Reproductive Biology of Gerres oyena (Pisces: Gerreidae) Along the Bagamoyo Coast, Tanzania

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dc.creatorLamtane, H. A.
dc.creatorPratap, Harish B.
dc.creatorNdaro, Simon G. M.
dc.date2016-05-20T05:55:11Z
dc.date2016-05-20T05:55:11Z
dc.date2008
dc.date.accessioned2018-03-27T08:23:02Z
dc.date.available2018-03-27T08:23:02Z
dc.descriptionThe reproductive biology of Gerres oyena (Forskal, 1775) (Gerreidae) along the Bagamoyo coast was studied from January to December 1999 using samples from monthly commercial catches. Size at first maturity was 12.8 and 13.9 cm TL for males and females respectively. The sex ratio was found to be 0.98:1 (m:f) and was not significantly different from 1:1. G. oyena spawns throughout the year with two peaks: one in March and the other between October and December, which coincide with the northeast monsoon. Ova-diameter frequency distributions indicated that G. oyena is a multiple spawner. They may spawn in three successive batches within the same prolonged spawning season. On an average, the numbers of mature ova produced were 148,138 per fish. For management purposes, a focus should be on the size of maturation relative to length-body depth or capture size. This would reduce harvesting of prereproductive individuals.
dc.identifierLamtane, H.A., Pratap, H.B. and Ndaro, S.M.G., 2008. Reproductive Biology of Gerres Oyena (Pisces: Gerreidae) Along the Bagamoyo Coast, Tanzania. Western Indian Ocean Journal of Marine Science, 6(1).
dc.identifierhttp://hdl.handle.net/20.500.11810/2167
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2167
dc.languageen
dc.subjectFecundity
dc.subjectGerres oyena
dc.subjectGerreidae
dc.subjectSpawning
dc.titleReproductive Biology of Gerres oyena (Pisces: Gerreidae) Along the Bagamoyo Coast, Tanzania
dc.typeJournal Article, Peer Reviewed

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Department of Aquatic Sciences and Fisheries Technology