Effects of exogenous melatonin on growth and energy metabolism of chickens

Osei, Peter; Robbins, Kelly R.; Shirley, H. V.

doi:10.1016/s0271-5317(89)80105-8

Cited by 21 publications

(8 citation statements)

References 23 publications

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“…The decrease of heat production after melatonin treatment in chickens may explain improved feed conversion of chicken fed diet supplemented with this hormone as observed by Osei et al (1989) and Clark and Classen (1995). The decline in heat production could be attributed to the hypothermic effect of melatonin (George 1982;.…”

Section: Resultsmentioning

confidence: 99%

“…It is clear that melatonin was administered at a pharmacological dose and therefore care must be taken in extrapolating experimental results to physiological conditions. However, the dose used was in the range used in published studies (Osei et al 1989;Clark and Classen 1995) in which plasma melatonin concentrations were not measured and the absorption of this hormone into organism was not ascertained. Our data clearly showed that melatonin is well absorbed and remains stabile in broiler chicken when administrated in feed.…”

Section: Resultsmentioning

confidence: 99%

“…Some studies (Osei et al 1989) have shown that melatonin improves feed conversion but possible mechanisms of action are not understood. There are several levels at which melatonin may modulate efficiency of nutrient utilisation.…”

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confidence: 99%

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Melatonin Decreases Heat Production in Female Broiler Chickens

Zeman¹,

Buyse²,

Herichová³

et al. 2001

Acta Vet. Brno

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The principal hormone of the pineal gland, melatonin, is involved in the control of circadian rhythms in birds. Moreover, several studies link melatonin with modulation of metabolism and growth in chickens. Therefore, the present study examines effects of pharmacological doses of melatonin on feed conversion and heat production in female broiler chickens. The supplementation of melatonin at a dose of 150mg/kg of food increased plasma hormone levels to 28.76 ± 0.47 ng/ml and 19.29 ± 0.62 ng/ml in 14-and 21-day-old chickens, respectively. The treatment resulted in a highly significant decline in heat production of 2-week and 3-week-old chickens (8.38 and 13.05%, respectively). Feed conversion was improved only in younger chickens. The present data are consistent with hypothesis that melatonin reduces heat production by lowering body temperature and regulating heat dissipation. Poultry, feed conversion, energy metabolism, temperature

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Melatonin Decreases Heat Production in Female Broiler Chickens

Zeman¹,

Buyse²,

Herichová³

et al. 2001

Acta Vet. Brno

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“…Dietary MEL has been shown to increase growth and improve feed efficiency of Leghorn (Phetteplace and Nockels, 1985) and broiler chicks (Osei et al, 1989). Phetteplace and Nockels (1985) observed linear improvements with 5,10,15, and 20 ppm of supplemented MEL.…”

Section: Introductionmentioning

confidence: 99%

“…Phetteplace and Nockels (1985) observed linear improvements with 5,10,15, and 20 ppm of supplemented MEL. Osei et al (1989) compared 15 ppm with unsupplemented controls and also reported an increase in feed consumption.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Continuously or Diurnally Fed Melatonin on Broiler Performance and Health

Clark

Classen

1995

Poultry Science

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An experiment was designed to investigate the effects of dietary melatonin (MEL) on the performance and health of broiler chicks. Chicks raised under constant lighting were fed practical broiler diets in mash form containing 0, 20, or 40 ppm MEL from 0 to 3 wk. A fourth treatment (0 ppm MEL: 6h/d; 20 ppm MEL: 18 h/d) was used to mimic a diurnal light:dark cycle. Commercial broiler grower diets without MEL supplementation were fed from 3 to 6 wk of age. A small dose-related decrease was observed in weight gain (0 to 14 d) and feed consumption (0 to 21 d) due to continuous feeding of MEL. Continuously fed MEL also improved feed efficiency in the first 3 wk vs the control (0 ppm). Growth and feed consumption from 0 to 21 d were not affected by the diurnally fed diet when compared with the control treatment. No effects were found for mortality. However, the incidence of sudden death syndrome (SDS) was numerically less for the diurnal (3.56%) and 40 ppm (3.76%) diets from 0 to 42 d than for the control treatment 5.56%. Skeletal disease was generally unaffected, with the exception of the incidence of crooked toes at 42 d (0 ppm MEL: 8.67% vs diurnal: 4.89%). Dietary MEL fed either continuously or in a diurnal pattern had a minor effect on the performance and health of broiler chickens.

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Effects of continuous light and melatonin treatment on energy metabolism of the rat

Mustonen

Nieminen

Hyvärinen

2002

J Endocrinol Invest

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Melatonin affects food intake, body mass and adiposity of several mammals, but the effects of melatonin on energy metabolism remain largely unknown. This study investigated subacute effects of persistent melatonin treatment and continuous light on carbohydrate and fat metabolism of rat liver and kidney. The male and female rats (no.=40) were maintained either in 12L:12D photoperiod or in constant light. Half the rats in both lighting conditions were treated with continuous-release melatonin implants. Liver lipid concentrations, liver and kidney glucose-6-phosphatase, glycogen phosphorylase and lipase esterase activities, glycogen contents as well as plasma T4, T3, insulin, glucose and melatonin concentrations were determined. There was clear sexual dimorphism in the responses to exogenous melatonin and constant light. Continuous light stimulated carbohydrate metabolism of rat liver. Exogenous melatonin enhanced utilization of liver carbohydrates but suppressed hepatic lipolysis. Changes in normal circulating melatonin concentrations led to enhanced utilization of kidney carbohydrates supporting a role for melatonin in renal function. Both exogenous melatonin and constant light seem to have a strong regulatory effect on rat energy metabolism.

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Effects of exogenous melatonin on growth and energy metabolism of chickens

Cited by 21 publications

References 23 publications

Melatonin Decreases Heat Production in Female Broiler Chickens

Melatonin Decreases Heat Production in Female Broiler Chickens

The Effects of Continuously or Diurnally Fed Melatonin on Broiler Performance and Health

Effects of continuous light and melatonin treatment on energy metabolism of the rat

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