Journal ArticleDOI
Thermal preference of the yellow-margined box turtle ( Cuora flavomarginata ) (Testudines: Geoemydidae) inhabiting a mesic lowland forest, northern Taiwan
Tien Hsi Chen,Kuang Yang Lue +1 more
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TLDR
The results do not support the previous predictions that gravid C. flavomarginata may select higher environmental temperatures prior to nesting season and there were significantly intersexual differences in mean weekly shell surface temperature during nesting season.Abstract:
Thermal preference of free-living yellow-margined box turtle, Cuora flavomarginata , was studied in a mesic forested habitat using a combination of radiotransmitters and temperature dataloggers attached to individual turtles. Patterns of mean weekly shell surface temperature variation of selected individuals were highly related to seasonal change of environmental temperature, with a peak temperature of 24.5-25.1°C in males and 26.0-27.0°C in females during June and July. Minimum shell surface temperature occurred in late January (4.5-7.6°C). Despite a small sample size, there were significantly intersexual differences in mean weekly shell surface temperature during nesting season. Individual females of C. flavomarginata tended to maintain higher shell surface temperature during nesting season (May-July). This difference was mostly pronounced during the day. There were no obviously intersexual differences prior to and after nesting season. Our results do not support the previous predictions that gravid C. flavomarginata may select higher environmental temperatures prior to nesting season.read more
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Spatial Ecology and Seasonal Activity of Blanding's Turtles (Emydoidea blandingii) in Ontario, Canada
TL;DR: The results highlight the importance of stratifying field observations and spatial data by reproductive class and time and including terrestrial habitat in home-range analyses of Blanding's Turtles.
Journal ArticleDOI
The Effects of Sex and Season on Patterns of Thermoregulation in Blanding's Turtles (Emydoidea blandingii) in Ontario, Canada
TL;DR: Differences in behavior and thermal habitat requirements between reproductive classes and season must be considered in management plans for conservation efforts to be effective, and the importance of stratifying field observations and thermoregulation data by reproductive class and time is highlighted.
Journal ArticleDOI
Mass mortality of eastern box turtles with upper respiratory disease following atypical cold weather.
TL;DR: There was a significant negative effect of daily environmental temperature deviation from the 3 mo mean on survival, suggesting that rapid decreases in environmental temperature were correlated with mortality.
Journal ArticleDOI
The blood biochemistry of overwintering diamondback terrapins (Malaclemys terrapin)
TL;DR: This study demonstrates that terrapins in their natural environment are able to maintain biochemical homeostasis throughout winter, and the use of evasive behavioral strategies may be an important factor for terrapin to reduce the passive exchange of water and salts with the estuarine environment.
Journal ArticleDOI
Factors affecting temperature variation and habitat use in free-ranging diamondback terrapins
TL;DR: This study contributes to a fuller understanding of terrapin thermal biology and provides support for using dataloggers to investigate behavior and habitat use of aquatic ectotherms inhabiting dynamic environments.
References
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Journal ArticleDOI
Ecology and physiology of hibernation and overwintering among freshwater fishes, turtles, and snakes
TL;DR: Freshwater fishes are the most northerly of freshwater ectotherms, followed by frogs, and North American freshwater snakes, turtles, and salamanders do not range farther north than southernmost Canada.
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Habitat use by black rat snakes (elaphe obsoleta obsoleta) in fragmented forests
TL;DR: The results collectively are most consistent with the hypothesis that rat snakes use edges for thermoregulation reasons, and the negative impact of the snakes on nesting birds may be coinci- dental; the snakes primarily use edge habitats for reasons other than foraging but opportunistically exploit prey they encounter there.
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Proximate and Evolutionary Constraints on Energy Relations of Reptiles
TL;DR: Because reptile eggs contain all of the chemical energy available to developing embryos, interactions between the level of parental investment in each offspring and egg size must, by definition, occur.
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The measurement of growth
TL;DR: In this article, a regression formula is derived for estimating a student's true gain from his initial and final test scores, and a numerical example is given, illustrating some marked inadequacies of the simple, "common-sense" procedure that estimates gain by subtracting initial from final score.