Embryonic temperature shapes behavioral change following social experience in male leopard geckos, Eublepharis macularius

Article Abstract:

The leopard gecko is the lizard with temperature-dependent sex determination; the social behavior of these species is affected by embryonic incubation temperature (IncT), which make them less sexually active than the one, which is hatched from eggs. The study reveals that heterosexual social experiences increased territorial behavior and the display of anticipatory behaviors in males from female- biased IncT but not in males from male biased IncT.

Evaluation, Geckos, Heterosexuality

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The subordination stress paradigm and the relation between testosterone and corticosterone in male ring-necked pheasants

Article Abstract:

The relations linking glucocorticoids, testosterone, social and sexual behavior in male ring-necked pheasants, Phasianus colchicus, is investigated. Male pheasants displaying testosterone-dependent signals during the whole mating period have higher testosterone and corticoterone concentrations. The results do not support the subordination stress paradigm, but may support the stress-mediated version of the immunocompetence handicap hypothesis.

Influence, Corticosteroids, Testosterone, Ring-necked pheasant, Glucocorticoids

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Reciprocal altruism between male vampire bats, Desmodus rotundus

Article Abstract:

A study of the social behavior of adult vampire bats revealed that males of this bat species displayed reciprocal altruistic food sharing in non-crowded conditions. Food-sharing is paramount for their survival in coping with their low fecundity rates and constant failure to feed at night.

Analysis, Food and nutrition, Altruistic behavior in animals, Animal altruistic behavior, Vampire bats

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