Laboratory behavioral-observations and experiments on reproductive tactics of cooperative breeding fishes

我们的实验室实验表明，以下生殖策略行为在合作多雄的慈鲷鱼J.转录：（1）雌鱼与两条雄鱼三次产卵时进行假产卵的次数比一次产卵时多得多;（2）雄鱼会根据射精次数来识别父性的程度，并决定亲性的照顾程度;（3）雌性可能通过产卵和假产卵的频率来识别雄性在每次产卵中的亲子关系。我们的实验还表明，这种鱼会进行传递性推理。我们的研究结果表明，在鱼类进化的“Macaberian智力”的可能性。

Our laboratory experiments suggested following reproductive strategic behaviors in the cooperatively polyandrous cichlid fish J.transcriptus : (1) females conducted pseudo-spawning during trio-spawning with two males much more frequently than monogamous spawning, (2) males will recognize the degree of paternity depending on the numbers of ejaculations, and decide the degree of parental care, and (3) females likely recognize how males recognize the paternity in each spawning via the frequency of spawning and pseudo-spawning. Our experiments also show that this fish will conduct transitive inference. Our results suggest the possibility of evolution of 'Macaberian intelligence' in fish.