Environmental Biology of Fishes

, Volume 23, Issue 3, pp 183–195

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

Authors

  • Odd Terje Sandlund
    • Norwegian Society for Rural Development
  • Hilmar J. Malmquist
    • Freshwater Biological LaboratoryUniversity of Copenhagen
  • Bror Jonsson
    • Directorate for Nature Management, Fish Research Division
  • Skúli Skúlason
    • Institute of BiologyUniversity of Iceland
  • Sigurdur S. Snorrason
    • Institute of BiologyUniversity of Iceland
  • Pétur M. Jónasson
    • Freshwater Biological LaboratoryUniversity of Copenhagen
  • Rolf Gydemo
    • Institute of Freshwater Research
  • Torfinn Lindem
    • Institute of PhysicsUniversity of Oslo
Article

DOI: 10.1007/BF00004909

Cite this article as:
Sandlund, O.T., Malmquist, H.J., Jonsson, B. et al. Environ Biol Fish (1988) 23: 183. doi:10.1007/BF00004909

Synopsis

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

Copyright information

© Kluwer Academic Publishers 1988