Killer whale call repertoires can provide information on social connections among groups and populations. Killer whales in Iceland and Norway exhibit similar ecology and behavior, are genetically related, and are presumed to have been in contact before the collapse of the Atlanto‐Scandian herring stock in the 1960s. However, photo‐identification suggests no recent movements between Iceland and Norway but regular movement between Iceland and Shetland. Acoustic recordings collected between 2005 and 2016 in Iceland, Norway, and Shetland were used to undertake a comprehensive comparison of call repertoires of Northeast Atlantic killer whales. Measurements of time and frequency parameters of calls from Iceland (n = 4,037) and Norway (n = 1,715) largely overlapped in distribution, and a discriminant function analysis had low correct classification rate. No call type matches were confirmed between Iceland and Norway or Shetland and Norway. Three call types matched between Iceland and Shetland. Therefore, this study suggests overall similarities in time and frequency parameters but some divergence in call type repertoires. This argues against presumed past contact between Icelandic and Norwegian killer whales and suggests that they may not have been one completely mixed population.

中文翻译：

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东北大西洋虎鲸（Orcinus orca）定型的电话曲目比较

虎鲸电话汇辑可以提供有关群体和人群之间的社会联系的信息。冰岛和挪威的虎鲸表现出相似的生态和行为，具有遗传相关性，并被认为在1960年代Atlanto-Scandian鲱鱼种群灭绝之前就已经接触过。但是，通过照片识别，冰岛和挪威之间没有最近的动静，但冰岛和设得兰群岛之间却有规律的运动。使用2005年至2016年在冰岛，挪威和设得兰群岛收集的声音记录，对东北大西洋虎鲸的呼叫清单进行了全面比较。冰岛（n = 4,037）和挪威（n= 1,715）的分布在很大程度上重叠，并且判别函数分析的正确分类率低。冰岛和挪威或设得兰群岛和挪威之间未确认通话类型匹配。冰岛和设得兰群岛之间匹配三种呼叫类型。因此，这项研究表明，时间和频率参数总体上相似，但通话类型的曲目存在一些差异。这与冰岛和挪威的虎鲸之间过去的假定接触相抵触，并表明它们可能不是一个完全混合的种群。