Temperature preference in piglets weaned at 12–14 days of age

2007 ◽  
Vol 87 (3) ◽  
pp. 299-302 ◽  
Author(s):  
Clover J. Bench ◽  
Harold W. Gonyou
Keyword(s):  
Key Words ◽  
Operant Conditioning ◽  
Early Morning ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Preferred Temperatures ◽  
Key Words Temperature

Five replicates of 48 pigs each, weaned at 12–14 d of age, were observed. Mean preferred temperature was found to decrease during the night and early morning, and increase during the day. Average preferred temperatures were 26.3°C, 25.7°C, and 25.3 °C for 3, 4, and 5 wk of age, respectively. Key words: Temperature preference, pigs, early weaned, operant conditioning

Compilation of Temperature Preference Data

1977 ◽  
Vol 34 (5) ◽  
pp. 739-745 ◽  
Author(s):  
Charles C. Coutant
Keyword(s):  
Key Words ◽  
Laboratory Studies ◽  
Temperature Preference ◽  
Final Temperature ◽  
Temperature Selection ◽  
Preference Data ◽  
Current Information ◽  
Preference Behavior ◽  
Key Words Temperature

This report briefly summarizes current information from field and laboratory studies on temperature selection by fishes, with a tabulation of final temperature preferenda and upper and lower avoidance temperatures. Key words: temperature, selection, preferendum, avoidance, preference, behavior, orientation

Temperature preference in Triatoma infestans (Hemiptera: Reduviidae)

1991 ◽  
Vol 81 (3) ◽  
pp. 273-276 ◽  
Author(s):  
Claudio R. Lazzari
Keyword(s):  
Relative Humidity ◽  
Temperature Gradient ◽  
Video Recording ◽  
Daily Rhythm ◽  
Triatoma Infestans ◽  
Dark Phase ◽  
Thermal Preference ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Preferred Temperatures

AbstractThe thermal preference of adults of the reduviid bug Triatoma infestans (Klug) was investigated along a temperature gradient by means of video recording. The preferred temperature varied with a daily rhythm, reaching the highest value at the onset and the lowest at the end of the dark phase. The daily range of preferred temperatures depended on the starvation level. After feeding it was about 28–29°C, and after 12 days of starvation 25–26°C. The number of eggs laid showed a bimodal pattern, with maxima at 29°C and 26°C. Along a gradient of relative humidity, the bugs were always found around 40% r.h.

Temperature Preference of Several Species of Salmo and Salvelinus and Some of Their Hybrids

1979 ◽  
Vol 36 (9) ◽  
pp. 1137-1140 ◽  
Author(s):  
R. H. Peterson ◽  
A. M. Sutterlin ◽  
J. L. Metcalfe
Keyword(s):  
Brook Trout ◽  
Lake Trout ◽  
Female Parent ◽  
Intergeneric Hybrids ◽  
Horizontal Gradient ◽  
Vertical Temperature Gradient ◽  
Temperature Preference ◽  
Vertical Temperature ◽  
Preferred Temperatures ◽  
Key Words Temperature

Temperature preference of newly feeding fry of two species of Salmo, three species of Salvelinus, and seven hybrids were determined in a horizontal gradient. Fry of species in the genus Salmo and intergeneric hybrids with female parent in Salmo selected significantly higher temperatures (13.0–15.0 °C, P < 0.05) than did fry of species and hybrids of the genus Salvelinus (9.0–11.5 °C). No significant differences were obtained among species and hybrids within either of the two groups described above. Preferred temperatures of fingerlings (after 3 mo of feeding) of two species and two hybrids within Salvelinus were determined in a vertical temperature gradient. Brook trout preferred 17.5 °C, and lake trout 10.8 °C. The two hybrids (brook trout × lake trout and lake trout × brook trout) preferred intermediate temperatures (14.7 and 14.4 °C). Rainbow trout fingerlings selected 14.7 °C. Key words: temperature, preference, Salmo, Salvelinus, hybrids, gradients

Application of Temperature Preference Studies to Environmental Impact Assessment

1977 ◽  
Vol 34 (5) ◽  
pp. 746-749 ◽  
Author(s):  
James J. Gift
Keyword(s):  
Power Plant ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Key Words ◽  
Environmental Impact Assessment ◽  
Temperature Preference ◽  
Field Temperature ◽  
Key Words Temperature

Increasing use of laboratory and field temperature preference and avoidance data in power plant siting and environmental impact assessment studies has created a need for evaluation and standardization of methodologies. Relevant considerations and applications are discussed. Key words: temperature, preference, avoidance, power plant siting, environmental impact assessment

Temperature Selection of Rainbow Trout (Salmo gairdneri) Fingerlings in Vertical and Horizontal Gradients

1971 ◽  
Vol 28 (11) ◽  
pp. 1801-1804 ◽  
Author(s):  
R. W. McCauley ◽  
W. L. Pond
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Temperature Preference ◽  
Temperature Selection ◽  
Horizontal Gradients ◽  
Significant Difference ◽  
Preferred Temperatures ◽  
Laboratory Investigations ◽  
Horizontal Temperature Gradients ◽  
Selection Of

Preferred temperatures of underyearling rainbow trout (Salmo gairdneri) were determined in both vertical and horizontal temperature gradients. No statistically significant difference was found between the preferred temperatures by the two different methods. This suggests that the nature of the gradient plays a lesser role than generally believed in laboratory investigations of temperature preference.

