A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi
Accurate classification of maturity status and estimation of size at 50% maturity for male crabs are important to the management of North Pacific crab stocks, which form the basis of several economically valuable fisheries. We demonstrate a straightforward maturity classification approach applied to...
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Canadian Science Publishing
2022
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Online Access: | http://dx.doi.org/10.1139/facets-2021-0061 https://facetsjournal.com/doi/pdf/10.1139/facets-2021-0061 |
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crcansciencepubl:10.1139/facets-2021-0061 2023-12-17T10:28:08+01:00 A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi Richar, Jonathan I. Foy, Robert J. Love, Tanzy 2022 http://dx.doi.org/10.1139/facets-2021-0061 https://facetsjournal.com/doi/pdf/10.1139/facets-2021-0061 en eng Canadian Science Publishing FACETS volume 7, page 1598-1616 ISSN 2371-1671 Multidisciplinary journal-article 2022 crcansciencepubl https://doi.org/10.1139/facets-2021-0061 2023-11-19T13:38:25Z Accurate classification of maturity status and estimation of size at 50% maturity for male crabs are important to the management of North Pacific crab stocks, which form the basis of several economically valuable fisheries. We demonstrate a straightforward maturity classification approach applied to male Tanner crabs ( Chionoecetes bairdi), based on the use of log-transformed chela height distributions calculated via kernel density functions. The linear equation defining the relationship between the minima of these chela height distributions, and the midpoint of the corresponding carapace width bins is then used to estimate the incidence of maturity by size group across the population. We demonstrate the performance of this approach relative to two other currently applied methodologies. Finally, we apply this method to assess annual size at 50% maturity in eastern Bering Sea male Tanner crabs, and spatiotemporal trends in this parameter. We demonstrate the existence of high interannual and spatial variability in this population metric and find evidence of a decline in size at maturity in the western stock. Article in Journal/Newspaper Bering Sea Chionoecetes bairdi Tanner crab Canadian Science Publishing (via Crossref) Bering Sea Pacific FACETS 7 1598 1616 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Richar, Jonathan I. Foy, Robert J. A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
topic_facet |
Multidisciplinary |
description |
Accurate classification of maturity status and estimation of size at 50% maturity for male crabs are important to the management of North Pacific crab stocks, which form the basis of several economically valuable fisheries. We demonstrate a straightforward maturity classification approach applied to male Tanner crabs ( Chionoecetes bairdi), based on the use of log-transformed chela height distributions calculated via kernel density functions. The linear equation defining the relationship between the minima of these chela height distributions, and the midpoint of the corresponding carapace width bins is then used to estimate the incidence of maturity by size group across the population. We demonstrate the performance of this approach relative to two other currently applied methodologies. Finally, we apply this method to assess annual size at 50% maturity in eastern Bering Sea male Tanner crabs, and spatiotemporal trends in this parameter. We demonstrate the existence of high interannual and spatial variability in this population metric and find evidence of a decline in size at maturity in the western stock. |
author2 |
Love, Tanzy |
format |
Article in Journal/Newspaper |
author |
Richar, Jonathan I. Foy, Robert J. |
author_facet |
Richar, Jonathan I. Foy, Robert J. |
author_sort |
Richar, Jonathan I. |
title |
A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
title_short |
A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
title_full |
A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
title_fullStr |
A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
title_full_unstemmed |
A novel morphometry-based method for assessing maturity in male Tanner crab, Chionoecetes bairdi |
title_sort |
novel morphometry-based method for assessing maturity in male tanner crab, chionoecetes bairdi |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/facets-2021-0061 https://facetsjournal.com/doi/pdf/10.1139/facets-2021-0061 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Chionoecetes bairdi Tanner crab |
genre_facet |
Bering Sea Chionoecetes bairdi Tanner crab |
op_source |
FACETS volume 7, page 1598-1616 ISSN 2371-1671 |
op_doi |
https://doi.org/10.1139/facets-2021-0061 |
container_title |
FACETS |
container_volume |
7 |
container_start_page |
1598 |
op_container_end_page |
1616 |
_version_ |
1785580170814423040 |