Extériorisation des potentialités génétiques du zébu Peulh sénégalais (Gobra)

Denis, Jean-Pierre; Valenza, Jean

doi:10.19182/remvt.7736

Cited by 4 publications

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“…La production laitière totale moyenne de la femelle Gobra est de 400 à 500 kg au cours d'une lactation qui ne dépasse pas 5 à 6 mois. Chez les Pakistanaises, elle est de 1 147 ± 126 kg pour une durée de lactation moyenne de 8 mois (9).…”

Section: Cadre D'étudeunclassified

Production laitière dans la zone sylvopastorale du Sénégal : étude des facteurs de variation et modes de gestion par les populations locales

Diop

Ickowicz²,

Diene³

et al. 2009

Rev. Elev. Med. Vet. Pays Trop.

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Dans la région sahélienne du Sénégal, la production laitière des systèmes pastoraux connaît des variations interannuelles et intra-annuelles du fait que l’alimentation du cheptel est basée presque exclusivement sur les ressources naturelles. Les études menées à partir d’un dispositif de suivi dans les campements d’éleveurs et en station, et des données de la société Nestlé ont montré que la production laitière était fortement liée à la date de démarrage de la collecte, mais faiblement à la pluviométrie totale. La relation entre la production laitière totale et les indices de végétation normalisés (NDVI) était de type polynomial. Le pic de la production a été atteint au moment où la teneur en eau des fourrages a été de 70 p. 100. Des enquêtes auprès de pasteurs (hommes et femmes) appartenant à différentes ethnies et résidant dans les différents soussystèmes de production (Walo, Djoloff et Ferlo) ont indiqué que la durée de lactation, le nombre de vaches et les espèces animales ont constitué les principaux facteurs de variation de la production laitière. En fonction de l’ethnie à laquelle ils appartenaient, différents acteurs ont été responsables de la gestion du lait. Le caillage et l’extraction du beurre ont constitué les deux modes de conservation, et cinq types de calebasses ont été utilisés lors du processus. Les produits laitiers occupaient encore une place importante dans les revenus agricoles et le lait caillé écrémé était le produit le plus commercialisé.

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Section: Cadre D'étudeunclassified

Production laitière dans la zone sylvopastorale du Sénégal : étude des facteurs de variation et modes de gestion par les populations locales

Diop

Ickowicz²,

Diene³

et al. 2009

Rev. Elev. Med. Vet. Pays Trop.

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“…Earlier studies on zebu Gobra, a lyre-horned zebu raised primarily by Fulani herds have characterized their growth traits (Sow et al, 1988;Diop and Van Vleck, 1998) and their nutritional responses under different environmental conditions like on pasture (Guerin et al, 1988) and in relation to different types of diets using locally available crops and agroindustrial by-products (Denis and Valenza, 1971;Valenza et al, 1971;Calvet et al, 1973;Steyaert et al, 1989). In most of these studies, attention has not been focused on the cattle body condition although it is, in fact, empirically evaluated by traditional farmers.…”

Section: Introductionmentioning

confidence: 99%

Change in body condition of Gobra zebu cattle under different level of feeding. Relationship with body lipids and energy

Cissé¹,

Ditaroh²,

Korréa³

et al. 2003

J. Anim. Feed Sci.

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Thirty six zebu steers (35 Gobra and 1 Maure), 2.5 years-old on average, were equally alloted in 3 groups fed different crop by-product based diets. For diets 1 and 2, molassed rice straw and molassed millet straw were offered ad libitum as a basal diet while the other ingredients were mixed and given (2.5 kg/animal/d) as supplement 1 and 2, respectively. In diet 3, all ingredients were mixed and given as a compound feed. The energy content was higher in diet 3 (0.83 FU/kg DM) than in diet 1 and 2 which were isoenergetic, 0.65 and 0.63 FU/kg DM, respectively. Animals were group-fed twice daily (at 08.00 and 16.00 h) during 3.5 months. Diets offered and refusals were daily measured. Cattle were monthly weighed, their body condition was scored using 2 scales of 6 (BCS 0-5 ) and 9 (BCS 1-9 ) points, and body lipids and energy were estimated. The level of intake of steers was 101, 94.3, and 148.3 g DM/d/BW 0.75 for the 1 rst , 2 nd and 3 rd groups, respectively. Groups 1 and 2 had average daily gain similar (ADG) (446.7 and 425.5 g BW/animal, respectively) and gain in BCS 0-5 (+0.8 points) and in BCS 1-9 (+1.9 points). A spectacular development of the hump was observed in cattle of the 3 rd group which was submitted to the richest diet. They also gained more (P<0.01) weight (AOG : 1012 g BW/animal), BCS 0-5 (+1.9 points) and BCS 1-9 (+3.5 points) than did the others groups. Increased rate of BW gain resulted in an acceleration of body lipids deposits (22.8 kg in the 3 rd group vs 11.5 kg in the 1 rst and 11.6 kg in the 2 nd group) and in gain in body net energy (936.6 MJ in the 3 rd group vs 473.9 MJ in the 1 rst and 490.3 MJ in the 2 nd groups). Each kg of gain in BW contains on average 264.7 g of lipids and 11.4 MJ of net energy.

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Long‐Term Body Weight Trends in Gobra Zebu Cattle Reared at the ‘Centre de Recherches Zootechniques’ of Dahra (Senegal): A Historical Perspective (1952–2018)

Sambe,

Diouf,

Ciss

et al. 2024

Veterinary Medicine & Sci

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The socio‐economic impact of rearing Gobra zebu cattle in rural areas has yet to be demonstrated in Senegal. This impact was evident in the 1950s when a genetic breeding programme for this breed was initiated by the ‘Centre de Recherches Zootechniques’ of Dahra. The management of animals in this programme has evolved considerably, particularly due to the constraints encountered and the progressive acquisition of knowledge about the animals. This study aims to describe the evolution over time of the weight performance of Gobra zebu cattle reared at the Dahra station. The study utilizes all body weight monitoring data of the animals maintained at the centre from 1952 to 2018. The data were analysed based on age, sex, year of birth and the selection scheme in force at the time of the animal's birth. The average body weights observed in this study are as follows: 23.3 kg at birth, 69.3 kg at 3 months, 106.08 kg at 6 months, 145.9 kg at 1 year, 225.1 kg at 2 years, 294.9 kg at 3 years, 327.06 kg at 4 years and about 350 kg at ages over 4 years. Significant differences in average body weights were noted depending on sex and the selection scheme in place. These results are supported by various research studies conducted at the Dahra station.

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Extériorisation des potentialités génétiques du zébu Peulh sénégalais (Gobra)

Abstract: cf. fichier PDF de l'article.

Cited by 4 publications

References 0 publications

Production laitière dans la zone sylvopastorale du Sénégal : étude des facteurs de variation et modes de gestion par les populations locales

Production laitière dans la zone sylvopastorale du Sénégal : étude des facteurs de variation et modes de gestion par les populations locales

Change in body condition of Gobra zebu cattle under different level of feeding. Relationship with body lipids and energy

Long‐Term Body Weight Trends in Gobra Zebu Cattle Reared at the ‘Centre de Recherches Zootechniques’ of Dahra (Senegal): A Historical Perspective (1952–2018)

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