Takahashi S, Hori M
Department of Mathematics, Osaka University, Machikaneyama-cho 1-16, Toyonaka 560, Japan.
J Theor Biol. 1998 Nov 7;195(1):1-12. doi: 10.1006/jtbi.1998.0744.
Scale-eating cichlids in Lake Tanganyika exhibit lateral asymmetry polymorphism in their mouth-opening. Frequency of left- and right-handed phenotypes oscillates around unity. In the southern shore of the lake, two scale-eaters coexist in similar densities, where their oscillation synchronize. This phenomena is analysed by a time delay differential equation model, and new mechanisms which maintains polymorphism is discovered. In a wide range of parameters, the oscillation keeps the frequencies of the same phenotype in the two species at a similar level, and prevents the fixation of one phenotype in either species. Copyright 1998 Academic Press
坦噶尼喀湖中的食鳞丽鱼在开口方面表现出左右不对称多态性。左旋和右旋表型的频率在1左右波动。在湖的南岸，两种食鳞鱼以相似的密度共存，它们的波动是同步的。通过一个时滞微分方程模型对这一现象进行了分析，并发现了维持多态性的新机制。在很宽的参数范围内，这种波动使两个物种中相同表型的频率保持在相似水平，并防止任何一个物种中单一表型的固定。版权所有1998年学术出版社
