Dietary Energy and Fat Content as Factors in the Nutrition of Developing Egg Strain Pullets and Young Hens

Cunningham, David; Morrison, W. D.

doi:10.3382/ps.0550085

Cited by 13 publications

(20 citation statements)

References 25 publications

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“…In variance with the finding of Pfaff and Austic (1974) that fat pad growth could be reduced by the feeding of either low energy or high protein rearing diets, Cunningham and Morrison (1976) reported that energy level of the diet had no effect at sexual maturity on body, liver or abdominal fat pad weights, liver water, fat, protein or ash or total body water, fat or ash when S.C.W.L. pullets were fed on two dietary programmes (pullet vs. broiler diets) which differed in energy content by approximately 457 kcal.…”

Section: Introductionmentioning

confidence: 63%

“…Analysis of the data collected in this experiment was accomplished through the use of a multivariance program (Cunningham and Morrison, 1976). The values used in the responses of feed intake (g./bird/day) and caloric intake (kcal.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical composition of each liver and carcass was determined as previously described (Cunningham and Morrison, 1976) except prior to chemical analysis, carcass samples were reground twice through a 2 horse power Hobart meat grinder using a 0.32 cm. (1/8") die.…”

Section: Introductionmentioning

confidence: 99%

“…Data were collected on a number of parameters relating to body growth and development as previously described (Cunningham and Morrison, 1976).…”

Section: Introductionmentioning

confidence: 99%

“…All other parameters were on an individual bird basis. Wet liver weight and abdominal fat pad weight were analysed as described previously (Cunningham and Morrison, 1976).…”

Section: Introductionmentioning

confidence: 99%

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Dietary Energy and Fat Content as Factors in the Nutrition of Developing Egg Strain Pullets and Young Hens

Cunningham

Morrison

1977

Poultry Science

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Nine starting and rearing diets (three energy levels each with three fat levels) were fed to commercial White Leghorn chicks from hatch to 20 weeks of age. As noted in the earlier papers of this series, pullets fed the high energy rearing diets showed significant (P = 0.05) reductions in feed intake, however, average daily caloric intake was greater (P = 0.05) for pullets consuming the low energy rearing diets. Fat content of the diet had not influence on either daily feed (g.) or caloric (kcal.) intake. Energy content of the diets failed (P = 0.05) to affect parameters related to body growth and development, hepatic citrate-cleavage and "malic" enzyme activity and liver or body composition. Fat content of the diet depressed hepatic enzyme activity while no effect was noted on body weight, liver weight or body composition. The onset of sexual maturity altered lipid metabolism in the developing pullets. Significant (P = 0.05) energy level by fat level interactions were noted in only two of the 20 parameters studied in this experiment. In vitro assay of hepatic citrate-cleavage and "malic" enzyme activity proved to be of little value in predicting hepatic lipogenic activity and subsequent effects on liver and total body composition.

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Section: Introductionmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Data were collected on a number of parameters relating to body growth and development as previously described (Cunningham and Morrison, 1976).…”

Section: Introductionmentioning

confidence: 99%

“…All other parameters were on an individual bird basis. Wet liver weight and abdominal fat pad weight were analysed as described previously (Cunningham and Morrison, 1976).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations