Environmental Biology of Fishes

, Volume 23, Issue 3, pp 183–195 | Cite as

Density, length distribution, and diet of age-0 arctic charrSalvelinus alpinus in the surf zone of Thingvallavatn, Iceland

  • Odd Terje Sandlund
  • Hilmar J. Malmquist
  • Bror Jonsson
  • Skúli Skúlason
  • Sigurdur S. Snorrason
  • Pétur M. Jónasson
  • Rolf Gydemo
  • Torfinn Lindem


Population densities of age-0 arctic chaff in the surf zone averaged 1.83 and 4.70 fish m-2 in August 1984 and June 1985, respectively. Length variation of the littoral fish was low in early summer, increasing in late summer and autumn. Newly emerged charr, ∼ 20 mm long, appeared in the stony shallow water zone during both May and June. From length variation and variation in mouth position of the young charr, it is concluded that at least two of the four chaff morphs in the lake are present in the surf zone during spring and summer. In August, some of the larger age-0 charr had moved out from the surf zone, into the pelagic and the deeper epibenthic waters. The food of young littoral charr was dominated by large chironomid larvae (instar 3 and 4) and pupae

Key words

Habitat Chironomidae Charr morphs Start food Fishes Salmonids 


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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Odd Terje Sandlund
    • 1
  • Hilmar J. Malmquist
    • 2
  • Bror Jonsson
    • 3
  • Skúli Skúlason
    • 4
  • Sigurdur S. Snorrason
    • 4
  • Pétur M. Jónasson
    • 2
  • Rolf Gydemo
    • 5
  • Torfinn Lindem
    • 6
  1. 1.Norwegian Society for Rural DevelopmentSkjettenNorway
  2. 2.Freshwater Biological LaboratoryUniversity of CopenhagenHelsingørsgade 51Denmark
  3. 3.Directorate for Nature Management, Fish Research DivisionTungasletta 2Norway
  4. 4.Institute of BiologyUniversity of IcelandGrensásvegur 12Iceland
  5. 5.Institute of Freshwater ResearchDrottningholmSweden
  6. 6.Institute of PhysicsUniversity of OsloBlindernNorway

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