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

David Mark Bailey, I. A. Johnston, L. S. Peck

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    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 Q(10) 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 Q(10)s (0-4° C) of 3.6 and 4.7, respectively. The Q(10) 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.

    Original languageEnglish
    Pages (from-to)464-469
    Number of pages5
    JournalPolar Biology
    Volume28
    DOIs
    Publication statusPublished - 2005

    Keywords

    • JUVENILE SEA SCALLOPS
    • PLACOPECTEN-MAGELLANICUS (GMELIN)
    • ASTERIAS-VULGARIS VERRILL
    • CANCER-IRRORATUS SAY
    • CONTRACTILE PROPERTIES
    • ARGOPECTEN-IRRADIANS
    • ADDUCTOR MUSCLE
    • POWER OUTPUT
    • BAY SCALLOP
    • TEMPERATURE

    Cite this

    Invertebrate muscle performance at high latitude: swimming activity in the Antarctic scallop, Adamussium colbecki. / Bailey, David Mark; Johnston, I. A.; Peck, L. S.

    In: Polar Biology, Vol. 28, 2005, p. 464-469.

    Research output: Contribution to journalArticle

    Bailey, David Mark ; Johnston, I. A. ; Peck, L. S. / Invertebrate muscle performance at high latitude: swimming activity in the Antarctic scallop, Adamussium colbecki. In: Polar Biology. 2005 ; Vol. 28. pp. 464-469.
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