Muskrat (Ondatra zibethicus) predation on unionid mussels in the Salmon and Little Salmon rivers in northern New York

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-16 DOI:10.1002/rra.4368

John E. Cooper

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引用次数: 0

Abstract

Muskrat (Ondatra zibethicus) predation on unionid mussels has been documented since the late 1800s. More recent studies have examined size‐specific predation and potential effects of predation on mussel populations. This study was part of a larger endeavor that examined the effects of dam removal in the Salmon and Little Salmon rivers in northern New York. Muskrat middens were searched for from 2005 through 2012 and all mussel shells were identified, measured, and evaluated for evidence of muskrat predation. Ten species of consumed mussels were collected from 37 middens. Three species of living mussels that were in low abundance were not found in middens. Distribution of middens was uneven in both rivers and few middens were used in more than 1 year. Muskrats did not consume mussels <37 mm shell length in the Salmon River (SR) and <28 mm in the Little Salmon River (LSR). Shell length distribution of living mussels was similar to that of mussels in middens. Shell length of living SR mussels (based on mean ranks) were significantly longer than living mussels in the LSR as were consumed mussels. Size‐selection may be indicated for Elliptio complanata and Lampsilis radiata but relative abundance might also be a factor. Dry empty shell weight and thickness were not significantly correlated to percent predation marks. The muskrat population in these rivers could be small as few middens were used in more than 1 year and there was no evidence of muskrat trapping. If so, muskrat predation would have a limited effect on the unionid population.

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麝鼠（Ondatra zibethicus）捕食纽约州北部鲑鱼河和小鲑鱼河中的联盟贻贝

麝鼠（Ondatra zibethicus）对贻贝的捕食早在 19 世纪末就有记载。最近的研究考察了捕食贻贝的大小特征以及捕食对贻贝种群的潜在影响。这项研究是纽约州北部鲑鱼河和小鲑鱼河大坝拆除影响研究的一部分。从 2005 年到 2012 年，我们一直在寻找麝鼠的栖息地，并对所有贻贝壳进行鉴定、测量和评估，以寻找麝鼠捕食的证据。从 37 个贻贝坑中收集了 10 种被捕食的贻贝。在贻贝坑中没有发现三种数量较少的生活贻贝。两条河流中的贻贝窝分布不均，很少有贻贝窝被使用超过一年。在鲑鱼河（SR）和小鲑鱼河（LSR），麝鼠没有吃掉贝壳长度分别为 37 毫米和 28 毫米的贻贝。生活贻贝的贝壳长度分布与贻贝堆中的贝壳长度分布相似。活体SR贻贝的贝壳长度（基于平均等级）明显长于活体LSR贻贝，消耗掉的贻贝也是如此。对于Elliptio complanata和Lampsilis radiata来说，尺寸选择可能是一个因素，但相对丰度也可能是一个因素。空壳干重和厚度与捕食痕迹的百分比没有明显的相关性。这些河流中的麝鼠数量可能很少，因为很少有人在一年以上的时间里使用过麝鼠标本，而且也没有证据表明曾经诱捕过麝鼠。如果是这样的话，麝鼠捕食对乌贼数量的影响将是有限的。

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

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.