Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex
Abstract Objective Some graylings Thymallus spp. possess an elongated dorsal fin and other morphological traits that can be sexually dimorphic, as demonstrated in the European Grayling T. thymallu s. North American Arctic Grayling T. arcticus are assumed to follow these trends, but decisive evidence...
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Online Access: | http://dx.doi.org/10.1002/nafm.10956 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10956 |
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crwiley:10.1002/nafm.10956 2024-06-02T08:00:11+00:00 Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex Samuel, William T. Yancy, Lauren E. Hinkle, Elizabeth G. Falke, Jeffrey A. National Science Foundation 2024 http://dx.doi.org/10.1002/nafm.10956 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10956 en eng Wiley http://creativecommons.org/licenses/by/4.0/ North American Journal of Fisheries Management volume 44, issue 1, page 70-78 ISSN 0275-5947 1548-8675 journal-article 2024 crwiley https://doi.org/10.1002/nafm.10956 2024-05-03T10:41:52Z Abstract Objective Some graylings Thymallus spp. possess an elongated dorsal fin and other morphological traits that can be sexually dimorphic, as demonstrated in the European Grayling T. thymallu s. North American Arctic Grayling T. arcticus are assumed to follow these trends, but decisive evidence is lacking. This study aimed to determine whether sexually dimorphic characteristics, including posterior dorsal height, can be used to accurately predict the sex of Arctic Grayling in Interior Alaska. Methods We used computer imaging software to measure 22 morphometrics on 97 Arctic Grayling of known sex from streams in Interior Alaska, and we developed a set of binomial models to evaluate the validity of morphometrics as predictors of Arctic Grayling sex. Result Posterior dorsal height was a reasonably accurate predictor of sex (~90% accurate at fork lengths ≥300 mm), although models containing additional morphometrics were more accurate (100% accuracy at fork lengths ≥250 mm). Conclusion This study presents an affordable, noninvasive, and replicable method for nonlethal determination of Arctic Grayling sex by using digital images from the field, with potential application to other salmonids. Article in Journal/Newspaper Arctic grayling Arctic Alaska Wiley Online Library Arctic North American Journal of Fisheries Management |
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Wiley Online Library |
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English |
description |
Abstract Objective Some graylings Thymallus spp. possess an elongated dorsal fin and other morphological traits that can be sexually dimorphic, as demonstrated in the European Grayling T. thymallu s. North American Arctic Grayling T. arcticus are assumed to follow these trends, but decisive evidence is lacking. This study aimed to determine whether sexually dimorphic characteristics, including posterior dorsal height, can be used to accurately predict the sex of Arctic Grayling in Interior Alaska. Methods We used computer imaging software to measure 22 morphometrics on 97 Arctic Grayling of known sex from streams in Interior Alaska, and we developed a set of binomial models to evaluate the validity of morphometrics as predictors of Arctic Grayling sex. Result Posterior dorsal height was a reasonably accurate predictor of sex (~90% accurate at fork lengths ≥300 mm), although models containing additional morphometrics were more accurate (100% accuracy at fork lengths ≥250 mm). Conclusion This study presents an affordable, noninvasive, and replicable method for nonlethal determination of Arctic Grayling sex by using digital images from the field, with potential application to other salmonids. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Samuel, William T. Yancy, Lauren E. Hinkle, Elizabeth G. Falke, Jeffrey A. |
spellingShingle |
Samuel, William T. Yancy, Lauren E. Hinkle, Elizabeth G. Falke, Jeffrey A. Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
author_facet |
Samuel, William T. Yancy, Lauren E. Hinkle, Elizabeth G. Falke, Jeffrey A. |
author_sort |
Samuel, William T. |
title |
Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
title_short |
Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
title_full |
Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
title_fullStr |
Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
title_full_unstemmed |
Validating morphometrics as a nonlethal tool to determine Arctic Grayling sex |
title_sort |
validating morphometrics as a nonlethal tool to determine arctic grayling sex |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/nafm.10956 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1002/nafm.10956 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic grayling Arctic Alaska |
genre_facet |
Arctic grayling Arctic Alaska |
op_source |
North American Journal of Fisheries Management volume 44, issue 1, page 70-78 ISSN 0275-5947 1548-8675 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/nafm.10956 |
container_title |
North American Journal of Fisheries Management |
_version_ |
1800744180568293376 |