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Genetics, recruitment, and migration patterns of Arctic cisco (Coregonus autumnalis) in the Colville River, Alaska, and Mackenzie River, Canada

机译:加拿大阿拉斯加科尔维尔河和麦肯齐河的北极思科(Coregonus autumnalis)的遗传,募集和迁移模式

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摘要

Arctic cisco Coregonus autumnalis have a complex anadromous life history, many aspects of which remain poorly understood. Some life history traits of Arctic cisco from the Colville River, Alaska, and Mackenzie River basin, Canada, were investigated using molecular genetics, harvest data, and otolith microchemistry. The Mackenzie hypothesis, which suggests that Arctic cisco found in Alaskan waters originate from the Mackenzie River system, was tested using 11 microsatellite loci and a single mitochondrial DNA gene. No genetic differentiation was found among sample collections from the Colville River and the Mackenzie River system using molecular markers (P>0.19 in all comparisons). Model-based clustering methods also supported genetic admixture between sample collections from the Colville River and Mackenzie River basin. A reanalysis of recruitment patterns to Alaska, which included data from recent warm periods and suspected changes in atmospheric circulation patterns, still finds that recruitment is correlated to wind conditions. Otolith microchemistry (Sr/Ca ratios) confirmed repeated, annual movements of Arctic cisco between low-salinity habitats in winter and marine waters in summer.
机译:北极思科Coregonus autumnalis具有复杂的异常生活史,对其许多方面仍然知之甚少。使用分子遗传学,收获数据和耳石微化学研究了加拿大科尔斯河,阿拉斯加和麦肯奇河流域的北极思科的一些生活史特征。 Mackenzie假说表明在阿拉斯加水域发现的北极思科起源于Mackenzie河系,并使用11个微卫星基因座和单个线粒体DNA基因进行了测试。使用分子标记在科尔维尔河和麦肯齐河系统的样本中未发现遗传分化(所有比较中,P> 0.19)。基于模型的聚类方法还支持了科尔维尔河和麦肯齐河流域的样本集合之间的遗传混合。对阿拉斯加的募集模式进行了重新分析,其中包括来自最近温暖期的数据以及怀疑的大气环流模式变化,但仍然发现该募集与风况相关。耳石微化学(Sr / Ca比值)证实了冬季低盐度生境和夏季海水之间反复出现的北极思科年度运动。

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