5 research outputs found
Performances de reproduction et production laitiĂšre de croisĂ©s MontbĂ©liarde x NâDama du ââProjet Laitier Sudââ (CĂŽte dâIvoire)
Dans la perspective de lâamĂ©lioration de la production de lait, des vaches hybrides issues de croisements MontbĂ©liarde x Nâdama, obtenues par insĂ©mination artificielle ont Ă©tĂ© utilisĂ©es. Les performances de reproduction et de production laitiĂšre de ces bovins ont Ă©tĂ© Ă©valuĂ©es dans le « Projet Laitier Sud » en CĂŽte dâIvoire. LâĂ©tude a portĂ© sur 66 vaches reparties de la maniĂšre suivante : Ferme A (20 vaches), Ferme B (17 vaches) et Ferme C (19 vaches). Des paramĂštres de reproduction (Age au premier vĂȘlage et Intervalle entre vĂȘlages) et de production laitiĂšre (DurĂ©e de lactation, DurĂ©e de la pĂ©riode de tarissement, Lactations partielles et Lactation totale) ont Ă©tĂ© mesurĂ©s. Le premier vĂȘlage est intervenu Ă 38,3 ± 5,0 mois dâĂąge en moyenne. Lâintervalle entre vĂȘlage a diminuĂ© avec le nombre de vĂȘlage et est restĂ© proche de celui du parent Nâdama. Le croisement a eu pour effet de rĂ©duire les Ă©carts de variation des durĂ©es de lactation et de tarissement chez les hybrides comparativement Ă celles du parent Nâdama. Ce mĂ©tissage a permis Ă©galement une augmentationsensible de la production laitiĂšre sans pour autant atteindre la moyenne des races parentales. LâamĂ©lioration de la production laitiĂšre doit ĂȘtre assujettie aux conditions environnementales, Ă la technicitĂ© et la conduite de lâĂ©levage.Mots clĂ©s : AmĂ©lioration gĂ©nĂ©tique, croisement, lait, paramĂštres zootechniques
Croisement de la race nâdama avec les races abondance et montbĂ©liarde en zone tropicale humide de cĂŽte divoire : caractĂ©risation phĂ©notypique et analyse comparative des croisĂ©s pour leurs performances laitiĂšres en ferme
Cent trente-quatre (134) vaches (66 F1 N'Damance, 28 F1 MontbĂ©liarde et 40 3/4 MontbĂ©liarde) de six (6) fermes laitiĂšres dans la rĂ©gion sud de la CĂŽte d'Ivoire, ont Ă©tĂ© caractĂ©risĂ©es Ă l'aide des caractĂšres morphologiques et de production. Les donnĂ©es collectĂ©es ont Ă©tĂ© soumises aux analyses multivariĂ©es (factorielle discriminante et en composante principale). Les vaches se distinguent au mieux par leur format (pĂ©rimĂštre thoracique, longueur de l'animal et longueur du museau), leur productions moyenne de lait et Ăąge au premier vĂȘlage. Ces trois types gĂ©nĂ©tiques de vaches constituent des populations homogĂšnes stables en Ă©levage laitier dans la rĂ©gion sud de la CĂŽte d'Ivoire. A l'exception de leur Ăąge au premier vĂȘlage qui est de 35,7 ± 0,78 mois pour les F1 N'Damance et 40,4 ± 1,33 mois pour les F1 MontbĂ©liarde, ces derniers prĂ©sentent des similitudes par leurs caractĂšres physiques et de production. Ces deux types gĂ©nĂ©tiques se caractĂ©risent par la longueur de leur corps et pĂ©rimĂštre thoracique allant respectivement, de 181,64 ±1,63 cm Ă 184,65 ± 1,28 cm pour les F1N'Damance et de 165,33 ± 1,19 cm Ă 167,02 ± 1,66 cm pour les F1 MontbĂ©liarde. Cependant, avec une production moyenne de 5,2 ± 0,25 litres de lait par jour et un Ăąge au premier vĂȘlage de 34,8 ± 1,28, les vaches 3/4 MontbĂ©liarde sont plus productives que les F1 N'Damance et MontbĂ©liarde (4,5 litres de lait par jour). Les 3/4 MontbĂ©liarde prĂ©sentent ainsi les avantages comparatifs liĂ©s au niveau de sang exotique, pour la production et le croisement en Ă©levage laitier en CĂŽte d'Ivoire.Mots clĂ©s : Croisement laitier, bovin, caractĂ©risation, performance, CĂŽte d'Ivoire.English Abstract Crossbreeding nâdama breed with abondance and montbeliarde breeds in humid tropical environment of CĂŽte dâIvoire : phenotypical characterization and on-farm comparative analyses of the crossbred for their dairy performancesOne-hundred thirty four (134) crossbred dairy cows (F1 N'Damance 66, F1 MontbĂ©liarde 28 and 3 / 4 MontbĂ©liarde 40 ) from six (6) smallholder dairy farms in south of CĂŽte d'Ivoire, have been characterized using physical and production traits. The collected data have been studied using discriminant factorial and principal component analysis. The cows distinguish themselves to the best by their format (heart girth, length of