Conceptual Model

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Four congeneric species of Calanus are found in the Arctic Ocean and its marginal seas, two expatriates (C. finmarchicus and C. marshallae) and two endemics (C. glacialis and C. hyperboreus).  For the endemic species, C. glacialis dominates on the shelves and slopes while C. hyperboreus is most important in the deeper basin regions. Both these species can reproduce and grow in the extremely cold Arctic waters. The population centers of the expatriate species occur in more southerly waters. C. finmarchicus is advected into the Barents Sea from the Norwegian Sea and into the central Arctic through Fram Strait and C. marshallae, if it does enter the Arctic, passes through Bering Strait from the northern Bering Sea. Both these species are better adapted to warmer water conditions than those found in the Arctic Ocean proper

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Last updated August 24, 2011
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