Fernö A, Sjölander S
Division of Ethology, Department of Zoology, University of Stockholm, Sweden.
Behav Processes. 1976 Jul;1(1):3-14. doi: 10.1016/0376-6357(76)90003-6.
In a pilot test, individuals of two colour morphs of Cichlasoma nigrofasciatum showed colour preferences in their schooling behaviour according to previous experience. Two further experiments were undertaken to investigate if such experientially induced preferences could reflect on the choice of mate. In one experiment white males who had been reared differently with regard to the colour morph of parents and siblings were given females of the different colour morphs (white and normal) to choose from, the females being successively removed after pairing to induce further choices. In this test, however, the males predominantly chose normal females, probably because of dominance relationships among the females, which masked a possible colour preference. Instead, a free choice test was devised, where 74 white and 74 normal fishes were allowed to pair off freely in a large tank. Here, a statistically significant sexual preference for the previously experienced colour morph was found. These results, as well as the possible evolutionary consequences, are discussed.
在一项初步试验中，黑带丽体鱼的两种颜色形态的个体根据以往经验在集群行为中表现出颜色偏好。另外进行了两项实验，以研究这种由经验诱导的偏好是否会反映在配偶选择上。在一项实验中，将在父母和兄弟姐妹的颜色形态方面饲养方式不同的白色雄鱼，与不同颜色形态（白色和正常）的雌鱼放在一起供其选择，配对后雌鱼会被相继移走以促使雄鱼做出进一步选择。然而，在这个试验中，雄鱼主要选择正常雌鱼，这可能是因为雌鱼之间的支配关系掩盖了可能的颜色偏好。相反，设计了一个自由选择试验，让74条白色鱼和74条正常颜色的鱼在一个大水箱中自由配对。结果发现，对于之前所经历的颜色形态存在统计学上显著的性偏好。本文讨论了这些结果以及可能的进化后果。
