DEMONSTRATION OF 3β-HYDROXYSTEROID DEHYDROGENASE IN THE TESTIS OF TILAPIA MOSSAMBICA (CICHLIDAE, TELEOSTEI)

Publisher Website
Google Scholar
Abstract
Two types of endocrine tissues are encountered in the teleost testis, the typical interstitial tissue, which is also found in higher vertebrates, and the lobule-boundary cells which may be the only endocrine tissue in the testes of some teleosts (Marshall & Lofts, 1956). The inference that these tissues produce androgens is based on the following grounds: (1) changes in the histological appearance of the interstitial and the boundary cells concomitant with the reproductive state of the fish (Henderson, 1962); (2) development of male secondary sex characters in fishes after the administration of mammalian androgens (Pickford & Atz, 1957; Dodd, 1960); (3) isolation of progesterone, oestriol, oestrone and 11-ketotestosterone from the testis and blood of certain bony fishes (Chieffi, 1962; Schmidt & Idler, 1962). Histochemistry, apart from enabling morphological allocation, provides a simple means for the determination of tissue constituents while requiring very minute amounts of tissue. However, the histochemical studies

This publication has 0 references indexed in Scilit: