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...

Full description

Bibliographic Details
Published in:FACETS
Main Authors: Richar, Jonathan I., Foy, Robert J.
Other Authors: Love, Tanzy
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 2022
Subjects:
Online Access:http://dx.doi.org/10.1139/facets-2021-0061
https://facetsjournal.com/doi/pdf/10.1139/facets-2021-0061
id crcansciencepubl:10.1139/facets-2021-0061
record_format openpolar
spelling 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
institution Open Polar
collection 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