The Influence of Restricted Feed Intake on the Response of Chickens to Marek’s Disease

Han, Peter F.-S.; Smyth, J. Robert

doi:10.3382/ps.0510986

Cited by 19 publications

(6 citation statements)

References 7 publications

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“…Correlations between response to SRBC antigen and weights of bursa of Fabricius and thymus have been equivocal (Yamamoto and Glick, 1982;Ubosi et al, 1985;Martin et al, 1988). Viability and productivity of chickens improved when feed intake was restricted (Han and Smyth, 1972;Katanbaf et al, 1987Katanbaf et al, , 1989a. These results are consistent with the observation that feed restriction of autoimmunity-prone mice enhances the immunological vigor of the mice (Ogura et al, 1989) and contributes to a marked inhibition of immunological involution associated with aging.…”

Section: Introductionsupporting

confidence: 88%

“…In the present experiment percentage carcass fat in the AL chickens was essentially double that of those fed on alternate days. Under AL feeding, individuals became obese more rapidly and their health subsequently declined (Han and Smyth, 1972;Pym and Dillon, 1974;Katanbaf et al, 1987;van Niekerk et al, 1988;Katanbaf et al, 1989a). Bursal and thymic involution among AL chickens was evident by 50 days of age, and they also had lower SRBC antibody titers, at a younger age (37 days of age), during the time of T-cell-dependent immune response maturation (McCorkle and Glick, 1980).…”

Section: Discussionmentioning

confidence: 93%

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Growth and Carcass Characteristics of Early- and Late-Feathering Broilers Reared Under Different Feeding Regimens

1991

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Growth, immunological characteristics, and carcass traits were measured in early-and latefeathering chickens maintained under three feeding regimens. The regimens were 1) AL, ad libitum, 2) RL, alternate day feed restriction from 6 to 27 days of age and then released to ad libitum, 3) SOD, alternate day feeding restriction from 6 days of age to the end of the experiment Sexual dimorphism was observed for accelerated growth with convergence in BW of RL with AL chickens occurring at a younger age in males than females. Absolute BW, feather weight, and gastrointestinal tract (GIT) weights were lower for SOD, after 45 days of age, than for AL and RL chickens. Relative to BW, however, GIT and liver weights, at 45 days of age but not 64 days of age, were heavier for SOD than for AL and RL chickens. Percentage of carcass lipid was lower for SOD than for AL and RL chickens. Generally, carcass traits and components of the GIT were similar for Regimens AL and RL at 45 and 64 days of age. Exceptions were lower percentages for carcass lipid and liver lipid for RL than AL chickens at 64 days of age. There was a significant feeding regimen by age interaction for heterophil to lymphocyte ratios caused by a greater increase in ratios with age for AL than for RL and SOD chickens. At 37 days of age, AL chickens had lower antibody titers to SRBC than SOD or RL chickens that did not differ. The AL chickens had reduced bursa of Fabricius and thymus weights relative to BW, indicative of immunological involution, along with reduced livability, compared with RL and SOD chickens, which did not differ in livability. Early-and late-feathering chickens were similar for most of the traits measured. One exception was higher antibody titers to SRBC in early-than late-feathering chickens. (

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Section: Introductionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 93%

Growth and Carcass Characteristics of Early- and Late-Feathering Broilers Reared Under Different Feeding Regimens

1991

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“…Proudfoot and Aitkem (1969) observed a reduction in BW and lower losses from a naturally occurring outbreak of Marek's disease when Leghorn chickens were fed a 10% protein diet than when fed a 16% protein diet from 56 to 147 days of age. Likewise, Han and Smyth (1972b) found that restriction of total feed intake accompanied by retardation of body growth significantly delayed the time of development as well as reduced the overall incidence of Marek's disease in 8-wk-old chickens following inoculation with JM virus at 1 day of age.…”

Section: Discussionmentioning

confidence: 96%

Influence of Selection for Increased Body Weight on the Incidence of Leiomyomas and Leiomyosarcomas in Japanese Quail

Foster¹,

Nestor²,

Ym³

et al. 1989

Poultry Science

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Leiomyomas and leiomyosarcomas were observed in adult laying hens from lines of Japanese quail selected solely (HW) or partly (HW-HP; HW-LP) for increased 4-wk BW and the corresponding randombred control (R1). No neoplasms were observed in a line (LW) selected for decreased 4-wk BW based on observations in one generation. Line R1 served as the base population for Lines HW and LW and was maintained without conscious selection for any trait, Lines HW-HP and HW-LP were sublines of Line HW in which the males were selected for increased 4-wk BW and the females were selected for high or low levels of plasma total phosphorus, respectively. Hens of all lines were necropsied after completing a 120-day production period. A high incidence of neoplasms were found in the dorsal and ventral ligaments of the oviduct in the immediate vicinity of the magnum, and the incidence was much greater in the lines selected for increased growth than in Line R1. These results suggest that selection for increased BW in Lines HW, HW-HP, and HW-LP has resulted in genetic changes that are conducive to neoplastic growth. Based on the results of one generation, it appears that selection for decreased 4-wk BW reduced incidence of neoplasms.

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“…Feed restriction is a management technique widely used in the poultry industry to control body weight (BW), flock uniformity and performance ( Lu et al., 2021 ; Scott et al., 1999 ), improve egg quality ( Tolkamp et al., 2005 ), feed efficiency and profitability of bird flocks ( Ewa et al., 2008 ; Olawumi, 2014 ) and manage disease ( Han and Smyth, 1972 ). Quantitative measures such as reduced feed allowance offered multiple times a day ( Taherkhani et al., 2010 ), skip-a-day feeding ( Wilson et al., 2018 ), and time-restricted feeding ( Saibaba et al., 2021 ), as well as qualitative methods where birds have access to different nutrient (protein, energy, or amino acids) allocations in diets ( Ghazanfari et al., 2010 ) or feed dilution with low nutrient value ingredients ( Rezaei and Hajati, 2009 ; Röhe et al., 2018 ), are established ways of restricting feed consumption in the poultry industry.…”

Section: Introductionmentioning

confidence: 99%

Effect of restricted feeding on hen performance, egg quality and organ characteristics of individual laying hens

et al. 2023

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The Influence of Restricted Feed Intake on the Response of Chickens to Marek’s Disease

Cited by 19 publications

References 7 publications

Growth and Carcass Characteristics of Early- and Late-Feathering Broilers Reared Under Different Feeding Regimens

Growth and Carcass Characteristics of Early- and Late-Feathering Broilers Reared Under Different Feeding Regimens

Influence of Selection for Increased Body Weight on the Incidence of Leiomyomas and Leiomyosarcomas in Japanese Quail

Effect of restricted feeding on hen performance, egg quality and organ characteristics of individual laying hens

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