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Effect of calcium soaps of fatty acids and administration of somatotropin on milk production, preovulatory follicular development, and plasma and follicular fluid lipid composition in high yielding dairy cows
Year:
1999
Source of publication :
Journal of Dairy Science
Authors :
Folman, Yeshayahu
;
.
Moallem, Uzi
;
.
Volume :
82
Co-Authors:
Moallem, U., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel, Hebrew Univ. Faculty of Agriculture, Rehovot 76100, Israel
Folman, Y., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Bor, A., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Arav, A., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Sklan, D., Hebrew Univ. Faculty of Agriculture, Rehovot 76100, Israel, Faculty of Agriculture, PO Box 12, Rehovot, 76-100, Israel
Facilitators :
From page:
2358
To page:
2368
(
Total pages:
11
)
Abstract:
The effect of fat and bovine somatotropin (bST) on preovulatory follicular hormones and lipids was evaluated by feeding cows for 150 d from parturition a control diet, a control diet plus 0.55 kg/d of calcium soaps of fatty acids, or a control diet with 500 mg of bST injected every 14 d. Fourteen days after a synchronized or natural estrus, cows were injected with a PGF2α analogue; 48 h later, follicular fluid from all ovarian follicles >8 mm was aspirated. Cows fed fat or injected with bST produced more milk and milk solids than did control cows, and cows on the bST treatment lost more body condition after calving than did cows on the other treatments. Both treatments changed the proportion of estradiol-active follicles (>400 ng of estradiol/ml of follicular fluid) and the correlation between follicular fluid estradiol concentration and the total number large follicles per cow. In follicles aspirated between 60 and 90 DIM the percentage of estradiol-active follicles was 67, 40, and 0 for cows on the control, calcium soaps of fatty acids, and bST treatments, respectively. After 90 DIM, no differences existed between treatments in the percentage of estradiol-active follicles. Estradiol concentration in follicular fluid was correlated with DIM at follicle aspiration (r = 0.51). The proportion of oleic acid in free fatty acids in plasma at 50 DIM was lower in control cows and was lower in follicular fluid of estradiol-active follicles. Both calcium soaps of fatty acids and bST had a considerable effect on follicular development and activity and the composition of fatty acids in follicles.
Note:
Related Files :
Animal
Animals
Blood
cattle
fatty acids
Female
Follicular Fluid
lactation
Lipids
metabolism
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21181
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
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Scientific Publication
Effect of calcium soaps of fatty acids and administration of somatotropin on milk production, preovulatory follicular development, and plasma and follicular fluid lipid composition in high yielding dairy cows
82
Moallem, U., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel, Hebrew Univ. Faculty of Agriculture, Rehovot 76100, Israel
Folman, Y., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Bor, A., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Arav, A., Institute of Animal Science, Agriculture Research Organization, Volcani Center, Bet Dagan 50250, Israel
Sklan, D., Hebrew Univ. Faculty of Agriculture, Rehovot 76100, Israel, Faculty of Agriculture, PO Box 12, Rehovot, 76-100, Israel
Effect of calcium soaps of fatty acids and administration of somatotropin on milk production, preovulatory follicular development, and plasma and follicular fluid lipid composition in high yielding dairy cows
The effect of fat and bovine somatotropin (bST) on preovulatory follicular hormones and lipids was evaluated by feeding cows for 150 d from parturition a control diet, a control diet plus 0.55 kg/d of calcium soaps of fatty acids, or a control diet with 500 mg of bST injected every 14 d. Fourteen days after a synchronized or natural estrus, cows were injected with a PGF2α analogue; 48 h later, follicular fluid from all ovarian follicles >8 mm was aspirated. Cows fed fat or injected with bST produced more milk and milk solids than did control cows, and cows on the bST treatment lost more body condition after calving than did cows on the other treatments. Both treatments changed the proportion of estradiol-active follicles (>400 ng of estradiol/ml of follicular fluid) and the correlation between follicular fluid estradiol concentration and the total number large follicles per cow. In follicles aspirated between 60 and 90 DIM the percentage of estradiol-active follicles was 67, 40, and 0 for cows on the control, calcium soaps of fatty acids, and bST treatments, respectively. After 90 DIM, no differences existed between treatments in the percentage of estradiol-active follicles. Estradiol concentration in follicular fluid was correlated with DIM at follicle aspiration (r = 0.51). The proportion of oleic acid in free fatty acids in plasma at 50 DIM was lower in control cows and was lower in follicular fluid of estradiol-active follicles. Both calcium soaps of fatty acids and bST had a considerable effect on follicular development and activity and the composition of fatty acids in follicles.
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