1978
DOI: 10.3168/jds.s0022-0302(78)83595-4
|View full text |Cite
|
Sign up to set email alerts
|

Relation of Hormonal Variations to Nutritional Studies and Metabolism of Ruminants

Abstract: Variations in concentrations of growth hormone, insulin, glucagon, prolactin, adrenal corticoids, and thyroid hormones in blood plasma of ruminants as related to circadian rhythms, environmental factors and nutrition are reviewed. Rhythms in prolactin concentrations are related to light and temperature. Concentrations of prolactin in plasma are higher in warm environments and during longer photoperiods. There is episodic secretion of growth hormone in cattle with frequent peaks in plasma concentrations during … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

17
61
0
5

Year Published

1978
1978
2008
2008

Publication Types

Select...
4
2
1

Relationship

0
7

Authors

Journals

citations
Cited by 126 publications
(83 citation statements)
references
References 72 publications
17
61
0
5
Order By: Relevance
“…Cataldi et al (1994) observed, on the contrary, that blood levels of this hormone rose significantly after an acute, short-lived period of stress, determined by isolation and manual immobilization. Similar results were also observed in bovines, after undergoing a brief period of heat stress, while long-term heat stress of the same animals led to a drop in somatotropin (Trenkle, 1978). Long-term heat stress did not produce variations in blood GH in sheep (Colthorpe et al, 1998).…”
Section: Discussionsupporting
confidence: 81%
“…Cataldi et al (1994) observed, on the contrary, that blood levels of this hormone rose significantly after an acute, short-lived period of stress, determined by isolation and manual immobilization. Similar results were also observed in bovines, after undergoing a brief period of heat stress, while long-term heat stress of the same animals led to a drop in somatotropin (Trenkle, 1978). Long-term heat stress did not produce variations in blood GH in sheep (Colthorpe et al, 1998).…”
Section: Discussionsupporting
confidence: 81%
“…Insulin release is also not necessarily related to a rise in blood glucose level, indeed, the latter may actually fall when insulin levels are rising (Bassett, 1975;Bines, unpublished results). It is known that when diets containing a high proportion of starchy concentrates are given to ruminants, the level of insulin in blood is raised (Trenkle, 1970). However, reducing the amount of concentrate in the ration would be unlikely to increase the total energy supply to the mammary gland since the increased mobilization of energy from body tissues is likely to be offset by a reduction in the intake of dietary energy .…”
Section: Vol 37mentioning
confidence: 99%
“…The level falls in the starved animal (Trenkle, 1978) and is low before feeding (Bines & Hart, unpublished results), rising markedly after a meal, *the change in concentration sometimes being as large as six-fold (Bines & Hart, unpublished results).…”
Section: Vol 37mentioning
confidence: 99%
See 2 more Smart Citations