Agelenids of the World

Systematics and Taxonomy of Agelenidae, a Worldwide distributed Spider Family

Low temperature acclimation in the desert spider, Agelenopsis aperta (Araneae, Agelenidae)

Publication Type:Journal Article
Year of Publication:1985
Authors:J. Lee, R. E., Baust J. G.
Journal:Journal of Arachnology
Date Published:1985
ISBN Number:0161-8202
Keywords:Abiotic factors, acclimation effects on oxygen consumption]., Agelenopsis aperta (Araneae)., Agelenopsis aperta [Oxygen consumption / / Low temperature acclimation, laboratory study] [Thermal acclimation / / Low, Metabolic rate, oxygen consumption relationship] [Temperature / / Low, Physical factors, relationship, temperature, Temperature relationships, Whole animal physiology

A. aperta (Gertsch) inhabits desert grasslands and lava beds in the southwestern USA. The capacity of this species to cold-harden was assessed by exposing 2nd generation laboratory-reared specimens to an artificial low temperature cycle simulating the summer-autumn-winter transition. Low temperature acclimation had no effect on whole body supercooling points, freeze tolerance or rates of O2 consumption. Elevated levels of cryoprotectants were not detected using high performance liquid chromatographic techniques. Cold tolerance was similar between males, females and immatures. Exposure to temperatures immediately above the whole body supercooling point cused no apparent injury. Movement into protected overwintering microhabitats may obviate the necessity for the evolution of seasonal mechanisms of cold-hardening in A. aperta.

URL:<Go to ISI>://ZOOREC:ZOOR12200013132
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