Selected Body Temperature and Thermoregulatory Behavior in the Sit-and-Wait Foraging Lizard Pseudocordylus melanotus melanotus

2009 ◽  
Vol 23 (1) ◽  
pp. 108-122 ◽  
Author(s):  
Suzanne McConnachie ◽  
Graham J. Alexander ◽  
Martin J. Whiting
Keyword(s):  
Body Temperature ◽  
Thermoregulatory Behavior ◽  
Selected Body Temperature

scholarly journals Thermoregulatory Behavior and Body Temperature in Chicks of Willow Grouse (Lagopus Lagopus Lagopus)

1975 ◽  
Vol 54 (4) ◽  
pp. 1174-1179 ◽  
Author(s):  
Kjell Myhre ◽  
Michel Cabanac ◽  
Grete Myhre
Keyword(s):  
Body Temperature ◽  
Thermoregulatory Behavior ◽  
Lagopus Lagopus ◽  
Willow Grouse

Selected body temperature and thermal tolerance of tadpoles of two frog species (Fejervarya limnocharis and Microhyla ornata) acclimated under different thermal conditions

2012 ◽  
Vol 32 (2) ◽  
pp. 465-471
Author(s):  
张克勤 ZHANG Keqin ◽  
邓秋香 DENG Qiuxiang ◽  
Justin Liu Justin Liu ◽  
蒋诗梦 JIANG Shimeng ◽  
张左娇 ZHANG Zuojiao ◽  
...  
Keyword(s):  
Body Temperature ◽  
Thermal Tolerance ◽  
Thermal Conditions ◽  
Frog Species ◽  
Selected Body Temperature ◽  
Fejervarya Limnocharis

Role of central chemoreceptors in behavioral thermoregulation of the toad, Bufo marinus

1994 ◽  
Vol 266 (5) ◽  
pp. R1483-R1487 ◽  
Author(s):  
L. G. Branco ◽  
S. C. Wood
Keyword(s):  
Body Temperature ◽  
Oxygen Saturation ◽  
Fourth Ventricle ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Behavioral Thermoregulation ◽  
Peripheral Stimulus ◽  
Central Chemoreceptors ◽  
Selected Body Temperature

We tested the hypothesis that hypercapnia will induce behavioral hypothermia in toads and that central chemoreceptors are involved in this response. Animals were tested in an enclosed temperature gradient supplied with different gas mixtures. Fractional inspired CO2 (FICO2) between 0 and 0.05 had no significant effect on selected body temperature, but FICO2 between 0.06 and 0.10 reduced the selected body temperature from U approximately 28 to 18 degrees C. To determine if the hypercapnia-induced hypothermia is mediated by acidification of central chemoreceptors, the pH of the fourth ventricle was kept constant by perfusion with mock cerebrospinal fluid of pH 7.7 or 7.1 (normal and acidic values, respectively). Ventricular perfusion at pH 7.7 under normocapnic conditions had no effect on body temperature. Hypercapnia (FICO2 0.08) failed to induce hypothermia when the fourth ventricle was kept at pH 7.7 and when hyperoxia was present. Acidic ventricular perfusion under normocapnic conditions decreased selected body temperature from 27 to 25 degrees C, a significant drop but much less than that due to hypercapnia producing the same brain pH, suggesting an important role of peripheral chemoreceptors. The physiological significance of behavioral hypothermia and nature of the peripheral stimulus were evaluated by measuring the effect of hypercapnia on arterial oxygen saturation, PO2, and pH at 15 and 25 degrees C. Arterial oxygen saturation was higher at the lower temperature. Increasing FICO2 decreased oxygen saturation at 25 degrees C but not at 15 degrees C. Arterial PO2 increased with increasing inspired CO2. This increase was greater at 15 degrees C than at 25 degrees C. Arterial pH decreased at both temperatures.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Selected body temperature of nine species of Mexican horned lizards (Phrynosoma)

2015 ◽  
Vol 86 (1) ◽  
pp. 275-278 ◽  
Author(s):  
Rafael A. Lara-Reséndiz ◽  
Diego M. Arenas-Moreno ◽  
Elizabeth Beltrán-Sánchez ◽  
Weendii Gramajo ◽  
Javier Verdugo-Molina ◽  
...  
Keyword(s):  
Body Temperature ◽  
Horned Lizards ◽  
Selected Body Temperature

Melatonin and thermoregulation in ectothermic vertebrates: a review

2003 ◽  
Vol 81 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Deborah I Lutterschmidt ◽  
William I Lutterschmidt ◽  
Victor H Hutchison
Keyword(s):  
Body Temperature ◽  
Pineal Gland ◽  
Behavioral Thermoregulation ◽  
Review Of The Literature ◽  
Thermoregulatory Behavior ◽  
Pineal Complex ◽  
Set Point ◽  
Environmental Stimuli ◽  
Interspecific Differences

Precise behavioral thermoregulation is well documented in many ectothermic vertebrates. However, many complexities involving the influence of the pineal gland and melatonin (MEL) on thermoregulatory behavior, and thus body temperature (Tb), remain unresolved. Although MEL is commonly considered to decrease Tb in both endotherms and ectotherms, several ectothermic species do not modulate Tb in response to MEL. Furthermore, it is not yet clear how MEL integrates thermoregulatory behavior with environmental stimuli or how it modulates Tb. Some inferences about MEL action in endotherms are not applicable to ectotherms. Changes in ectothermic Tb are mediated primarily through behavioral modulation (not physiological modulation as in endotherms). Thus, the most likely mechanism underlying MEL's actions on ectothermic Tb is adjustment of the temperature set point in the hypothalamus. We provide a review of the literature addressing the effects of MEL on thermoregulatory behavior in ectothermic vertebrates. We also discuss mechanisms underlying MEL's influence on physiological and behavioral processes in ectotherms and hypotheses regarding interspecific differences in pineal complex and MEL function.

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