Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography
Bottom photography was found to be a more accurate method of censusing the commercial spider crab, Chionoecetes opilio, than trawling or sight counting from a submersible. Because of their highly aggregated distributions, estimating abundance of mature female crabs and immature crabs of both sexes w...
Published in: | Journal of the Fisheries Research Board of Canada |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1975
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f75-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-099 |
id |
crcansciencepubl:10.1139/f75-099 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f75-099 2024-03-03T08:43:36+00:00 Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography Miller, R. J. 1975 http://dx.doi.org/10.1139/f75-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-099 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 32, issue 6, page 761-768 ISSN 0015-296X journal-article 1975 crcansciencepubl https://doi.org/10.1139/f75-099 2024-02-07T10:53:32Z Bottom photography was found to be a more accurate method of censusing the commercial spider crab, Chionoecetes opilio, than trawling or sight counting from a submersible. Because of their highly aggregated distributions, estimating abundance of mature female crabs and immature crabs of both sexes was not practical by any method. The larger males (≥ 40 mm carapace width), including those of commercial value, approached a random distribution, however; and abundance estimates for four study areas ranged from 5.2 to 9.2 crabs/500 m 2 and from 2.2 to 4.2 kg live weight/500 m 2 . To permit results of exploratory fishing with traps to be converted to crab density and size of crab stocks available to a commercial fishery, a commercial crab trap was calibrated for "effective" area fished. The effective fishing area per trap averaged 4100 m 2 over four study areas. Article in Journal/Newspaper Chionoecetes opilio Canadian Science Publishing Journal of the Fisheries Research Board of Canada 32 6 761 768 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Bottom photography was found to be a more accurate method of censusing the commercial spider crab, Chionoecetes opilio, than trawling or sight counting from a submersible. Because of their highly aggregated distributions, estimating abundance of mature female crabs and immature crabs of both sexes was not practical by any method. The larger males (≥ 40 mm carapace width), including those of commercial value, approached a random distribution, however; and abundance estimates for four study areas ranged from 5.2 to 9.2 crabs/500 m 2 and from 2.2 to 4.2 kg live weight/500 m 2 . To permit results of exploratory fishing with traps to be converted to crab density and size of crab stocks available to a commercial fishery, a commercial crab trap was calibrated for "effective" area fished. The effective fishing area per trap averaged 4100 m 2 over four study areas. |
format |
Article in Journal/Newspaper |
author |
Miller, R. J. |
spellingShingle |
Miller, R. J. Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
author_facet |
Miller, R. J. |
author_sort |
Miller, R. J. |
title |
Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
title_short |
Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
title_full |
Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
title_fullStr |
Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
title_full_unstemmed |
Density of the Commercial Spider Crab, Chionoecetes opilio , and Calibration of Effective Area Fished Per Trap Using Bottom Photography |
title_sort |
density of the commercial spider crab, chionoecetes opilio , and calibration of effective area fished per trap using bottom photography |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/f75-099 http://www.nrcresearchpress.com/doi/pdf/10.1139/f75-099 |
genre |
Chionoecetes opilio |
genre_facet |
Chionoecetes opilio |
op_source |
Journal of the Fisheries Research Board of Canada volume 32, issue 6, page 761-768 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f75-099 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
32 |
container_issue |
6 |
container_start_page |
761 |
op_container_end_page |
768 |
_version_ |
1792499045103566848 |