Using a recursion model with real parameters of Nabis pseudoferus, we show that its filial cannibalism is an optimal foraging strategy for life reproductive success, but it is not an evolutionarily optimal foraging strategy, since it cannot maximize the descendant’s number at the end of the reproductive season. Cannibalism is evolutionarily rational, when the number of newborn offspring produced from the cannibalized offspring can compensate the following two effects: (a) The cannibalistic lineage wastes time, since the individuals hatched from eggs produced by cannibalism start to reproduce later. (b) Cannibalism eliminates not only one offspring, but also all potential descendants from the cannibalized offspring during the rest of reproductive season. In our laboratory trials, from conspecific prey Nabis pseudoferus did not produce newborn nymphs enough to compensate the above two effects.

使用具有真实参数的Nabis pseudoferus的递归模型，我们表明其子嗣同类相食是生命繁殖成功的最佳觅食策略，但它不是进化上的最佳觅食策略，因为它无法在繁殖结束时最大化后代数量季节。同类相食在进化上是合理的，当被同类相食的后代产生的新生后代的数量可以补偿以下两个影响时：（a）同类相食的谱系浪费时间，因为从同类相食产生的卵孵化的个体较晚开始繁殖。 (b) 同类相食不仅消灭了一个后代，而且在繁殖季节的剩余时间里，也消灭了被同类相食的后代的所有潜在后代。在我们的实验室试验中，来自同种猎物的Nabis pseudoferus并没有产生足以补偿上述两种影响的新生若虫。