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首页> 外文期刊>Environmental Biology of Fishes >Environmental biology of an endemic cyprinid, Varicorhinus alticorpus, in a subtropical mountain stream of Taiwan
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Environmental biology of an endemic cyprinid, Varicorhinus alticorpus, in a subtropical mountain stream of Taiwan

机译：台湾亚热带山区溪流中一种特有的鲤科鱼类Varicorhinus alticorpus的环境生物学

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摘要

An endemic freshwater fish, Varicorhinus alticorpus, was studied from 1990 to 1993 in a fast flowing mountain stream in southern Taiwan (22 deg 30 min N, 120 deg 30 min E). The analysis of environmental conditions suggested that the fish could tolerate water temperatures between 19-24 deg C, a pH of 8.0-8.8, and flow velocity from 20-100 cm sec~(-1). The fish occupied riffles and pools. They foraged and schooled during daytime and aggregated in crevices between rocks at night. Most juveniles stayed at the shallow sandy-pebble flat by the pool where flow was slow. The species feed primarily on the periphyton growing on the rocks, and leave unique scars after grazing. One peak of juvenile recruitment was observed right after the rainy season, suggesting that reproduction of the fish has adapted to the climate. The change of abundance of adults along the habitats (at 150 to 800 m altitude) also indicated that the fish might migrate to low altitudes for spawning and disperse back to higher altitudes for exploiting new resources. The environmental biology of this fish shows an example of a cyprinid adapted to habitats in a subtropical mountain stream.
机译：1990年至1993年，在台湾南部（北纬22度30分钟，东经120度30分钟）的一条快速流动的山间溪流中研究了一种地方性淡水鱼Varicorhinus alticorpus。对环境条件的分析表明，该鱼可以忍受19-24摄氏度之间的水温，pH 8.0-8.8和20-100 cm sec〜（-1）的流速。鱼占据了浅滩和水池。他们白天白天觅食和上学，晚上聚集在岩石之间的缝隙中。大部分的少年呆在池边的浅沙卵石滩上，那里的水流很慢。该物种主要以生长在岩石上的附生植物为食，放牧后留下独特的疤痕。雨季刚结束时，观察到了幼鱼的吸收高峰，这表明鱼的繁殖适应了气候。沿栖息地（150至800 m高度）成年鱼数量的变化也表明，鱼类可能迁移到低海拔产卵，然后散布回更高的海拔以开发新资源。这条鱼的环境生物学显示了一个适合于亚热带山区河流栖息地的鲤鱼的例子。

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