Growth Patterns of Body and Abdominal Fat Weights in Male Broiler Chickens

Tzeng, Ren-Yu; Becker, Walter A.

doi:10.3382/ps.0601101

Cited by 74 publications

(46 citation statements)

References 8 publications

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“…However, Fernandes et al (2009) supplemented the diet with L-Arg from 1 to 21 days of age, whereas all chickens consumed the same diet without Arg supplementation from 22 to 42 days of age. Therefore, the difference between these two results may be attributed to the timing of the supplementation because the starter phase is associated with a rapid growth rate, but it is not linked to excessive fat deposition in broiler chickens (Tzeng and Becker, 1981). Table 4 shows the TC, HDL-C, LDL-C, TG and NEFA concentrations in the plasma of broilers fed diets containing different levels of L-Arg.…”

Section: Resultsmentioning

confidence: 99%

Dietary L-arginine supplementation reduces abdominal fat content by modulating lipid metabolism in broiler chickens

Fouad

El-Senousey

Yang

et al. 2013

Animal

101

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This study investigated the effects of different levels of dietary L-arginine (L-Arg) supplementation on the abdominal fat pad, circulating lipids, hepatic fatty acid synthase (FAS) gene expression, gene expression related to fatty acid b-oxidation, and the performance of broiler chickens. We tested whether the dietary L-Arg levels affected the expression of genes related to lipid metabolism in order to reduce body fat deposition. A total of 192 broiler chickens (Cobb 500) aged 21 days with an average BW of 920 6 15 g were randomly assigned to four groups (six broilers per replicate and eight replicates per treatment). The control group was fed a basal diet, whereas the treatment groups were fed basal diets supplemented with 0.25%, 0.50%, or 1.00% L-Arg for 3 weeks. The average daily feed intake, average daily gain and feed : gain ratio were not affected by the dietary L-Arg levels. However, chickens supplemented with L-Arg had lower abdominal fat content, plasma triglyceride (TG), total cholesterol (TC) concentrations, hepatic FAS mRNA expression and increased heart carnitine palmitoyl transferase1 (CPT1) and 3-hydroxyacyl-CoA dehydrogenase (3HADH) mRNA expression. These findings suggest that the addition of 0.25% L-Arg may reduce the plasma TC concentration by decreasing hepatic 3-hydroxyl-3-methylglutaryl-CoA reductase mRNA expression. This may lower the plasma TG and abdominal fat content by suppressing hepatic FAS mRNA expression and enhancing CPT1 and 3HADH (genes related to fatty acid b-oxidation) mRNA expression in the hearts of broiler chickens.

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Section: Resultsmentioning

confidence: 99%

Dietary L-arginine supplementation reduces abdominal fat content by modulating lipid metabolism in broiler chickens

Fouad

El-Senousey

Yang

et al. 2013

Animal

101

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“…Examining 4 breeds (White Cornish, New Hampshire, White Leghorn and Orpington), 3 highly inbred lines of White Leghorn, and 9 broiler lines, we found the ratio y + /A to range in value from 0.332 to 0.392 (Knizetova et al, 1983(Knizetova et al, , 1985(Knizetova et al, , 1991a (Ricklefs, 1968(Ricklefs, , 1973 (Ricard, 1975;Marks, 1978;Tzeng and Becker, 1981;Parks, 1982;Zelenka et al, 1986 …”

Section: Growth Patternmentioning

confidence: 99%

Comparative study of growth curves in poultry

Knízetová¹,

Hyánek²,

Hyánková³

et al. 1995

Genet. Sel. Evol.

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“…These models are used as a tool to predict BW with desired carcass characteristics. The Gompertz equation has also been adopted in broiler studies to appropriately describe growth over time (Wilson 1977;Emmans 1995;Hurwitz and Talpaz 1997;Darmani et al 2002) and/or growth of body components in broilers (Tzeng and Becker 1981;Peter et al 1997;Wiseman and Lewis 1998;Gous et al 1999). This equation describes a sigmoidal pattern with slow initial growth followed by acceleration up to a certain age (the inflection point) followed by subsequent decrease in the rate as body weight approaches its maximum near to sexual maturity (Hurwitz and Talpaz 1997).…”

Section: Impact Of Body Composition On Energymentioning

confidence: 99%

“…This equation describes a sigmoidal pattern with slow initial growth followed by acceleration up to a certain age (the inflection point) followed by subsequent decrease in the rate as body weight approaches its maximum near to sexual maturity (Hurwitz and Talpaz 1997). Tzeng and Becker (1981) fitted the nonlinear Gompertz equation to abdominal fat, intending to predict total carcass fat over time (Becker et al 1979). Usually the methods for evaluating the growth of body components in broiler studies using the Gompertz model have been carried out for extended periods of time up to 10 to 16 wk (Tzeng and Becker 1981;Peter et al 1997;Wiseman and Lewis 1998;Gous et al 1999).…”

