The males of the freshwater snail Pomacea canaliculata have a copulatory apparatus consisting in a delicate penis running through a muscular channeled sheath bearing three different glands. The outer gland is the most ...

Signaling the ability to provision limited re-sources to a mate's reproductive success should be favored by sexual selection. In many taxa, female mate choice is driven by courtship offerings in the form of nutritional ...

The reproductive success of an individual is optimized following trade-off constraints among its life-history components, where the decision to invest into reproduction or maintenance is influenced by selective pressures ...

The reproductive success of an individual is optimized following trade-off constraints among its life-history components, where the decision to invest into reproduction or maintenance is influenced by selective pressures ...

Adult males of Eidmanacris corumbatai Garcia have reduced tegmina without stridulatory apparatus. For this reason, they developed other means of intra-specific communication. During courtship, the males use a combination ...

Adult males of Eidmanacris corumbatai Garcia have reduced tegmina without stridulatory apparatus. For this reason, they developed other means of intra-specific communication. During courtship, the males use a combination ...

While expulsion of male ejaculates by the females after copulation has been reported for various animal groups, expulsion followed by consumption of the expelled ejaculate is a rare behaviour outside spermatophylax-producing ...

Se estudian las conductas reguladoras, agonística, amistosa, sexual, y parental del pécari de collar (Tayassu tajacu) en cautividad. Las observaciones se llevaron a cabo durante 1 año en un rebaño de 60 animales en el ...