A HISTO- AND CYTOLOGICAL STUDY ON THE PITUITARY OF THE STICKLEBACK GASTEROSTEUS ACULEATUS L. FORMA TRACHURA CUV. PARTLY BASED ON A NEW FIXATION PROCEDURE AFTER FREEZE DRYING by P. J. VAN MULLEM (Zoological Laboratory, University of Leiden) 148 I. GENERAL INTRODUCTION Modern histological and endocrinological investigations have shown the existence of an interesting cellular basis for the endocrinological function of the pituitary: the production of several hormones, such as follicle stimulating hormone (FSH), luteinizing hormone (LH), and thyrotrophin (TSH) could be localized in the pars anterior of the pitui- tary. Moreover, for every hormone tinctorially different cell types, which appeared to have a definite spatial localization, could be in- dicated. The experiments have been done with mammals, mainly the rat (CATCHPOLE, Igq.g-'5o; HALMI, 1950, 1951, I952a, Ig5zb; HILDE- BRAND, RENNELS and FINERTY, 1957; PURVES and GRIESBACH, Ig5Ia, I95Ib, I95IC, Ig54., 1956; RENNELS, 1957; WILSON and EzRIN, 1952). Successful experiments of this kind seem to have been done only on a limited scale with animals of the group of Teleost fishes. According to the nowadays generally accepted opinion in Teleostei both thyrotrophin and gonadotrophin (there is only scarce evidence for the existence of FSH, the gonadotrophin in fishes should
Archives Néerlandaises de Zoologie (in 1967 continued as Netherlands Journal of Zoology) – Brill
Published: Jan 1, 1960
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