Section: Impact Of Body Composition On Energymentioning

confidence: 99%

“…Tzeng and Becker (1981) fitted the nonlinear Gompertz equation to abdominal fat, intending to predict total carcass fat over time (Becker et al 1979). Usually the methods for evaluating the growth of body components in broiler studies using the Gompertz model have been carried out for extended periods of time up to 10 to 16 wk (Tzeng and Becker 1981;Peter et al 1997;Wiseman and Lewis 1998;Gous et al 1999). Under these conditions, the asymptotic values of liveweight or body components are obviously better estimated.…”

Section: Impact Of Body Composition On Energymentioning

confidence: 99%

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Review: Energy partitioning in broiler chickens

López¹,

Leeson²

2008

Can. J. Anim. Sci.

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Lopez, G. and Leeson, S. 2008. Review: Energy partitioning in broiler chickens. Can. J. Anim. Sci. 88: 205Á212. In commercial nutrition and in research studies, metabolizable energy (ME) is the standard measure of energy used in describing energy requirements and diets for poultry. The provision of dietary energy will influence the intake of all other nutrients. Broilers exhibit an outstanding ability to control their energy intake by adjusting their feed intake as diet energy concentration changes. There is still considerable debate on the accuracy, precision and usefulness of different procedures used for determining ME values of diets and ingredients. ME intake is generally partitioned into energy retained (ER) in body tissues (mainly as fat and protein) and as heat production (HP): ME 0HP'ER. There are few reported estimates of HP and its components, fasting heat production (FHP), heat production due to physical activity and the thermic effect of feeding (TEF). Requirements for maintenance (MEm), including major components of FHP and physical activity, are established at around 155 kcal kg BW 0.60 . We recently reported that maintenance requirements for young broilers based on kg BW 0.75 were 8% lower than the values estimated using kg BW 0.60 , and that BW raised to the exponent 0.60, was a more precise estimator. Gross energy retained in the body as fat (TERF) and protein (TERP), together contribute most of the total energy retained (TER) in the body. Efficiency of ME utilization above maintenance varies from 70 to 84% for lipid deposition in adult birds and between 37 and 85% in growing birds.Key words: Energy, broiler, metabolic rate, energy retention Lopez, G. et Leeson, S. 2008. Re´partition de l'e´nergie chez le poulet de chair. Can. J. Anim. Sci. 88: 205Á212. L'e´nergie me´tabolisable (EM) est l'e´talon habituellement employe´en nutrition, tant dans le commerce qu'en recherche, pour de´crire les besoins d'e´nergie de la volaille et l'e´nergie contenue dans les aliments. L'e´nergie des aliments exerce une influence sur l'ingestion des autres e´le´ments nutritifs. Les poulets de chair montrent une capacite´e´tonnante en modifiant la quantited 'aliment inge´re´e en fonction de la concentration d'e´nergie dans la ration. L'exactitude, la pre´cision et l'utilite´des diverses me´thodes servant a`de´terminer la quantite´de EM dans la ration et ses composantes font toujours l'objet d'une vive pole´mique. En ge´ne´ral, on re´partit la EM inge´re´e en plusieurs e´le´ments, a`savoir l'e´nergie retenue (ER) dans les tissus de l'organisme (principalement sous forme de matie`re grasse et de prote´ines) et celle libe´re´e sous forme de chaleur (CH), EM 0CH'ER. On a relativement peu estime´la CH et ses composantes, soit la chaleur produite durant le jeuˆne (CHJ), celle re´sultant de l'activite´physique et l'effet thermique duˆa`l'alimentation (ETA). On fixe les besoins d'entretien (EMe), qui incluent la CHJ et l'activite´physique, autour de 155 kcal par kg de poids corporel (PC) multiplie´par l'exposant 0,60. Le...

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Growth Patterns of Body and Abdominal Fat Weights in Male Broiler Chickens

Cited by 74 publications

References 8 publications

Dietary L-arginine supplementation reduces abdominal fat content by modulating lipid metabolism in broiler chickens

Dietary L-arginine supplementation reduces abdominal fat content by modulating lipid metabolism in broiler chickens

Comparative study of growth curves in poultry

Review: Energy partitioning in broiler chickens

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