Growth, feed intake and carcass characteristics of indigenous goats fed local resources in Tunisian arid land
N. Ayeb A B E , M. Seddik A , N. Atti C , M. Atigui A , I. Fguiri A , A. Barmat A , S. Arroum A , M. Addis D , M. Hammadi A and T. Khorchani A
+ Author Affiliations
- Author Affiliations
A Livestock and Wildlife Laboratory, Arid Regions Institute, 4119, Médenine, University of Gabès, Tunisia.
B Institut Supérieur Agronomique, Chott Mariem, Sousse, Tunisia.
C Laboratoire de Productions Animales et Fourragères, INRA-Tunisie, rue HédiKarray, 2049 Ariana, Tunisia.
D Department of Animal Production Research, AGRIS-Sardegna, Bonassai, 07040 Olmedo, Italy.
E Corresponding author. Email: naziha.ayeb@yahoo.fr
Animal Production Science 56(11) 1842-1848 https://doi.org/10.1071/AN14879
Submitted: 17 October 2014 Accepted: 21 April 2015 Published: 21 July 2015
Abstract
Native genetic resource of goats is a pivotal source for meat and milk in southern Tunisia. Feeding is one of the most important activities of goat husbandry. Perceptions on the role of native feed resources for growth and carcass characteristics have not been well studied. Therefore, the present study was designed to help understand and to compare the influences of local forage resources (grass hay, dried olive leaves, Stipa tenacissima and oat hay) on growth performance and carcass characteristics of kids. The kids with the age of 4 months (average live bodyweight of 15 ± 58 kg) were selected for the study. The three study groups in the 90-day trial were as follows: Group C, where animals received oat hay only (control), Group OL, where animals received olive leaves (dried) + S. tenacissima and Group GH, where animals received grass hay. A daily allowance of commercially available concentrate (305 g DM/day) was offered to all groups (making about half of the total DM intake). At the end of the experiment, all animals were slaughtered. Statistical analysis showed that total DM intake was lower (P < 0.001) in C group (490.77 g) than the other two groups having similar DM intake (619.22 and 589.28 g for OL and GH, respectively). Average daily gain was comparable for the three groups (38.33, 40.71 g and 39.52, respectively, for C, OL and GH), with similar final liveweights. Cold carcass weight and carcass yield were not affected by diet treatment. Diet had no significant effect on individual organ weights and carcass composition. The use of the local forage resources evaluated in this trial could be used for the local goat population without loss of productivity when they make up about half of the diet along with a concentrate feed.
Additional keywords: carcass composition, growth performance, local feed resources, native goat genetic resource.
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