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dc.contributor.authorMavuti, KM
dc.contributor.authorKimani, EN
dc.contributor.authorMukiama, T
dc.date.accessioned2013-06-19T13:46:59Z
dc.date.available2013-06-19T13:46:59Z
dc.date.issued2005
dc.identifier.citationAfrican Journal of Marine Science Volume 27, Issue 3, 2005en
dc.identifier.urihttp://www.tandfonline.com/doi/abs/10.2989/18142320509504117#.UcG1B9hl5m4
dc.identifier.urihttp://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/36299
dc.description.abstractCulture of pearl oysters is rapidly increasing worldwide, including the western Indian Ocean. The oyster Pinctada margaritifera L., which produces the most highly valued black pearls, occurs in East Africa, a nd as been exploited there for the shell for many decades. The growth patterns of P. margaritifera from a natural population in the sheltered back-reef, and fro oysters translocated to a tidal current-swept site, both sites within Gazi Bay, Kenya, are described. The growth rate in the natural population ranged from 31.3mm year−1 (60–65mm size-class) to 7.6mm year−1 (105–110mm size-class). The von Bertalanffy growth coefficient (K), calculated with a fixed L∞ of 127.2mm, was 0.30 for the natural population and 0.38 for the translocated oysters. The mean growth rate during the north-east monsoon season was approximately double that for during the south-east monsoon season. The dailyrate of nacre deposition ranged from 1.3μm to 5.9μm (mean 3.45μm); it declined with the size of oysters and was marginally higher at the high-energy current site. At that rate, it would take approximately two years to produce a marketable cultured half pearl with a 2.5mm layer of nacre. The results of the study are relevant to the understanding of the influence of the environment on growth, and are applicable to the optimisation of growth rate of pearl oysters in the inshore region along the east coast of Africa.en
dc.language.isoenen
dc.publisherTaylor & Francisen
dc.subjectGROWTH RATEen
dc.subjectKENYAen
dc.subjectMONSOON SEASONSen
dc.subjectNACRE DEPOSITIONen
dc.subjectPINCTADA MARGARITIFERAen
dc.subjectTIDAL CURRENTSen
dc.titleGrowth patterns of the pearl oyster Pinctada margaritifera L. in Gazi Bay, Kenya Growth patterns of the pearl oyster Pinctada margaritifera L. in Gazi Bay, Kenyen
dc.typeArticleen


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