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首页> 外文期刊>Fisheries Science >Seasonal distribution of adult crucian carp nigorobuna Carassius auratus grandoculis and gengoroubuna Carassius cuvieri in Lake Biwa, Japan
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Seasonal distribution of adult crucian carp nigorobuna Carassius auratus grandoculis and gengoroubuna Carassius cuvieri in Lake Biwa, Japan

机译：日本琵琶湖成年cru鱼ni鱼和长尾assi鱼的季节性分布

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摘要

Seasonal habitat use by nigorobuna Carassius auratus grandoculis Temminck et Schlegel and gengoroubuna Carassius cuvieri (Temminck et Schlegel) in Lake Biwa was investigated using acoustic telemetry. Twenty-three nigorobuna and 11 gengoroubuna specimens caught using set-nets in the lake’s south basin were surgically fitted with acoustic transmitters and then released. Signals from the fishes were recorded by 23 receivers installed around the lake. Between April and June 2007, the first spawning season after release, signals were received from all tagged fishes. Thereafter, until the second spawning season, signals were collected from 26 and 45% of released nigorobuna and gengoroubuna individuals, respectively. Seasonal habitat preferences for these species were studied by distance-based analysis. The analysis revealed that nigorobuna tended to stay near their spawning area in the south basin of the lake throughout the year, whilst gengoroubuna tended to show a seasonal migration pattern between the north and south basins. After the spawning season, the latter species migrated to the north basin where it remained until the next spawning season, when it returned to the south basin. This is the first report of seasonal migration of nigorobuna and gengoroubuna in Lake Biwa.
机译：使用声学遥测技术调查了琵琶湖中的角鼻金枪鱼Car的大生地Temminck et Schlegel和gengoroubuna Carassius cuvieri（Temminck等人）的季节性生境利用。在湖南流域使用固定网捕获的23个黑猩猩和11个gengoroubuna标本通过外科手术安装了声发射器，然后释放。鱼的信号由安装在湖周围的23个接收器记录下来。在释放后的第一个产卵季节2007年4月至6月之间，收到了所有带有标签的鱼类的信号。此后，直到第二个产卵季节，分别从26个和45％的已释放的长鳍金枪鱼和gengoroubuna个体中收集信号。通过基于距离的分析研究了这些物种的季节性生境偏好。分析表明，全年以来，黑鳍金枪鱼倾向于留在其产卵区附近，而Gengoroubuna则倾向于在北部和南部盆地之间表现出季节性迁移模式。在产卵季节之后，后一种物种迁移到北部盆地，直到第二个产卵季节返回南部盆地为止。这是有关琵琶湖的季鱼和gengoroubuna季节性迁徙的第一份报告。

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