Effect of Intrahepatic Glucose Infusions on Feeding in Heavy and Light Breed Chicks

Lacy, Mary E.; Krey, H. P. Van; Skewes, P. A.; Denbow, D. Michael

doi:10.3382/ps.0640751

Cited by 24 publications

(12 citation statements)

References 19 publications

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“…Naloxone was equally potent in both stocks; this is unusual because other putative regulators of ingestive behavior such as epinephrine (Denbow etal., 1981;, or serotonin, administered intracerebroventncularly (Denbow et al, 1982;, and glucose or fat, administered intrahepatically (Lacy et al, 1985;1986), affect these stocks differently.…”

Section: Discussionmentioning

confidence: 96%

Ingestive Behavior of Meat and Egg-Type Chickens: Equal Sensitivity to Naloxone

McCormack

Denbow

1987

Poultry Science

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The efficacy of the opioid antagonist naloxone in attenuating ingestive behavior in stocks of chickens genetically selected for either meat (Rock-Cornish, RC) or egg production (Single-Comb White Leghorn, SCWL) was investigated. Because the stocks differ markedly in growth rate, two experiments were conducted to compare RC and SCWL cockerels at similar body weights and at the same age. Birds were injected intramuscularly with either isotonic saline or naloxone HCl at a dose of 5 mg/kg body weight. Food and water were offered ad libitum 15 min postinjection. In RC and SCWL stocks of similar body weight, naloxone significantly attenuated cumulative food and water intake through 210 min following the return of food and water. When administered to RC and SCWL stocks of the same age, naloxone significantly attenuated cumulative food intake for 300 min and cumulative water intake at 60 and 120 min. The relatively long-term depressions in cumulative food and water intake were attributable to significant decreases in incremental consumption within early time periods. There was no significant difference in the efficacy of naloxone in attenuating ingestive behavior when the stocks were compared at either similar body weights or at the same age. The results demonstrate that genetic selection for meat or egg production has not significantly altered opioid mechanisms regulating food and water intake in the domestic fowl.

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Section: Discussionmentioning

confidence: 96%

Ingestive Behavior of Meat and Egg-Type Chickens: Equal Sensitivity to Naloxone

McCormack

Denbow

1987

Poultry Science

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“…Long-term selection for rapid growth to market age alters brain and peripheral mechanisms influencing food intake (Burkhart et al, 1983;Lacy et al, 1985;Denbow, 1989). Meat-type chickens, when fed ad libitum, eat at near gut capacity leading to obesity (McCarthy and Siegel, 1983;Katanbaf et al, 1989c), which contributes to reproductive complications and deterioration of health (McDaniel et al, 1981;Siegel and Dunnington, 1985;Wilson and Harms, 1986).…”

Section: Introductionmentioning

confidence: 98%

Performance of early and late feathering broiler breeder females with different feeding regimens

O’Sullivan

Dunnington

Smith

et al. 1991

British Poultry Science

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1. Growth, reproductive characteristics and immunocompetence were evaluated in a line of broiler breeder females segregating at the sex-linked feathering locus when maintained on three feeding regimens with two forms of food in a factorial design. 2. Long-term obesity but not short-term weight gain had deleterious consequences for reproductive characteristics, response to sheep red blood cell antigen, resistance to Escherichia coli and livability. 3. Reproductive performance of early feathering females was superior to that of late feathering ones. Differences were attributed to an association between the allele for late feathering and an endogenous viral locus ev21, which encodes for avian leucosis virus. 4. Reproductive performance of breeders fed crumbles was superior to that of breeders fed a combination of crumbles and fines.

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“…The selection of broilers for increased growth rate has resulted in an increase in appetite (Siege1 and Wisman, 1966) by modulating both central and peripheral mechanisms of hunger regulation (Lacy et al, 1985;Denbow, 1989). The increased feed intake causes obesity, which must be controlled in broiler parent stock in order to maintain health and reproductive competence.…”

Section: Introductionmentioning

confidence: 99%

Broiler breeders: feed restriction and welfare

Mench

2002

World's Poultry Science Journal

159

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Broiler breeders are truly caught in a welfare dilemma, because the management practices that are necessary to ensure health and reproductive competence may also result in a reduction in other aspects of welfare. In this paper I review the welfare concerns associated with feed restriction of broiler breeders. Broiler breeders show evidence of physiological stress as well as an increased incidence of abnormal behaviours, and are also chronically hungry. Alternative methods of decreasing feed intake, dietary dilution or the use of anorexic agents, are also discussed. Thus far, all of these methods have proven unsatisfactory in terms of body weight control, and in addition they do not necessarily improve welfare. Emphasis needs to continue to be placed on developing alternatives to, and modifications of, current feed restriction programmes in order to improve broiler breeder welfare. In addition, the use of genetic selection to decrease the need for restriction should be further explored.

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Effect of Intrahepatic Glucose Infusions on Feeding in Heavy and Light Breed Chicks

Cited by 24 publications

References 19 publications

Ingestive Behavior of Meat and Egg-Type Chickens: Equal Sensitivity to Naloxone

Ingestive Behavior of Meat and Egg-Type Chickens: Equal Sensitivity to Naloxone

Performance of early and late feathering broiler breeder females with different feeding regimens

Broiler breeders: feed restriction and welfare

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