Agriculture Quiz 6

1. Which of the following fish is a protandrous hermaphrodite?

• A. Labeo rohita
• B. Clarias batrachus
• C. Amphiprion percula
• D. Mugil cephalus

Answer: C. Amphiprion percula (Clownfish – male-to-female sex change)

2. The optimum pH range for pond fish culture is:

• A. 4.0 – 6.0
• B. 6.5 – 8.5
• C. 8.5 – 10.5
• D. 5.5 – 7.0

Answer: B. 6.5 – 8.5

3. The term 'hypophysation' in fish breeding refers to:

• A. Induced breeding using synthetic hormones
• B. Selective breeding in captivity
• C. Breeding in marine hatcheries
• D. Artificial fertilization of fish eggs

Answer: A. Induced breeding using synthetic hormones

4. Which of the following is a major carp species native to India?

• A. Cyprinus carpio
• B. Hypophthalmichthys molitrix
• C. Labeo rohita
• D. Oreochromis mossambicus

Answer: C. Labeo rohita

5. The disease Epizootic Ulcerative Syndrome (EUS) in fish is caused by:

• A. Fungus Aphanomyces invadans
• B. Bacteria Aeromonas hydrophila
• C. Virus IHN
• D. Parasite Ichthyophthirius multifiliis

Answer: A. Aphanomyces invadans

6. What is the function of the Weberian apparatus in fishes?

• A. Oxygen absorption
• B. Salt excretion
• C. Sound transmission
• D. Lateral line sensing

Answer: C. Sound transmission (Present in Ostariophysan fishes for hearing)

7. The fish "Chanos chanos" is commonly known as:

• A. Tilapia
• B. Milkfish
• C. Catla
• D. Rohu

Answer: B. Milkfish

8. What is the full form of FFRC (related to Indian fisheries)?

• A. Fisheries and Fishery Resource Conservation
• B. Fish Feed Research Centre
• C. Fisheries Fertilizer Research Corporation
• D. Fish Farmers Resource Centre

Answer: B. Fish Feed Research Centre

9. The best time for pond liming is:

• A. During winter
• B. Immediately after monsoon
• C. Before fertilization
• D. After stocking

Answer: C. Before fertilization

10. Which Indian institute is the apex body for freshwater aquaculture research?

• A. CIFNET – Kochi
• B. CIBA – Chennai
• C. CMFRI – Kochi
• D. CIFA – Bhubaneswar

Answer: D. CIFA – Central Institute of Freshwater Aquaculture