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首页> 外文期刊>Limnology >Chestnut goby, Gymnogobius castaneus (O'Shaughnessy 1875), as a suitable host of Anemina arcaeformis (Heude 1877) in floodplain water bodies, Hokkaido, Northern Japan
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Chestnut goby, Gymnogobius castaneus (O'Shaughnessy 1875), as a suitable host of Anemina arcaeformis (Heude 1877) in floodplain water bodies, Hokkaido, Northern Japan

机译：Chestnut Goby，Gymnogobius Castaneus（O'Shaughnessy 1875），作为洪泛区水体，北海道，日本北海道的合适艾米纳arcaeformis（Heude 1877）

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摘要

This study examined a host-parasite relationship between chestnut goby Gymnogobius castaneus (O'Shaughnessy 1875) and a unionid mussel Anemina arcaeformis (Heude 1877) in three floodplain water bodies of the Ishikari River. Field observations of gravidity between summer (July 2016) and spring (May 2017) revealed that female A. arcaeformis began incubating eggs in September, and all reached a fully ripe-glochidia-gravid stage by May with a decreasing trend in the proportion of gravid individuals. Two laboratory experiments, in which field-caught G. castaneus were artificially infected by glochidia of A. arcaeformis, showed that transformation rates were among the highest ever reported for A. arcaeformis (an average across all the surviving individuals: 47.9%) with a shorter development time in warmer environments. Transformation rates did not differ among sympatric or allopatric pairs, nor decrease when infected twice. Relatively high transformation rates were attributed to high glochidia attachments to gills and mouth cavity (approximately 30% of initially attached individuals) following the highest to fins, or a reduced immunity against infection due to colder environments. Overall, our study demonstrated that chestnut goby (G. castaneus) served as a suitable host of winter-breeding A. arcaeformis. Together with records of the expanded distribution of these two species in the past 30 years, it might be relatively recently that these two have colonized the study areas after extensive land changes, with A. arcaeformis having benefited from a successful host-parasite relationship.
机译：本研究审查了栗子虎虎（O'Shaughnessy 1875）之间的寄生虫关系，并在IShikari河的三个洪泛区水体中进行了一个促进贻贝anemina arcaeformis（Heude 1877）。夏季（2016年7月）与春季（2017年7月）（2017年5月）的现场观察揭示了雌性A. Arcaeformis于9月开始孵育鸡蛋，并通过妊娠的比例的趋势降低趋势，达到了完全成熟的Groochidia-妊娠阶段。个人。两种实验室实验，其中捕获的G. castaneus是由A. Arcaeformis的Groochidia人为地感染的，表明转化率是A. Arcaeformis（所有幸存人员的平均值）中迄今为止的最高率为A.较短的开发时间在温暖的环境中。转化率在SympaTric或Allopatric对中没有区别，而感染两次，也不会降低。相对较高的转化率归因于在最高到翅片之后的鳃和口腔（最初附着的个体的大约30％的30％）的高科学率附着，或由于较冷的环境而减少免疫感染。总体而言，我们的研究表明，栗子虾（G. Castaneus）作为合适的冬季育种A. Arcaeformis。与过去30年中这两个物种的扩大分布的记录一起，这两个人可能相比，这两者在广泛的土地变化后殖民地殖民地，A arcaeformis受益于成功的宿主寄生虫关系。

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