Heat Losses of White Leghorn Laying Hens As Affected by Intermittent Lighting Schedules

Riskowski, G. L.; DeShazer, J. A.; Mather, F. B.

doi:10.13031/2013.35636

Cited by 15 publications

(16 citation statements)

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“…g/(h bird) and was 1.76 g/(h kg) or 2.64 g/(h-bird) for Riskowski et al (1978). The lower bird MP value for Riskowski et al (1978) may have caused the associated ventilation rate to remain consistently low.…”

Section: Ventilation Graphsmentioning

confidence: 96%

“…The bird data from Chepete and Xin (2002a) and Riskowski et al (1978) would demonstrate how the use of bird values would impact the ventilation rate as compared to the use of room values.…”

Section: Ventilation For Moisture Controlmentioning

confidence: 99%

“…The lower bird MP value for Riskowski et al (1978) may have caused the associated ventilation rate to remain consistently low.…”

Section: Ventilation Graphsmentioning

confidence: 99%

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Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Cheng

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Section: Ventilation Graphsmentioning

confidence: 96%

“…The bird data from Chepete and Xin (2002a) and Riskowski et al (1978) would demonstrate how the use of bird values would impact the ventilation rate as compared to the use of room values.…”

Section: Ventilation For Moisture Controlmentioning

confidence: 99%

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Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Cheng

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“…Specific sensible heat (SH) and MP data from the bird only (bird MP) was obtained from Chepete and Xin (2002a) and Riskowski et al (1978) while that from the birds and surroundings (room MP) was obtained from Chepete and Xin (2002a) and Albright (1990). The room data from Albright (1990) represent data that are currently used in the ASAE standards and can be compared with the new data by Chepete and Xin (2002a).…”

Section: Ventilation For Moisture Controlmentioning

confidence: 99%

“…In order to make comparisons between the graphs, specific SH and MP data from different literature sources, namely, Xin (2002a), Albright (1990), and Riskowski et al (1978), were used. The ventilation rate calculations for both temperature and moisture control were based on bird mass of 1.5 kg.…”

Section: Ventilation Graphsmentioning

confidence: 99%

Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Cheng

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Release of heat, moisture and carbon dioxide in an aviary system for laying hens

Wachenfelt¹,

Pedersen²,

Gustafsson³

2001

British Poultry Science

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1. Production of total heat, divided into sensible and latent heat, together with carbon dioxide and animal activity were determined at different ambient temperatures under full-scale conditions in an aviary system with loose-housed laying hens. 2. Sensible heat production decreased approximately linearly with increasing ambient temperature and was lower during the day than at night. One explanation may be that some sensible heat produced by the hens was converted to latent heat by evaporation of moisture due to increased activity of the hens during the day (scratching in the bedding and drinking/waste water). 3. Latent heat production increased with increasing ambient temperature and was higher during the day than at night. This confirms that the hens, by agitating the bedding during the day and by spilling drinking water, transferred some sensible heat to latent heat by evaporation. 4. Total heat production decreased with increasing temperature because the hens by thermoregulation decreased their metabolism in order to maintain a constant body temperature. The difference between day and night values of total heat production was less pronounced than in the case of sensible and latent heat. In comparison with current guidelines the measurements showed a higher total heat production (22% higher at 20 degrees C). 5. There was a large diurnal variation in carbon dioxide production, closely correlated to measured animal activity; on average carbon dioxide production during the 12-h dark period was only 66% of the production during the day.

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Heat Losses of White Leghorn Laying Hens As Affected by Intermittent Lighting Schedules

Cited by 15 publications

References 0 publications

Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Mechanisms of somatostatin-induced paradoxical increase in insulin secretion in the presence of arginine vasopressin in clonal [beta]-cell HIT-T15

Release of heat, moisture and carbon dioxide in an aviary system for laying hens

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