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| Kimani, E.N.; Mavuti, K.M.. |
| Pearl oysters are an important marine resource within the Indo-Pacific oceans. They are widely cultured for the production of black pearls, their flesh is eaten, and their shell, known as mother-of-pearl (MOP) is used in the ornament and button industry. The blacklip pearl oyster, Pinctada argaritifera L., has been harvested from East Africa for MOP for decades. A survey within nearshore habitats in Kenya showed that Pinctada margaritifera is widely distributed in shallow lagoons, bays and channels. Other oyster species found during the survey were the wing oyster, Pteria penguin, occurring in deep channels in Shimoni and Mombasa, and Pt. chinensis, within lagoons and channels in Malindi, Mombasa and Shimoni. Pinctada margaritifera was most abundant in... |
| Tipo: Journal Contribution |
Palavras-chave: Oyster fisheries Pinctada margaritifera Abundance Population structure Sex behaviour Pteria penguin Pteria chinensis ISW; Kenya. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/39 |
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| Mavuti, K.M.; Kulmiye, A.J.. |
| Panulirus homarus homarus is the most widely distributed among the three P. homarus subspecies and is the second most important spiny lobster in the Kenyan lobster fishery after P. ornatus. Growth and moulting of lobsters, held in concrete tanks with a flow-through seawater supply and at ambient temperatures, were monitored for 18 months (October, 2001 - March, 2003). Both moult increment and moulting frequency were inversely correlated with size. Mean moult increment ranged from 4mm in the 36-45 mm CL size class to 0.6 mm in the 86-95 mm CL size class. Mean intermoult period increased from 49 days in the 46-55 mm CL size class to 81 days in the 86-95 mm CL size class. Growth rates were 19% and 46% higher for males and females, respectively during the... |
| Tipo: Conference Material |
Palavras-chave: Panuliris homarus homarus; Injury; Growth; Moulting; Kenya; Lobster fisheries. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/723 |
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| Nyunja, J.A.; Mavuti, K.M.; Wakwabi, E.. |
| The food habits of two schooling planktivorous fishes, Sardinella gibbosa and Atherinomorous lacunosus, were investigated in Mtwapa creek and Wasini Channel of the Kenya coast. Spatial and temporal variations in their food and feeding habits were assessed using the percentage numerical abundance method, percentage frequency of occurrence, stomach fullness indices and the Tokeshi graphical method. This study established a clear spatial separation of Mtwapa creek from Wasini Channel in terms of the abiotic and biotic data. Highly significant differences (t-test, p < 0.05) were observed between the two study areas in temperature, salinity, transparency, conductivity, chlorophyll a and in zooplankton abundance and diversity. The diet of the two fish species... |
| Tipo: Journal Contribution |
Palavras-chave: Ecology Marine fishes Habitat selection ISW; Kenya. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/40 |
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