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dc.contributor.authorTan-Fermin, Josefa D.
dc.date.accessioned2013-02-04T09:59:59Z
dc.date.available2013-02-04T09:59:59Z
dc.date.issued1992
dc.identifier.citationTan-Fermin, J. D. (1992). Withdrawal of exogenous 17-alpha methyltestosterone causes reversal of sex-inversed male grouper Epinephelus suillus (Valenciennes). The Philippine Scientist, 29, 33–39.en
dc.identifier.issn0079-1466
dc.identifier.urihttp://hdl.handle.net/10862/1400
dc.description.abstractThe protogynous hermaphrodite groupers Epinephelus suillus were given bi-weekly injections of 17 alpha-methyltestosterone (MT) intramuscularly for three to six months. Spermatogenesis occurred after three months of MT treatment while spermiation was observed after five to six months of MT treatment in larger fish. Neither cannulated tissue nor milt was obtained when the remaining fish were sampled four months after withdrawal of exogenous MT. However, vitellogenic eggs (size range = 0.34 to 0.56 mm) were cannulated eight months after termination of MT treatment. Presence of eggs in fish which previously had expressible or cannulated milt indicates that the sex-inversed male E. suillus reverted back to the female condition upon withdrawal of exogenous MT. This information is useful in the line production of functional males which is the limiting factor in induced breeding of groupers.en
dc.language.isoenen
dc.publisherSan Carlos Publicationsen
dc.subjectSerranidaeen
dc.subjectEpinephelus suillus
dc.titleWithdrawal of exogenous 17-alpha methyltestosterone causes reversal of sex-inversed male grouper Epinephelus suillus (Valenciennes)en
dc.typeArticleen
dc.citation.volume29
dc.citation.spage33
dc.citation.epage39
dc.citation.journalTitleThe Philippine Scientisten
dc.subject.asfaBiological fertilizationen
dc.subject.asfaFish cultureen
dc.subject.asfaHermaphroditismen
dc.subject.asfaMarine fishen
dc.subject.asfaSex hormonesen
dc.subject.asfaSex reversalen
dc.subject.asfaSpermatogenesisen


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  • AQD [1129]
    These papers were contributed by AQD staff to various national and international journals

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