Abstract
IN mammals, extensive investigations have established the concept that normal rates of secretion of thyrotrophic hormone (TSH) depend upon stimulatory influences from the hypothalamus transmitted via the pituitary stalk, though it is admitted that very low levels of TSH-output may persist in the absence of this hypothalamic stimulation1. In amphibians, diminution or cessation of TSH-output has been reported following stalk transection2 or heterotopic pituitary transplantation3, though in some experiments the transplanted gland secreted considerable amounts of TSH2,4. The situation in teleost fishes has not previously been investigated. In this paper we shall present evidence of abundant TSH-production by the transplanted pituitary in the small viviparous cyprinodont, Mollienesia formosa (Girard).
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References
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BALL, J., OLIVEREAU, M. & KALLMAN, K. Secretion of Thyrotrophic Hormone by Pituitary Transplants in a Teleost Fish. Nature 199, 618–620 (1963). https://doi.org/10.1038/199618a0
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DOI: https://doi.org/10.1038/199618a0
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