Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort
An experiment was conducted to study trap selectivity for male snow crab (Chionoecetes opilio) in St. Mary's Bay, Newfoundland. The finishing effort of large-mesh commercial traps and small-mesh control traps was not equal because two commercial traps were fished for every control trap. We show...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1993
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Online Access: | http://dx.doi.org/10.1139/f93-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-273 |
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crcansciencepubl:10.1139/f93-273 2024-04-28T08:15:55+00:00 Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort Xu, Xucai Millar, Russell B. 1993 http://dx.doi.org/10.1139/f93-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-273 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 11, page 2485-2490 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1993 crcansciencepubl https://doi.org/10.1139/f93-273 2024-04-02T06:55:54Z An experiment was conducted to study trap selectivity for male snow crab (Chionoecetes opilio) in St. Mary's Bay, Newfoundland. The finishing effort of large-mesh commercial traps and small-mesh control traps was not equal because two commercial traps were fished for every control trap. We show how the SELECT (Share Each Length's Catch Total) method extends to this situation and, more generally, to selectivity trials in which catches are sampled in unequal proportion. Application to the crab data showed that a good fit was provided by the logistic selection curve under the assumption of unequal fishing efficiencies of commercial and control traps. The carapace widths at the retention probabilities of 0.25, 0.50, and 0.75 were estimated to be 86.4, 94.6, and 102.9 mm, respectively, and the retention probability at the minimum legal size of 95 mm was estimated to be 0.51. The commercial traps had almost twice the fishing efficiency of the control traps and consequently caught more legal-sized crabs per trap. Article in Journal/Newspaper Chionoecetes opilio Newfoundland Snow crab Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 50 11 2485 2490 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Xu, Xucai Millar, Russell B. Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
An experiment was conducted to study trap selectivity for male snow crab (Chionoecetes opilio) in St. Mary's Bay, Newfoundland. The finishing effort of large-mesh commercial traps and small-mesh control traps was not equal because two commercial traps were fished for every control trap. We show how the SELECT (Share Each Length's Catch Total) method extends to this situation and, more generally, to selectivity trials in which catches are sampled in unequal proportion. Application to the crab data showed that a good fit was provided by the logistic selection curve under the assumption of unequal fishing efficiencies of commercial and control traps. The carapace widths at the retention probabilities of 0.25, 0.50, and 0.75 were estimated to be 86.4, 94.6, and 102.9 mm, respectively, and the retention probability at the minimum legal size of 95 mm was estimated to be 0.51. The commercial traps had almost twice the fishing efficiency of the control traps and consequently caught more legal-sized crabs per trap. |
format |
Article in Journal/Newspaper |
author |
Xu, Xucai Millar, Russell B. |
author_facet |
Xu, Xucai Millar, Russell B. |
author_sort |
Xu, Xucai |
title |
Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
title_short |
Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
title_full |
Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
title_fullStr |
Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
title_full_unstemmed |
Estimation of Trap Selectivity for Male Snow Crab ( Chionoecetes opilio ) Using the SELECT Modeling Approach with Unequal Sampling Effort |
title_sort |
estimation of trap selectivity for male snow crab ( chionoecetes opilio ) using the select modeling approach with unequal sampling effort |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/f93-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-273 |
genre |
Chionoecetes opilio Newfoundland Snow crab |
genre_facet |
Chionoecetes opilio Newfoundland Snow crab |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 11, page 2485-2490 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f93-273 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
50 |
container_issue |
11 |
container_start_page |
2485 |
op_container_end_page |
2490 |
_version_ |
1797581262996635648 |