STOMACH CONTENT OF WHITEFISH, COREGONUS LAVARETUS (ACTINOPTERYGII: SALMONIFORMES: SALMONIDAE), OFF THE ALAND ISLANDS, BALTIC SEA

Henry Hägerstrand, Mikael Himberg, L Saks, A Verliin

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

1 Citeringar (Scopus)

Sammanfattning

The Aland Islands are major feeding grounds for threatened whitefish, Coregonus lavaretus (Linnaeus, 1758), in the Gulf of Bothnia, Baltic Sea. Diet of the foraging whitefish, however, has been poorly studied in this area. In the presently reported spot-check study we analysed stomach content of whitefish (n = 88), sampled by gillnets at hard bottom shallows during spring and summer (June-August) 2012. Molluscs and benthic crustaceans were the main prey items, where the rank order of abundance and biomass of food items was Theodoxus fluviatilis > Idotea spp. > Gammarus spp. > Hydrobia spp. > Mytilus trossulus > Radix spp. A shift towards T. fluviatilis was observed from June to July-August. The acquired knowledge on the diet composition could help to shed more light on the ecology of whitefish in the Baltic and may serve to indicate food web alterations due to climate variations and long-term change.
OriginalspråkOdefinierat/okänt
Sidor (från-till)71–74
Antal sidor4
TidskriftACta Ichthyologica et Piscatoria
Volym48
Nummer1
DOI
StatusPublicerad - 2018
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • stomach content
  • Aland Islands
  • prey

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