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Thermal Limits Of Summer-Collected Pardosa Wolf Spiders (Araneae: Lycosidae) From The Yukon Territory And Greenland, Susan E. Anthony, Christopher M. Buddle, Toke T. Høye, Brent J. Sinclair
Thermal Limits Of Summer-Collected Pardosa Wolf Spiders (Araneae: Lycosidae) From The Yukon Territory And Greenland, Susan E. Anthony, Christopher M. Buddle, Toke T. Høye, Brent J. Sinclair
Biology Publications
Arctic and sub-Arctic terrestrial ectotherms contend with large daily and seasonal temperature ranges. However, there are few data available on the thermal biology of these high-latitude species, especially arachnids. We determined the lower and upper thermal limits of seven species of wolf spider from the genus Pardosa (Araneae: Lycosidae) collected in summer from the Yukon Territory (Canada) and Southern Greenland. None of these species survived freezing, and while spiderlings appeared freeze-avoidant, surviving to their supercooling point (SCP, the temperature at which they spontaneously freeze), chill-susceptible adults and juveniles died at temperatures above their SCP. The critical thermal minimum (CTmin, the …
Thermal Biology And Immersion Tolerance Of The Beringian Pseudoscorpion Wyochernes 4 Asiaticus, Susan E. Anthony, Christopher M. Buddle, Brent J Sinclair
Thermal Biology And Immersion Tolerance Of The Beringian Pseudoscorpion Wyochernes 4 Asiaticus, Susan E. Anthony, Christopher M. Buddle, Brent J Sinclair
Biology Publications
Wyochernes asiaticus (Arachnida: Pseudoscorpiones: Chernetidae) is a pseudoscorpion distributed across Beringia, the areas of Yukon, Alaska and Siberia that remained unglaciated at the last glacial maximum. Along with low temperatures, its streamside habitat suggests that submergence during flood events is an important physiological challenge for this species. We collected W. asiaticus in midsummer from 66.8N Yukon Territory, Canada, and measured thermal and immersion tolerance. Wyochernes asiaticus is freeze-avoidant, with a mean supercooling point of -6.9 C. It remains active at low temperatures (mean critical thermal minimum, CTmin, is -3.6 C) and has a critical thermal maximum (CTmax) of 37.8 C, …