ABSTRACT Genypterus blacodes, in terms of its fishing history and local economic importance, is an emblematic species harvested in Chilean Patagonia (41°00’–57°00’S). Most of the current fisheries and biological knowledge of this species come from the open ocean, whereas information about the species in fjords and inner channels is fragmentary. In 2018, two research surveys targeting G. blacodes were conducted in the fjords and inner channels of Chilean Patagonia. A total of 253 pairs of sagittal otoliths were sampled at three different localities, and their contours were modelled using wavelet analysis as a tool for stock discrimination. Contours were compared using canonical analysis, and classification was performed using linear discriminant and Random Forest analyses. The results indicated that the wavelet method is efficient in modelling otolith contours, and the discriminant analyses showed differences among fishing grounds across the latitudinal gradient, thus confirming the hypothesis that G. blacodes conform to at least two separate stock units in Chilean Patagonia. Fishing grounds that were closer in space showed higher levels of misclassification. The discussion focuses on how environmental variables and the geography of fjords shape stock differences and how this information can be used for the sustainable management of G. blacodes.

中文翻译：

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耳石形状作为智利巴塔哥尼亚峡湾中 ling（Genypterus blacodes）的种群鉴别工具

摘要 Genypterus blacodes 就其捕捞历史和当地经济重要性而言，是在智利巴塔哥尼亚 (41°00'–57°00'S) 收获的标志性物种。目前该物种的大部分渔业和生物知识来自公海，而有关峡湾和内河道物种的信息是零碎的。2018 年，在智利巴塔哥尼亚的峡湾和内河道进行了两项针对 G. blacodes 的研究调查。在三个不同的位置对总共 253 对矢状耳石进行了采样，并使用小波分析作为种群辨别工具对它们的轮廓进行建模。使用规范分析比较轮廓，使用线性判别和随机森林分析进行分类。结果表明小波方法在模拟耳石轮廓方面是有效的，判别分析显示跨纬度梯度的渔场之间存在差异，从而证实了 G. blacodes 符合智利巴塔哥尼亚至少两个独立种群单位的假设。在太空中更近的渔场显示出更高的错误分类水平。讨论的重点是环境变量和峡湾地理如何影响种群差异，以及如何将这些信息用于 G. blacodes 的可持续管理。在太空中更近的渔场显示出更高的错误分类水平。讨论的重点是环境变量和峡湾地理如何影响种群差异，以及如何将这些信息用于 G. blacodes 的可持续管理。在太空中更近的渔场显示出更高的错误分类水平。讨论的重点是环境变量和峡湾地理如何影响种群差异，以及如何将这些信息用于 G. blacodes 的可持续管理。