Question

Which of the following is not used in the induced breeding of Indian major carps?

• A. Ovatide
• B. Ovaprim
• C. Methyl testosterone
• D. Wova -FH

Hint:

Induced Breeding Agents: Ovaprim, Ovatide, Wova-FH, Gonapro, Pituitary Extract (Induce Spawning). $17\alpha$-Methyltestosterone = SEX REVERSAL (NOT spawning).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Synthetic GnRH analogues vs steroid hormones: Ovaprim, Ovatide, and Wova-FH are synthetic peptide/dopamine-antagonist spawning agents, whereas methyltestosterone is an androgen used strictly for sex reversal.

Step 2: Detailed Explanation:
Pharmaceuticals used in fish spawning vs sex manipulation:
1. Induced Breeding Spawning Agents (GnRH Analogues + Dopamine Antagonists):
- Ovaprim: Synthetic Salmon GnRH analogue (sGnRHa, $20\;\mu\text{g/mL}$) $+$ Domperidone ($10\text{ mg/mL}$).
- Ovatide: Synthetic peptide analogue $+$ Dopamine antagonist.
- Wova-FH: Synthetic LHRH analogue $+$ Domperidone.
- (All three are commercial liquid formulations universally used for induced spawning of Indian major carps).
2. 17-Alpha Methyltestosterone (C): An androgen steroid used exclusively for phenotypic sex reversal (producing all-male tilapia), NOT used for induced breeding of carps.

Step 3: Final Answer:
Therefore, Methyl testosterone is not used in induced breeding, matching option (C).