Animals evaluate and respond to their social environment with adaptive decisions.
Revealing the neural mechanisms of such decisions is a major goal in biology. We analyzed …

Squamate reptiles (lizards and snakes) offer a unique model system for testing hypotheses
about the evolutionary transition from oviparity (egg-laying) to viviparity (live-bearing) in …

1. Optimal egg size theory predicts that females should produce propagules of a size and
number that maximize maternal fitness. However, studies of the allocation of resources to …

We studied steroid hormone patterns and aggression during breeding in female Galápagos
marine iguanas (Amblyrhynchus cristatus). Females display vigorously towards courting …

OBJECTIVE To describe diagnosis, treatment, and outcome of and risk factors for
ophthalmic disease in leopard geckos (Eublepharis macularius) evaluated at a veterinary …

Androgens regulate the expression of male reproductive behaviour in diverse vertebrate
species, often acting on androgen receptors (AR) to induce structural or functional changes …

In non-avian reptiles, the onset of sexual dimorphism of the major structures of the urogenital
tract varies temporally relative to gonadal differentiation, more so than in other amniote …

Recently, we have described the ontogeny of histofunctional differentiation changes in the
oviduct of Caiman latirostris. The expression of estrogen receptor alpha and progesterone …

Size matched male green anoles (Anolis carolinensis) were paired in a neutral setting and
allowed to engage in aggressive displays. Winners and losers were apparent in each pair …

Circulating androgens reach high concentrations in females of some reptiles and
amphibians. We are testing the hypothesis that androgens can act directly in female reptilian …