Annual cyclical changes in the testicular activity of a freshwater teleost, Barbus luteus (Heckel) from Shatt-Al-Arab, Iraq |
| |
| Authors: | M. Nazir Bhatti Najim K. Al-Daham |
| |
| Affiliation: | Department of Fisheries and Marine Resources, College of Agriculture, University of Basrah, Basrah, Iraq |
| |
| Abstract: | The testes of Barbus luteus are a pair of elongated structures composed of an anastomosing system of seminiferous lobules. Six spermatogenetic stages of germ cells have been described in the gonad. The endocrine factor lies in the interstitial cells. Spermiation occurs during the months of May, June and July. Fertilization appears to be external. Un-expelled spermatozoa undergo pycnotic degeneration. The testes show a regular annual cycle which has been described in five arbitrary stages. |
| |
| Keywords: | |
|
|
