Invertebrate muscle performance at high latitude: swimming activity in the Antarctic scallop, Adamussium colbecki.

Bailey, D.M. , Johnstone, I.A. and Peck, L.S. (2005) Invertebrate muscle performance at high latitude: swimming activity in the Antarctic scallop, Adamussium colbecki. Polar Biology, 28(6), pp. 464-469. (doi:10.1007/s00300-004-0699-9)

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Publisher's URL: http://dx.doi.org/10.1007/s00300-004-0699-9

Abstract

The escape swimming performance of the Antarctic scallop, Adamussium colbecki, was measured in animals acclimated for 6 weeks to –1, 0 or 2°C and tested at –1.5 to +1.5°C. Clap duration and swimming velocity were significantly related to temperature, but were not affected by acclimation, demonstrating no phenotypic plasticity. Comparisons of the mean swimming velocity of A. colbecki with the published data for temperate and tropical species showed little evidence for evolutionary compensation for temperature, with all data fitting to a single exponential relationship with a Q10 of 2.08 (0–20°C). The contraction kinetics of the isolated fast adductor muscle of A. colbecki were determined and the times to 50% peak tension and 50% relaxation had Q10s (0–4°C) of 3.6 and 4.7, respectively. The Q10 of the overall relationship for pooled time to peak twitch data for four scallop species was 2.05 (0–20°C). Field studies revealed low mobility and poor escape performance in wild A. colbecki. A combination of thermodynamic constraints, reduced food supply, and lower selective pressure probably explains the low levels of swimming performance seen in A. colbecki.

Item Type:Articles
Additional Information:The original publication is available at www.springerlink.com
Keywords:JUVENILE SEA SCALLOPS; PLACOPECTEN-MAGELLANICUS (GMELIN); ASTERIAS-VULGARIS VERRILL; CANCER-IRRORATUS SAY; CONTRACTILE PROPERTIES; ARGOPECTEN-IRRADIANS; ADDUCTOR MUSCLE; POWER OUTPUT; BAY SCALLOP; TEMPERATURE
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bailey, Dr David
Authors: Bailey, D.M., Johnstone, I.A., and Peck, L.S.
Subjects:Q Science > QL Zoology
Q Science > QP Physiology
College/School:College of Medical Veterinary and Life Sciences
Journal Name:Polar Biology
ISSN:0722-4060
ISSN (Online):1432-2056
Copyright Holders:Copyright © 2005 Springer
First Published:First published in Polar Biology 28(6):464-469
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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