|
OceanDocs >
Africa >
Kenya >
Kenya Marine and Fisheries Research Institute >
Conference Papers >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1834/1175
|
| Title: | Mortality rate, exploitation and recruitment in Oreochromis niloticus (Linnaeus) in Nyanza Gulf of Lake Victoria, Kenya |
| Authors: | Getabu, A. |
| ASFA Terms: | Exploitation
Fishery management
Lake fisheries
Mortality |
| Issue Date: | 1994 |
| Publisher: | ICIPE SCIENCE |
| Citation: | Okemwa, E.; Wakwabi, E.O.; Getabu, A . (Ed.) Proceedings of the Second EEC Regional Seminar on Recent Trends of Research on Lake Victoria Fisheries, Nairobi : ICIPE Science Press, p. 43-52 |
| Abstract: | An analysis was done on length frequency data to study mortality,
exploitation rate and recruitment in Oreochromis niloticus in Nyanza
Gulf, Lake Victoria. The fishing mortality (F) and natural mortality
(M) were 0.468 y super(-1) and 2.0 y super(-1) respectively. The
exploitation rate was 57.2%. Yield per recruit under the fishing
regime was 250 g. Its predicted value at maximum sustained yield was
530 g, which could be obtained at a fishing mortality of 1.5 y
super(-1). The recommended value was 500 g to be obtained at a fishing
mortality of 1.0 y super(-1). The maximum biomass per recruit (B/R)
was 1132.48 g while the optimum was 1068.38 g. The biomass recruit
under the present fishing regime is 534.19 g which is too low. There
is severe overfishing as there are a lot of immature fish in the
catch. The analysis shows that the yield can double if the recommended
mesh size is adopted in the fishery. |
| URI: | http://hdl.handle.net/1834/1175 |
| ISBN: | 9290640789 |
| Appears in Collections: | Conference Papers
|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
|
