A histological study of testis development and ultrastructural features of spermatogenesis in cultured Acrossocheilus fasciatus

Tissue & Cell
Su-Yan FuJun-Quan Zhu

Abstract

Testis development and ultrastructural features of spermatogenesis in Acrossocheilus fasciatus (Cypriniformes, Barbinae), a commercial stream fish, were studied using light and electron microscopy. The reproduction cycle in A. fasciatus testes is classified into six successive stages from Stage I to Stage VI. Based on an analysis of previous results, May to July can be confirmed as the best breeding season for A. fasciatus males. During this time, the A. fasciatus testes are in Stage V and the sperm in males is most abundant. In the first reproductive cycle, sexually mature male testes return to Stage III in October, subsequently overwintering at this stage. In the lobular-type testes of A. fasciatus, cystic type spermatogenesis occurs with restricted spermatogonia. All spermatogenic cells at different stages are distributed along the seminiferous lobules, which contain spermatogonia, spermatocytes, spermatids and spermatozoa. At the end of spermatogenesis, spermatogenic cysts open to release spermatozoa into the lobule lumen. Ultrastructural observation of A. fasciatus spermiogenesis reveals that electron-dense substances appear at the different stages of germ cells, from primary spermatogonia to secondary spermatocytes. We ha...Continue Reading

References

Oct 1, 1986·Journal of Ultrastructure and Molecular Structure Research·O T ThiawB Marchand
Jul 1, 1982·Journal of Ultrastructure Research·G R Poirier, N Nicholson
Feb 1, 1961·The Journal of Biophysical and Biochemical Cytology·J H LUFT
May 26, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Lev FishelsonYakob Delarea
Apr 8, 2009·General and Comparative Endocrinology·Rüdiger W SchulzTakeshi Miura
Nov 1, 2004·Integrative and Comparative Biology·Lynne R Parenti, Harry J Grier
Jan 3, 2012·Micron : the International Research and Review Journal for Microscopy·Joanna Huszno, Jerzy Klag
May 9, 2014·Micron : the International Research and Review Journal for Microscopy·Mônica CasselMahmoud Mehanna

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cardiomyopathy

Cardiomyopathy is a disease of the heart muscle, that can lead to muscular or electrical dysfunction of the heart. It is often an irreversible disease that is associated with a poor prognosis. There are different causes and classifications of cardiomyopathies. Here are the latest discoveries pertaining to this disease.