THE THYROID GLAND AND LOW-TEMPERATURE RESISTANCE OF GOLDFISH

Publisher Website
Google Scholar
Abstract
Although mammalian thyroid-stimulating hormone increases the low temperature resistance of goldfish, there is no evidence that the increased low-temperature resistance induced by either temperature acclimation or photoperiod control is operating by way of the thyroid gland. Likewise, no evidence was found for increased release of thyroid hormone during cold stress. Mammalian thyrotropin stimulates the secretion of thyroid hormone in goldfish as measured by radiochemical methods. Small doses produce a maximum elevation of plasma-bound radioiodine within 9 to 12 hours. A somewhat higher dosage of TSH seems to be required to stimulate the uptake of radioiodine by the thyroid.