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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: |
29/11/2023 |
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Autoria: |
PARSONS, S. D.; HUNTER, G. L. |
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Título: |
Effect of the ram duration of oestrus in the ewe. |
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Ano de publicação: |
1967 |
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Fonte/Imprenta: |
Journal of Reproduction and Fertility, v. 14, n. 1, p. 61-70, Aug. 1967. |
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DOI: |
10.1530/jrf.0.0140061 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: A series of experiments is reported in which the effect on the length of heat of varying degrees of association of the sexes was studied in Merino sheep. Length of heat in all ewes was determined by teasing with vasectomized rams at 4-hr intervals. When present throughout oestrus, mating behaviour of rams and also of stilboestrol-treated (`masculinized') ewes, reduced heat length in experimental ewes by some 30 to 50%. The sight, smell and sound of the rams were not sufficient to reduce the duration of oestrus. However, neither mounting nor intromission were necessary components of the male behaviour for the effect to be fully expressed. Oestrous periods synchronized by injections of progesterone were as effectively shortened by the continuous presence of the rams. The ewes were most sensitive to the effect of ram activity between 4 and 8 hr after the beginning of oestrus, but oxytocin treatment during this time did not reduce oestrous duration. |
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Palavras-Chave: |
Comportamento reprodutivo. |
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Thesagro: |
Ovino; Reprodução. |
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Thesaurus Nal: |
Animal behavior; Animal reproduction; Diethylstilbestrol; Estrus; Oxytocin; Pharmacology; Pregnancy; Progesterone; Reproductive behavior; Seasons; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01823naa a2200313 a 4500
001 1519728
005 2023-11-29
008 1967 bl uuuu u00u1 u #d
024 7 $a10.1530/jrf.0.0140061$2DOI
100 1 $aPARSONS, S. D.
245 $aEffect of the ram duration of oestrus in the ewe.$h[electronic resource]
260 $c1967
520 $aAbstract: A series of experiments is reported in which the effect on the length of heat of varying degrees of association of the sexes was studied in Merino sheep. Length of heat in all ewes was determined by teasing with vasectomized rams at 4-hr intervals. When present throughout oestrus, mating behaviour of rams and also of stilboestrol-treated (`masculinized') ewes, reduced heat length in experimental ewes by some 30 to 50%. The sight, smell and sound of the rams were not sufficient to reduce the duration of oestrus. However, neither mounting nor intromission were necessary components of the male behaviour for the effect to be fully expressed. Oestrous periods synchronized by injections of progesterone were as effectively shortened by the continuous presence of the rams. The ewes were most sensitive to the effect of ram activity between 4 and 8 hr after the beginning of oestrus, but oxytocin treatment during this time did not reduce oestrous duration.
650 $aAnimal behavior
650 $aAnimal reproduction
650 $aDiethylstilbestrol
650 $aEstrus
650 $aOxytocin
650 $aPharmacology
650 $aPregnancy
650 $aProgesterone
650 $aReproductive behavior
650 $aSeasons
650 $aSheep
650 $aOvino
650 $aReprodução
653 $aComportamento reprodutivo
700 1 $aHUNTER, G. L.
773 $tJournal of Reproduction and Fertility$gv. 14, n. 1, p. 61-70, Aug. 1967.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
