Organismal behavior, with its tremendous complexity and diversity, is generated by
numerous physiological systems acting in coordination. Understanding how these systems …

Sex steroids mediate the organization and activation of masculine reproductive phenotypes
in diverse vertebrate taxa. However, the effects of sex steroid action in this context vary …

Physiology's role in speciation is poorly understood. Motor systems, for example, are widely
thought to shape this process because they can potentiate or constrain the evolution of key …

Highlights•Physiology influences how courtship behaviour evolves.•Innovations in steroid
signalling mechanisms can enhance courtship evolution.•Similarly, innovations in muscle …

Extreme abiotic factors in deep-sea environments, such as near-freezing temperatures, low
light, and high hydrostatic pressure, drive the evolution of adaptations that allow organisms …

Determination of the wingsnap sonation mechanism of the golden-collared manakin (Manacus
vitellinus) | Journal of Experimental Biology | The Company of Biologists Skip to Main Content …

Abstract Brightly colored manakin (Aves: Pipridae) males are known for performing acrobatic
displays punctuated by non-vocal sounds (sonations) in order to attract dull colored females …

Sexual selection through female choice has driven the evolution of some of the most
elaborate signalling behaviours in animals. These displays often require specialized …

Background Through the actions of one or more isoforms of the enzyme 5α-reductase in
many male reproductive tissues, circulating testosterone (T) undergoes metabolic …

Many species perform elaborate physical displays to court mates and compete with rivals,
but the biomechanical mechanisms underlying such behavior are poorly understood. We …