One-sided infections by intestinal parasites in two sympatric porpoises bycaught from the Nemuro Strait of Hokkaido, Japan
One-sided infections by intestinal parasites in two sympatric porpoises bycaught from the Nemuro Strait of Hokkaido, Japan
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日本北海道根室海峡捕获的两只同域江豚出现一侧肠道寄生虫感染
DOI：
10.1016/j.parint.2020.102118
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发表时间：
2020
影响因子：
1.9
通讯作者：
Mari Kobayashi
中科院分区：
文献类型：
--
作者：
Hirotaka Katahira;Hana Ashida;Mari Kobayashi
由于海洋哺乳动物野外取样的困难和局限性，日本对其寄生虫的定量调查仍然很少。我们在此报告了2014年至2018年间在日本Nemuro海峡北部捕获的港鼠海豚（n= 34）和达尔鼠海豚（n= 10）肠道寄生虫的感染状况。对港鼠海豚的尸检发现了一种地沟海豚，一种日本合成海豚，和两种棘头海豚，一种冠体海豚。andBolbosomasp。在德尔氏鼠海豚中未发现感染。优势寄生物为钩孢虫。细节。日本蜱的流行率分别为73.53%和64.71%，平均丰度分别为43.88和7.38个个体。尽管这两种鼠海豚在这条狭窄的海峡中有同域分布，但研究结果支持了营养链依赖性的存在，这可以不同地影响对这些寄生虫的脆弱性。
Due to the difficulties and limitations associated with field sampling of marine mammals, quantitative surveys on their parasites are still scarce in Japan. We here report the infection statuses of intestinal parasites in harbor porpoises (n= 34) and Dall's porpoises (n= 10), bycaught between 2014 and 2018 by a bottom set-net fishery in the northern part of the Nemuro Strait, Japan. Necropsies of the harbor porpoises recovered one digenean,Synthesium nipponicum, and two acanthocephalans,Corynosomasp. andBolbosomasp.; no infection was observed in the Dall's porpoises. The dominant parasites wereCorynosomasp. andS.nipponicum, with a prevalence of 73.53 and 64.71% and a mean abundance of 43.88 and 7.38 individuals, respectively. Although the two porpoise-species have a sympatric distribution in this narrow strait, the findings support the existence of trophic-link dependences, which can differentially affect vulnerability to these parasites.