Fish and Fisheries — DU B.Sc. (Hons.) Zoology Previous Year Question Papers

7. Write short notes on any three of the following : (a) Inland fisheries 5+5+5 (b) Finfish hatcheries (c) Fishery by-products (d) Role of remote sensing in fisheries (e) Fish buoyancy B.Sc. (Prog) Life (d) Draw neat and well-labelled diagrams wherever needed. 1. (a) Define the following : 5 (i) Fish aquarium (ii) Fishing gear (v) Brood fishes (b) Differentiate the following : 10 (i) Sarcopterygii and actinopterygii (ii) Shoaling and schooling (iii) Pen culture and cage culture (iv) Marine fisheries and estuarine fisheries (v) Anadromous and catadromous fishes (c) Match the following : 4 (i) Indian Major Carp (a) Anabas testudineus (iv) Walking Catfish (d) Gambusia affinis (iii) Sawfish (e) Fill in the blanks : 3 (i) Placoid scales are present in ............... (ii) The mouth of .............. fish has four pairs of sensory tentacles. (iii) The major osmoregulatory organ in elasmobranchs is .............. . (b) What is a transgenic fish? Explain the steps used to produce it. 7 3. (a) Describe the structure of fish gills and explain their role in respiration. 7 (b) Define the term migration. Discuss the mechanism of migration in fish. 8 4. (a) Enumerate the causes of depletion of fishery resources. 8 (b) Give a brief account of fishery regulation in the marine sector. 7 5. (a) What is aquaculture? Enumerate the factors that affect aquaculture. 7 (b) What is broodstock management? Explain its importance. 8 6. (a) Give an account of the processing of harvested fish. 7 (b) What is composite fish culture? Explain it with suitable examples. 8