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Sexually antagonistic selection during parental care is not generated by a testosterone-related intralocus sexual conflict–insights from full-sib comparisons
It is hypothesized that behavioural and physiological trade-offs differ between sexes when raising offspring, driving T levels towards a state of monomorphism, which contrasts the expectations and challenges the hypothesis of intralocus sexual conflict driven by T. Expand
Negative frequency-dependent selection or alternative reproductive tactics: maintenance of female polymorphism in natural populations
BackgroundSex-limited polymorphisms have long intrigued evolutionary biologists and have been the subject of long-standing debates. The coexistence of multiple male and/or female morphs is widelyExpand
Decreasing parental task specialization promotes conditional cooperation
Using a biparental bird species and repeated sampling of behavioural activities throughout a major part of reproduction, a clear division of tasks between males and females in provisioning, brooding and foraging is shown. Expand
Frequency-dependent variation in mimetic fidelity in an intraspecific mimicry system
This study provides direct quantitative support for the prediction that the mimetic similarity of mimics to their models increases as the mimic/model ratio increases, and suggests that the phenomenon may be widespread in a range of mimicry systems. Expand
Did historical events shape current geographic variation in morph frequencies of a polymorphic damselfly
It is suggested that the species' evolutionary history, such as random genetic drift during recolonization, may also be important in explaining the current geographical distribution of female morph frequencies. Expand
Frequency-Dependent Selection on Female Morphs Driven by Premating Interactions with Males
It is concluded that considering interactions among all players—here, males and females—is crucial to fully understanding the mechanisms underlying the maintenance of genetic polymorphisms in the wild. Expand
Biogeographical Survey Identifies Consistent Alternative Physiological Optima and a Minor Role for Environmental Drivers in Maintaining a Polymorphism
Large-scale (>1000 km) geographic variation in morph frequencies and fitness-related physiological traits in the damselfly Nehalennia irene supports widespread correlational selection, possibly driven by male harassment, favouring alternative trait combinations in both female morphs. Expand
Genes, environments and their interaction: song and mate choice in canaries
The results suggest that indirect genetic effects acting during the pre- and postfledging social contexts may play a prominent role in sexual selection. Expand