Effect of social rank in hair rams on the number of lambs sired and their postnatal development

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-09-15T00:30:07Z
Fecha de publicación2025-01-01
ResumenThe impact of social rank among hair rams on reproductive efficiency has been extensively studied, particularly regarding its influence on ewes and rams under various lambing scenarios, both within and outside the breeding season. However, limited information exists on the specific effects of social rank on lamb paternity. The present study aimed to evaluate the influence of social rank during a 35 d mating period on paternity outcomes and the postnatal development of lambs during the breeding season. A total of 108 adult ewes were divided into six groups, with 18 ewes per group. Each group was paired with two rams: one dominant ram (DRam) and one subordinate ram (SRam). Lamb development was monitored from birth through weaning and up to 150 d of age. Paternity was determined for 107 lambs using a panel of 116 single-nucleotide polymorphism (SNP) markers to assign sires from among the 12 rams included in the study. Social rank showed significant differences in lambing outcomes depending on the type of birth ( P <0.05). DRams sired 67 % of lambs, while SRams sired 33 %. DRams exhibited a significantly higher proportion of twin births (52.9 %) compared to SRams (32.4 %; P <0.01). However, no significant differences were observed between the ram groups for other lambing types. Lambing type also significantly influenced lamb weight gain, with single-born lambs achieving greater weight gain than twins and triplets ( P <0.05). Additionally, lamb sex ratios differed significantly between ram groups, with DRams producing a higher proportion of male lambs (50.7 %) compared to SRams (41.2 %; P <0.05). This study demonstrates that social rank significantly affects reproductive outcomes, including lamb paternity, lambing type, birth weight and body weight at 3 months of age. These findings highlight the importance of considering social hierarchy when managing breeding programs to optimize reproductive efficiency in hair sheep production systems.es_ES
Doihttps://doi.org/10.5194/aab-68-151-2025es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/2041
Idiomaeses_ES
EditorialCopernicus GmbHes_ES
RelaciónArchives Animal Breedinges_ES
URL relacionadohttps://doi.org/10.5194/aab-68-151-2025es_ES
DerechosAcceso abierto (PDF local verificado)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuenteArchives Animal Breeding
TítuloEffect of social rank in hair rams on the number of lambs sired and their postnatal developmentes_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
AutorGarza-Brenner, Estela
AutorSánchez-Dávila, Fernando
AutorHernández-Melendez, Javier
AutorMauleon-Tolentino, Keyla
AutorLedezma-Torres, Rogelio Alejandro
AutorGonzález-Delgado, Marisol
AutorLuna-Palomera, Carlos
AutorZapata-Campos, Cecilia C.
AutorVazquez-Armijo, José Fernando
AutorGarza-Brenner, Estelaes_ES
AutorSánchez-Dávila, Fernandoes_ES
AutorHernández-Melendez, Javieres_ES
AutorMauleon-Tolentino, Keylaes_ES
AutorLedezma-Torres, Rogelio Alejandroes_ES
AutorGonzález-Delgado, Marisoles_ES
AutorLuna-Palomera, Carloses_ES
AutorZapata-Campos, Cecilia C.es_ES
AutorVazquez-Armijo, José Fernandoes_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número1es_ES
Rango de páginas151-159es_ES
URL relacionadahttps://doi.org/10.5194/aab-68-151-2025
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen68es_ES

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