Management of photoperiod to control caprine reproduction in the subtropics.
Reprod Fertil Dev
; 16(4): 471-8, 2004.
Article
em En
| MEDLINE
| ID: mdl-15315746
ABSTRACT
Reproductive seasonality is observed in some breeds originating from or adapted to subtropical latitudes. In 'photoperiodic flexible breeds', such as Australian cashmere goats, the annual breeding season can be manipulated through nutrition, whereas in 'photoperiodic rigid breeds', such as Creole goats from subtropical Mexico, sexual activity can be controlled by altering the photoperiod. In males from the latter breed, artificial long days, whether or not accompanied by the administration of melatonin, stimulate sexual activity during the non-breeding season. These treated males are able to induce the sexual activity of anoestrous females through the male effect under intensive or extensive conditions. Photoperiodic treatments and the male effect can be easily integrated into different breeding management systems in subtropical latitudes.
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Bases de dados:
MEDLINE
Assunto principal:
Reprodução
/
Cruzamento
/
Cabras
/
Fotoperíodo
Limite:
Animals
Idioma:
En
Revista:
Reprod Fertil Dev
Assunto da revista:
MEDICINA REPRODUTIVA
Ano de publicação:
2004
Tipo de documento:
Article