Effects of Thermal-Induced Respiratory Alkalosis on Blood Ionized Calcium Levels in the Domestic Hen

Odom, T.W.; Harrison, Paul C.; Bottje, Walter

doi:10.3382/ps.0650570

Cited by 73 publications

(32 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The elevation of blood lactate in heatstressed birds (Frankel, 1965;Frankel and Frascella, 1968;Odom et at., 1986) probably results from an inhibition of gluconeogenesis by elevations in tissue pH (Hood and Tannen, 1983). Although there is considerable evidence indicating that plasma lactate is sensitive to blood pH of the animal (Hood and Tannen, 1983;Odom, 1987;Ono and Odom, 1988), a clear relationship between blood pH and lactate levels is not apparent in the present study.…”

Section: Discussionmentioning

confidence: 99%

Physiological Responses of Heat-Stressed Broilers Fed Nicarbazin

et al. 1989

Self Cite

View full text Add to dashboard Cite

Two experiments were conducted to determine physiological responses in heat-stressed broilers fed a control diet or one containing 125 ppm Nicarbazin. Male birds were surgically implanted with a carotid catheter and fitted with a chest movement transducer and rectal probe. In Experiment 1, birds were exposed to an abrupt change from thermoneutral (22.5 C, 70% relative humidity [RH]) to heat stress (37 C and 40 to 50% RH) conditions within 10 min and maintained in this environment for 120 min. In Experiment 2, birds were exposed to a gradual change from thermoneutral to heat stress (38 C, 68% RH) conditions over 4 h and maintained in this environment for an additional 1 h. Heart rate (HR), respiration rate (RR), and body temperature (Tb) were monitored throughout each experiment, and arterial samples were obtained for determination of acid-base balance and lactate. Birds fed Nicarbazin had higher (P less than .05) Tb and lower (P less than .05) blood PCO2 and bicarbonate during heat stress than controls in both experiments. Thermal polypnea was observed in both experiments, but, although there were no treatment differences in Experiment 1, RR was lower (P less than .05) in the last hour of heat stress for Nicarbazin-fed birds in Experiment 2. In the second experiment, birds fed Nicarbazin exhibited higher (P less than .05) HR and blood lactate during heat stress than control-fed birds. The results of this study indicate that Nicarbazin, by an as yet unidentified mechanism, increases Tb in heat-stressed birds, which results in greater deviations in blood acid-base balance, blood lactate, and HR than in control-fed birds.

show abstract

Section: Discussionmentioning

confidence: 99%

Physiological Responses of Heat-Stressed Broilers Fed Nicarbazin

et al. 1989

Self Cite

View full text Add to dashboard Cite

show abstract

“…To date, no direct evidence for age-dependent decreases in Ca 2+ secretion by the shell gland epithelium have been reported, but reductions in HCO 3 -secretion have been shown to significantly decrease calcite deposition. Limiting HCO 3 -secretion by reducing plasma CO 2 , which can occur in heat-stressed birds, or by treating hens with carbonic anhydrase inhibitors, typically leads to reduced shell thickness (Hughes et al, 1986;Odom et al, 1986;Mashaly et al, 2004;Lavelin et al, 2001). Thus decreased rates of HCO 3 -secretion may contribute to the problem of poor shell quality often observed in older birds.…”

Section: Discussionmentioning

confidence: 99%

Sodium and anion transport across the avian uterine (shell gland)epithelium

Vetter

O’Grady

2005

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…Prolonged exposure to high environmental temperature causes peripheral blood vessels to dilate. Heat cramps may ensue, due to the subsequent loss of salt and deranged electrolyte balance (7)(8)(9)(10)(11)(12)(13). J ) This research was supported by a grant from GIARA -German-Israel Agricultural Research Association.…”

Section: Introductionmentioning

confidence: 98%

The Relationship between Heat Stress, Survivability and Blood Composition of the Domestic Chicken

Bogin

Avidar²,

Pech‐Waffenschmidt³

et al. 1996

CCLM

View full text Add to dashboard Cite

In order to better understand the metabolic changes leading to death which take place in the chicken during acute heat stress, the blood composition was determined in surviving and non-surviving chickens. The following blood analytes were determined: glucose, uric acid, serum total proteins, inorganic phosphate, total and ionized calcium, sodium, potassium, triiodothyronine, thyroxine. The haematocrit, erythrocyte creatine kinase (total and the isoenzymes) and haemoglobin fractions were also measured. Blood was taken from the wing vein before and after heat stress.Eight-week-old "Anak 2000" broilers were kept in a climate chamber at 24 °C/40% relative humidity during a 14-hour day, and at 20 °C/40% relative humidity during a 10-hour night. The birds were subjected to heat stress by exposing them to 40 °C/30% relative humidity for 3 hours.Significant differences between heat-stressed surviving and non-surviving chickens were seen in the blood levels of glucose, uric acid, total and ionized calcium, potassium, triiodothyronine, erythrocyte creatine kinase (total and isoenzymes). Differences were also seen in the levels and ratio of the 2 haemoglobin fractions.The significance of these changes, and their potential use as markers for heat resistance is discussed.

show abstract

Effects of Thermal-Induced Respiratory Alkalosis on Blood Ionized Calcium Levels in the Domestic Hen

Cited by 73 publications

References 9 publications

Physiological Responses of Heat-Stressed Broilers Fed Nicarbazin

Physiological Responses of Heat-Stressed Broilers Fed Nicarbazin

Sodium and anion transport across the avian uterine (shell gland)epithelium

The Relationship between Heat Stress, Survivability and Blood Composition of the Domestic Chicken

Contact Info

Product

Resources

About