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פותח על ידי קלירמאש פתרונות בע"מ -
Vitamin D metabolism and calbindin (calcium-binding protein) in aged laying hens
Year:
1987
Source of publication :
Journal of Nutrition
Authors :
בר, אריה
;
.
הורביץ, שמואל
;
.
Volume :
117
Co-Authors:
Bar, A., Institute of Animal Science, Agricultural Reseach Organization, The Volcani Center, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Reseach Organization, The Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
1775
To page:
1779
(
Total pages:
5
)
Abstract:
Calbindin (calcium-binding protein) concentration, vitamin D metabolism and shell quality were investigated in young (7- to 9-mo-old) and aged (19- to 21-mo-old) laying hens consuming normal or low level of calcium (Ca). Although egg weight and percent of cracked eggs were higher and egg production and shell density (mg/cm2) were lower (significantly, P<0.01) in aged hens, shell weight, plasma Ca and duodenal and egg shell gland calbindin were similar to those of young hens. Dietary Ca restriction reduced shell weight, shell density and structural bone and plasma Ca in both the young and aged birds. The production of 1,25-dihydroxycholecalciferol [1,25(OH)2D3] and its concentration in the plasma were higher in hens fed low dietary levels of Ca than in hens fed normal Ca levels only in the young hens. However, a slightly higher production of 1,25(OH)2D3 and concentration of duodenal calbindin were also observed in severely Ca-restricted (1.4% Ca for 19 d) aged hens than in the younger hens. The results suggest that the aged hen loses its ability to adapt to changes in Ca intake or needs through mechanisms involving modulation of vitamin D metabolism.
Note:
Related Files :
aging
Animal
animal experiment
Egg Shell
Female
metabolism
ovulation
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24027
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:04
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Scientific Publication
Vitamin D metabolism and calbindin (calcium-binding protein) in aged laying hens
117
Bar, A., Institute of Animal Science, Agricultural Reseach Organization, The Volcani Center, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Reseach Organization, The Volcani Center, Bet Dagan 50250, Israel
Vitamin D metabolism and calbindin (calcium-binding protein) in aged laying hens
Calbindin (calcium-binding protein) concentration, vitamin D metabolism and shell quality were investigated in young (7- to 9-mo-old) and aged (19- to 21-mo-old) laying hens consuming normal or low level of calcium (Ca). Although egg weight and percent of cracked eggs were higher and egg production and shell density (mg/cm2) were lower (significantly, P<0.01) in aged hens, shell weight, plasma Ca and duodenal and egg shell gland calbindin were similar to those of young hens. Dietary Ca restriction reduced shell weight, shell density and structural bone and plasma Ca in both the young and aged birds. The production of 1,25-dihydroxycholecalciferol [1,25(OH)2D3] and its concentration in the plasma were higher in hens fed low dietary levels of Ca than in hens fed normal Ca levels only in the young hens. However, a slightly higher production of 1,25(OH)2D3 and concentration of duodenal calbindin were also observed in severely Ca-restricted (1.4% Ca for 19 d) aged hens than in the younger hens. The results suggest that the aged hen loses its ability to adapt to changes in Ca intake or needs through mechanisms involving modulation of vitamin D metabolism.
Scientific Publication
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