In species in which intense intermale competition for the access to females is present males
of lower competitive ability may adopt alternative reproductive tactics (ART) to get access to …

We investigated the effects of male population density and male-biased operational sex ratio
(OSR) with constant and limited resource density on male mating tactics shown by a …

The potential reproductive rate (PRR), which is the offspring production per unit time each
sex would achieve if unconstrained by mate availability, often differs between the sexes. An …

We investigated the consequences of male-male interference competition associated with
alternative male mating tactics in a freshwater fish, the European bitterling (Rhodeus …

In the peacock blenny, Salaria pavo, a species with courtship sex-role reversal, smaller,
younger males mimic the courtship behavior and the nuptial coloration of females in order to …

This chapter deals with the operational sex ratio (OSR) and its importance for understanding
mating competition, which is a key component of sexual selection. We focus on OSR as an …

Predation and microbial infections are the major causes of natural mortality for early life
stages of oviparous species. The parental traits reducing the effects of predation are rather …

Abstract At the Lower Rhine, three congeneric, invasive Gobiidae constitute the major part of
local fish assemblages. Reproduction strategies play an important role in biological invasion …

In many mating systems, males adopt alternative reproductive tactics (ARTs) to maximize
reproductive success. In fishes, guarding males often invest more energy into courtship …

Background Sex ratios are important empirical data in predicting sex allocation strategy and
selection in populations. Therefore, they should be sampled at crucial developmental steps …