Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya
Four fleets of hanging coefficients 0.2, 0.4, 0.6 and 0.8 were used to determine size selectivity and selection factors of Nile perch populations. There was a linear relationship between mesh size and modal length of capture. Positively skewed length frequency distributions were found for smaller mesh sizes with entanglement becoming more prominent in mesh sizes above 101 mm. Nets of 114 to 141 mm stretched mesh yielded higher economic returns than small meshes, the catch consisting of few largefish.
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Format: | book_section biblioteca |
Language: | English |
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Lake Victoria Fisheries Research Project
1999
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Subjects: | Biology, Fisheries, Information Management, Africa, Kenya, stock assessment, data collection, data report, Lates niloticus, |
Online Access: | http://hdl.handle.net/1834/22506 |
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dig-aquadocs-1834-225062021-07-07T02:37:49Z Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya Report on the Fourth FIDAWOG Workshop held at Kisumu, 16 to 20 August 1999 Asila, A.A. Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus Four fleets of hanging coefficients 0.2, 0.4, 0.6 and 0.8 were used to determine size selectivity and selection factors of Nile perch populations. There was a linear relationship between mesh size and modal length of capture. Positively skewed length frequency distributions were found for smaller mesh sizes with entanglement becoming more prominent in mesh sizes above 101 mm. Nets of 114 to 141 mm stretched mesh yielded higher economic returns than small meshes, the catch consisting of few largefish. Lake Victoria Fisheries Research Project Phase II LVFRP/TECH/99/07 2021-06-24T16:02:20Z 2021-06-24T16:02:20Z 1999 book_section http://hdl.handle.net/1834/22506 en LVFRP Technical Document http://www.lvfo.org/ application/pdf application/pdf 92-98 Lake Victoria Fisheries Research Project Jinja, Uganda http://aquaticcommons.org/id/eprint/4956 424 2011-09-29 15:39:53 4956 Lake Victoria Fisheries Organization |
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Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus |
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Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus Asila, A.A. Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
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Four fleets of hanging coefficients 0.2, 0.4, 0.6 and 0.8 were used to determine size selectivity and selection factors of Nile perch populations. There was a linear relationship between mesh size and modal length of capture. Positively skewed length frequency distributions were found for smaller mesh sizes with entanglement becoming more prominent in mesh sizes above 101 mm. Nets of 114 to 141 mm stretched mesh yielded higher economic returns than small meshes, the catch consisting of few largefish. |
format |
book_section |
topic_facet |
Biology Fisheries Information Management Africa Kenya stock assessment data collection data report Lates niloticus |
author |
Asila, A.A. |
author_facet |
Asila, A.A. |
author_sort |
Asila, A.A. |
title |
Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
title_short |
Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
title_full |
Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
title_fullStr |
Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
title_full_unstemmed |
Selectivity of gillnets for Nile perch, Lates niloticus (L.), in Lake Victoria, Kenya |
title_sort |
selectivity of gillnets for nile perch, lates niloticus (l.), in lake victoria, kenya |
publisher |
Lake Victoria Fisheries Research Project |
publishDate |
1999 |
url |
http://hdl.handle.net/1834/22506 |
work_keys_str_mv |
AT asilaaa selectivityofgillnetsfornileperchlatesniloticuslinlakevictoriakenya AT asilaaa reportonthefourthfidawogworkshopheldatkisumu16to20august1999 |
_version_ |
1756077639814086656 |