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Respiratory metabolism in two species of carabid beetle from the sub-Antarctic island of South Georgia

Todd, C. M.. 1997 Respiratory metabolism in two species of carabid beetle from the sub-Antarctic island of South Georgia. Polar Biology, 18 (3). 166-171. 10.1007/s003000050173

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Abstract/Summary

The influence of feeding state on cold-adapted metabolism was investigated in the adults of two carabid beetles, Trechisibus antarcticus and Oopterus soledadinus (Coleoptera: Carabidae), which have been introduced to sub-Antarctic South Georgia. The metabolic rates in both fed and starved O. soledadinus and T. antarcticus were determined at eight temperatures ranging from 0 to 35°C, using a Servomex 570A oxygen analyser. There was no significant difference in the metabolic rates between the fed and starved animals of each species. In T. antarcticus this ranged from 0.28 to 3.84 ml O2 g−1 h−1, and in O. soledadinus from 0.19 to 2.80 ml O2 g−1 h−1 at 0 and 35°C, respectively. In each of the four experimental groups there was a strong positive correlation between metabolic rate and temperature, with the highest increase occurring between 0 and 5°C. In contrast, the metabolic rate was significantly negatively correlated with initial live weight of the beetles at most temperatures. The results are discussed comparatively with other species and against a background of the ecology of the two carabids at South Georgia.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s003000050173
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 0722-4060
Date made live: 05 Oct 2016 08:30 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/514740

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