日本水鼩的同位素饮食分析及其体毛样本的利用价值

IF 0.8 4区 生物学 Q3 ZOOLOGY Mammal Study Pub Date : 2022-10-26 DOI:10.3106/ms2022-0021
Nao Shiozuka, Izumi Katano, Toko Kanzaki, Ryota Kikuchi, Nozomu J. Sato, R. Nakashita, Seiya Kudo, H. Ikeda, N. Azuma
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引用次数: 1

摘要

摘要水鼩是日本的濒危物种。尽管立即采取保护行动是必要的,但关于该物种的详细信息还不够。我们将通过鸭嘴兽消化内容物分析获得的饮食趋势与通过非侵入性体毛和侵入性肌肉的稳定同位素分析(δ13C,δ15N,‰)获得的趋势进行了比较,以阐明它们的饮食并评估饮食稳定同位素分析的有用性。2013年至2016年,除积雪季节外,我们在青森县的三条溪流中捕获了20只鼩。消化内容物分析表明,水鼩主要以水生昆虫为食,淡水蟹、鱼类和陆生昆虫也作为日粮。稳定同位素分析的δ13C值在肌肉和体毛之间没有显著差异,表明水生无脊椎动物和鱼类的主要饮食。δ15N值在肌肉中显著降低,表明水鼩的营养地位与鱼类相似。在同位素混合模型中,陆地无脊椎动物的贡献小于0.35,只有两个个体表现出最高的陆地无脊椎动物比率(>0.5)和最低的水生无脊椎动物比率。这项研究还表明,背部任何部位的体毛都足以用于膳食稳定同位素分析。
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Isotopic Diet Analysis of the Japanese Water Shrew Chimarrogale platycephala to Estimate Their Feeding Habits and the Usefulness of Body Hair Samples
Abstract. The water shrew Chimarrogale platycephala is an endangered species in Japan. Although immediate conservation actions are necessary, detailed information on this species is inadequate. We compared dietary trends obtained via C. platycephala digestive contents analysis with those through stable isotope analysis (δ13C, δ15N, ‰) of non-invasive body hair and invasive muscles to elucidate their diet and evaluate usefulness of the dietary stable isotope analysis. We captured 20 shrews from three streams in Aomori Prefecture from 2013 to 2016 barring snow accumulation seasons. The digestive contents analysis showed that water shrews mainly fed on aquatic insects, whereas freshwater crabs, fishes, and terrestrial insects were also observed as diets. δ13C values from the stable isotope analysis were not significantly different between muscles and body hair and indicated a primary diet of aquatic invertebrates and fishes. δ15N values were significantly lower in muscles and indicated a similar trophic position of water shrews to fishes. In the isotope mixing model, the contribution of terrestrial invertebrates was less than 0.35 except for two individuals that showed the highest terrestrial invertebrate ratio (> 0.5) and the lowest aquatic invertebrate ratio. This study also demonstrated that body hair from any part of the back was sufficiently useful for dietary stable isotope analysis.
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来源期刊
Mammal Study
Mammal Study ZOOLOGY-
CiteScore
1.70
自引率
20.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: Mammal Study is the official journal of the Mammal Society of Japan. It publishes original articles, short communications, and reviews on all aspects of mammalogy quarterly, written in English.
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