Insects display a staggering diversity of mating and social behaviours. Studying these
systems provides insights into a wide range of evolutionary and behavioural questions, such …

Mate choice is common in most animals, but the issue has largely been ignored in regard to
pelagic copepods—the most abundant zooplankton group in the oceans. Contemporary …

Body size differences among coexisting related species are common, but the actual effect of
these differences in mitigating interspecific interactions, such as resource competition and …

The Japanese Islands have been largely isolated from the East Asian mainland since the
Early Pleistocene, allowing the diversification of endemic lineages. Here, we explore …

Animal body size is involved in reproduction in various ways. Carabus japonicus exhibits
considerable variation in adult body size across geographical locations depending on the …

In many polyandrous species, the last male to mate sires most of the offspring. This
phenomenon has been explained as the result of male manipulation, postcopulatory female …

We analysed evolutionary diversification and covariation in male genitalia and four mating
traits related to sexual selection, ie testis size, spermatophore size, copulation duration and …

Mating systems are diverse in animals, notably in crustaceans, but can be inferred from a
limited set of parameters. Baeza and Thiel (2007) proposed a model predicting mating …

Speciation studies seek to clarify the origin of reproductive isolation, the various
mechanisms working from mate recognition through postzygotic stages. Asymmetric effects …

Animals with internal fertilization often exhibit marked diversification in genital morphology
among closely related species. However, our knowledge of the genetic architecture …