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Impact of Body Reserves Dynamic on Productivity and Reproductive Performance in Fat-Tail and Thin-Tail Sheep Breeds over Contrasting Production Cycles.
Yagoubi, Yathreb; Smeti, Samir; Mahouachi, Mokhtar; Nasraoui, Massara; Ben Saïd, Samia; Mohamed-Brahmi, Aziza; Atti, Naziha.
Afiliación
  • Yagoubi Y; Laboratoire des Production Animale et Fourragère, Institut National de la Recherche Agronomique de Tunisie, University of Carthage, Rue Hedi Karray, Ariana 2049, Tunisia.
  • Smeti S; Laboratoire des Production Animale et Fourragère, Institut National de la Recherche Agronomique de Tunisie, University of Carthage, Rue Hedi Karray, Ariana 2049, Tunisia.
  • Mahouachi M; Appui à la Durabilité des Systèmes de Production Agricoles du Nord-Ouest, Ecole Supérieure d'Agriculture du Kef, University of Jendouba, Le Kef 7119, Tunisia.
  • Nasraoui M; Laboratoire des Production Animale et Fourragère, Institut National de la Recherche Agronomique de Tunisie, University of Carthage, Rue Hedi Karray, Ariana 2049, Tunisia.
  • Ben Saïd S; Appui à la Durabilité des Systèmes de Production Agricoles du Nord-Ouest, Ecole Supérieure d'Agriculture du Kef, University of Jendouba, Le Kef 7119, Tunisia.
  • Mohamed-Brahmi A; Appui à la Durabilité des Systèmes de Production Agricoles du Nord-Ouest, Ecole Supérieure d'Agriculture du Kef, University of Jendouba, Le Kef 7119, Tunisia.
  • Atti N; Laboratoire des Production Animale et Fourragère, Institut National de la Recherche Agronomique de Tunisie, University of Carthage, Rue Hedi Karray, Ariana 2049, Tunisia.
Animals (Basel) ; 14(6)2024 Mar 14.
Article en En | MEDLINE | ID: mdl-38539989
ABSTRACT
Under climate change, animal breeding faces severe nutritional challenges, exhibiting their resilience and efficiency to survive and produce. The animals' robustness can be evaluated through the use and reconstitution of body reserves (BR). This study investigated the dynamics of ewes' BR, measured through body weight (BW) and the body condition score (BCS), and their effect on production performances of 480 ewes belonging to fat-tailed Barbarine (BB) and thin-tailed Queue Fine de l'Ouest (QFO) ewes over two consecutive years. The BW and BCS were recorded across physiological stages. Reproductive parameters and lambs' growth were calculated. For both years and breeds, the decrease in the BCS between mating and lambing showed BR mobilization to balance nutritional restrictions, which continues until suckling; after weaning, a BR accretion was noted. The lambs' birth weight was similar regardless of the dams' BCS at lambing, though it was lower in the second year (3.5 vs. 4 kg). Lambs' growth parameters depended on ewes' BCS at lambing and weaning. Fertility rates changed with BCS changes and the higher values (80%) were recorded for ewes with BCSs between 2 and 2.5. However, prolificacy was similar for both breeds and years (p > 0.05). In conclusion, ewes have developed adaptative capacities through BR mobilization to cope with environmental challenges and successfully rear their offspring. To maintain a high offspring growth rate, it is recommended to plan correct flock nutrition during suckling.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Animals (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Animals (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Suiza