the animal and muzzle), their average milk production and the age at first calving.These three genetic types constitute three homogeny and stable population in dairy cattle breeding in CĂŽte d'Ivoire. Except for the age at first calving of F1N'Damance (35,7± 0,78 month) and F1MontbĂ©liarde(40,4 ± 1,33 month), both genetic types had similar physical and milk production performance. The F1 N'Damance and F1 MontbĂ©liarde cows characterize themselves by their heart girth and body length, which vary respectively from 181,64 ± 1,63 cm to 184,65 ± 1,28 cm for F1 N'Damance and from 165,33 ± 1,19 cm to167,02 ± 1,66 cm for F1 MontbĂ©liarde. Moreover, for an average milk production to 5,2 ± 0,25 litres per day and an average age at first calving 34,8 ± 1,28),the 3/4 MontbĂ©liarde cows are more productive than F1 N'Damance and F1 MontbĂ©liardecows (4,5 litresmilk per day). Then 3/4 MontbĂ©liarde has a comparative advantage for milk production and crossbreeding in cattle dairy breeding in CĂŽte d'Ivoire.Keywords : Dairycrossbreeding, cattle,characterization, performance, CĂŽte d'Ivoir
An echographic study of follicular growth during induced estrus in female Azawak zebu in Niger
Molecular characterization of trypanosomes isolated from naturally infected cattle in the "Pays Lobi" of CĂŽte dâivoire
Objectives: this study aimed to investigate the prevalence of bovine trypanosomosis in the ââPays Lobiââ of CĂŽte dâIvoire where a lot of trypanosusceptible zebu cattle are now found.Methodology and Results: Blood samples were collected from 200 male and female cattle sampled in five villages from the department of Bouna. PCR technique was used for the diagnosis of trypanosomes. Out of the 200 animals examined, 41 were infected with trypanosomes, representing an infection prevalence of 20.5 %. The specific diagnosis revealed prevalence rates of 2.5 %, 3 %, 5 %, 10 % for T. congolense ââSavannahââ, T. conglense ââForestââ, T. vivax and T. brucei, respectively. Three mixed infections were found involving T. congolense ââSavannahââ and T. brucei, T. congolense ââForestââ and T. vivax, T. vivax and T. brucei.Conclusions and applications of findings: The outcome of this study has shown that more attention is needed in controlling trypanosome infection in the ââPays Lobiââ. Indeed, better understanding of prevalence of sub- clinical infection could help with efforts to control the disease and population-based screening of both animal and insect vectors.Key words: Prevalence, Trypanosomes, trypanosusceptible, zebu; ââPays Lobiâ
Caractérisation des bovins de race Baoulé dans le ''Pays Lobi" de CÎte d'Ivoire: rÎles socio-économiques, modes d'élevage et contraintes de production
Characterization of BaoulĂ© Cattle in the "Pays Lobi" of Ivory Coast: Socioeconomic Roles, Management Practices, and Production Constrainsts. This study aimed at determining the socioÂeconomic roles, the traditional management practices, and the production constraints of the BaoulĂ© cattle. It was conducted in Bounkani region of NorthÂEastern Ivory Coast, using a semiÂstructured questionnaire. The results indicate that most (62.7 percent) of the respondents depended on crop and livestock production for household income and food security. Farmers of this region (60 percent) use the BaoulĂ© cattle owing to their multiple socioÂeconomic functions, adaptive qualities, and low management requirements. The BaoulĂ© cattle are primarily reared for ritual ceremonies, gifts and as security against the vicissitudes of life. Farmers (98.41 percent) use natural pasture without supplementation. In the North  Eastern of Ivory Coast, livestock rearing tends to be made according to the demand of zebu cattle, due to the secondary interest given to BaoulĂ© cattle. This leads Lobi farmers to breed BaoulĂ© with zebu cattle and to invest in the health of animals because Zebu and crossÂbred Zebu x BaoulĂ© are more sensitive than the BaoulĂ© cattle to animal trypanosomiasis. In view of the multiple functions of BaoulĂ© cattle, their specific genetic characteristics and the threat of absorption hanging over it, this local resource should be preserved and valued for its sustainable utilization