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Food and growth of age‐0 smelts, Osmerus eperlanus , in a Norwegian fjord lake
Author(s) -
Næsje T. F.,
Jonsson B.,
Klyve L.,
Sandlund O. T.
Publication year - 1987
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.1095-8649.1987.tb05738.x
Subject(s) - biology , fjord , zooplankton , crustacean , copepod , fishery , zoology , ecology , oceanography , geology
Pennate diatoms, especially Aslerionella spp. and Tabellaria fenestrata , were the most important food items for smelts in Lake Mjøsa during the first month of external feeding; rotifers and early stages of copepods were eaten occasionally. Later, during summer and autumn, crustacean zooplankton (cladocerans and copepods) were the most important food items; selected species were Polyphemus pediculus, Eudiaptomus gracilis, Limnocalanus macrurus, Heterocope appendiculata. Leplodora kindti , and Bythotrephes longimanus ; some smelts larger than 7.4 cm fed on Mysis relicta . In 1979 and 1980, mean lengths of smelts in October‐November were 4.7 cm and 7.2 cm, respectively. A difference in length increment between the two years may have resulted from summer water temperatures being higher in 1980 than in 1979.