Variations in endocrine balance in Xenopus laevis specimens progressively acclimated to dehydrating conditions.

Exposure of Xenopus laevis adult male specimens to osmotic stress due to water progressive removal from their environment in our laboratory, resulted in a highly significant rise in their serum aldosterone and corticosterone levels. The present findings are discussed with regard to the balance between interrenal hormones and prolactin. Changes in circulating prolactin levels, elicited in these same animals by dehydration, had also been indicated by results (reported elsewhere) obtained by studies on their specific PRL receptors.