Interrelationships between sex and ractopamine on protein and lipid deposition in rapidly growing pigs

Sixty pigs were used to investigate the effects of two levels of dietary ractopamine (RAC; 0 and 20 mg/kg) and three sex types (SEX; boars, gilts, and barrows) on performance over the live weight range 60 to 90 kg. Pigs were housed in individual pens and allowed ad libitum access to a diet containin...

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Veröffentlicht in:Journal of animal science 1993-11, Vol.71 (11), p.2919-2930
Hauptverfasser: Dunshea, F.R, King, R.H, Campbell, R.G, Sainz, R.D, Kim, Y.S
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container_end_page 2930
container_issue 11
container_start_page 2919
container_title Journal of animal science
container_volume 71
creator Dunshea, F.R
King, R.H
Campbell, R.G
Sainz, R.D
Kim, Y.S
description Sixty pigs were used to investigate the effects of two levels of dietary ractopamine (RAC; 0 and 20 mg/kg) and three sex types (SEX; boars, gilts, and barrows) on performance over the live weight range 60 to 90 kg. Pigs were housed in individual pens and allowed ad libitum access to a diet containing 3.466 Mcal of DE and 10.7 g of lysine/kg. Control boars exhibited faster and more efficient growth and deposited more protein and less fat than gilts or barrows. The RAC increased ADG by 17 and 21% in gilts and barrows but not in boars. Feed intake was not altered by dietary RAC. Dietary RAC increased the rate of protein deposition by 15, 42, and 41% in boars, gilts, and barrows, respectively. Nevertheless, the daily rate of protein deposition was greatest in RAC-treated boars. The RAC tended to reduce the daily rate of fat deposition by 21% in boars but not in gilts or barrows. Carcass protein content increased by 5% and fat content decreased by 8% in response to RAC. These improvements in carcass composition occurred without compromising meat quality. Results show that RAC is a potent stimulator of protein deposition in finishing pigs. However, increased protein deposition is not necessarily at the expense of fat deposition
doi_str_mv 10.2527/1993.71112919x
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Pigs were housed in individual pens and allowed ad libitum access to a diet containing 3.466 Mcal of DE and 10.7 g of lysine/kg. Control boars exhibited faster and more efficient growth and deposited more protein and less fat than gilts or barrows. The RAC increased ADG by 17 and 21% in gilts and barrows but not in boars. Feed intake was not altered by dietary RAC. Dietary RAC increased the rate of protein deposition by 15, 42, and 41% in boars, gilts, and barrows, respectively. Nevertheless, the daily rate of protein deposition was greatest in RAC-treated boars. The RAC tended to reduce the daily rate of fat deposition by 21% in boars but not in gilts or barrows. Carcass protein content increased by 5% and fat content decreased by 8% in response to RAC. These improvements in carcass composition occurred without compromising meat quality. Results show that RAC is a potent stimulator of protein deposition in finishing pigs. However, increased protein deposition is not necessarily at the expense of fat deposition</abstract><cop>United States</cop><pub>Am Soc Animal Sci</pub><pmid>7903662</pmid><doi>10.2527/1993.71112919x</doi><tpages>12</tpages></addata></record>
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subjects ADDITIF AUX ALIMENTS DES ANIMAUX
Adipose Tissue - growth & development
ADITIVOS DE PIENSOS
Adrenergic beta-Agonists - administration & dosage
Adrenergic beta-Agonists - pharmacology
Animals
Body Composition - drug effects
CALIDAD
CARNE
CARNE DE CERDO
CERDO
COMPOSICION DE LA CANAL
COMPOSITION DE LA CARCASSE
DESEMPENO
Diet
Eating - drug effects
ENGORDE
ENGRAISSEMENT
Female
FIBRAS MUSCULARES
FIBRE MUSCULAIRE
GAIN DE POIDS
GANANCIA DE PESO
Growth Substances - administration & dosage
Growth Substances - pharmacology
Hogs
HORMONAS
HORMONE
INDICE DE CRECIMIENTO
Lipid Metabolism
Lipids
Male
Meat - standards
METABOLITE
METABOLITOS
Muscle Development
Orchiectomy - veterinary
Organ Size - drug effects
Phenethylamines - administration & dosage
Phenethylamines - pharmacology
PLASMA SANGUIN
PLASMA SANGUINEO
PORCIN
Proteins - metabolism
QUALITE
Sex Characteristics
SEXE
SEXO
Swine - growth & development
Swine - metabolism
TAUX DE CROISSANCE
VIANDE
VIANDE PORCINE
Weight Gain - drug effects
title Interrelationships between sex and ractopamine on protein and lipid deposition in rapidly growing pigs
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