TY  - JOUR
T1  - Indigenous Kids` Weight Variation with Respect to non Genetic Factors under Pastoral Mode in Tunisian Arid Region
AU - , Najari Sghaier AU - , Gaddour Amor AU - , Ouni Mabrouk AU - , Abdennabi Mouldi AU - , Ben Hamouda Mohamed 
JO  - Journal of Animal and Veterinary Advances
VL  - 6
IS  - 3
SP  - 441
EP  - 450
PY  - 2007
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2007.441.450
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2007.441.450
KW  - Kids weight
KW  -local population
KW  -arid environment
KW  -non-genetic factors
KW  -pastoral breeding
KW  -Tunisia
AB  - During four years, a weighing program allowed collect about 4900 of data of 722 indigenous kids raised in 9 herds in the Tunisian arid zone under pastoral husbandry mode. A Gompertz model was applied to estimate kids` weights at some standard ages 10, 30, 60, 90, 120, 150 and 180 days. A GLM procedure was applied to decompose the total variance of the kid&#8217;s traits. A means comparison test (SNK,   = 0.05) was applied to identify homogenous class by factor. Results show that the GLM determination coefficient R² remains lower than 87% of all studied traits due to the observed data structure. All traits seem to be affected by the significant effects (p< 0.001 or 0.05) of the factors related to the restrictions and the irregularity of the technical and natural environment of pastoral husbandry. The non-genetic factors impact increases with kids&#8217; age and requirements. Growth traits varied with year, herd, month of birth and natural region. The year factor plays an important role upon the kid&#8217;s weight and it evolution till 6 months age. The sex, birth mode and mother age acts only during first 2 months age. Regarding the birth season effect, regrouping kidding period allows improving herd productivity. So, arid environment affects both quantitatively and qualitatively individual kid&#8217;s growing behaviour and have to be considered for local goat rational genetic improvement modelling and planning.
ER  -