Graded calls of the smallest terrestrial mammal, the Etruscan shrew, living in a closed habitat

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2024-11-01 DOI:10.1016/j.isci.2024.111297

Alexandra Langehennig-Peristenidou , Felix Felmy , Marina Scheumann

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Abstract

Graded call types predominate in species inhabiting open habitats with complex social systems, whereas discrete call types predominate in species with simple social systems living in closed habitats. This study aims to establish the vocal repertoire of Etruscan shrews, the smallest terrestrial mammal, which lives in pairs in closed habitats. Through various behavioral experiments, vocalizations were recorded and analyzed using unsupervised soft clustering, identifying four call types, one of which exhibited gradation. These calls were present in both pups and adults, showing age-related acoustic differences. One call type was observed during socio-positive behavior, with higher call rates during female-male interactions, while the others occurred during socio-negative contexts, with higher call rates for animals housed in pairs. Delivering the first detailed insight into Etruscan shrew vocal behavior, we demonstrated that the smallest terrestrial mammal possesses graded and discrete call types, regardless of its social system and habitat.

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生活在封闭栖息地的最小陆生哺乳动物伊特鲁里亚鼩的分级叫声

在社会系统复杂的开放生境中，分级的叫声类型占主导地位，而在社会系统简单的封闭生境中，离散的叫声类型占主导地位。伊特鲁里亚鼩是最小的陆生哺乳动物，成对生活在封闭的栖息地，本研究旨在建立它们的发声曲目。通过各种行为实验，我们记录了鼩鼱的发声，并使用无监督软聚类法进行了分析，确定了四种叫声类型，其中一种呈现出渐变性。这些叫声出现在幼体和成体中，并显示出与年龄相关的声学差异。其中一种叫声出现在社会积极行为中，雌性与雄性互动时叫声较高；其他叫声出现在社会消极行为中，成对饲养的动物叫声较高。我们首次详细了解了伊特鲁里亚鼩鼱的发声行为，证明了这种最小的陆生哺乳动物拥有分级和离散的叫声类型，与其社会系统和栖息地无关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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