Amphibian behavioral endocrinology has focused on reproductive social behavior and
communication in frogs and newts. Androgens and estrogens are critical for the expression …

Rather than being a static, species specific trait, reproductive behavior in female amphibians
is variable within an individual during the breeding season when females are capable of …

Females alter their mate choices as they transition through different reproductive stages;
however, the proximal mechanisms for such behavioral fluctuation are unclear. In many …

Twenty four castrated male, 6 intact male, and 11 intact female Hyla cinerea were injected
subcutaneously with 25 μg arginine-vasotocin (AVT) and induced to call 1 h later in …

Plasma levels of gonadotropins and sex steroids in Bufo japonicus were surveyed at
different behavioral stages during the breeding period in March. All hormone levels were …

Female behavioral responses to sensory stimuli can be highly variable across the
reproductive cycle. Female green treefrogs (Hyla cinerea) use the male vocal signal to …

Tropically breeding anurans that require heavy rainfall in order to reproduce are subject to
favorable breeding conditions that are sporadic. Although there is an increased probability …

1. Androgen, 17beta-estradiol and corticosterone levels were measured by RIA in plasma of
Rana esculenta frogs sampled in the field and in the laboratory. 2. Androgen and 17beta …

The effects of short‐term confinement (24 hours) on the plasma levels of gonadal hormones
and corticosterone have been evaluated in Rana esculenta, which is widely used in …

Abstract The Mexican leaf frog, Pachymedusa dacnicolor, an inhabitant of the semiarid,
subtropical Mexican lowlands, displays a well-defined seasonal testicular cycle. Testis …