Amor Gaddour

• Maitre-assistant et chercheur
• Docteur at Arid Land Institute Medenine Tunisia

Up until now, the composition of goat's milk has not been well known. However, every day it is more and more evident that this milk is quite different from cows and other mammal's milk. This difference depends on a major concentration in some of milk elements. Caseins, in goat's milk are found in a minor concentration (their inner components have b...

The objective of this study is to determine the physicochemical composition quality of goat milk for its turn in flavored yogurt. Indeed, goat's milk is a food interesting nutritional and dietary values. This study shows that the pH of goat milk is similar to that of cow's milk, they are average respectively 6.70 and 6.75, therefore, they have diff...

L’importance particulière de la chèvre locale, en tant que ressource génétique indispensable pour la valorisation des parcours des régions arides, incite à déployer des efforts pour sa caractérisation et la mise au point de méthodologies de son amélioration génétique. La présente étude vise l'établissement des caractéristiques phénotypiques et géné...

Résumé : Le croisement d'absorption de la chèvre locale par des races amélioratrices vise la création de nouveaux génotypes caprins ayant une bonne productivité dans les oasis. La présente étude vise l'évaluation de comportement génétique et productif de la chèvre locale dans un schéma d'amélioration génétique. L'objectif est d'estimer l'importance...

Résumé. La présente étude a porté sur l'analyse du poids adulte de 180 chèvres adultes âgées d'un à dix ans appartenant au troupeau expérimental de l'Institut des Régions Arides de Médenine. La base de données est constituée d'un total de 579 observations obtenues durant sept campagnes successives (1998/1999 à 2004/2005). Le poids moyen des chèvres...

Five non-linear statistical models were tested to fit the growth curve parameters of the kids of indigenous, Alpine and Damascus goats and their crosses. Data from 16 years’ periodical weight study was used to adjust the growth curve of 1,687 suckling kids before they attained the age of five months. Among the tested models, the iterative procedure...

Dans les zones arides tunisiennes, les performances laitières de la chèvre locale synthétisent les capacités génétiques de la population et l’impact des facteurs naturels difficiles. L’objectif de cette étude est l’identification des sources de variation des performances de la chèvre locale. Les données utilisées sont issues de 10 campagnes de cont...

Data carried out from 10 local goat herds' survey was analyzed to establish the impact of the management mode upon local goat performances in the aim to identify the possibilities to improve goat milk and meat production via the flock management handling. A total of 8257 kids' weights and 3461 dairy performances were elaborated and statistically an...

To identify some genetic specificities of goat meat production in southern Tunisia, 16 years field growth data of 1687 kids were analysed. Data distribution was studied to establish the performance regrouping pattern towards oasian breeding conditions depending on the kid's age. The average kid's weight was 3.11 and 13.14 kg, respectively, at birth...

To identify some genetic specificities of goat meat production in southern Tunisia, 16 years data monitoring of 1687 kids' growth were analysed. Data distribution was studied to establish the performances regrouping pattern toward oasian breeding conditions depending on the kid's age. The average kid's weight was 3.11 and 13.14 kg, respectively at...

The comparison of different caprine genotypes' productivity remains limited by the technical and zootechnical parameters used to evaluate the individual animal performances such as kid's growth, goat lactation or herd reproduction. Data issued from 16 years of periodical animal survey of a herd compound from local goats, pure breeds and crosses was...

Najari, S. and Gaddour, A. 2010. Impacts of the herd management mode upon the indigenous goat potentialities in oases and rangelands of southern Tunisia J. Appl. Anim. Res., 37: 281–284.To assess the flocks' annual productive rates and individual performances both in a pastoral system and in oases under intensified conditions data obtained from a r...

The pure and crossed caprine breeds comparison aims to identify the better genotypes allowing the oasian resources valorization through a local goat crossbreeding. The individual growth and dairy performances of Alpine, Damascus and Murciana breeds are insufficient to conclude on the genetic and economic interest for the paternal breed choice. The...

It was evaluated in this study the environmental effects on body weights of goat kids from birth to 150 days of age of Tunisian local goat population, on the basis of 1,656 records obtained from the Arid Areas Institute of Médenine, Tunisia, during 2001-2005. Except for birth weight, individual records were adjusted for standard ages (30, 60, 90, 1...

From 1980, the development project within the framework of genetic improvement achieved significant progress through crossbreeding of local goats with imported improver races at the Institute of the Arid Areas of Medenine. This article summarizes the performances of the various genotypes produced since 1980. The crossing between these goat races ap...

