Competition between Color Morphs of the Polychromatic Midas Cichlid Cichlasoma citrinellum
Competition between Color Morphs of the Polychromatic Midas Cichlid Cichlasoma citrinellum
复制标题
多色 Midas Cichlid Cichlasoma citrinellum 颜色变形之间的竞争
作者：
G. Barlow
蜜达斯慈鲷，chichlasoma citrinellum，是一种多色鱼，产于尼加拉瓜。所有这些鱼一开始都是正常颜色的、隐秘的个体。在一些种群中，一些鱼会变成明显的彩色变种，最常见的是金色。当保存在未混合的颜色组中时，金色和正常的生长速度相同；但当它们混合在一起时，黄金的生长速度会变快，而正常的生长速度会变慢。在食物竞赛中，金牌主宰着普通选手，这就是他们的优势所在。
The Midas cichlid, Cichlasoma citrinellum, is a polychromatic fish that occurs in Nicaragua. All of these fish start life as normally colored, cryptic individuals. In some populations a few fish change into conspicuously colored morphs, most frequently gold. When kept in unmixed color groups, golds and normals grow at the same rate; but when they are mixed, growth of the golds becomes faster and that of the normals slower. Golds dominate normals in contests over food, which accounts for their advantage.