Proceedings
The observations reported herein are based on the data generated during 1974 to 1979 in the PL-480 project on goats. It involved Jamunapari, Beetal, Barbari, Black Bengal and their crosses. The seasonal rhythms of female reproduction as affected by doe breed, age, type of kidding and production system have been investigated. Goats, in general, have two breeding peaks ♯ May and June, September and November, which together account for over 70 percent of the total matings in a year. Conceptions which usually follow matings are expected to have the same pattern but actually there were more matings (51.37 percent) during the first half of the year and more conceptions during the second half (53.22 percent). The kidding season extended over February-June and October-November when over 80 percent does kidded. The different breeds, however, had considerable variation. Abortions had a concentrated distribution over August-October and January-April. Agewise, while adult does had mostly summer (May-July) matings and conceptions, the young does mated and conceived more in Autumn (September-November) and had more restricted kidding peaks than the adult and the older animals. Abortions were more frequent in adults and during rains. Conceptions occurring in the first half of the year lead to more multiple births than in the second half. Extensive systems had more restricted breeding seasons; the intensive systems had them more uniformly distributed
| Main Authors: | , , , , |
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| Format: | biblioteca |
| Published: |
Scottsdale, AZ (EUA)
1982
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| Subjects: | CAPRINOS, REPRODUCCION, ESTACIONALIDAD, EPOCA DE EMPADRE, PARTO, ABORTO, SISTEMAS DE PRODUCCION ANIMAL, |
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