The effect of acclimation temperature and the removal of peripheral temperature receptors on body temperature preference in the cockroach, Periplaneta americana

1986 ◽  
Vol 11 (4) ◽  
pp. 209-212 ◽  
Author(s):  
Bernard F. Murthy
Keyword(s):  
Body Temperature ◽  
Periplaneta Americana ◽  
Acclimation Temperature ◽  
Temperature Preference ◽  
Temperature Receptors ◽  
Peripheral Temperature

scholarly journals Temperature Sensitivity in the Prothoracic Ganglion of the Cockroach, Periplaneta Americana, and its relationship to Thermoregulation

1983 ◽  
Vol 105 (1) ◽  
pp. 305-315
Author(s):  
BERNARD F. MURPHY ◽  
JAMES E. HEATH
Keyword(s):  
Temperature Sensitivity ◽  
Periplaneta Americana ◽  
Acclimation Temperature ◽  
Central Temperature ◽  
Chill Coma ◽  
Wide Range ◽  
Prothoracic Ganglion ◽  
The Mean ◽  
Temperature Receptors ◽  
Peripheral Temperature

1. Activity of neurones in the prothoracic ganglion of the cockroach, Periplaneta americana, recorded extracellularly, showed a wide range of temperature sensitivity. These responses were categorized by linear regression. 2. The regression lines with the greatest slopes are proposed to characterize central temperature receptors; warm units with lower slopes may be the result of nonspecific Q10 responses of ordinary neurones. 3. An overlap of regression lines from cells with high slopes occurs near the acclimation temperature of the animals; the regression lines of most of the warm-sensitive units reach zero firing rate near the mean chill-coma temperature (10.5°C) for this species. 4. The temperature selection by the whole animal in a temperature gradient shuttlebox was found to require central temperature receptors as well as the peripheral temperature receptors on either the antennae or tarsi. 5. Both neural and behavioural data indicate a greater sensitivity to heat than cold in cockroach thermoregulatory behaviour.

Temperature Preference and Avoidance Responses of the Crayfish, Orconectes obscurus, and Associated Statistical Problems

1982 ◽  
Vol 39 (4) ◽  
pp. 548-553 ◽  
Author(s):  
Dilip Mathur ◽  
Robert M. Schutsky ◽  
Edmund J. Purdy Jr.
Keyword(s):  
Acclimation Temperature ◽  
Published Data ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Field Collection ◽  
Method Of Calculation ◽  
Final Preferred Temperature ◽  
Statistical Problems ◽  
Avoidance Responses

Acute temperature selection and avoidance responses of the crayfish, Orconectes obscurus, acclimated at field collection temperatures of 1.5–26.0 °C and determined in a spatial thermal gradient, were similar to those noted for fishes. Acclimation temperature was positively correlated with the acute preferred and avoided temperatures; both were several degrees higher than the acclimation temperature. A large proportion of the total variance in these data was unexplained. Most variable responses occurred at low acclimation temperatures. The estimated final preferred temperature ranged from 29.8 to 33.9 °C depending upon the method of calculation. Methods of estimating final preferenda from acute tests are considered arbitrary due to statistical problems and the associated high variability. Statistical problems were also noted in the determination of avoidance temperatures of crayfish due to nonindependence of observations on the same organism. No differences were noted (P < 0.05) between the preferred or avoided temperatures when the direction of field temperatures was rising or falling. A statistical comparison of the new and published data on this species revealed general similarities, particularly over an acclimation temperature range of 18.0–30.0 °C. The analysis minimizes the importance of site-specific studies on this species using the current acute testing methods.Key words: crayfish, temperature preference, avoidance, populational variation, statistics, experimental and statistical problems

Peripheral body temperature and thermogenic drinking in cold-treated rats

1975 ◽  
Vol 39 (6) ◽  
pp. 965-968 ◽  
Author(s):  
E. L. Nelson ◽  
M. J. Fregly ◽  
P. E. Tyler
Keyword(s):  
Body Temperature ◽  
Ambient Temperature ◽  
Skin Temperature ◽  
Water Intake ◽  
Abrupt Change ◽  
Rapid Change ◽  
Specific Pattern ◽  
Colonic Temperature ◽  
Peripheral Temperature

Transfer of rats abruptly from air at 5 degrees C to air at 26 degrees C was accompanied by a significant increase in water intake (thermogenic drinking) during the first hour after transfer. A possibility existed that the increased water intake observed under these conditions was attributable to the rapid change in skin temperature. Thus, the objective of this study was to determine the effect on thermogenic drinking of a slow, as opposed to an abrupt, change in ambient temperature. The results indicated that warming room air rates of either 0.5 or 1.0 centigrade deg/min had no effect on thermogenic drinking when compared with the water intake of rats removed abruptly from cold. Thermogenic drinking does not appear to be initiated by a specific pattern of changes in peripheral temperature relative to colonic temperature.

scholarly journals Drosophila Temperature Preference Rhythms: An Innovative Model to Understand Body Temperature Rhythms

