Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys
Six small Newfoundland lakes were fished with gillnets over a 3–6 yr period in a manner typical of standard lake surveys where surveyors have a fixed amount of gear available, but lake size varies. Catch and effort data for brook trout (Salvelinus fontinalis) were examined for the purpose of selecti...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1989
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Online Access: | http://dx.doi.org/10.1139/f89-132 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-132 |
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crcansciencepubl:10.1139/f89-132 2023-12-17T10:44:52+01:00 Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys Ryan, P. M. Kerekes, J. J. 1989 http://dx.doi.org/10.1139/f89-132 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-132 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue 6, page 1022-1025 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1989 crcansciencepubl https://doi.org/10.1139/f89-132 2023-11-19T13:38:46Z Six small Newfoundland lakes were fished with gillnets over a 3–6 yr period in a manner typical of standard lake surveys where surveyors have a fixed amount of gear available, but lake size varies. Catch and effort data for brook trout (Salvelinus fontinalis) were examined for the purpose of selecting an appropriate measure of the relative abundance of trout. Fishing effort was not a function of lake area but fishing intensity or fishing effort per unit area varied inversely with lake area. Brook trout yield (kilograms per hectare) was positively related to fishing intensity Catch per unit effort (kilograms) of brook trout was inversely related to fishing intensity. Methods are suggested to correct for the bias in catch data resulting from variable fishing intensity during lake surveys and improve the recognition of differences in relative fish abundance. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 46 6 1022 1025 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Ryan, P. M. Kerekes, J. J. Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Six small Newfoundland lakes were fished with gillnets over a 3–6 yr period in a manner typical of standard lake surveys where surveyors have a fixed amount of gear available, but lake size varies. Catch and effort data for brook trout (Salvelinus fontinalis) were examined for the purpose of selecting an appropriate measure of the relative abundance of trout. Fishing effort was not a function of lake area but fishing intensity or fishing effort per unit area varied inversely with lake area. Brook trout yield (kilograms per hectare) was positively related to fishing intensity Catch per unit effort (kilograms) of brook trout was inversely related to fishing intensity. Methods are suggested to correct for the bias in catch data resulting from variable fishing intensity during lake surveys and improve the recognition of differences in relative fish abundance. |
format |
Article in Journal/Newspaper |
author |
Ryan, P. M. Kerekes, J. J. |
author_facet |
Ryan, P. M. Kerekes, J. J. |
author_sort |
Ryan, P. M. |
title |
Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
title_short |
Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
title_full |
Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
title_fullStr |
Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
title_full_unstemmed |
Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys |
title_sort |
correction of relative fish abundance estimates from catch data for variable fishing intensity during lake surveys |
publisher |
Canadian Science Publishing |
publishDate |
1989 |
url |
http://dx.doi.org/10.1139/f89-132 http://www.nrcresearchpress.com/doi/pdf/10.1139/f89-132 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 46, issue 6, page 1022-1025 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f89-132 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
46 |
container_issue |
6 |
container_start_page |
1022 |
op_container_end_page |
1025 |
_version_ |
1785564297497149440 |