Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
01/08/1992 |
Data da última atualização: |
06/11/2023 |
Autoria: |
PHILLIPS, R. W.; SIMMONS, V. L.; SCHOTT, R. G. |
Título: |
Observations on the normal estrous cycle and breeding season in goats and possibilities of modification of the breeding season with gonadotropic hormones. |
Ano de publicação: |
1943 |
Fonte/Imprenta: |
American Journal Veterinary Research, v. 4, p. 360-367, 1943. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Observations on 87 [female] Toggenburg and Saanen goats in the herd at the Belts-ville Research Center, Beltsville, Md., and records on 300 [female] [female] listed by the American Milk Goat Record Association indicate that most does will come in estrus regularly between about the middle of Sept. and the middle of Dec. Some does continue to come in estrus through Feb. and Mar., but only an occasional doe exhibits estrus in the late spring and summer months. The season during which most does can be bred with reasonable certainty appears to be limited to about 3 months in the fall. Observations on 161 estrous cycles showed that the average length of the cycle was 22.8 and 23 days in dry and milking does, respectively, and 16.6 days in kids. There was considerable variation, however, and the greatest number of cycles fell between 18 and 24 days. A considerable group also fell between 2 and 12 days. Some long cycles occurred which appeared to be multiples of the most frequently observed length. Preliminary work with 20 does indicates that there is some possibility of stimulating the ovaries with gonadotropic hormones (P.M.S. and L.H.) outside the usual breeding season, thereby making it possible to provide a more uniform milk supply throughout the year. Further work is needed to develop a procedure that can be used with reasonable certainty in practice. |
Palavras-Chave: |
Epoca; Gonadatrofina; LH; PMS. |
Thesagro: |
Acasalamento; Caprino; Ciclo Estral; Hormônio; Reprodução. |
Thesaurus Nal: |
Endocrinology; Estrous cycle; Goats; Gonadotropins; Hormones; Luteinizing hormone; Pregnant mare serum gonadotropin; Reproduction; Seasons. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02409naa a2200361 a 4500 001 1520928 005 2023-11-06 008 1943 bl uuuu u00u1 u #d 100 1 $aPHILLIPS, R. W. 245 $aObservations on the normal estrous cycle and breeding season in goats and possibilities of modification of the breeding season with gonadotropic hormones.$h[electronic resource] 260 $c1943 520 $aAbstract: Observations on 87 [female] Toggenburg and Saanen goats in the herd at the Belts-ville Research Center, Beltsville, Md., and records on 300 [female] [female] listed by the American Milk Goat Record Association indicate that most does will come in estrus regularly between about the middle of Sept. and the middle of Dec. Some does continue to come in estrus through Feb. and Mar., but only an occasional doe exhibits estrus in the late spring and summer months. The season during which most does can be bred with reasonable certainty appears to be limited to about 3 months in the fall. Observations on 161 estrous cycles showed that the average length of the cycle was 22.8 and 23 days in dry and milking does, respectively, and 16.6 days in kids. There was considerable variation, however, and the greatest number of cycles fell between 18 and 24 days. A considerable group also fell between 2 and 12 days. Some long cycles occurred which appeared to be multiples of the most frequently observed length. Preliminary work with 20 does indicates that there is some possibility of stimulating the ovaries with gonadotropic hormones (P.M.S. and L.H.) outside the usual breeding season, thereby making it possible to provide a more uniform milk supply throughout the year. Further work is needed to develop a procedure that can be used with reasonable certainty in practice. 650 $aEndocrinology 650 $aEstrous cycle 650 $aGoats 650 $aGonadotropins 650 $aHormones 650 $aLuteinizing hormone 650 $aPregnant mare serum gonadotropin 650 $aReproduction 650 $aSeasons 650 $aAcasalamento 650 $aCaprino 650 $aCiclo Estral 650 $aHormônio 650 $aReprodução 653 $aEpoca 653 $aGonadatrofina 653 $aLH 653 $aPMS 700 1 $aSIMMONS, V. L. 700 1 $aSCHOTT, R. G. 773 $tAmerican Journal Veterinary Research$gv. 4, p. 360-367, 1943.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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