title: Chronology of meiosis and spermiogenesis in a fresh-water teleost fish, Colisa fasciata (Bloch and Schneider).
abstract: The duration of individual stages of meiosis and spermiogenesis in Colisa fasciata (Bloch and Schneider) was calculated autoradiographically by following the kinetics of H3-TdR labelled spermatocytes in vivo. The leptotene lasts for less than 0.5 day, zygotene even for shorter period and pachytene for 1.86 +/- 0.13 days. The transition from diplotene to anaphase II requires about a day. The spermiogenesis is completed within 6.43 days. The labelled spermatozoa were detected at 9.68 d post injection, which is the approximate total duration of meiosis and spermiogenesis.
mesh_terms: D000818:Animals; D001345:Autoradiography; D005399:Fishes / Q000502:physiology*; D008297:Male; D008540:Meiosis; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology; D013997:Time Factors