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dc.contributor.authorCaberoy, Nora B.
dc.contributor.authorQuinitio, Gerald F.
dc.date.accessioned2013-11-25T03:30:25Z
dc.date.available2013-11-25T03:30:25Z
dc.date.issued1998
dc.identifier.citationCaberoy, N. B., & Quinitio, G. F. (1998). Sensitivity of grouper Epinephelus coioides eggs to handling stress at different stages of embryonic development. The Israeli Journal of Aquaculture-Bamidgeh, 50(4), 167-173.en
dc.identifier.issn0792-156X
dc.identifier.urihttp://hdl.handle.net/10862/1758
dc.description.abstractThe sensitivity of grouper Epinephelus coioides eggs to handling stress at different stages of embryonic development was investigated. Naturally-spawned grouper eggs in floating net cages were collected and handled at the early cleavage, blastula, gastrula, neurula, and eyed stages. Egg viability, hatching rate and percentage of normal larvae were significantly higher (p<0.05) in eggs collected and stocked at the eyed stage than in all other stages. An increasing sensitivity to handling stress was observed in eggs from early cleavage to gastrula, as manifested by the decreasing percentage of viable eggs, hatched, and normal larvae. Sensitivity to handling stress decreased when development reached the neurula and eyed stages. Hatched larvae from eggs handled during the blastula and gastrula stages had high mortalities during the first 3-24 hours after stocking. The results of this study show that grouper E. coioides eggs are most sensitive to handling stress during the early cleavage to gastrula phases. The results imply that harvesting or collection of grouper eggs is best done after neurulation, when the embryo has already formed optic vesicles (eyed stage), to increase egg viability and the hatching rate. It will also minimize mortalities and the occurence of abnormal larvae.en
dc.language.isoenen
dc.publisherSociety of Israeli Aquaculture and Marine Biotechnologyen
dc.subjectembryonic mortalityen
dc.subjectEpinephelus coioidesen
dc.subjectgroupersen
dc.titleSensitivity of grouper Epinephelus coioides eggs to handling stress at different stages of embryonic developmenten
dc.typeArticleen
dc.citation.volume50
dc.citation.issue4
dc.citation.spage167
dc.citation.epage173
dc.citation.journalTitleThe Israeli Journal of Aquaculture-Bamidgehen
dc.subject.asfaembryonic developmenten
dc.subject.asfastressen
dc.subject.asfaanimal embryosen
dc.subject.asfahandlingen


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  • AQD Journal Articles [1213]
    These papers were contributed by AQD staff to various national and international journals

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