Comparative Assessment of Milt Quality of Three Populations of Clarias Gariepinus (Burchell, 1822) Broodstock
Publication Date: 06/11/2018
Author(s): Odo Sabastine Nnanna, Alozie E.C., Anyanwu E.D..
Volume/Issue: Volume 1 , Issue 1 (2018)
Abstract:
This study was aimed at assessing the semen characteristics of both wild and cultured Clarias gariepinus broodstocks and associated determinants. Fifteen (15) male broodstocks were selected from 3 study populations; with weight ranges of 500 to 900g. The fish were dissected and the gonads were removed. The gonads were assessed for pH, motility, volume, morphology, microbiological characteristics and sperm concentration. The data were analysed using ANOVA while Duncan Multiple Range Test was used to separate the means. The sperm characteristics (tapering head, long tails, weight of gonads and progressive motility) assessed had the best results from Joshua Fish Farm, followed by Michael Okpara University Fish Farm and the Wild Fish Stock. The microbial load was highest among the Wild Fish Stock compared to other populations. This study has shown that broodstock fed consistently with good quality feed had best sperm quality. Other environmental factors such as pH, temperature, and water quality may also affect the quality of the sperm.
