Lipolytic Diet to Control Carcass Fat Deposition of Growing Chicks

Yoshida, Minoru; Hoshii, Hiroshi; Morimoto, Hiroshi

doi:10.2141/jpsa.7.166

Cited by 3 publications

(4 citation statements)

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“…These results are in agreement with the reports of Yoshida et al (1966Yoshida et al ( , 1970 and Yoshida and Morimoto (1970a, b). These investigators used diets which contained extremely high and low protein concentrations and some of their experiments were performed with Leghorn chicks.…”

Section: Discussionsupporting

confidence: 94%

“…Through these studies it was established that, as the dietary C : P ratio was widened, energy intake and carcass fat deposition increased, while body water content decreased. Yoshida et al (1966Yoshida et al ( , 1970 and Yoshida and Morimoto (1970a, b) have reported that the effect of dietary protein concentration on carcass fat content is rapid and reversible. Thomas and Twining (1971), too, observed considerable changes in carcass fat content, as early as 10 d after alterations were made in protein concentrations.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

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Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹

Bartov

Bornstein

Lipstein

1974

British Poultry Science

124

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Section: Discussionsupporting

confidence: 94%

Section: Please Scroll Down For Articlementioning

confidence: 99%

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹

Bartov

Bornstein

Lipstein

1974

British Poultry Science

124

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“…To examine the reliability of a method for the control of protein and energy retentions in the carcass, the authors compared the amounts of protein and energy retentions measured by carcass analysis (denoted as measured value in the text) in rats given 9 diets shown in Table 1 with the amounts of protein and energy retentions calculated (denoted as calculated value in the text) by putting the values of DCP and ME intakes shown in Table 1 into multiple regression equations (1) and (2).…”

Section: Reliability Of a Methods For The Control Of Protein And Energmentioning

confidence: 99%

A Method for the Control of Protein and Energy Retentions in Growing Rats

Saitoh¹,

Takahashi²,

Kameoka³

1980

Nihon Chikusan Gakkaiho

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A method for the control of protein and energy retentions in the carcass was proposed using rats in this study. Twelve diets were prepared by combining 4 ME levels and 3 DCP levels. Twelve grams of each diet was offered daily to rats. The rats were slaughtered at day 20 of experiment and protein and energy retentions were determined by carcass analysis. Regression equations between nutrient intake and nutrient retention were determined by multiple regression analysis. The relationship between ME and DCP intakes in each equation obtained by setting energy or protein retention in these regression equations to optional values was drawn a figure. This figure shows that energy and protein retentions in the carcass vary in the pattern as suddle point and ridgeline of a mountain with the changes of ME and DCP intakes, respectively. The amounts of ME and DCP intakes required for making energy and protein retentions in the carcass into optional values can be determined by reading the values of ME and DCP intakes corresponding to the intersecting points of both curves of energy and protein retentions. It was confirmed that a method proposed in this study is reasonable by animal experiment.Jpn. J. Zoolech. Sci., 51 (6): [422][423][424][425][426][427][428] 1980 Protein and energy retentions in the carcass are important factors in meat production. It has been established that carcass fat of the animals decreases with the increase of dietary protein or with the decrease of dietary energy1-5) and the simultaneous change in both energy and protein is most effective6-8). It has been also known that as the dietary protein is raised, the lean proportion appears to increase steadily4), but there is a top limit beyond which additional protein will not further increase carcass leanness9).

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“…Through the subsequent studies (BARTOV et al, 1974;COMBS et al, 1964: EDWARD'S andHART, 1971;SPRING and WILKINSON, 1957;SKINNER et al, 1992;SUMMERS et al, 1965;YOSHIDA et al, 1970), it has been established that fat increase in practical type diets unavoidably causes excessive energy consumption because feed intake decline is not proportional to the increase of dietary energy density.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dietary Protein Level on Carcass Composition of Broilers at 5 to 15 Days of Age.

Koide

Ishibashi

1995

Jpn. poult. sci.

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Few reports have been available concerning the relationship between dietary protein level and body composition of broilers at starting stage (0-3 weeks of age) under the same metabolizable energy (ME) condition. Preceding determination of the amino acid requirement of broilers using body weight gain as a main criterion, the effects of dietary crude protein (CP) on the carcass composition of broilers were studied.To the experimental diets mainly consisting of corn, whole egg protein was added as a good protein source to contain 3,200 kcal ME/kg and 6 levels of CP from 12.1 to 21.1% arithmetically. Five broilers for each diet were fed ad libitum the experimental diets from 5 to 15 days of age after nutritional effects of yolk sack decreased. On the 15th day, they were sacrificed after recording the body weight and feed consumption, and moisture, fat, protein and ash contents of the carcass were determined.The body weight gains reached the maximum level at 16.2% CP and the feed efficiency reached the maximum level at 15.0% CP.Percentage of the carcass moisture (Y1), protein (Y2) and ash (Y3) increased linearly and, to the contrary, that of fat (Y4) decreased linearly with increasing the dietary CP level as follows: Y1=0.284X+61.27(r2=0.658) Y2=0.236X+11.50(r2=0.606) Y3=0.266X-0.86(r2=0.939) Y4=-0.786X+28.09(r2=-0.935) where X is percentage of the dietary CP. The highest ratio of retained protein, to ingested one was 71.9% at 14.9% of the dietary CP level and that of retained energy to ingested one was 52.6% at 14.9% of the dietary CP level.The contents of the digestive tracts increased with increasing the dietary CP level and body size. However, they did not affect the estimation of the requirements.

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Lipolytic Diet to Control Carcass Fat Deposition of Growing Chicks

Abstract: It was revealed in our previous papers1,2) that White Leghorn chicks younger than 4 weeks of age can easily become fatty with carcass fat of 17% in average or easily become lean with carcass fat less than 2%. Both fatty and lean chicks were obtained

Cited by 3 publications

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Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹

A Method for the Control of Protein and Energy Retentions in Growing Rats

Effects of Dietary Protein Level on Carcass Composition of Broilers at 5 to 15 Days of Age.

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Lipolytic Diet to Control Carcass Fat Deposition of Growing Chicks

Abstract: It was revealed in our previous papers1,2) that White Leghorn chicks younger than 4 weeks of age can easily become fatty with carcass fat of 17% in average or easily become lean with carcass fat less than 2%. Both fatty and lean chicks were obtained

Cited by 3 publications

References 0 publications

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets1

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets1

A Method for the Control of Protein and Energy Retentions in Growing Rats

Effects of Dietary Protein Level on Carcass Composition of Broilers at 5 to 15 Days of Age.

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Product

Resources

About

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹

Effect of calorie to protein ratio on the degree of fatness in broilers fed on practical diets¹