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Foraging behaviour changes of Arctic charr during smolt migration in northern Norway
Author(s) -
Rikardsen H.,
Amundsen P.A.,
Bodin P. J.
Publication year - 2002
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2002.tb00297.x
Subject(s) - biology , pelagic zone , arctic , benthic zone , fish migration , bosmina , predation , foraging , salvelinus , fishery , ecology , fish <actinopterygii> , zooplankton , cladocera , trout
Smolt of anadromous Arctic charr Sahelinus alpinus (L.) migrating from Storvatn, northern Norway, had a similar feeding intensity as resident Arctic charr from the benthic‐ and pelagic zone in early summer in fresh water. While smolts fed mostly on surface insects, however, resident Arctic charr had a more broader diet consisting mostly of chironomids, Bosmina sp., benthic prey and surface insects. This indicates that Arctic charr smolts have adopted a surface oriented feeding behaviour prior to their sea migration.