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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
12/04/1996 |
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Data da última atualização: |
14/01/2026 |
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Autoria: |
GREEN, D. A.; BRINK, D. R.; BAUER, M. L. |
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Título: |
Characterization of feed intake and estradiol-17 β during gestation and lactation in twin-bearing ewes. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 13, n. 2, p. 153-158, Mar. 1994. |
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DOI: |
https://doi.org/10.1016/0921-4488(94)90091-4 |
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Idioma: |
Inglês |
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Conteúdo: |
The role of estradiol-17Betha (E2) in the regulation of feed intake was investigated in two trials. Trial 1, ten twin-bearing Rambouillet ewes (64 kg, breeding weight) were individually fed corn silage ad libitum daily during the last 60 d of gestation and the first 30 d of lactation. Jugular blood samples were collected weekly for E2 analysis. ln trial 2, ovariectomized Rambouillet ewes (64 kg) were administered implants containing Ez (n = 9) or sham implanted (n = 9). Implants were made from three 15-cm lengths of silastic tubing (3.35 mm i.d., 4.65 mm o.d.). Individual daily ad libitum corn silage intake was determined. Feed intake decreased (linear, P<0.02; quadratic, P<0.02) during gestation and increased (quadratic, P<0.01) during lactation. Feed intake decreased as concentrations of E2 in plasma increased (r= -0.46; P < 0.01) during gestation. ln trial 2, implantation of E2 decreased feed intake (time X treatment, P<0.01). Concentrations of E2 in plasma were higher (P<0.01) in E2 than in sham-implanted ewes ( 16.6 Ys. < 2 pg/ ml, respectively). Increased concentrations of E2 in plasma during late gestation appeared to be an important factor involved in decreased feed intake. |
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Palavras-Chave: |
Voluntario. |
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Thesagro: |
Consumo; Lactação; Nutrição; Ovino. |
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Thesaurus Nal: |
Feed intake; Gestation period; Lactation; Rambouillet; Ruminant nutrition; Sheep feeding. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02055naa a2200289 a 4500
001 1516482
005 2026-01-14
008 1994 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/0921-4488(94)90091-4$2DOI
100 1 $aGREEN, D. A.
245 $aCharacterization of feed intake and estradiol-17 β during gestation and lactation in twin-bearing ewes.$h[electronic resource]
260 $c1994
520 $aThe role of estradiol-17Betha (E2) in the regulation of feed intake was investigated in two trials. Trial 1, ten twin-bearing Rambouillet ewes (64 kg, breeding weight) were individually fed corn silage ad libitum daily during the last 60 d of gestation and the first 30 d of lactation. Jugular blood samples were collected weekly for E2 analysis. ln trial 2, ovariectomized Rambouillet ewes (64 kg) were administered implants containing Ez (n = 9) or sham implanted (n = 9). Implants were made from three 15-cm lengths of silastic tubing (3.35 mm i.d., 4.65 mm o.d.). Individual daily ad libitum corn silage intake was determined. Feed intake decreased (linear, P<0.02; quadratic, P<0.02) during gestation and increased (quadratic, P<0.01) during lactation. Feed intake decreased as concentrations of E2 in plasma increased (r= -0.46; P < 0.01) during gestation. ln trial 2, implantation of E2 decreased feed intake (time X treatment, P<0.01). Concentrations of E2 in plasma were higher (P<0.01) in E2 than in sham-implanted ewes ( 16.6 Ys. < 2 pg/ ml, respectively). Increased concentrations of E2 in plasma during late gestation appeared to be an important factor involved in decreased feed intake.
650 $aFeed intake
650 $aGestation period
650 $aLactation
650 $aRambouillet
650 $aRuminant nutrition
650 $aSheep feeding
650 $aConsumo
650 $aLactação
650 $aNutrição
650 $aOvino
653 $aVoluntario
700 1 $aBRINK, D. R.
700 1 $aBAUER, M. L.
773 $tSmall Ruminant Research$gv. 13, n. 2, p. 153-158, Mar. 1994.
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