著者
Keisuke Onuki
出版者
Carcinological Society of Japan
雑誌
Crustacean Research (ISSN:02873478)
巻号頁・発行日
vol.50, pp.33-39, 2021-04-01 (Released:2021-04-01)
参考文献数
23

The distribution of the invasive freshwater shrimp, Neocaridina davidi, in a spring-fed stream at Kunitachi, Tokyo, Japan, was investigated in relation to the stream’s environmental parameters. Compared to previous studies, the population density of N. davidi was found to be remarkably high (up to 315 ind./m2). The increase in population density is likely because the water temperature in the spring-fed stream remains 17–20°C in the winter, prolonging the period during which the shrimps can spawn. Generalized linear mixed models showed that adult shrimps were more abundant in areas with high emergent plant coverage. In contrast, juveniles were more abundant in areas with low current velocity. These results provide essential clues to the interspecific relationships between N. davidi and native spring organisms that inhabit the same physical environments.

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ラボの後輩の論文が出版されていた。 湧水河川におけるシナヌマエビの利用ハビタットを調べた研究。湧水河川では安定した水温によって繁殖期間が長いためか、シナヌマエビの生息密度が高く、成体と幼体では主に出現する環境が異なっていた模様。 https://t.co/5450JKwNLV

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