On Thenus orientalis and Metanephrops andamanicus (Macrura, Scyllaridae and Nephropidae) off Kenya coast.
Thenus orientalis Lund and Metanephrops andamanicus (Wood-Mason) occur widely in the Indo-Pacific. In Kenya coastal waters the species occur in various localities. T. orientalis is most common near river mouths on muddy bottoms. These species occur over a wide bathymetric range. T. orientalis has been caught in water from 6-30 m deep down to 640 m. Catches of both species were frequently made in the same hauls chiefly in the Malindi-Ungwana Bay area. Successful fishing was done best using high opening fish and shrimp trawls particularly in the 250-300 m depth range. Catch rates were low in all areas. The highest catch rate for T. orientalis was 9.6 kg/hr at 260 m. This was realized on one occasion. The maximum catch rate realized for M. andamanicus was 60 kg/hr on only one occasion. Availability of these species was found to be greatest in an area of frequent turbulence where the Somali current meets the East African coastal current. Availability was greater during the southeast monsoons than during the north east monsoons suggesting some migration. This could not be confirmed as no area that had a greatest concentration of these crustaceans was discovered during the Northeast monsoons.
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| Format: | Journal Contribution biblioteca |
| Language: | English |
| Published: |
1979
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| Subjects: | Coastal currents, Trawling, Crustacean fisheries, Crab fisheries, Shrimp fisheries, Mud, Lobster fisheries, Habitat, Catch/effort, Monsoons, Thenus orientalis, Metanephrops andamanicus, Marine, Brackishwater environment, |
| Online Access: | http://hdl.handle.net/1834/6734 |
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| Summary: | Thenus orientalis Lund and Metanephrops andamanicus (Wood-Mason) occur widely in the Indo-Pacific. In Kenya coastal waters the species occur in various localities. T. orientalis is most common near river mouths on muddy bottoms. These species occur over a wide bathymetric range. T. orientalis has been caught in water from 6-30 m deep down to 640 m. Catches of both species were frequently made in the same hauls chiefly in the Malindi-Ungwana Bay area. Successful fishing was done best using high opening fish and shrimp trawls particularly in the 250-300 m depth range. Catch rates were low in all areas. The highest catch rate for T. orientalis was 9.6 kg/hr at 260 m. This was realized on one occasion. The maximum catch rate realized for M. andamanicus was 60 kg/hr on only one occasion. Availability of these species was found to be greatest in an area of frequent turbulence where the Somali current meets the East African coastal current. Availability was greater during the southeast monsoons than during the north east monsoons suggesting some migration. This could not be confirmed as no area that had a greatest concentration of these crustaceans was discovered during the Northeast monsoons. |
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