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首页> 外文期刊>海洋理工学会誌 >Multiyear use for spawning sites by crucian carp in Lake Biwa, Japan
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Multiyear use for spawning sites by crucian carp in Lake Biwa, Japan

机译：日本湖博伊瓦湖的Crucian鲤鱼的Puredyear用途

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摘要

From April 2008 to July 2009, an acoustic telemetry study on crucian carp was conducted in Lake Biwa, Japan. Twenty Nigorobuna, ten gengoroubuna and one ginbuna captured during spawning seasons were released with ultrasonic transmitters in the South Basin. Signals from the tagged fish were detected by 28 ultrasonic-receiver stations installed around Lake Biwa. Seasonal preference of habitats was examined by distance-based analysis. Seasonal distributions of nigorobuna and gengoroubuna in Lake Biwa were observed including consecutive two spawning seasons. It was revealed that seasonal migration patterns of nigorobuna and gengoroubuna were different. Nigorobuna appeared mainly around the release site all the year round, while gengoroubuna migrated to the North Basin after their spawning season, where they stayed during the non-spawning season, and moved to the South Basin in the next midwinter, where they stayed until the end of the next spawning season. It was also revealed that gengoroubuna preferred lower water temperature than nigorobuna. Gengoroubuna moved faster than nigorobuna and ginbuna. There were high-degree correlations in distance ratios of each station during spawning seasons in the release year and the next year in both nigorobuna and gengoroubuna, suggesting a multiyear use for the same spawning site. Through these results, deeper understanding of these endangered fish species in Lake Biwa and information to help the development of effective conservation programs would be provided.
机译：从2008年4月到2009年7月，一名关于Crucian Carp的声学遥测研究在Biwa湖，日本湖。在南部盆地的超声波发射器释放出来的二十岁尼甘油，10个Gengoroubuna和一个金栏。由标记的鱼类的信号由安装在琵琶湖周围的28个超声波接收站。通过基于距离的分析检查栖息地的季节偏好。观察到Biwa湖中Nigorobuna和Gengoroubuna的季节性分布，包括连续两个产卵季节。据透露，Nigorobuna和Gengoroubuna的季节性迁移模式不同。 Nigorobuna全年主要出现在释放网站周围，而Gengoroubuna在他们的产卵赛季后迁移到北部盆地，在那里他们在非产卵季节留下，并在下一个仲冬季搬到南部盆地，在那里他们留下了结束了下一个产卵季节。还透露，Gengoroubuna优选的水温比Nigorobuna更低。 Gengoroubuna比Nigorobuna和Ginbuna更快地移动。在释放年份的产卵季节和Nigorobuna和Gengoroubuna的明年期间，每个站的距离比率都有高度相关性，这表明同样的产卵部位使用了多年的用途。通过这些结果，更深入地了解在Biwa湖中这些濒危鱼类和提供有助于帮助发展有效保护计划的信息。

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