Oithona similis harpacticoid nauplius
Harpacticoid

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Sea Ice Copepods

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Copepods are among the most common invertebrates in Arctic sea ice. All three major groups (Calanoida, Cyclopoida, Harpacticoida) are found with Arctic sea ice.

The cyclopoid copepods Cyclopina gracilis and C. schneideri, as well as the harpacticoids Harpacticus spp., Halectinosoma sp. and Tisbe furcata, are common in sea ice samples. These species are adpted ot living on substrates and can befound on the ice surface and within its channels. They are major grazers on the ice algae as well as the protists associated with it.

Typically pelagic species can also be found close to the ice or within channels such as the calanoid species Acartia longiremis, Pseudocalanus sp., and Calanus glacialis. Due in part to their high numbers within the pelagic realm, the cyclopoid Oithona similis, occasionally reaches noteworthy densities in coastal fast ice. Copepod nauplii of both pelagic and benthic species can also be found in high numbers associated with the ice.

 

Page Author: Bodil Bluhm & Russ Hopcroft
Created: Feb 10, 2009

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