Prenatal androgenization of lambs. I. Alterations of growth, carcass characteristics, and metabolites in blood.

Hansen L.R.; Drackley J.K.; Berger L.L.; Grum D.E.

Prenatal androgenization of lambs. I. Alterations of growth, carcass characteristics, and metabolites in blood.

1995

Hansen L.R. | Drackley J.K. | Berger L.L. | Grum D.E.

Eight ewe lambs (TE) born to ewes implanted with testosterone propionate between d 40 and 70 of gestation and 10 ewe lambs (CE) and 10 wether lambs (CW) from non-implanted ewes were used to measure the effects of prenatal androgenization on growth and metabolism. Starting BW (approximately 60 d of age) were not different among treatment groups. Finishing BW of TE and CW tended to be greater (P < 0.10) than those of CE; ADG of TE was 13% greater (P < 0.06) than ADG of CE. The DMI tended to be greater (P < 0.10) for TE than for CE but feed efficiency did not differ among treatments. Carcass weights were greater (P < 0.05) for CW than for CE. Subcutaneous fat, internal fat, and longissimus muscle area were not affected by sex or prenatal androgenization. Increases in glucose concentration in plasma from prefeeding to postfeeding were greater (P < 0.05) for CE than for TE or CW. The concentration of NEFA in plasma decreased (P < 0.05) from growing to finishing stages for TE and CW but remained constant for CE. Plasma glycerol concentration decreased more (P < 0.05) after feeding for TE and CW than for CE. Average concentrations of insulin (P < 0.01) and the increase of insulin after feeding (P < 0.05) were greater for TE and CW than for CE. The average concentration of urea N in plasma tended (P < 0.08) to be greater for CW than for TE or CE. The changes of profiles of energy substrates and insulin in blood of TE indicate a sexually differentiated alteration of the mechanisms that control production and utilization of energy substrates, which may contribute to the improvements of growth and carcass characteristics observed previously in prenatally androgenized ewes.

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Mots clés AGROVOC

acide gras agneau application methods blood plasma blood sugar brebis canal animal carcasse carcasses contenido de materia seca cordero dry matter content engorde engraissement ewes fattening fatty acids feed conversion efficiency feed intake foie gain de poids ganancia de peso glicerol glycerol insulin insulina insuline lambs liver mouton oveja peso plasma sanguin poids sucre du sang tejido adiposo testosteronas testosterone tissu adipeux urea uree weight weight gain wethers

Informations bibliographiques

Publié dans

Journal of animal science

Volume 73 ISSN 0021-8812

Pagination

v.1694-1700(6)

D'autres materias

Carnero; Efficacite alimentaire; Adipose tissues; Plasma sanguineo; Metodos de aplicacion; Performance; Higado; Eficiencia de conversion del pienso; Desempeno; Azucar en sangre; Prise alimentaire animaux; Methode d' application; Ingestion de piensos; Acidos grasos; Teneur en matiere seche

Langue

anglais

Note

references. AVAILABILITY: US (DNAL 49 J82).

Type

Journal Article; Journal Part

Source

Journal-of-animal-science (USA). (Jun 1995). v. 73(6) p. 1694-1700.

Auteur institutionnelle

University of Illinois, Urbana.

Tehran Univ. Faculty of Veterinary Medicine, Tehran (Iran Islamic Republic). Dept. of Basic Sciences.

Sur AGRIS depuis: 2012-11-15

Format: AGRIS AP

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Prenatal androgenization of lambs. I. Alterations of growth, carcass characteristics, and metabolites in blood.

1995

Mots clés AGROVOC

Informations bibliographiques