The Effects of Prolactin and Thyroxine on Tail Fin Height, Habitat Choice, and Forelimb Regeneration in the Adult Newt (Notophthalmus Viridescens)
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Citation:The Ohio Journal of Science. v79, n1 (January, 1979), 32-37
Near maximum tail height of freshly collected adult male newts was maintained in the laboratory at 21.5°C by intraperitoneal injections of prolactin alone or by a combination of prolactin and thyroxine. Tail height of male newts at 5°C was also maintained with or without thyroxine treatment. Tail height decreased by over 40% when male newts at 21.5°C were given saline or thyroxine. Both male and female newts, after 1 week at 21.5°C laboratory conditions, begin to leave the water. This land habitat choice is enhanced somewhat by thyroxine but completely abolished by prolactin with or without thyroxine. In addition to effects on tail fin height and land-water choice, prolactin also enhanced limb regeneration rate of adult newts.
Author Institution: Department of Zoology, Developmental Biology Program, Ohio State University
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