THERMAL TOLERANCE OF 2 SPECIES OF MARINE CRAB, CANCER-PAGURUS AND CARCINUS-MAENAS

Citation
M. Cuculescu et al., THERMAL TOLERANCE OF 2 SPECIES OF MARINE CRAB, CANCER-PAGURUS AND CARCINUS-MAENAS, Journal of thermal biology, 23(2), 1998, pp. 107-110
Citations number
21
Categorie Soggetti
Biology Miscellaneous",Zoology
Journal title
ISSN journal
03064565
Volume
23
Issue
2
Year of publication
1998
Pages
107 - 110
Database
ISI
SICI code
0306-4565(1998)23:2<107:TTO2SO>2.0.ZU;2-5
Abstract
The critical thermal maxima of adult Carcinus maenas and Cancer paguru s have been determined. The CTMax for the eurythermal C. maenas were s ignificantly higher than for the stenothermal C. pagurus at each accli mation condition, as would be predicted. Acclimation had a significant effect in both species, with 22 degrees C acclimated crabs having sig nificantly higher CTMax than 8 degrees C acclimated crabs. The acclima tion ability (AAR response) was greater in C. pagurus than in C. maena s, suggesting that the ability for acclimation is not directly related to eurythermicity. There was a marked seasonal effect on CTMax in bot h species. The CTMax of winter caught crabs was significantly lower th an in summer or autumn caught animals, a difference that persisted irr espective of laboratory acclimation status. (C) 1998 Published by Else vier Science Ltd. All rights reserved.