An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria
Catch rates for both Nile perch (Lates niloticus) and dagaa (Rastrineobola argentea) from Kenyan waters of Lake Victoria have steadily increased through the 1980s, even though the fishing effort also increased during the same period. However, analysis of catch and effort data within and outside the Nyanza Gulf suggests an increase in catch rates due to a shift in effort from the inshore Gulf region to higher catch rates in the offshore region, rather than an increase in abundance. Analysis of catch rates by gear type both in and outside the Nyanza Gulf show that 1991 catch rates are lower than 1989 levels by 60-80% in some instances. Since the fishing power of these gears has increased during this period, it is likely that fish abundance declined more than catch rates. A dynamic population model is used to stimulate Nile perch dynamics. It indicates that a decline in catches should be anticipated.
Main Authors: | , |
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Format: | article biblioteca |
Language: | English |
Published: |
1995
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Subjects: | Engineering, Fisheries, Multispecies fisheries, Fishing gear, Population dynamics, Stock assessment, Catch/effort, Mathematical models, Victoria Lake, Kenya, Lates niloticus, Rastrineobola argentea, |
Online Access: | http://hdl.handle.net/1834/26064 |
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dig-aquadocs-1834-260642021-07-06T02:12:06Z An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria Rabuor, C.O. Polovina, J.J. Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea Catch rates for both Nile perch (Lates niloticus) and dagaa (Rastrineobola argentea) from Kenyan waters of Lake Victoria have steadily increased through the 1980s, even though the fishing effort also increased during the same period. However, analysis of catch and effort data within and outside the Nyanza Gulf suggests an increase in catch rates due to a shift in effort from the inshore Gulf region to higher catch rates in the offshore region, rather than an increase in abundance. Analysis of catch rates by gear type both in and outside the Nyanza Gulf show that 1991 catch rates are lower than 1989 levels by 60-80% in some instances. Since the fishing power of these gears has increased during this period, it is likely that fish abundance declined more than catch rates. A dynamic population model is used to stimulate Nile perch dynamics. It indicates that a decline in catches should be anticipated. 2021-06-24T16:23:37Z 2021-06-24T16:23:37Z 1995 article 0116-290X http://hdl.handle.net/1834/26064 en http://www.worldfishcenter.org/Naga/na_2226.pdf application/pdf application/pdf 34-37 http://aquaticcommons.org/id/eprint/9455 115 2012-10-12 05:26:11 9455 WorldFish Center |
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Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea |
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Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea Rabuor, C.O. Polovina, J.J. An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
description |
Catch rates for both Nile perch (Lates niloticus) and dagaa (Rastrineobola argentea) from Kenyan waters of Lake Victoria have steadily increased through the 1980s, even though the fishing effort also increased during the same period. However, analysis of catch and effort data within and outside the Nyanza Gulf suggests an increase in catch rates due to a shift in effort from the inshore Gulf region to higher catch rates in the offshore region, rather than an increase in abundance. Analysis of catch rates by gear type both in and outside the Nyanza Gulf show that 1991 catch rates are lower than 1989 levels by 60-80% in some instances. Since the fishing power of these gears has increased during this period, it is likely that fish abundance declined more than catch rates. A dynamic population model is used to stimulate Nile perch dynamics. It indicates that a decline in catches should be anticipated. |
format |
article |
topic_facet |
Engineering Fisheries Multispecies fisheries Fishing gear Population dynamics Stock assessment Catch/effort Mathematical models Victoria Lake Kenya Lates niloticus Rastrineobola argentea |
author |
Rabuor, C.O. Polovina, J.J. |
author_facet |
Rabuor, C.O. Polovina, J.J. |
author_sort |
Rabuor, C.O. |
title |
An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
title_short |
An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
title_full |
An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
title_fullStr |
An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
title_full_unstemmed |
An analysis of the multigear, multispecies fishery in the Kenyan waters of Lake Victoria |
title_sort |
analysis of the multigear, multispecies fishery in the kenyan waters of lake victoria |
publishDate |
1995 |
url |
http://hdl.handle.net/1834/26064 |
work_keys_str_mv |
AT rabuorco ananalysisofthemultigearmultispeciesfisheryinthekenyanwatersoflakevictoria AT polovinajj ananalysisofthemultigearmultispeciesfisheryinthekenyanwatersoflakevictoria AT rabuorco analysisofthemultigearmultispeciesfisheryinthekenyanwatersoflakevictoria AT polovinajj analysisofthemultigearmultispeciesfisheryinthekenyanwatersoflakevictoria |
_version_ |
1756078113196867584 |