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Can back-calculated lengths based on otoliths measurements provide reliable estimates of Atlantic halibut(Hippoglossus hippoglossus)growth in the Gulf of Maine (U.S.A.)?

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Aquaculture and Fisheries 2017年第1期2卷 24-33页

作者： julia beaty Yong Chen Mid-Atlantic Fishery Management Council DoverDE 19904USA School of Marine Sciences University of MaineOronoME 04469USA

Atlantic halibut(Hippoglossus hippoglossus,Linnaeus,1758)are a data-poor stock within the waters of the United *** study evaluated the use of otolith measurements to back-calculate lengths of Atlantic halibut at previous ***-calculations have proven useful for estimating length at age and growth rates of other *** the best knowledge of the authors,this study is the first to document the use of this method for Atlantic *** back-calculations rely on a few key assumptions,such as proportionality of fish length and otolith length,which are not always *** study shows that backcalculations using the Fraser-Lee method can provide reasonable estimates of Atlantic halibut length at previous ages,especially when samples from young halibut are included to improve estimates of the intercept of the linear *** on back-calculated estimates,female and male halibut in the Gulf of Maine showed different growth rates after age *** was no evidence of changes in growth rates over an approximately 15 year time *** caught in the Gulf of Maine and on the neighboring Scotian Shelf showed some differences in growth rates;however,the results did not support strong conclusions about differences between the two regions as the direction of the differences was not consistent between the sexes and previous tagging studies have shown extensive movement between the two *** finding of reasonably accurate back-calculated lengths at previous ages is important for this data-poor species,as back-calculations increase the amount of information that can be obtained from otoliths.

关键词： Otolith Back-calculation Growth Gulf of Maine Hippoglossus hippoglossus

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