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dc.contributor.authorMarte, Clarissa L.
dc.contributor.authorCrim, Laurence W.
dc.contributor.authorSherwood, Nancy M.
dc.date.accessioned2013-01-14T02:15:45Z
dc.date.available2013-01-14T02:15:45Z
dc.date.issued1988
dc.identifier.citationMarte, C. L., Crim, L. W., & Sherwood, N. M. (1988). Induced gonadal maturation and rematuration in milkfish: Limited success with chronic administration of testosterone and gonadotropin-releasing hormone analogues (GnRH-A). Aquaculture, 74(1–2), 131–145.en
dc.identifier.issn0044-8486
dc.identifier.urihttp://hdl.handle.net/10862/1288
dc.description.abstractNine experiments were conducted to investigate the influence of chronic administration of testosterone (T) and gonadotropin-releasing hormone (GnRH) analogues on first maturation of 4- to 6-year-old fish and rematuration of 6- to over 9-year-old spent/regressed fish. Implantation of T or T in combination with luteinizing hormone-releasing hormone analogue (LHRH-A) had no marked effect on maturation rate of 4-year-old milkfish. The percentage of maturing fish was low and similar to controls in Experiment 1 (T, 31–35%; control, 35%) and Experiment 3 (T, 13%; T plus LHRH-A, 28%; control, 22.2%). Most of the 4-year-old maturing fish were males; maturing females were obtained only from the T-implanted groups in Experiment 1. In Experiment 3, T-implanted maturing females were able to retain yolky eggs whereas maturing control females did not, indicating that testosterone may have enhanced vitellogenesis and maintained the integrity of vitellogenic oocytes. Tank-reared maturing 4-year-old females, about half the size of older first maturing females, were induced to spawn. This is the first case of maturation and spawning of 4-year-old milkfish reared in tanks. As in Experiments 1 and 3, the percentage maturation of spent fish in Experiments 7 and 8 was similar for T-implanted and controls. On the other hand, the 4-year-old immature fish in Experiments 2 and 4, the 5- and 6-year-old immature fish in Experiments 5 and 6, and the spent 6-year-old fish in Experiment 9 were immature or regressed throughout. The factors which may have influenced the results of these experiments include age and reproductive history of the fish, timing of hormone implantation, experimental and holding conditions, and stress.en
dc.language.isoenen
dc.publisherElsevieren
dc.subjectTestosteroneen
dc.subjectChanos chanos
dc.titleInduced gonadal maturation and rematuration in milkfish: Limited success with chronic administration of testosterone and gonadotropin-releasing hormone analogues (GnRH-A)en
dc.typeArticleen
dc.identifier.doi10.1016/0044-8486(88)90093-2
dc.citation.volume74
dc.citation.issue1-2
dc.citation.spage131
dc.citation.epage145
dc.citation.journalTitleAquacultureen
seafdecaqd.library.callnumberVF SJ 0235
seafdecaqd.databank.controlnumber1988-22
dc.subject.asfaAnimal physiologyen
dc.subject.asfaAquacultureen
dc.subject.asfaCulture tanksen
dc.subject.asfaRearingen
dc.subject.asfaSex hormonesen
dc.subject.asfaSexual maturityen
dc.subject.asfaSexual reproductionen
dc.subject.asfaSpawningen
dc.subject.asfaAnalogsen
dc.subject.asfaInduced breedingen


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