scholarly journals The Effect of Dietary Protein Levels in Isocaloric Diets on the Composition of Avian Pancreatic Juice

1978 ◽  
Vol 57 (6) ◽  
pp. 1622-1628 ◽  
Author(s):  
FRANCIS H. BIRD ◽  
GUILFORD E. MOREAU
Keyword(s):  
Pancreatic Juice ◽  
Dietary Protein ◽  
Protein Levels ◽  
Isocaloric Diets

The effects of dietary protein content on growth and maturation in deer mice

1999 ◽  
Vol 77 (11) ◽  
pp. 1822-1828 ◽  
Author(s):  
Andrew G McAdam ◽  
John S Millar
Keyword(s):  
Protein Content ◽  
Dietary Protein ◽  
Maternal Diet ◽  
Natural Populations ◽  
Female Offspring ◽  
Deer Mice ◽  
Nestling Growth ◽  
Protein Levels ◽  
In Captivity ◽  
Isocaloric Diets

Growth and female maturation appear to be limited by the availability of dietary protein in natural populations of deer mice (Peromyscus maniculatus borealis) in the Kananaskis Valley, Alberta. We examined the effects of dietary protein content on nestling growth rates and sexual maturation of female deer mice in two laboratory experiments. In the first, mice whose mothers were fed a low-protein mixture of sunflower seeds and oats (14% protein) exhibited slow growth prior to weaning and those fed high-protein cat food (30% protein) postweaning showed compensatory growth. Preweaning but not postweaning diet quality affected the proportion of females who were sexually mature at 42 days of age. Therefore, while deficient nestling growth can be compensated for, the effects of a low-quality maternal diet during lactation may have lasting effects on the maturation of female offspring. In the second experiment, mice raised on isocaloric diets of 14, 20, and 30% protein did not differ in growth as nestlings or juveniles. Differences among the three diets in the proportion of mature females at 42 days did not correspond to dietary protein levels as predicted. Dietary protein content from 14 to 30% appear to be sufficient for juvenile mice raised in captivity.

Performance of brown layers fed reduced dietary protein levels in two rearing systems

2020 ◽  
Vol 49 ◽  
Author(s):  
Eduardo de Faria Viana ◽  
Wesley José de Souza ◽  
Miliane Alves da Costa ◽  
Emmanuel Arnhold ◽  
Fabyola Barros de Carvalho ◽  
...  
Keyword(s):  
Dietary Protein ◽  
Protein Levels

Effects of breeds and dietary protein levels on the growth performance, energy expenditure and expression of avUCP mRNA in chickens

2013 ◽  
Vol 40 (4) ◽  
pp. 2769-2779 ◽  
Author(s):  
Qihua Li ◽  
Zhiqiang Xu ◽  
L. Liu ◽  
Hongxin Yu ◽  
Hua Rong ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Growth Performance ◽  
Dietary Protein ◽  
Protein Levels
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