A study of germ cell morphology and duration of spermatogenic cycle in the baboon, Papio anubis

Abstract

Biopsy and orchiectomy specimens were collected from two adult baboons (Papio anubis) at different intervals after intratesticular injection of H3-thymidine. Zenker-formol or Bouin's fixed materials were stained with PAS-Weigert-Hematoxylin and radioautographed using the H.S.R. (Harleco Synthetic Resin) coating technique. Morphological features of most germ cells appeared similar to those of other monkeys, except that the spermatids in steps 9 to 11 showed a spike-like projection of the acrosome. Also, the type A spermatogonia showed some resemblance to the human type A spermatogonia. The cell associations consisted of 12 stages and a large number of tubular cross sections showed the presence of two or more stages. In Papio anubis, the zygotene spermatocytes are formed in stage VIII, and spermatozoa are released during stages V and VI.

Spermatogenesis in the Non-Scrotal Bat–<i>Rhinopoma kinnear</i><i>i</i> Wroughton (Microchiroptera: Mammalia)

“…Species-specific characteristics with regard to duration of 1 Abstract accepted and read at the Xl,h International Congress of Anatomy, Mexico City, August 20, 1980. spermatogenic cycle, type, size, shape, and population of germ cells, number of cell associations, and the mechanism of stem cell renewal have been described for rat [Leblond and Clermont, 1952a, b;Clermont and Bustos-Obregon, 1968;Huckins, 1971], mice [Oakberg, 1956a[Oakberg, , b, 1971ade Rooij, 1973], golden hamster [de Rooij, 1968], Chinese hamster [Oud and de Rooij, 1977], opossum [Orsi and Ferreira, 1978], Papio [Chowdhury and Steinberger, 1976], Macaca [ Dang, 1971], and man [ Heller and Clermont, 1964], Chiroptera represents the second largest order of mammals in terms of number of species, geographical distribution and popu lation dynamics. Although testicular histoarchitecture and seasonal changes in the germinal epithelium and Leydig tissues have been described in many oriental and occi dental micro-and mega-chiroptera [cf.…”

Frequency of stages of the seminiferous cycle in the thick-tailed bush baby (Otolemur garnetti), a prosimian primate: possible phylogenetic implications?

“…In monkeys, rats and mice, type II associations are more frequently encountered (Hocherereau-de Reviers et al 1990). Of interest too is the observation that in this bush baby, as in the bull and ram (Hochereau-de Reviers et al 1990;Wrobel et al 1995), buck (Onyango et al 2000), monkey (Clermont and Antar 1973), baboon (Chowdhury and Steinberger 1976), chimpanzee and man (Clermont 1963) spermiation occurs prior to the appearance of preleptotene spermatocytes in the seminiferous epithelium. In the rat (Hochereau-de Reviers et al 1990) and hamster (van Haaster and de Rooij 1993); however, appearance of the latter spermatocytes precedes spermiation.…”

“…The seminiferous epithelial cycle has been characterised in various rodents, including rats (Leblond and Clermont 1952a, b;Russell et al 1990;Hess 1990), mice (Oakberg 1956;Russell et al 1990) and hamsters (Leblond and Clermont 1952b;Van Haaster and de Rooij 1993). The same aspect has also been investigated in a number of primates, including macaques (Clermont and Antar 1973), baboon (Chowdhury and Steinberger 1976), lesser bush baby, Galago senegalensis (Pardue 1978), man (Clermont 1963) and chimpanzee . In the species studied to date, there are substantial differences in actual duration of the seminiferous epithelial cycle (Hochereau-de Reviers et al 1990), although comparisons of such temporal differences do not reveal significant information regarding spermatogenesis.…”

Prospects for Sperm Immunocontraceptive Vaccines

“…Second, data exists to the effect that the spermatogenesis in baboon is intermediate to that of human and rodents [47]. The hormonal profiles of female baboons are very similar to that of humans.…”