The Effect of Constant Ambient Temperature and Ration on the Performance of Sexed Broilers

Cerniglia, George J.; Hebert, J. A.; Watts, A. B.

doi:10.3382/ps.0620746

Cited by 27 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Resultados semelhantes foram observados por CERNIGLIA et al (1983), FARREL e SWAIN (1987) e PERRALT e LEESON (1992), que verificaram ganhos de pesos significativamente reduzidos, quando compararam grupos de aves com alimentação à vontade e restrita, em altas temperaturas.…”

Section: Methodsunclassified

Efeito da temperatura ambiente e da restrição alimentar sobre o desempenho e a composição da carcaça de frangos de corte

et al. 2000

View full text Add to dashboard Cite

RESUMO -O objetivo deste experimento foi estudar os efeitos da temperatura ambiente e da restrição alimentar sobre o desempenho produtivo, o rendimento das carcaças e dos cortes nobres e os teores de gordura, água e proteína das carcaças e os teores de glicogênio do fígado de frangos de corte em diferentes condições ambientais. O delineamento experimental usado foi em blocos casualizados, em esquema fatorial 5 x 2 (programa alimentar e sexo) com duas repetições dentro de cada ambiente e 14 aves por unidade experimental. Aos 42 dias de idade, o consumo de ração e o ganho de peso foram influenciados negativamente pela temperatura e pelo sexo, porém não foram afetados pelo programa de restrição alimentar. Os rendimentos de carcaça e de cortes nobres não foram influenciados pela temperatura, pelos programas de restrição alimentar e pelo sexo. Os programas de restrição alimentar e a temperatura não influenciaram os teores de gordura, água e proteína da carcaça. As fêmeas apresentaram maior teor de gordura nas carcaças. Já os teores de glicogênio do fígado foram negativamente influenciados pelos programas de restrição alimentares e pelo sexo, porém não foram afetados pela temperatura.Palavras-chave: frangos de corte, gordura abdominal, gordura total, programa alimentar, rendimentos de carcaça e cortes nobres, sexo, temperatura Effects of Environment Temperature and Feeding Restrictions Programs on Performance and Fat Carcass Composition of BroilersABSTRACT -The objective of this experiment was to study the effects of environmental temperature and feeding restriction programs on performance, carcass and noble cuttings yields and fat, water and protein contents of the carcass, and also the liver glycogen content of broiler chickens under different environmental conditions. A completely randomized block experimental design, in a 5 x 2 (feeding program versus sex) factorial arrangement with two replicates within each environmental and 14 birds per experimental plot, was used. At 42 days of age, the temperature and sex negatively affected the intake and weight gain, but the feeding restriction program did not affect them. Temperature, feeding restriction programs and sex did not affect the carcass and noble cutting yields. The feeding restriction programs and the temperature did not affect the carcass fat, water and protein contents. As for sex, the females presented the highest fat contents in the carcass. The glycogen liver contents were negatively affected by the feeding restriction programs and by the sex, however were not affected by the temperature.Key Words: abdominal fat, broiler chickens, carcass and noble cuttings yields, feeding restriction programs, sex, temperature, total fat Rev. bras. zootec., 29(4):1117-1123, 2000Introdução A temperatura ambiente é considerada o fator físico de maior efeito no desempenho de frangos de corte, já que exerce grande influência no consumo de ração e, com isto, afeta diretamente o ganho de peso e a conversão alimentar destes animais. Aves submetidas a temperaturas ambientais fora...

show abstract

Section: Methodsunclassified

Efeito da temperatura ambiente e da restrição alimentar sobre o desempenho e a composição da carcaça de frangos de corte

et al. 2000

View full text Add to dashboard Cite

show abstract

“…Exact heat-stress or hot-climate conditions are difficult to simulate in experi-Continuous selection for increased growth rate thus might increase sensitivity of broiler stocks to high temperatures, unless specific criteria for efficient performance under high temperatures are identified and applied in selection programs. Although in most studies (i.e., Kubena et al, 1972;Cerniglia et al, 1983;Howlider and Rose, 1989) the magnitude of the effect of high temperature was not dependent on sex, Osman et al (1989) found that the reduction in weight gain due to high temperatures appeared at a younger age and was larger in males than in females.…”

