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Induced spawning and larval rearing of grouper (Epinephelus salmoides Maxwell)

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Date
1986
Author
Kungvankij, Pinij
Tiro, L.B.
Pudadera, B.P.
Potestas, I.O.
Page views
2,685
Subject
aquaculture systems ASFA
spawning ASFA
fish culture ASFA
induced ovulation ASFA
rearing techniques ASFA
sex hormones ASFA
Grouper
Larval rearing
Taxonomic term
Epinephelus salmoides GBIF
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Abstract
Broodfish of grouper (Epinephelus salmoides ) were induced to spawn by hormonal induction. The hormones used for this experiment were HCG + pituitary gland (PG) and LRH-a. The results showed that at dosages of 500 IU HCG + 3 mg of PG per kg of fish for first injection and 1,000 IU HCG + 3 mg of PG per kg of fish at the final injection at an interval of 24 hours, the treated fish spawned naturally in a spawning tank 12 hours after the final injection. At lower dosages of 500 IU HCG + 3 mg PG at 12-hour intervals or 500 IU HCG + 3 mg PG at 24-hour intervals or using 10 mg LRH-a at 12-hour intervals, the eggs can be artificially fertilized only by stripping. The larval rearing experiment was conducted in a 250-l fiberglass tank at the stocking density of 2,500 larvae per tank. Feeds used in this experiment were: (a) Isochrysis + sea urchin eggs; (b) Isochrysis + Brachionus ; and (c) Tetraselmis + Brachionus . The results showed that newly hatched larvae fed with Isochrysis mixed with sea urchin eggs and then Brachionus from day 10 had the best survival rate (9% at day 30).
Description
Excerpt from The First Asian Fisheries Forum. Asian Fisheries Society, Manila, Philippines.
URI
http://hdl.handle.net/10862/520
Type
Conference paper
Collections
  • Conference Proceedings [289]

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