INTRODUCTION Bolomys lasiurus (=Zygodontomys lasiurus) (Lund, 1841) is a vole-like cricetid rodent commonly found in large areas of Northeastern, Central and Southeastern Brazil (Karimi et al. 1976; Streilein 1982; Valle et al 1982; Borchert and Hansen 1983; Dietz 1983 ; Nitikman and Mares 1983 : Alho and Pereira 1985 ; Macedo and Mares 1987 ; Henriques and Alho 1991). In spite of the broad geographical distribution of this species and its potential use as a laboratory animal in biomedical research (Mello and Cavalcanti 1982), the few available data on its male reproductive biology are those arised from the external observation of the topographical position of the gonads (Mello 1980 ; Streuen 1982 ; Dietz 1983 ; Alho and Pereira 1985). Regarding the spermatogeMummalia, t. 57,;/° J . 1993. nie function along the annual reproductive cycle, virtually no information exists for Bolomys lasiurus* as well as for Brazilian rodent species in general. In a previous work (Parreira and Cardoso 1991), some kinetic aspects of the male gametogenesis, mainly the cycle of the seminiferous epithelium, were studied in Bolomys lasiunis. Now we present quantitative histological data in order to verify the degree of seasonal variation of the spermatogenic activity in
Mammalia - International Journal of the Systematics, Biology and Ecology of Mammals – de Gruyter
Published: Jan 1, 1993
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