Section: Introductionmentioning

confidence: 96%

Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Cahaner¹,

Leenstra²

1992

Poultry Science

141

View full text Add to dashboard Cite

Male and female broiler chicks from five different broiler crosses (WI, LF, and HF = Israeli chicks selected for high body weight gain, and low and high abdominal fat, respectively; FC and WN = Dutch chicks selected for favorable feed conversion and high body weight gain, respectively) were raised at a high ambient temperature (32 to 33 C). Weight gain, protein and fat content in the carcass and feed, and protein efficiency were determined at 4, 6, and 8 wk of age. The effect of the high temperature was evaluated by comparing these data with those of similar chicks raised at a normal temperature (20 to 33 C) up to 6 wk of age. The reductions in body weight, protein gain, and feed and protein efficiency due to the high temperature increased with age and were much larger in males than in females. This trend was more pronounced in WI and WN chicks than in LF, HF, and FC chicks. Females of WI and WN crosses were as heavy as males at 6 wk and heavier at 8 wk. In LF, HF, and FC crosses, both sexes had similar weights at 8 wk. Growth reduction due to the high temperature was largest in the groups with the highest growth rate at the normal temperature (WI and WN males). Chicks with a lower growth rate and a higher capacity for energy storage in fat depots (all females, HF chicks), or a higher capacity for heat loss (FC chicks), were less affected by the high temperature. The results suggest that females should be preferred over males for broiler production in hot facilities or locations. Broiler genotypes selected for feed efficiency at the expense of fast growth may allow for a more profitable broiler production in high-temperature regions.

show abstract

“…However, the mortality for the birds acclimated to 10 to 12 C for 14 days (followed by acclimation to 28 to 30 C for 7 days prior to aflatoxin-dosing) was no different than that for the birds acclimated to 28 to 30 C for 21 days. DISCUSSION Numerous studies have been conducted to determine the effect of environmental temperature on the feed intake and performance of broiler chickens (Huston, 1965;Deaton et al, 1973Deaton et al, , 1978Hurwitz et al, 1980;Cerniglia et al, 1983;Reece and Lott, 1983). In most studies, measurements were made during the growing-finishing phase from 3 or 4 wk until 7 or 8 wk of age after the chicks were started at normal brooding temperatures.…”

Section: Resultsmentioning

confidence: 99%

Effect of Cold Acclimation on the Broiler Chicks' Resistance to Acute Aflatoxicosis

Manning

Wyatt

1990

Poultry Science

View full text Add to dashboard Cite

The effect of acclimation to environmental temperatures of 10 to 12, 14 to 16, or 28 to 30 C on the resistance of broiler chicks to acute aflatoxicosis was studied in a series of four experiments. Chicks acclimated to 10 to 12 C were more resistant to a single oral dose of aflatoxin (8 mg per kg of BW) after 10 and 20 days than chicks acclimated to 28 to 30 C. However, chicks acclimated to 14 to 16 C required 20 days of acclimation before an increase in resistance was observed. Acclimation to 10 to 12 C for 14 days followed by acclimation to 28 to 30 C for 7 days resulted in no increase in the resistance of the chicks to an aflatoxin dose (8 mg per kg of BW) at 21 days, indicating that the resistance conveyed by cold acclimation was temporary. Sodium-pentobarbital sleeping time was significantly decreased and the cytochrome P-450 content was significantly increased after acclimating broiler chicks to 10 to 12 C. These observations suggest that stimulation of the microsomal mono-oxygenase system after cold acclimation may be responsible for the increased resistance of the broiler chick to acute aflatoxicosis.

show abstract

The Effect of Constant Ambient Temperature and Ration on the Performance of Sexed Broilers

Cited by 27 publications

References 16 publications

Efeito da temperatura ambiente e da restrição alimentar sobre o desempenho e a composição da carcaça de frangos de corte

Efeito da temperatura ambiente e da restrição alimentar sobre o desempenho e a composição da carcaça de frangos de corte

Effects of High Temperature on Growth and Efficiency of Male and Female Broilers from Lines Selected for High Weight Gain, Favorable Feed Conversion, and High or Low Fat Content

Effect of Cold Acclimation on the Broiler Chicks' Resistance to Acute Aflatoxicosis

Contact Info

Product

Resources

About