islandica populations differed distinctly in maximum life span (40 y in Kiel Bay to 197 y in Iceland), but less in growth performance ([phi]' ranged from 2.
Ocean quahogs, Arctica islandica were collected in 2005 and 2006 from 6 sites: the Norwegian coast, Kattegat, Kiel Bay (Baltic Sea), White Sea, German Bight (North Sea), and Iceland (off northeast Iceland; Fig.
The initial full factorial ANCOVA model of body and shell mass ln(AFDM) and ln(SDM) versus ln(shell height) and site indicated all sites differ significantly with the exceptions of the Norwegian coast and German Bight, and White Sea and Kiel Bay in AFDM, and Norwegian coast and the German Bight and the White Sea and Kattegat in SDM, respectively (Table 2).
We found growth to differ significantly between all sites except between the Norwegian coast and the German Bight and between Iceland and Kiel Bay (Fig.
This becomes clearly evident at the low-salinity sites of the White Sea and Kiel Bay, where life span is less than 50 y (compare also Brey et al.
The growth curves for Kattegat, the German Bight, and the Norwegian coast, and Iceland and Kiel Bay, albeit significantly different (Fig.
islandica from five populations: Norwegian coast, Kattegat, Kiel Bay (Baltic Sea), White Sea and German Bight (North Sea), to body mass, water temperature and site.
37 for Kiel Bay did not provide a consistent picture: clipping of either very small animals (from Kiel Bay and White Sea population) or of very large animals (from German Bight, Norway population) both increased [Q.
Population Location Salinity Depth (m) Norwegian Coast 69[degrees]9'N 33 10-30 8[degrees]57'E Kattegat 56[degrees]0'N 31 33 11[degrees]8'E White Sea 66[degrees]'N 25 10 33[degrees]38'E Kiel Bay 54[degrees]32'N 25 25 10[degrees]42'E German Bight 54[degrees]09'N 31 40 7[degrees]47'E Temperature ([degrees]C) Sample Size Population HT ET HT ET Norwegian Coast 4 9 35 23 Kattegat 8 13 29 16 White Sea 4 9 12 12 Kiel Bay 10 15 28 24 German Bight 10 15 8 10 TABLE 2.