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Cold Hardiness and Range of the Myriapod Angarozonium Amurense (Polyzoniidae, Diplopoda, Arthropoda) in Permafrost Environments

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BACKGROUND: Angarozonium amurense (Gerstfeldt, 1859) is the only one out of more than a hundred diplopod species described in Siberia and the Far East that inhabits regions with solid permafrost. OBJECTIVE: To evaluate the cold hardiness of A. amurense that allows this species to inhabit permafrost regions. METHODS: The survival temperature thresholds and supercooling points (SCP) were measured. RESULTS: The temperature thresholds for adult animals' survival are -8.5°C in summer and -27°C in winter. Average SCP decreases from -7.7±0.3°C in summer to -16.9±0.5°C in winter. Water content decreases from 55.7±1.9°% in summer to 49.4±1.6% in winter. CONCLUSION: The cold hardiness of A. amurense sets the record in this class of animals. It allows it to overwinter in the upper 15 centimeters layer of soil in most biotopes of the coldest permafrost regions in North Asia.
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Keywords: ANGAROZONIUM AMURENSE; COLD HARDINESS; DIPLOPODA; PERMAFROST

Document Type: Research Article

Publication date: 2015-07-01

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  • CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation

    The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.

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