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Questions and Answers
What is the maximum oocyte size for female broodstock in siganids that can still respond to hormonal manipulation?
What is the maximum oocyte size for female broodstock in siganids that can still respond to hormonal manipulation?
- 0.42 mm (correct)
- 0.35 mm
- 0.30 mm
- 0.50 mm
Which hormone is responsible for initiating the final stages of oocyte maturation and ovulation in siganids?
Which hormone is responsible for initiating the final stages of oocyte maturation and ovulation in siganids?
- hCG
- Luteinizing Hormone (LH) (correct)
- LH Releasing Hormone (LHRH)
- Progesterone
What triggers the hypothalamus to secrete LH Releasing Hormone (LHRH)?
What triggers the hypothalamus to secrete LH Releasing Hormone (LHRH)?
- Feedback from LH
- Inhibition of gonadotropin release
- Release of estrogen
- Presence of hCG (correct)
What is the role of LH in the hormonal treatment of fish spawning?
What is the role of LH in the hormonal treatment of fish spawning?
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Which of the following hormonal treatments can induce oocyte maturation and spawning in siganids?
Which of the following hormonal treatments can induce oocyte maturation and spawning in siganids?
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Study Notes
Siganids Treatment and Spawning
- Female broodstock with oocyte size ≤ 0.42 mm are ineffective for hormonal manipulation in induced spawning attempts.
- Final maturation of young egg cells and ovulation is triggered by an LH surge.
- Administration of hCG stimulates the hypothalamus to release LH Releasing Hormone (LHRH).
- LHRH causes the anterior pituitary to release LH, activating the fish hormone feedback mechanism.
- Hormonal treatments such as hCG, LHRH, and LH are employed to promote oocyte maturation and spawning in fish.
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