The Influence of Different Environmental Temperatures on Immature Fowl

Huston, Till M.

doi:10.3382/ps.0441032

Cited by 52 publications

(24 citation statements)

References 5 publications

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“…The use of physiological indicators for heat stress was mentioned by Huston (1965). H/L ratio was found to vary with change of temperature and other stressors (Siegel, 1980;Gross and Siegel, 1983;Kassab et al, 1992).…”

Section: Discussionmentioning

confidence: 96%

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Heterophil/lymphocyte ratio as a selection criterion for heat resistance in domestic fowls

Al‐Murrani

Kassab

Alsam

et al. 1997

British Poultry Science

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1. Two experiments were conducted to examine the Heterophil/Lymphocyte ratio (H/L) as criterion for selection for resistance to heat stress and some aspects of general resistance in domestic fowls. 2. The first experiment on a small sample (n = 64) of light breed Iraqi local fowls showed that this ratio could be used as an indicator of heat stress resistance. 3. The second experiment on a large sample (n = 1160) of heavy parent stock confirmed the results. It showed that there was a different H/L ratio for the two strains and that there was much individual variability in the H/L ratio within-strain that could be utilised for individual selection for heat resistance. 4. The H/L ratio was highly heritable; Resistant and Sensitive groups, defining all individuals with an H/L ratio over the upper 95% confidence limit as 'Sensitive' and those below as 'Resistant' produced progeny with significantly different H/L ratios. 5. There were indications of differences in mortality between the progeny of the Resistant and the Sensitive groups. 6. The H/L indicator could be used as a criterion to select for heat stress resistance.

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Section: Discussionmentioning

confidence: 96%

“…It is well documented that high temperatures adversely affect production and reproduction in poultry (Clark and Amin, 1965;Huston, 1965;Cowan and Michie, 1978). In hot climates this necessitates the use of cooling and ventilation systems which increase production costs and are only applicable in intensive production.…”

Section: Introductionmentioning

confidence: 97%

Heterophil/lymphocyte ratio as a selection criterion for heat resistance in domestic fowls

Al‐Murrani

Kassab

Alsam

et al. 1997

British Poultry Science

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“…M AXIMUM growth and feed efficiency are not attained when broilers are grown in environmental temperatures constantly above or below an optimal range for their age (Barott and Pringle, 1947, 1949, 1950Joiner and Huston, 1957;Squibb et al, 1959a;Prince et al, 1961;Adams et al, 1962;Huston, 1965). After four weeks of age, requirements become less stringent with a constant temperature within the range 15 to 27°C.…”

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confidence: 96%

Broiler Growth in Diurnally Cycling Temperature Environments

Siegel¹,

Drury²

1970

Poultry Science

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“…P REVIOUS studies showed that broiler chicks grown in a high temperature environment during the latter part of the production period had poorer growth rates and feed conversion than those grown in a more moderate temperature (Winn and Godfrey, 1967;Huston, 1965;Adams et al, 1962;Joiner and Huston, 19S7). Chicks grown in the open-wall, noninsulated-roof houses in some areas of the U. S. are not only subjected to high temperature and in some instances high temperature and humidity environments, but also to an additional radiant heat load from the hot roof, walls and surroundings.…”

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confidence: 97%