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A refined method for estimating the number of earthworm chaetae in carnivore feces

机译：一种精致方法，用于估算肉食粪便中的蚯蚓Chaetae数量

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摘要

Generally, earthworm chaetae in feces are counted to estimate the contribution of earthworms to carnivore diets. In this study, we compared three methods: (1) a part of the wet fecal sample soaked in alcohol to attain 100% humidity was directly extracted, (2) after removing the extra alcohol from the wet sample maintained at 100% humidity was extracted, and (3) the entire wet fecal sample was homogenized and a random part was extracted to detect the number of earthworm chaetae in fecal samples by focusing on sensitivity, precision, and efficiency. The third method yielded the best results in terms of sensitivity and accuracy in detecting chaetae, but the second highest and moderate results in terms of efficiency and treatment time. This method was used to analyze the fecal samples of Japanese badgers and raccoon dogs. The size of earthworm chaetae recovered from the feces differed significantly between species and seasons, especially in spring, suggesting that the Japanese badgers and raccoon dogs may feed mainly on different earthworm families in spring. Therefore, a refined method was proposed in this study to quantitatively and efficiently detect earthworm chaetae in carnivore feces.
机译：通常，粪便中的蚯蚓Chaetae被计算为估计蚯蚓对食肉动物饮食的贡献。在这项研究中，我们比较了三种方法：（1）将浸出在醇中的湿法粪便样品的一部分直接提取，（2）从湿法中除去100％湿度下的湿法中浸出后。 （3）（3）将整个湿法样品均匀化，随机部分通过专注于灵敏度，精度和效率来检测粪便样品中蚯蚓Chaetae的数量。第三种方法在检测chaetae的敏感性和准确性方面产生了最佳结果，但在效率和治疗时间方面的第二个最高和中等结果。该方法用于分析日本獾和浣熊的粪便样本。从粪便中恢复的蚯蚓chaetae的大小在物种和季节之间有显着不同，特别是在春天，表明日本獾和浣熊犬可能主要在春天的不同蚯蚓家庭上饲养。因此，本研究提出了一种精制的方法，以定量有效地检测食肉动物粪便中的蚯蚓Chaetae。

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  • 来源
    《Ecological research》 |2021年第4期|617-628|共12页
  • 作者

    Tsukada Hideharu; Nishikawa Yuka; Shimada Haruka; Hijikata Koji; Minami Masato;

  • 作者单位

    Azabu Univ Sch Vet Med Dept Anim Sci & Biotechnol Lab Wildlife Ecol & Conservat Sagamihara Kanagawa Japan;

    Azabu Univ Sch Vet Med Dept Anim Sci & Biotechnol Lab Wildlife Ecol & Conservat Sagamihara Kanagawa Japan;

    Azabu Univ Sch Vet Med Dept Anim Sci & Biotechnol Lab Wildlife Ecol & Conservat Sagamihara Kanagawa Japan;

    Azabu Univ Sch Vet Med Dept Anim Sci & Biotechnol Lab Wildlife Ecol & Conservat Sagamihara Kanagawa Japan;

    Azabu Univ Sch Vet Med Dept Anim Sci & Biotechnol Lab Wildlife Ecol & Conservat Sagamihara Kanagawa Japan;

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  • 正文语种 eng
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  • 关键词

    diet; fecal analysis; Meles anakuma; methodology; Nyctereutes procyonoides viverrinus;

    机译：饮食;粪便分析;Meles Anakuma;方法论;Nyctereutes Procynoides Viverrinus;

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