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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
07/11/2023 |
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Autoria: |
TERRILL, C. E.; STOEHR, J. A. |
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Título: |
Reproduction in range sheep. |
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Ano de publicação: |
1939 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 1939, n. 1, p. 369-375, Dec. 1939. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: A study has been made of reproduction in range sheep involving the records of breeding and lambing for nearly 8,000 matings over a period of 10 years at the U. S. Sheep Experiment Station, Dubois, Idaho. This study was undertaken to provide data on the normal reproductive rate of these sheep and to determine the influence of factors such as age, methods of management, feed conditions, etc., upon reproduction in sheep kept under range conditions. The rate of reproduction is one of the chief limiting factors to selection in breeding for improvement and must be taken into consideration in plans for selection and mating. Determination of the influence of various environmental factors upon reproduction is basic to the development of methods for increasing fertility or maintaining high fertility. Material and Methods Breeding and lambing records of Rambouillet, Corriedale, Columbia, and Targhee ewes bred in pens at the U, S. Sheep Experiment Station to known sires for the 10-year period from 1929 to 1938 have been analyzed. |
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Thesagro: |
Ovino; Reprodução. |
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Thesaurus Nal: |
Range livestock; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01547naa a2200193 a 4500
001 1522041
005 2023-11-07
008 1939 bl uuuu u00u1 u #d
100 1 $aTERRILL, C. E.
245 $aReproduction in range sheep.$h[electronic resource]
260 $c1939
520 $aAbstract: A study has been made of reproduction in range sheep involving the records of breeding and lambing for nearly 8,000 matings over a period of 10 years at the U. S. Sheep Experiment Station, Dubois, Idaho. This study was undertaken to provide data on the normal reproductive rate of these sheep and to determine the influence of factors such as age, methods of management, feed conditions, etc., upon reproduction in sheep kept under range conditions. The rate of reproduction is one of the chief limiting factors to selection in breeding for improvement and must be taken into consideration in plans for selection and mating. Determination of the influence of various environmental factors upon reproduction is basic to the development of methods for increasing fertility or maintaining high fertility. Material and Methods Breeding and lambing records of Rambouillet, Corriedale, Columbia, and Targhee ewes bred in pens at the U, S. Sheep Experiment Station to known sires for the 10-year period from 1929 to 1938 have been analyzed.
650 $aRange livestock
650 $aReproduction
650 $aSheep
650 $aOvino
650 $aReprodução
700 1 $aSTOEHR, J. A.
773 $tJournal of Animal Science$gv. 1939, n. 1, p. 369-375, Dec. 1939.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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