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

Effects of Age and Overhead Illumination on Temperatures Preferred by Underyearling Rainbow Trout, Salmo gairdneri, in a Vertical Temperature Gradient

1978 ◽  
Vol 35 (11) ◽  
pp. 1430-1433 ◽  
Author(s):  
Wen-Hwa Kwain ◽  
Robert W. McCauley
Keyword(s):  
Rainbow Trout ◽  
Temperature Gradient ◽  
Temperature Gradients ◽  
Salmo Gairdneri ◽  
Vertical Temperature Gradient ◽  
Temperature Preference ◽  
Vertical Temperature ◽  
Preferred Temperature ◽  
Distribution Of Fish ◽  
Vertical Gradients

During their first 12 mo of life rainbow trout, Salmo gairdneri, preferred progressively cooler temperatures as they grew older; 19 °C was selected during the 1st mo and the selected temperature declined by intervals of 0.5 °C for each of the following months up to the 3rd mo. Fish swam higher in temperature gradients exposed to overhead illumination than in those in total darkness. This trend was reversed during the following 9 mo. These findings demonstrate the important role that age plays in the temperature preference of this species and the influence that overhead light may have on the distribution of fish in vertical gradients. Key words: preferred temperature, age, Salmo gairdneri, light gradients

Laboratory Methods for Determining Temperature Preference

1977 ◽  
Vol 34 (5) ◽  
pp. 749-752 ◽  
Author(s):  
Robert W. McCauley
Keyword(s):  
Temperature Gradient ◽  
Social Interactions ◽  
Physiological State ◽  
Thermal Gradients ◽  
Temperature Preference ◽  
Laboratory Methods ◽  
Preferred Temperature ◽  
Laboratory Techniques ◽  
Different Types ◽  
Temperature Preferences

Different types of temperature-gradient devices used in the laboratory to determine temperature preferences of fish are classified and reviewed. The type of device used seems to have less effect on experimental results than do other variables such as age, size, season, physiological state, or social interactions. Key words: preferred temperature, thermal gradients, thermoregulation, behavioral, gradient devices, laboratory techniques

Behavioral thermoregulation and locomotor activity of Perca flavescens

1979 ◽  
Vol 57 (11) ◽  
pp. 2239-2242 ◽  
Author(s):  
William Wallace Reynolds ◽  
Martha Elizabeth Casterlin
Keyword(s):  
Locomotor Activity ◽  
Yellow Perch ◽  
Local Minimum ◽  
Perca Flavescens ◽  
Behavioral Thermoregulation ◽  
Major Peak ◽  
Nocturnal Activity ◽  
Preferred Temperature ◽  
Preferred Temperatures ◽  
The Relationship

Ten yearling yellow perch (Perca flavescens) were tested individually for 3-day periods in electronic shuttleboxes to determine their diel patterns of behavioral thermoregulation and of locomotor activity relative to a natural April photoperiod, and to determine the relationship between preferred temperatures and activity. The perch exhibited a diel rhythm of preferred temperature, with a predawn minimum of 16.7 °C and a dusk maximum of 23.8 °C. The 24-h mean was 20.2 °C; the diurnal mean was 21.5 °C and the nocturnal mean was 18.5 °C. Locomotor activity (quantified as mean photocell-monitored light-beam interruptions per hour) was crepuscular, with a major peak (25 units/h) at dusk, and a smaller peak (14.4 units/h) at dawn. Nocturnal activity was slightly greater (5.3 units/h) than diurnal activity (4.4 units/h). Locomotor activity relative to temperature exhibited a local minimum (0.4–6.2 units/h) at 22.2 °C.

Effects of sexual maturation and sex steroid hormone treatment on the temperature preference of the guppy, Poecilia reticulata (Peters)

1980 ◽  
Vol 58 (4) ◽  
pp. 586-588 ◽  
Author(s):  
Peter H. Johansen ◽  
Jennifer A. Cross
Keyword(s):  
Temperature Gradient ◽  
Poecilia Reticulata ◽  
Steroid Hormone ◽  
Hormone Treatment ◽  
Sex Steroid ◽  
Horizontal Temperature Gradient ◽  
Temperature Preference ◽  
Preferred Temperature ◽  
Sex Steroid Hormone ◽  
Lower Temperature

In a horizontal temperature gradient, male guppies prefer a significantly lower temperature (24.5 °C) than females (28.2 °C) or juveniles (28.1 °C). Treatment of juveniles and females with testosterone lowers their preferred temperature to that of males. The reduction in the preferred temperature of testosterone-treated juveniles can occur without the development of male secondary sexual characters. Estrogen treatment of juveniles is without effect, as is treatment of males with estrogen or testosterone. It is postulated that testosterone acts at the level of the hypothalamic thermoregulatory centre.

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