carps when male chase behind the female, this type of chasing is called

1. Thypogyne
2. Lingyne
3. Lataerogyne
4. Subgyne

29. Smooking is used as a technique of

1. Fish preservation
2. Mushroom cultivation
3. Crystalisation of sugar
4. Crop harvesting

30. The hormone administered in fish diet for promoting maleness in grass carp is

1. Thyroxine
2. Oestrogen
3. Methyltestosterone
4. FSH