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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: |
08/11/2023 |
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Autoria: |
LINDSAY, D. R.; ROBINSON, T. J. |
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Título: |
Studies on the efficiency of mating in the sheep. I. The effect of paddock size and number of rams. |
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Ano de publicação: |
1961 |
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Fonte/Imprenta: |
Journal Agricultural Science, v. 57, n. 1, p.137-140, Aug. 1961. |
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DOI: |
https://doi.org/10.1017/S0021859600050115 |
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Idioma: |
Inglês |
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Conteúdo: |
A factorial experiment is described in which seventy-two spayed crossbred ewes were used in four successive tests at intervals of 15 days in a study of factors affecting the detection of oestrus. Variates introduced in each test were: (a) number of rams to eighteen ewes (one or three); (b) size of mating paddock (17 acres or acre); (c) dose of oestrogen (oestradiol benzoate, ODB: 10·0, 15·6, 24·4 ?g.). All ewes were primed with progesterone for 12 days prior to ODB injection and joining. The number of ewes detected in oestrus and the mean number of ewes served per ram were recorded. In the four successive tests, thirty-two, fortyseven, forty-six and forty-one ewes were served (P < 0·05). Three rams working together detected ninety-eight ewes in oestrus while rams working individually detected sixty-eight (P < 0·001). Size of mating paddock had no significant effect (17 acres, 89; Jacre, 77). The mean number of ewes marked per ram when used singly was indistinguishable from the mean number when rams were in groups of three (8·5 and 9·3). This resulted in multiple coverage of oestrous ewes when group joined (average 2·3 rams per ewe). |
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Palavras-Chave: |
Comportamento reprodutivo; Manejo reprodutivo. |
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Thesagro: |
Ovino; Reprodução. |
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Thesaurus Nal: |
Anestrus; Animal reproduction; Crossbreds; Estrus detection; Ewes; Progesterone; Reproductive behavior; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02027naa a2200289 a 4500
001 1523226
005 2023-11-08
008 1961 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1017/S0021859600050115$2DOI
100 1 $aLINDSAY, D. R.
245 $aStudies on the efficiency of mating in the sheep. I. The effect of paddock size and number of rams.$h[electronic resource]
260 $c1961
520 $aA factorial experiment is described in which seventy-two spayed crossbred ewes were used in four successive tests at intervals of 15 days in a study of factors affecting the detection of oestrus. Variates introduced in each test were: (a) number of rams to eighteen ewes (one or three); (b) size of mating paddock (17 acres or acre); (c) dose of oestrogen (oestradiol benzoate, ODB: 10·0, 15·6, 24·4 ?g.). All ewes were primed with progesterone for 12 days prior to ODB injection and joining. The number of ewes detected in oestrus and the mean number of ewes served per ram were recorded. In the four successive tests, thirty-two, fortyseven, forty-six and forty-one ewes were served (P < 0·05). Three rams working together detected ninety-eight ewes in oestrus while rams working individually detected sixty-eight (P < 0·001). Size of mating paddock had no significant effect (17 acres, 89; Jacre, 77). The mean number of ewes marked per ram when used singly was indistinguishable from the mean number when rams were in groups of three (8·5 and 9·3). This resulted in multiple coverage of oestrous ewes when group joined (average 2·3 rams per ewe).
650 $aAnestrus
650 $aAnimal reproduction
650 $aCrossbreds
650 $aEstrus detection
650 $aEwes
650 $aProgesterone
650 $aReproductive behavior
650 $aSheep
650 $aOvino
650 $aReprodução
653 $aComportamento reprodutivo
653 $aManejo reprodutivo
700 1 $aROBINSON, T. J.
773 $tJournal Agricultural Science$gv. 57, n. 1, p.137-140, Aug. 1961.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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