A comparison of the vocal repetoires of captive Spheniscus penguins.
This study characterized the vocal repertoires of captive African Spheniscus demersus, Humboldt S. humboldti, and Magellanic S. magellanicus Penguins. The contexts of the calls observed in captivity were consistent with the functions reported in the wild. However, the number and types of calls appeared to be influenced by the stability and density of the captive […]
Glucocorticoid and androgen signaling pathways diverge between advertisement calling and non-calling fish
Behavioral and neuroendocrine mechanisms of social vocalization in teleost fish are influenced by the glucocorticoid cortisol and the androgen 11-ketotestosterone (11kT). The relative abundance of both 11kT, which binds to androgen receptors (ARα, ARβ), and cortisol, which binds to glucocorticoid receptors (GR-1, GR-2), is regulated by 11β-hydroxylase (11βH) that converts 11-deoxycortisol to cortisol and testosterone […]