Fertility of the male alpaca: effect of daily consecutive breeding.
Anim Reprod Sci
; 46(3-4): 305-12, 1997 Apr.
Article
em En
| MEDLINE
| ID: mdl-9231269
The fertility of the male alpaca under different frequencies of daily consecutive matings was evaluated. Fifteen adult male Huacaya alpacas were divided randomly into three groups of five each to breed lactating female alpacas. The schedule of daily matings was two, four and six consecutive breeding per group and for nine consecutive days. Ovulation was determined by progesterone at seven days after breeding. Pregnancy was determined by ultrasonography at 15 and 30 days after breeding. Two hundred and eighty females were bred with some males not fulfilling their schedule of breeding. There were differences (P < 0.05) in the fertility rate of males breeding two and four times daily (76%) in contrast to 59% for males breeding six times. There were also differences (P < 0.05) in the fertility of individual males. Length of copulation was affected (P < 0.05) by schedule of matings, day of breeding and male. Ovulation was independent of length of copulation. Overall, it seems the fertility of the male alpaca is affected significantly when consecutive matings are over four times a day and for nine consecutive days.
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Base de dados:
MEDLINE
Assunto principal:
Cruzamento
/
Camelídeos Americanos
/
Taxa de Gravidez
/
Copulação
/
Fertilidade
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
/
Pregnancy
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article