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Effect of supplementation with agro-industrial by-products and Khat (Catha edulis) leftovers on testicular growth and sperm production in Ogaden bucks
Swedish University of Agriculture Science, Sweden.
International Livestock Research Institute (ILRI), PO Box 5689, Addis Ababa, Ethiopia.
Swedish University of Agriculture Science, Sweden.ORCID iD: 0000-0002-5194-2124
2007 (English)In: Journal of Veterinary Medicine A, ISSN 0931-184X, E-ISSN 1439-0442, Vol. 54, no 3, 147-155 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to characterize growth and sperm production parameters in Ogaden bucks fed a basal diet of hay and supplemented with agro-industrial by-products and Khat leftovers in Ethiopia. Thirty-five bucks with a mean ( SD) initial live body weight (BW) of 15.5 +/- 1.5 kg were randomly assigned to one of four dietary treatments for a period of 13 weeks. Treatments consisted of native hay fed ad libitum (control; C), native hay supplemented with a 1% of BW agroindustrial by-products (treatment 1; T1), native hay supplemented with Khat (Catha edulis) leftovers at a rate of 1% of BW (treatment 2; T2) and Khat leftovers fed ad libitum (treatment 3; T3). Bucks fed on T1-T3 had higher BW, body condition score, scrotal circumference (SC), testicular width and testicular length, compared to controls (P less than 0.05). Also, bucks in T1-T3 had higher sperm progressive motility, sperm concentration per ml and total number of spermatozoa per ejaculate compared to controls (P less than 0.05). Between treatments, bucks in T3 recorded the highest BW (17.2 +/- 0.16) and testicular size (21.1 +/- 0.17 cm). Both testicular and epididymal weight and dimensions were significantly affected (P less than 0.05) by supplementation compared to controls. Testicular size was positively correlated to live BW (r = 0.53, P less than 0.001). SC was positively correlated with ejaculate volume (r = 0.37, P less than 0.001), sperm mass activity (r = 0.65, P less than 0.001) and individual sperm progressive motility (r = 0.40; P less than 0.001). Supplementation with Khat leftovers induced the highest improvement in live BW, testicular size, semen production and sperm motility in Ogaden bucks and can possibly be considered as a feed supplement to enhance goat production under smallholder livestock farming system in Ethiopia.

Place, publisher, year, edition, pages
Wiley-Blackwell , 2007. Vol. 54, no 3, 147-155 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-101782DOI: 10.1111/j.1439-0442.2007.00876.xISI: 000245505500009OAI: diva2:666787
Available from: 2013-11-24 Created: 2013-11-22 Last updated: 2015-03-12

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Rodriguez-Martinez, Heriberto
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