Data/hora: 08/06/2024 08:33:08

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 09/10/1996
Data da última atualização: | 03/04/2017
Autoria: | CHENOWETH, P. J.; FARIN, P. W.; MATEOS, E. R.; RUPP, G. P.; PEXTON, J. E.
Título: | Breeding sounness and sex drive by breed and age in beef bulls used for natural mating.
Ano de publicação: | 1984
Fonte/Imprenta: | Theriogenology, v.22, n.4, p.341-349, Oct. 1984.
Idioma: | Inglês
Conteúdo: | A total of 92 range bulls (Hereford = 60; Angus = 32) were given a breeding soudness examination (BSE) ant two assessment for sex drive prior to their use in 23 breeding trials employing strous synchronized females. Bulls were in three age groups: yearlings (n=29), two year olds (n=36), and three year olds and older (n-27). All yearling bulls were virgins, but the majority of the older bulls had previous mating experience. Angus bulls were superior (P<0.01) to Hereford in spermatozoal morphology and BSE score. Scrotal circumference increased with age beyond two years in Angus bulls but not in Herefords. Spermatozoal abnomalities generally decreased with age. BSE scores did not differ significantly among age groups. Apart from number of mounts, measures of sex drive did not differ with age or breed of bulls. This represents qualified justification for the current practice of using the same sex-drive assessment procedures for Bos taurus bulls of various ages and breeds.
Palavras-Chave: | Beef bull; Breed; Production; Soundness; Touro de corte.
Thesagro: | Criação; Produção.
Thesaurus Nal: | age; libido.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (33163-1) - ADD - SP - PP - SP15038 -  - 15038 - DIS