Yahaya et al. 2017

Sokoto Journal of Veterinary Sciences, Volume 15 (Number 3). December, 2017

 

Testicular morphometry and sperm reserves of local turkey toms fed varying levels of protein in the diet

MS Yahaya1*, AI Nwannenna2, ST Fadason3 & PI Rekwot4

1.                  Department of Theriogenology and Animal Production, Faculty of Veterinary Medicine, Usmanu Danfodiyo University, Sokoto, Nigeria

2.                  Department of Theriogenology and Production, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria

3.                  Department Surgery and Radiology, Faculty of Veterinary Medicine, Ahmadu Bello University Zaria, Nigeria

4.                  National Animal Production Research Institute, Ahmadu Bello University, Zaria, Nigeria

 

 

*Correspondence: Tel.: +2348069796802; E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Abstract

The morphometry and sperm reserves of the testis, epididymis and vas deferens of three groups (n=5/ group) of sexually active adult local turkey toms fed isocaloric diet with varying levels (12 %, 16 %, 20 %) of protein were studied for sixteen weeks. The weights of the toms before treatment were between 3.5 – 4.5 kg, while at the end of the experiment the mean ± SD live weight were 5.29 ± 0.65, 5.39 ± 0.45 and 5.63 ± 0.49 kg for groups 1, 2 and 3 respectively. The mean ± SD weights of the paired tunics, testis, epididymis and vas deferens, respectively, were 0.41 ± 0.11 g, 8.27 ± 2.37 g, 0.28 ± 0. 07 g and 0.36 ± 0.11 g (group 1): 0.43 ± 0.02 g, 8.50 ± 0.65 g,  0.33 ± 0.11 g and 0.40 ± 0.11 g (group  2) and: 0.49 ± 0.16 g, 9.83 ± 3.08 g, 0.40 ± 0.13 g and 0.50 ± 0.18 g, (group 3). The mean ± SD lengths of the testes were: 3.72 ± 0.34 cm, 4.40 ± 0.47 cm and 4.48 ± 1.14 cm; the epididymis: 3.12 ± 0.56 cm, 3.17 ± 0.67cm and 3.48 ± 0.49 cm,  and the vas deferens: 17.27 ± 1.10 cm, 17.33 ± 0.93 cm and 17.49 ± 1.10 cm, for groups 1, 2 and 3, respectively. Mostly, the parameters of the left organs were greater than those of the right. The mean ± SD weight of the testes positively correlated with that of the epididymis in all the groups (r = 0.72, 0.65 and 0.87 for groups 1, 2 and 3 respectively) and the vas deferens (r = 0.54, 0.72 and 0.75 for groups 1, 2 and 3 respectively). The gonadal sperm reserves were 0.19 ± 0.00 x 109 cells/ml, 0.21 ± 0.00 x 109 cells/ml and 0.21 ± 0.00 x 109 cells/ml for groups 1, 2 and 3 respectively. The mean ± SD extragonadal sperm reserves were, epididymis: 0.08 ± 0.00 x 109 cells/ml, 0.12 ± 0.01 x 109 cells/ml, 0.18 ± 0.00 x 109 cells/ml, and vas deferens: 2.00 ± 0.13 x 109 cells/ml, 2.82 ± 0.50 x 109 cells/ml and 3.75 ± 0.60 x 109 cells/ml for the three groups respectively. The vas deferens had about 88 %, of the extragonadal sperm reserve in group 1 and 90 % in groups 2 and 3. Sperm reserve was positively correlated to body weight and to the length of the testis. The results suggest, therefore, that morphometry and sperm reserves were better in turkey toms fed 16 % and 20 % than 12 % protein diets.

Keywords: Crude protein, Fertility, Morphometry, Reproduction, Sperm reserves, Turkey tom

Online Stats

We have 49 guests and no members online

Site Stats

Visitors
3
Articles
275
Web Links
5
Articles View Hits
555114