Lamprecht J, Rebhan T
Max-Planck-lnstitut für Verhaltensphysiologie, Postfach 1564, D-82305 Starnberg, Germany.
Behav Processes. 1997 Feb;39(2):161-76. doi: 10.1016/s0376-6357(96)00052-6.
In isolated pairs of the biparental convict cichlid (Cichlasoma nigrofasciatum) caring for fry, pairbonds can be broken by removal of the fry. Within three hours, the mates of many pairs become so mutually aggressive that the female finally flees from her larger mate, who chases her. The pairbond is mended within seconds upon re-introduction of the fry. Yet removal of young leaves some pairs little or not at all affected. They seem to have more stable pairbonds. Multiple regression of data from 39 pairs on a quantitative measure of pairbond destruction revealed support for the so-called parity-hypothesis, which holds that a cichlid pair is compatible only when the female's aggressiveness compensates for her smaller size. The size of the female relative to the male's, and her aggressiveness relative to his in the undisturbed situation, proved positive predictors of pair stability in the fry stage. Thus the same factors which have earlier been shown to favour pair formation in other biparental cichlids seem also responsible for pair stability in a later stage of the reproductive cycle.
在照顾幼鱼的双亲慈鲷（黑带丽体鱼）的单独配对中，移除幼鱼会导致配偶关系破裂。在三小时内，许多配对中的配偶会变得相互攻击，以至于雌鱼最终会逃离体型更大的雄鱼，而雄鱼则会追赶它。在重新引入幼鱼后的几秒钟内，配偶关系就会修复。然而，移除幼鱼对一些配对几乎没有影响或根本没有影响。它们的配偶关系似乎更稳定。对39对数据进行的关于配偶关系破坏定量测量的多元回归分析支持了所谓的均等假说，该假说认为，只有当雌鱼的攻击性能够弥补其较小的体型时，慈鲷配对才是相容的。在未受干扰的情况下，雌鱼相对于雄鱼的体型以及她相对于雄鱼的攻击性，被证明是幼鱼阶段配偶稳定性的正向预测指标。因此，早期已被证明有利于其他双亲慈鲷形成配对的相同因素，似乎也对繁殖周期后期的配偶稳定性负责。
