International Journal of Agricultural Policy and Research
Vol.2 (10),pp.346-351, October 2014
Article 13/ID/JPR168, 06 pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 3.0 International License.
Original Research Article
Caudal epididymal sperm morphology and body measurements relationships of the Gwembe dwarf bucks
*1Mwaanga.S.Edwell.,1Kataba Andrew.,2Pares-Casanova Pere Miquel.,1Phiri Enos and 1Lundu Tapiwa
1Department of Biomedical Sciences, School of Veterinary Medicine, University of Zambia, P.O. Box 32379, Lusaka,Zambia.
2Department of Animal Production, University of Lleida, Av. AlcaldeRoviraRoure, 191.E-25198.Lleida, Catalunya, Spain.
*Corresponding Author Email: e.mwaanga(at)unza.zm
Tel.: +260 978516423/0955751099
Although the Gwembe Dwarf (GD) is the most populous goat-breed in Zambia, not much reproductive information is available. In order to investigate sperm morphological characteristics, and their relationship to body and testicular measurements, 21 GD bucks were considered. The body length (BL), heart girth (HG), body weight (BW) and scrotal circumference (SC) were measured. Thereafter, semen was flushed from caudal epididymis and stained using the Eosin-Nigrosin stain. Stained spermatozoa were examined under light microscope at X40 and X100 magnification where 95.1% and 4.9% live and dead sperm cells were observed, respectively. 62.6% spermatozoa showed no morphological abnormalities while 1.25 and 29.0% had proximal and distal cytoplasmic droplets, respectively. Using a non-parametric Spearman’s correlation, HG, BL and BW were significantly and positively correlated with SC (P<0.05). However, no significant correlation was noted between body measurements with spermatozoa abnormalities. The testicular weight (TW) was negatively and significantly correlated with the double bent tail abnormality (P<0.05). Caudal epididymal semen exhibited minimal morphological abnormalities not significantly correlated to body and testicular measurements. The HG, BL and BW can be indicators of good breeding selection criteria in the GD bucks.
Key words: Gwembe bucks, caudal epididymis, semen morphology, abnormality, body measurements