The Sea Ice Fauna of Frobisher Bay, Arctic Canada
ABSTRACT. The fauna of the lower few centimetres of the sea ice in Frobisher Bay, Arctic Canada, consists mainly of meroplanktoNc Young of benthic adults and holoplanktonic representatives of generally benthic groups. The major arctic mplankton species are not included. The ice fauna comprises nemat...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.532.4677 http://pubs.aina.ucalgary.ca/arctic/Arctic38-1-23.pdf |
| Summary: | ABSTRACT. The fauna of the lower few centimetres of the sea ice in Frobisher Bay, Arctic Canada, consists mainly of meroplanktoNc Young of benthic adults and holoplanktonic representatives of generally benthic groups. The major arctic mplankton species are not included. The ice fauna comprises nematodes, harpacticoid copepods, polychaete larvae, ciliates, various benthic larvae, Young gammaridean amphipods, and others. Some species m u r in the ice as Young animals only, others in al1 stages of development. Adaptation to the ice is shown best by the copepods, some of which occur there in al1 stages from egg to adult. The most abundant ice inhabitants reach high concentrations in the ice (nematodes more than 100 OOO, Cyclopina nearly 10 000.m-2). Others appear to show only accidental presence in the ice, and are found in small numbers only, often at times when great numbers of the same species ar present in the water below the ice. Probable feeding of the ice fauna and the food Chain linking the ice flora to vertebrate predators are discussed. Key words: arctic waters, sea ice, ice fauna, food Chain, zooplankton ” &SUMI?. La faune prtsente dans les quelques centimetres inftrieurs de la glace marine de la baie de Frobisher, est constitu6e principalement de juvtniles mtroplanctoniques dont les formes adultes appartiennent au benthos et de reprtsentants holoplanctoniques de groupes gtnbralement benthi-ques. Nous n’y retrouvons point les principales eswes du zooplancton arctique. La faune de la glace comprend es nkmatodes, des copkpodes har-pacticoides, des larves de polych&tes, des cilih, difftrentes larves benthiques, des amphipodes gammarides juvtniles et bien d’autres. Certaines |
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