Age, growth, and maturity of the whitebrow skate, Bathyraja minispinosa, from the eastern Bering Sea

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Ainsley, S. M., Ebert, D. A., & Cailliet, G. M. (2011). Age, growth, and maturity of the whitebrow skate, Bathyraja minispinosa, from the eastern Bering Sea. ICES Journal of Marine Science, 68(7), 1426-1434. doi:10.1093/icesjms/fsr072
Metadata
TitleAge, growth, and maturity of the whitebrow skate, Bathyraja minispinosa, from the eastern Bering Sea
AuthorsS. Ainsley, D. Ebert, G. Cailliet
AbstractSkates are a common bycatch in groundfish fisheries in the Bering Sea; however, their life-history characteristics are not well known. The study is the first to investigate the age, growth, and age at maturity of Bathyraja minispinosa. Ages were estimated using sectioned vertebrae and several growth models were compared. The Gompertz model was the best fit and no significant differences were detected between sexes for any model. The maximum age estimated was 37 years, and parameter estimates generated from the three-parameter von Bertalanffy model were k 0.02 year -1 and L∞ 146.9 cm total length (TL). Males reached their size at 50 maturity larger than females (70.1 and 67.4 cm, respectively), but no significant differences in the estimated size or age at maturity were found. Whereas B. minispinosa is smaller than many skate species in the eastern Bering Sea, it has a considerably longer estimated lifespan, indicating that size may not be a reliable method of estimating the vulnerability of a rajid species to population declines in the eastern North Pacific. © 2011 International Council for the Exploration of the Sea.
JournalICES Journal of Marine Science
Date2011
Volume68
Issue7
Start page1426
End page1434
ISSN1054-3139
Subjectsage at maturity, age structure, bycatch, fish culture, growth rate, life history, mariculture, population decline, von Bertalanffy equation, vulnerability, Bering Sea, Pacific Ocean, Bathyraja minispinosa, Rajidae
NoteCited By (since 1996):1, Fish and Fisheries, CODEN: ICESE

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