QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online January 31, 2007
Journal of Experimental Biology 210, 593-601 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.02691

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in JEB Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Hawes, T. C. Articles by Convey, P. Search for Related Content PubMed PubMed Citation Articles by Hawes, T. C. Articles by Convey, P.

Plasticity and superplasticity in the acclimation potential of the Antarctic mite Halozetes belgicae (Michael)

T. C. Hawes^1,*, J. S. Bale¹, M. R. Worland² and P. Convey²

¹ Department of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
² British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET, UK

View larger version (39K): [in this window] [in a new window]   Fig. 1. Scanning electron micrograph of (A) Halozetes belgicae with (B) Alaskozetes antarcticus for comparison. nm, notogastral margin. Scale bars, 200 µm (A); 100 µm (B).

View larger version (56K): [in this window] [in a new window]   Fig. 2. Halozetes belgicae cleared in lactic acid without (A) and with (B) gut boli (gb).

View larger version (27K): [in this window] [in a new window]   Fig. 3. Acclimation and acclimatisation in Halozetes belgicae at (A) weekly timescales; after 1 week acclimation at 10°C (white bars) and 5°C (black bars); (B) seasonal timescales – snapshot samples of field-fresh animals on the 5 February (white bars), 12 February (grey bars) and 28 February (black bars); (C) diurnal timescales: snapshot sampling of field-fresh animals over 7–11 February; filled circles, mean temperature of the rock surface for the 4 h prior to sampling; open circles, median SCP. Values are means ± s.e.m. (for N values, see text).

View larger version (6K): [in this window] [in a new window]   Fig. 4. Effects of starvation and ice inoculation on the SCPs of mites acclimated at 5°C (grey bars) and 10°C (white bars). U, untreated; I, inoculated; S, starved. *Significant different from `U'; bars represent interquartile range; horizontal line through bars represents median; whiskers represent upper and lower limits of observations.

View larger version (6K): [in this window] [in a new window]   Fig. 5. Effect of cooling rate on the SCPs of mites acclimated at 5 (grey bars) and 10°C (white bars).

View larger version (14K): [in this window] [in a new window]   Fig. 6. RCH in 5°C acclimated mites then held for various times at 0°C (A), –5°C (B) and –10°C (C). *Significantly different (P0.05); ***highly significant different (P0.001).

View larger version (16K): [in this window] [in a new window]   Fig. 7. RCH in 10°C acclimated mites then held for various times at 0°C (A), –5°C (B) and –10°C (C). *Significantly different (P0.05); ***highly significant different (P0.001).

View larger version (12K): [in this window] [in a new window]   Fig. 8. Comparison of effect of cooling to –12°C on untreated and rapidly cold hardened (4 h at 0°C) mites from 5°C and 10°C. (A) Chill coma temperature; (B) recovery temperature; (C) survival. Mean values are ± 1 s.e.m. *Significantly different (P0.05); ***highly significant different (P0.001).

View larger version (9K): [in this window] [in a new window]   Fig. 9. Effect of return to acclimation temperature on the SCPs of acclimated at 5°C (A) and 10°C (B) mites rapidly cold hardened at 0°C for 12 h.