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Cyprinella lutrensis


Cyprinella lutrensis
Red Shinner
彩虹精灵
The Red Shiner (Cyprinella lutrensis) is a species of ray-finned fish in the Cyprinidae family. They are deep-bodied and laterally compressed and can grow to about three inches in length. For most of the year both males and females have silver sides and whitish abdomens. Males in breeding coloration, on the other hand, have iridescent pink-purple-blue sides and a red crown and fins (except the dorsal fin which remains dark). They are omnivorous since they eat both aquatic and terrestrial invertebrates as well as algae. Red shiners have also been known to eat the eggs and larvae of native fish found in locations into which the red shiner has been introduced
Red shiners are found naturally in a variety of aquatic habitats, including backwaters, creek mouths, streams containing sand and silt substrates, riffles, and pools. They are tolerant of areas of frequent high turbidity and siltation, but they tend to avoid waters with high acidity. Red shiner are habitat generalists in that they are adapted to favor a wide range of environmental conditions that most other fish species cannot tolerate. These include habitats that are degraded due to human disturbance, and those with poor water quality (such as polluted waterways), natural physiochemical extremes, and seasonally intermittent flows
1853年由Baird与Girard所发表的彩虹精灵,早在十多年前就已出现在台湾的水族馆了,十年如一日地就连名字也未曾变过。如果读者们是水族馆的常客,对这次的主角一定不陌生,但可能多半局限在眼熟常见,却对牠们的特征与习性不甚了解。其实牠们不仅仅只是体健易饲的观赏鱼,还有许多特殊的表现与变化值得去比较观察,相信饲主将会从中发现不少饲养乐趣,以及这只美丽脱俗的鱼儿所蕴藏的丰富变化
彩虹精灵的生命力强韧,牠们多半是在多石头、流速快的溪流中栖息活动,这样的环境也造就了牠们闪电般的流畅游速。本种的背鳍有7~8根鳍条,臀鳍有9~10根鳍条,牠们的体侧有橄榄银的色泽分布;繁殖期间公成鱼的体侧会呈现泛蓝光泽,且除背鳍外,各鳍会转变成鲜红色,还有俗称〝追星〞的白色星点斑纹布满在泛红的头部,让整体色彩变得更华丽鲜艳,母鱼的颜色则较为淡雅。特别的是,繁殖期过后牠们会恢复成平淡的橄榄银灰色鱼体,等到下一次的繁殖期来临,雄鱼的体色会再次变得鲜艳亮丽。
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