Intercohort cannibalism and post-partum behaviour of juvenile swordtail Xiphophorus helleri Heckel (Pisces: Poeciliidae)

摘要: Newborn (i.e. neonate) swordtail Xiphophorus helleri Heckel attempted to escape cannibalization attempts in a downward direction more frequently than any other direction. The response is likely be anti-predator behaviour. In addition, neonates were often able at the time of birth, despite no previous exposure predators, which suggests that this behaviour innate. However, birth vulnerable cannibalism older juveniles, supports hypothesis is, least part, further developed as result experience learning).