2019 ◽  
Vol 20 (8) ◽  
pp. 1988 ◽  
Author(s):  
Tadahiro Goda ◽  
Fumika N. Hamada
Keyword(s):  
Locomotor Activity ◽  
Body Temperature ◽  
The Body ◽  
Metabolic Energy ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Activity Rhythms ◽  
Temperature Rhythm ◽  
Body Temperature Rhythm ◽  
Human Body Temperature

Human body temperature increases during wakefulness and decreases during sleep. The body temperature rhythm (BTR) is a robust output of the circadian clock and is fundamental for maintaining homeostasis, such as generating metabolic energy and sleep, as well as entraining peripheral clocks in mammals. However, the mechanisms that regulate BTR are largely unknown. Drosophila are ectotherms, and their body temperatures are close to ambient temperature; therefore, flies select a preferred environmental temperature to set their body temperature. We identified a novel circadian output, the temperature preference rhythm (TPR), in which the preferred temperature in flies increases during the day and decreases at night. TPR, thereby, produces a daily BTR. We found that fly TPR shares many features with mammalian BTR. We demonstrated that diuretic hormone 31 receptor (DH31R) mediates Drosophila TPR and that the closest mouse homolog of DH31R, calcitonin receptor (Calcr), is essential for mice BTR. Importantly, both TPR and BTR are regulated in a distinct manner from locomotor activity rhythms, and neither DH31R nor Calcr regulates locomotor activity rhythms. Our findings suggest that DH31R/Calcr is an ancient and specific mediator of BTR. Thus, understanding fly TPR will provide fundamental insights into the molecular and neural mechanisms that control BTR in mammals.

scholarly journals The role of PDF neurons in setting the preferred temperature before dawn in Drosophila

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Xin Tang ◽  
Sanne Roessingh ◽  
Sean E Hayley ◽  
Michelle L Chu ◽  
Nobuaki K Tanaka ◽  
...  
Keyword(s):  
Body Temperature ◽  
Neural Circuit ◽  
Sleep Regulation ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Pigment Dispersing Factor ◽  
Temperature Rhythm ◽  
Body Temperature Rhythm ◽  
Serotonin Signaling

Animals have sophisticated homeostatic controls. While mammalian body temperature fluctuates throughout the day, small ectotherms, such as Drosophila achieve a body temperature rhythm (BTR) through their preference of environmental temperature. Here, we demonstrate that pigment dispersing factor (PDF) neurons play an important role in setting preferred temperature before dawn. We show that small lateral ventral neurons (sLNvs), a subset of PDF neurons, activate the dorsal neurons 2 (DN2s), the main circadian clock cells that regulate temperature preference rhythm (TPR). The number of temporal contacts between sLNvs and DN2s peak before dawn. Our data suggest that the thermosensory anterior cells (ACs) likely contact sLNvs via serotonin signaling. Together, the ACs-sLNs-DN2s neural circuit regulates the proper setting of temperature preference before dawn. Given that sLNvs are important for sleep and that BTR and sleep have a close temporal relationship, our data highlight a possible neuronal interaction between body temperature and sleep regulation.

scholarly journals Effect of thermal acclimation on thermal preference, resistance and locomotor performance of hatchling soft-shelled turtle

2013 ◽  
Vol 59 (6) ◽  
pp. 718-724 ◽  
Author(s):  
Mei-Xian Wu ◽  
Ling-Jun Hu ◽  
Wei Dang ◽  
Hong-Liang Lu ◽  
Wei-Guo Du
Keyword(s):  
Body Temperature ◽  
Thermal Conditions ◽  
Thermal Acclimation ◽  
Acclimation Temperature ◽  
Locomotor Performance ◽  
Thermal Preference ◽  
Body Temperatures ◽  
Pelodiscus Sinensis ◽  
Turtle Species ◽  
The Difference

Abstract The significant influence of thermal acclimation on physiological and behavioral performance has been documented in many ectothermic animals, but such studies are still limited in turtle species. We acclimated hatchling soft-shelled turtles Pelodiscus sinensis under three thermal conditions (10, 20 and 30°C) for 4 weeks, and then measured selected body temperature (Tsel), critical thermal minimum (CTMin) and maximum (CTMax), and locomotor performance at different body temperatures. Thermal acclimation significantly affected thermal preference and resistance of P. sinensis hatchlings. Hatchling turtles acclimated to 10°C selected relatively lower body temperatures and were less resistant to high temperatures than those acclimated to 20°C and 30°C. The turtles’ resistance to low temperatures increased with a decreasing acclimation temperature. The thermal resistance range (i.e. the difference between CTMax and CTMin, TRR) was widest in turtles acclimated to 20°C, and narrowest in those acclimated to 10°C. The locomotor performance of turtles was affected by both body temperature and acclimation temperature. Hatchling turtles acclimated to relatively higher temperatures swam faster than did those acclimated to lower temperatures. Accordingly, hatchling turtles acclimated to a particular temperature may not enhance the performance at that temperature. Instead, hatchlings acclimated to relatively warm temperatures have a better performance, supporting the “hotter is better” hypothesis.

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