Moving far from water: unusual dispersal movement of the water opossum (Chironectes minimus: Didelphimorphia, Didelphidae) in central Brazil

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-01-01 DOI:10.1590/1676-0611-bn-2021-1301

A. Mendonça, E. M. Vieira

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引用次数: 0

Abstract

Abstract: Unusual movements of an animal can potentially represent a dispersal event. A higher frequency of young males dispersing is a pattern observed for most part of polygynous or promiscuous mammals with these dispersion events occurring, mainly, before or at the beginning of the breeding season. The water opossum (Chironectes minimus), the only marsupial adapted for semi-aquatic life, occurs from Mexico to Argentina and it has been mostly described as a sensitive species to river and riparian vegetation degradation, occurring exclusively near water curses. Here we describe the first record of long-distance movement of a water opossum not associated with riverine vegetation through dry land. We captured a healthy adult male of C. minimus in July 2012 beside of a highway (DF-001) located 1,100 m from nearest gallery forest in the Federal District. The region is characterized by urban and suburban residential, small fragments of typical savanna and degraded gallery forests. Our unique record could be an event of dispersion through degraded dry lands as observed for other semi-aquatic mammals and also suggests that this species is more resistant to anthropogenic disturbances than previously described. Also, information about dispersal patterns of water opossum is scarce and may contributes to a deeper understanding of ecological requirements of this species.

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远离水:巴西中部水负鼠(Chironectes minimus: didelphimorphiia, Didelphidae)不寻常的扩散运动

摘要:动物的异常运动可能潜在地代表了一个分散事件。在大多数一夫多妻制或滥交的哺乳动物中，年轻雄性分散的频率较高，这些分散事件主要发生在繁殖季节之前或开始时。水负鼠(Chironectes minimus)是唯一一种适应半水生生活的有袋动物，分布在墨西哥到阿根廷，它被描述为一种对河流和河岸植被退化敏感的物种，只发生在水塘附近。在这里，我们描述了与河流植被无关的水负鼠通过旱地长距离运动的第一个记录。2012年7月，我们在距离联邦区最近的廊道森林1100米的高速公路(DF-001)旁捕获了一只健康成年小绒螯鼠。该地区的特点是城市和郊区的住宅，典型的稀树草原和退化的廊道森林的小碎片。我们独特的记录可能是在退化的干旱土地上分散的事件，就像在其他半水生哺乳动物中观察到的那样，也表明这个物种比以前描述的更能抵抗人为干扰。此外，关于水负鼠的传播模式的信息很少，这可能有助于更深入地了解该物种的生态需求。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.