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- Title
Respiration studies on the Antarctic collembolan Cryptopygus antarcticus.
- Authors
Block, W.; .Tilbrook, P. J
- Abstract
Analyses are presented of 190 measurements of individual respiration rate for the complete size range of Cryptopygus antarcticus Willem. A Cartesian Diver micro-respirometer was used at Signy Island (Maritime Antarctic) during the austral summer 1911/72. Oxygen consumption per individual increased linearly with live weight on a log basis at 00, 5° and 10°C. The 5° and 10°C regression lines differed significantly and the weight exponent b varied from 0.669 to 0.825. Mean oxygen uptake rates for 5 size classes ranged from 0.67 1 to 22.610 μ1 × 10-3 O2 ind-1 h-1, and from 95.66 to 469.20 μ1 O2 g-1 h-1 over the temperature range studied. Juveniles showed least change in rate, and adults the maximum change, over 0° to 10°C. Egg respiration was 0.306 ul × 10-3 O2 h-1 at 5°C. Data are compared with other Antarctic Collembola, and temperate species. Comparison of respiration rates with cultured, acclimated animals showed considerable differences. Cultured juveniles have much higher rates, especially above 5°C, than field animals. Population metabolism as estimated for a typical habitat and cold adaptation is discussed.
- Subjects
VERTEBRATES; ANIMAL behavior; RESPIRATION; OXYGEN; HABITATS; BIOLOGICAL adaptation
- Publication
Oikos, 1975, Vol 26, Issue 1, p15
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3543271