孔雀鱼是一种热带观赏鱼,其雄鱼的体色如孔雀羽毛一般绚丽多彩,倍受人类青睐。实际上,雄鱼多姿的体态是为了吸引雌鱼。科学家发现雌性孔雀鱼似乎有着喜新厌旧的性格,他们不会“专一”地喜欢某一种外观的雄鱼,而是始终垂青新鲜面孔。为了检测雌性孔雀鱼是否真的更喜欢新鲜面孔,美国弗罗里达州立大 Guppies is a tropical ornamental fish whose body color, such as peacock feathers, is generally colorful, much favored by humans. In fact, male and female body posture is to attract females. Scientists have found that female guppies seem to have an ecstatic personality that does not “likely” like a certain appearance of male fish, but always look fresh. In order to test whether female guppies really prefer fresh faces, the Florida State University