Some Effects of Feeding Corticosterone to Chickens

Gross, W. B.; Siegel, P. B.; DuBOSE, R. T.

doi:10.3382/ps.0590516

Cited by 103 publications

(39 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Such information is important because in poultry-producing regions high temperature can often be accompanied by a range of RH, which can markedly affect the degree of heat stress in birds (Balnave 2004). The combination of high ambient temperature and relative humidity induces high corticosteroid concentrations in blood (Siegel 1980;Beuving et al 1989). In addition, the relationship between adrenocorticotropic hormone (ACTH) and leukocyte response has been widely examined.…”

mentioning

confidence: 99%

“…In addition, the relationship between adrenocorticotropic hormone (ACTH) and leukocyte response has been widely examined. It has been reported that the proportions of leukocytes change significantly when ACTH is administered either by injection (Gray et al 1989) or in feed (Gross et al 1980). In hens, changes of leukocytes in response to stress have been found to be less variable and thus a more reliable indicator than plasma corticosterone values (Gross and Siegel 1983;McFarlane and Curtis 1989).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Impact of Vitamins C and E Dietary Supplementation on Leukocyte Profile of Layer Hens Exposed to High Ambient Temperature and Humidity

2010

View full text Add to dashboard Cite

A 30-day experiment involving 720 White Leghorn layer hens was carried out to evaluate the effects of vitamins C and E on leukocyte and heterophil/lymphocytes ratios of the layer hens during the natural summer conditions. The birds were divided into 4 groups, one control with basal diet and three experimental with diet supplemented with vitamin C, vitamin E, or combination of both vitamins. Each group was divided into 4 subgroups. Exposure of layer hens to 31 ± 3 °C and 33 ± 0 °C ambient temperature and 84.6% and 81.5% relative humidity during the experiment caused an increase in the value of temperature humidity index of 15.5 above the threshold value of 70 established for this species. Total white blood cells, lymphocytes, and eosinophil levels were significantly (p < 0.001) higher in all treated groups compared to control. Similarly, heterophil/lymphocyte ratios of 0.51, 0.52, and 0.50 for groups with diet supplemented with vitamin C, vitamin E and vitamins C + E, respectively, were significantly (p < 0.001) lower compared to 0.59 recorded in the control group. However, heterophil, basophil and monocyte values were significantly (p < 0.001) higher in the control group compared to all treated groups. The results of the present study showed that dietary supplementation of vitamins C and E, or their combination, reduces the harmful effect of high ambient temperature and humidity on the leukocyte indicators of exposed layer hens, thereby alleviating the stress imposed on their thermoregulatory mechanism and physiological status. Heat stress, antioxidant vitamins, white blood cells, laying birdsAll over the world, farmers have to solve a problem of heat stress in poultry during the summer period. Global warming as a result of increased industrialization and environmental degradation has led to continuous increase in ambient temperature, thereby making heat stress a major problem of livestock farming, particularly in the poultry sector (Daghir 2009). This is because poultry are particularly sensitive to high ambient temperature (AT), more than to cold. Heat stress interferes with the birds' comfort and suppresses production efficiency. In birds, high ambient temperature leads to increased endogenous heat production, since convective transfer of heat is the major thermoregulatory mechanism of birds and depends on air movement by natural or fan-powered ventilation (Shane 2005). As a response, birds have to make major thermo-regulatory adaptations to prevent death from heat exhaustion. As a result, the genetic potential of layer hens is often compromised (Holik 2009). The responses of poultry to high ambient temperatures have been studied several times, but the effect of relative humidity (RH) on intensifying or modifying these responses has received little attention. Relative humidity is rarely included as an experimental variable or measured for information purposes. Such information is important because in poultry-producing regions high temperature can often be accompanied by a range of RH, which can marked...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Impact of Vitamins C and E Dietary Supplementation on Leukocyte Profile of Layer Hens Exposed to High Ambient Temperature and Humidity

2010

View full text Add to dashboard Cite

show abstract

“…The literature on birds is controversial. In some cases administration of corticosterone seems to increase foraging, yet in others such an effect is unclear (Nagra et al, 1963;Wingfield and Silverin, 1986;Gross et al, 1980;Kafri et al, 1988;Gray et al, 1990). A clear dichotomy was found by Astheimer et al (1992) who studied Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii).…”

mentioning

confidence: 99%

Baseline Corticosterone Peaks in Shorebirds with Maximal Energy Stores for Migration: A General Preparatory Mechanism for Rapid Behavioral and Metabolic Transitions?

Piersma

Reneerkens

Ramenofsky

2000

General and Comparative Endocrinology

125

101

View full text Add to dashboard Cite

“…The reduction in the TLC in control group seemed to be due to heat stress which could deplete the level of the indigenous AA (Gross et al, 1980). However, such a reduction in the TLC was previously documented as an important stress indicator (Wolford and Ringer, 1962 …”

Section: Effect Of Ascorbic Acid Supplementation Methods On Some Prodmentioning

confidence: 87%

“…Moreover, heat stress decreases nutrients utilization and feed efficiency, leading to economic losses in layer poultry (Mashaly et al, 2004;Sahin et al, 2009). Furthermore, heat stress leads to a decrease in a total leucocytes count (Gross et al, 1980) and an increase in the bird's heterophils to lymphocytes ratio (Sigel, 1995; Post et al, It is reported that AA supplementation could improve poultry performance when exposed to heat stress (Mack, 2013;Jadhav et al, 2013 Apparently, the performances of poultry in supplementation of AA as anti-heat stress under hot environmental temperatures through different means or routes need an investigation. Therefore, this study was designed to evaluate some productive and physiological performances of ready to lay pullets supplemented with AA through feed, water, and both feed and water.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ascorbic Acid Supplementation Methods on Some Productive and Physiological Performances of Laying Hens

2018

International Journal of Research Studies in Biosciences

View full text Add to dashboard Cite

Some Effects of Feeding Corticosterone to Chickens

Cited by 103 publications

References 9 publications

Impact of Vitamins C and E Dietary Supplementation on Leukocyte Profile of Layer Hens Exposed to High Ambient Temperature and Humidity

Impact of Vitamins C and E Dietary Supplementation on Leukocyte Profile of Layer Hens Exposed to High Ambient Temperature and Humidity

Baseline Corticosterone Peaks in Shorebirds with Maximal Energy Stores for Migration: A General Preparatory Mechanism for Rapid Behavioral and Metabolic Transitions?

Effect of Ascorbic Acid Supplementation Methods on Some Productive and Physiological Performances of Laying Hens

Contact Info

Product

Resources

About