Age and productivity of the Antarctic scallop, Adamussium colbecki, in Terra Nova Bay (Ross Sea, Antarctica)

Body size, geographical distribution, and biomass make Adamussium colbecki (Smith, 1902) one of the most conspicuous bivalve species in the Antarctic. Based on samples collected in austral summer 1999/2000 in Terra Nova Bay, the annual formation of shell growth bands visible on X-ray photographs was...

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Bibliographic Details
Published in:Journal of Experimental Marine Biology and Ecology
Main Authors: HEILMAYER O, T. BREY, W. ARNTZ, CHIANTORE, MARIACHIARA, CATTANEO VIETTI, RICCARDO
Other Authors: Heilmayer, O, T., Brey, Chiantore, Mariachiara, CATTANEO VIETTI, Riccardo, W., Arntz
Format: Article in Journal/Newspaper
Language:English
Published: 2003
Subjects:
Adamussium colbecki
production
stable isotope analysis
Antarctic
The Antarctic
Austral
Ross Sea
Terra Nova Bay
Antarc*
Antarctica
Online Access:http://hdl.handle.net/11567/251590
https://doi.org/10.1016/S0022-0981(03)00020-0
Description
Summary:Body size, geographical distribution, and biomass make Adamussium colbecki (Smith, 1902) one of the most conspicuous bivalve species in the Antarctic. Based on samples collected in austral summer 1999/2000 in Terra Nova Bay, the annual formation of shell growth bands visible on X-ray photographs was verified by stable isotope analysis. A general von Bertalanffy growth function was fitted to size-at-age data of 25 individuals (Hl= 108.86 mm, K = 0.114 year 1, t0 =0.367, D= 1.284). Somatic production calculated from mass-specific growth rates was 234.6 kJ m 2 year 1. Gonadal productivity amounted to 70.92 kJ m 2 year 1. Annual somatic and gonad production-to-biomass ratios (P/B) were 0.199 and 0.052, respectively. According to its consumption and production, A. colbecki is likely to play a significant role in the trophic web of Terra Nova Bay.

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