Najari, S., Gaddour, A. and Glley, K. 2010. Impact of weighing data structure on the adjustment of the local kids' growth curve under pastoral conditions in Southern Tunisia. J. Appl. Anim. Res., 37: 63–66.Six non-linear models; Brody, Logistic, Gompertz, Janoschek, Von Bertalanffy and Polynomial equations were tested to identify the suitable model...

Data from 16 years performances schedule of local goat, Alpine, Damascus, Murciana and crossed groups were used to study the genotypes productive behaviour under Tunisian oases conditions. The aim was to evaluate the possibilities of local goat productivity improvement by cross-breeding in intensive mode and also, to choose the better improving bre...

Gaddour, A., Najari, S. and Ferchichi, A. 2009. Lactation curve of local goat, pure breds and crosses in southern Tunisia. J. Appl. Anim. Res., 36: 153–157.The gamma function was used to fit lactation curve of local goat, pure breds and crosses under southern Tunisian conditions. Data of 16 years of 993 adult dairy milk goats was analyzed to adjust...

Gaddour, A. and Najari, S. 2008. Adjustment of the kid's growth curve in pure goat breeds and crosses under southern Tunisian conditions. J. Appl. Anim. Res., 34: 117–120.Five non-linear statistical models, Gompertz, Brody, Richards, Logistic and Polynomial, were tested to fit the kid's growth curve parameters and shape of indigenous goat, Alpine,...

La comparaison des races pures caprines et des génotypes issus de croisement d’absorption de la chèvre locale par des races amélioratrices a pour but de déterminer les meilleurs génotypes caprins qui permettent la valorisation des ressources des oasis. L’étude des performances individuelles de croissance des chevreaux de la population locale, des r...

Data corresponding of 276 local kids' periodic control, harvested during 4 years (2001-2005) under pastoral mode in Tunisian arid region, was used to study some factors effects upon body parts evolution after birth. Morphostructural variables were; body length, height-at-withers and heart girth. The linear measurement periodically registered at eve...

During 4 years, about 3378 body parts measurements were harvested for different birth mode of 149 males and 127 females of indigenous kids raised under pastoral arid conditions at some standard ages: birth, 30, 60, 90, 120 and 150 days. Data was used to establish local kid`s stature growth after the birth and till 20 weeks` age. The study focused t...

Depuis 1980, un projet de croisement d’absorption de la chèvre locale Capra hircus, issue de la race Nubienne, par des races amélioratrices importées, a été mis en place dans une oasis d’une région aride de la Tunisie en vue d’améliorer la production laitière en élevage oasien intensif. L’analyse des performances laitières de certaines races caprin...

A data issued from 16 years performances schedule of local goat, Alpine, Damascus, Murciana and crossed groups was used to study the genotypes productive behaviour under Tunisian oases conditions. The aim is to evaluate the possibilities of local goat productivity improvement by cross breeding in intensive mode and also, to choose the better improv...

In order to improve goat productivity in the arid regions of Tunisia, a crossing scheme of the local goat population by high performance breeds was applied under oases conditions. To cross local population, Alpine, Damascus and Murciana Granadina breeds were imported and used as paternal genotypes in several cross generation. The survey of pure bre...

Data collected during four years periodic control on 276 indigenous kids was used to study morphometric linear growth of 17 body parts under arid zone pastoral conditions. The aim is to establish the kinetic of the kids` stature growing, from birth till five months age and the impact of some non genetic factors as a step of the local goat populatio...

About 5000 individual weights issued from periodical survey of 722 indigenous kids in 8 herds and during 4 years were analyzed in the present study. The aim is to identify the non genetic effects upon the growth curve of local goat population raised under arid conditions as a necessary step to improve kids` meat production on range lands. The Gompe...

The type and frequency of local goat milk casein αS1 and αS2 alleles was studied using about 150 individual milk and goat blood samples. The study starts the establishment of the local goat population genetic molecular characterization through the casein gene polymorphism. Genotypic and allelic individual DNA composition was realized by molecular a...

About 5000 kid`s weights registered during four years in 9 herds raised in the Tunisian arid area were used in the aim to identify some genetic specificities of the local population productive behaviour towards harsh conditions. The analysis of kid`s growth under arid regions conditions shows a particular aspect of the genotypes expression in arid...

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 study aim was to establish meat and dairy performance of local goats, some breeds and cross-bred groups under an oasis management mode in southern Tunisian. A large data set, collected from 1980 to 1996, was used to analyse the phenotypic potential of the genotypes. Periodic individual controls were used to estimate kids-goat weight at some s...

Five non-linear statistical models were tested to fit the growth curve parameters of the kids of indigenous, Alpine and Damascus goats and their crosses. Data from 16 years' periodical weight study was used to adjust the growth curve of 1,687 suckling kids before they attained the age of five months. Among the tested models, the iterative procedure...