Hormonal profiles correlated with season, cold, and starvation in Rana catesbeiana (bullfrog) tadpoles.

Abstract

Bullfrog (Rana catesbeiana) tadpoles are of value to amphibian researchers because of their large size, and year-round availability due to overwintering in many latitudes. Concern over a possible difference in hormonal parameters in tadpoles obtained at different times of the year prompted us to investigate thyroid gland secretion in vitro, plasma and… (More)

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