For sexual selection to act on a given sex, there must exist variation in the reproductive
success of that sex as a result of differential access to mates or fertilisations. The …

Theoretical models and empirical studies in various taxa have identified important links
between variation in sex roles and the number of adult males and females (adult sex ratio …

It is often argued that anisogamy causes alternative reproductive tactics (ARTs) to be more
common in males than females. We challenge this view by pointing out logical flaws in the …

Studying abrupt ecological shifts under gradual environmental change caused, in particular,
by human activity is important for understanding the fundamental aspects and underlying …

Inbreeding depression is commonly considered an evolutionary influence on pre-copulatory
mechanisms of inbreeding avoidance. Inbreeding may be minimized by:(1) delayed …

Fitness consequences of early-life conditions remain unclear and poorly studied in
mammals. Based on long-term observations of yellow ground squirrels (Spermophilus …

Data on the reproductive success and reproductive behavior of the domestic cat, the most
widespread representative of the family Felidae, are presented. The effects of the number of …

For short‐lived species, selection for early reproduction should be strong, yet females often
delay their first reproductive bout. Delay in age of first reproduction due to developmental …

Juvenile survival is a key life-history influence on population dynamics and adaptive
evolution. We analyzed the effects of individual characteristics, early environment, and …

The intensity of mating competition and the opportunity for sexual selection are thought to
depend on the operational sex ratio, the ratio of sexually active males to fertilizable females …