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Induced spawning of maturing milkfish (Chanos chanos Forsskal) with gonadotropin-releasing hormone (GnRH) analogues administered in various ways

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Date
1987
Author
Marte, C. L.
Sherwood, N. M.
Crim, L. W.
Harvey, B.
Page views
3,653
ASFA keyword
fish culture ASFA
aquaculture techniques ASFA
induced ovulation ASFA
hormones ASFA
AGROVOC keyword
Chanos chanos AGROVOC
Taxonomic term
Chanos chanos GBIF
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Abstract
The response of mature female captive milkfish to mammalian and salmon gonadotropin-releasing hormone analogues (mGnRH-A and sGnRH-A) was investigated. Prior to spawning, six groups of three females received (1) 10–16 μg mGnRH-A from an osmotic pump implanted intraperitoneally (IP); (2) 100 μg mGnRH-A from a cholesterol/cellulose pellet implanted IP; (3) 10 μg/kg mGnRH-A as an intramuscular (IM) injection; (4) 10–16 μg sGnRH-A from an osmotic pump implanted IP; (5) 100 μg sGnRH-A from a cholesterol/cellulose pellet implanted IP, and (6) a cholesterol/cellulose pellet without analogue implanted IP.

The most effective treatment was 100 μg sGnRH-A/fish given in a cholesterol/cellulose pellet; all (3/3) of the fish spawned. However, mGnRH-A was more effective (2/3) compared with sGnRH-A (1/3) if osmotic pumps were used to administer GnRH-A. If the dose and method of administration were not considered, then the salmon and mammalian GnRH analogues were equally effective (62–67%) for induction of ovulation and natural spawning in milkfish. Gonads of control fish regressed.

At the doses tested, injections or pellet implantations were more effective compared with osmotic pumps. All pellet-implanted and injected females responded to treatment and 75% (6/8) spawned; half (3/6) of the pump-implanted females spawned. Spawning occurred from 18 to 36 h after treatment.
Description
Contribution No. 185 of the SEAFDEC Aquaculture Department.
URI
http://hdl.handle.net/10862/1273
Suggested Citation
Marte, C. L., Sherwood, N. M., Crim, L. W., & Harvey, B. (1987). Induced spawning of maturing milkfish (Chanos chanos Forsskal) with gonadotropin-releasing hormone (GnRH) analogues administered in various ways. Aquaculture, 60(3-4), 303-310. https://doi.org/10.1016/0044-8486(87)90295-X 
DOI
10.1016/0044-8486(87)90295-X
Type
Article
ISSN
0044-8486
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  • Journal Articles [1180]

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