Automatic gravimetric calorimeter with simultaneous recording of physical activity for poultry

Boshouwers, F. M. G.; Nicaise, Elly

doi:10.1080/00071668508416845

Cited by 27 publications

(16 citation statements)

References 12 publications

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“…Heat production and physical activity at 10 levels of increasing strength were measured individually during 22 h experiments from 11.00 until 09.00 h next day as described previously (Boshouwers and Nicaise, 1985). Ambient temperature in the calorimeter was maintained at 18-0 ±0-3 °C and relative humidity at 55 ±5%.…”

Section: Methodsmentioning

confidence: 99%

“…Physical activity was found to be almost zero in the dark (Cain and Wilson, 1971;1974;Aschoff and von Saint Paul, 1973a, b;Bessei and Bessei, 1974;MacLeod et al, 1982;Boshouwers and Nicaise, 1985). At the start of the photo-156 F. M. G. BOSHOUWERS AND ELLY NICAISE period the number of movements increased dramatically.…”

Section: Introductionmentioning

confidence: 93%

“…Normal spontaneous movements were found to increase resting heat production by 20 to 30% (Balnave, 1974;Wenk and van Es, 1979;MacLeod et al, 1982;MacLeod and Jewitt, 1985;Boshouwers and Nicaise, 1985). This increase was partly due to the energy cost of the movements per se, but impairment of thermal insulation may have added to this effect, as increased activity disturbs the boundary air layer.…”

Section: Introductionmentioning

confidence: 93%

“…The energy expenditure of the fowl is affected by physical activity (Squibb, 1975;van Kampen, 1976;Lundy, 1978;Brackenbury and Avery, 1980;MacLeod et al, 1982;Boshouwers and Nicaise, 1985). Normal spontaneous movements were found to increase resting heat production by 20 to 30% (Balnave, 1974;Wenk and van Es, 1979;MacLeod et al, 1982;MacLeod and Jewitt, 1985;Boshouwers and Nicaise, 1985).…”

Section: Introductionmentioning

confidence: 94%

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Physical activity and energy expenditure of laying hens as affected by light intensity

Boshouwers

Nicaise

1987

British Poultry Science

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The influence of light intensity using incandescent bulbs in a 16L:8D day:night schedule on the number and strength of movements and on total, resting and activity-related energy expenditure was investigated. Movements were classified into 10 activity levels of progressively increasing vigour. The number of movements at all activity levels was significantly positively correlated with the logarithm of the light intensity. Movements of low activity strength were less affected by increasing light intensities than vigorous movements. Activity-related energy expenditure was highly significant and positively affected by light intensity. A decrease of the light intensity from 120 to 1 lux may reduce total energy expenditure by 18%. A decrease in energy expenditure by 9% may be achieved by reducing the light intensity to about 15 lux, measured perpendicular to the main axis of radiation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 94%

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Physical activity and energy expenditure of laying hens as affected by light intensity

Boshouwers

Nicaise

1987

British Poultry Science

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“…Fatores como idade da ave e peso excessivo com acúmulo de tecido gorduroso também podem acarretar menor locomoção e maior capacidade da ave em reter o calor corporal, modificando as exigências de energia para mantença. Alguns pesquisadores têm demonstrado que os efeitos do exercício físico levam a diferenças em gastos energéticos (Morse & Smith, 1972;Van Kampen, 1976;Boshouwers & Nicaise, 1983;Mcleod et al, 1982;Boshouwers & Nicaise, 1985;Li et al, 1991).…”

Section: Modelo Unesp (2000) (Unesp Model 2000)unclassified

Programas de alimentação para matrizes pesadas após o pico de postura, com base em modelos para predizer a exigência energética

et al. 2004

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Carlos Boa-Viagem Rabello 3,5 RESUMO -Este trabalho foi conduzido com o objetivo de avaliar o desempenho de matrizes pesadas, submetidas a diferentes programas de alimentação estabelecidos pela aplicação de modelos para predizer as exigências energéticas, após o pico de postura. O experimento foi conduzido no setor de avicultura da UNESP -Campus Jaboticabal, com duração de 84 dias (três períodos de 28 dias). Foram utilizadas 740 matrizes de corte Hubbard Hy-Yield e 80 machos Petterson, com 55 semanas de idade. O delineamento foi inteiramente casualizado, com quatro tratamentos e cinco repetições de 37 aves por repetição (box) e um modelo fatorial 4×3 (quatro tratamentos × três períodos). Os programas de alimentação avaliados foram: T1 -Fornecimento de ração de acordo com o padrão da linhagem (428 kcal/ave/dia de 55 a 66 semanas de idade); T2 -Redução semanal de energia (2 kcal de EM/ave em cada semana); T3 -Fornecimento de ração de acordo com o modelo de exigência de EM, UNESP (2000); e T4 -Fornecimento de ração de acordo com o modelo, NRC (1994). O programa de alimentação com redução semanal de energia foi adequado para manter os desempenhos produtivo e reprodutivo das aves, indicando a possibilidade de redução de 2 kcal/ave/dia, em cada semana, na alimentação de matrizes pesadas após 55 semanas de idade. Os modelos UNESP e NRC proporcionaram estimativas mais elevadas das exigências energéticas que o modelo padrão, provavelmente em decorrência do ganho de peso das matrizes, que esteve acima do recomendado para a linhagem, promovendo maiores exigências de energia para mantença.Palavras-chave: alimentação de matrizes pesadas, desempenhos produtivo e reprodutivo, exigências de energia metabolizável Feeding Programs for Broiler Breeder Hens after Peak Production Based on Models to Predict Energy RequirementsABSTRACT -This research was carried out to evaluate the performance of broiler breeder hens submitted to different feeding programs applying models to predict the metabolizable energy requirements after peak production. The experiment was conducted during 84 days (three periods of 28 days), at the Sao Paulo State University -Jaboticabal. Seven hundred and forty female broiler breeders Hubbard Hy-Yield, and eighty males Petterson 55-week old were assigned to a randomized design with four treatments and five replicates of 37 birds (box), and a factorial model 4×3 (four treatments and three periods). The feeding programs evaluated were: T1 -feeding according to the lineage recommendation (428 kcal/bird/day from 55 to 66-weeks old); T2 -energy reduction (2 kcal/bird/day for each week); T3 -feeding according to UNESP (2000) model; T4 -feeding according to NRC (1994) Model. The feeding program with weekly energy reduction was suitable to maintain the productive and reproductive performance of the birds, indicating the possibility of reducing 2 kcal/bird/day, at each week, in broiler breeders fed after 55 weeks of age. The UNESP and NRC models promoted higher energy intakes than the lineage recommendation, probably du...

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Climatic Environment and Energy Metabolism in Broilers

Scheele¹,

Hel²,

Verstegen³

et al. 1987

Energy Metabolism in Farm Animals

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Automatic gravimetric calorimeter with simultaneous recording of physical activity for poultry

Cited by 27 publications

References 12 publications

Physical activity and energy expenditure of laying hens as affected by light intensity

Physical activity and energy expenditure of laying hens as affected by light intensity

Programas de alimentação para matrizes pesadas após o pico de postura, com base em modelos para predizer a exigência energética

Climatic Environment and Energy Metabolism in Broilers

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