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The phytal fauna of the SW Baltic Sea and its importance as reservoir for fish prey - Die Phytalfauna der SW-Ostsee und ihre Bedeutung als Reservoir von Fischnahrung

  • C. Dieter Zander
  • K Rupp
  • K Böhme
  • S Brix
  • K.C. Detloff
  • J Melander
  • Inga Nordhaus
  • C Schiro

Abstract

The phytal fauna of the SW Baltic was investigated at three localities of the German coast: Flensburg fjord (Kiel Bight), Dahmeshöved (Lübeck Bight) and Salzhaff (NW Mecklenburg). The samples comprised fi ve algae species (Fucus vesiculosus, Ceramium sp., Enteromorpha sp., Ectocarpus sp., Chorda sp.), two spermatophytes (Zostera marina, Zannichellia palustris) and animal aufwuchs by Mytilus edulis. Additionally, succession experiments were performed in the Mytilus and Ceramium belts of Dahmeshöved. The investigations were focused on the organisms living between the sub strate and their possible exploitation by fi sh. Therefore, the question arose what substrate is best suited to be colonized by “invertebrates”. At all three localities highest biomass was found in the Ectocarpus belt in late spring, in Ceramium, Enteromorpha and Mytilus belts in summer. The Zostera belts presented highest values in spring, whereas Fucus and Zannichellia belts attained relatively low values. Production of fi sh prey animals was highest in Enteromorpha belts followed by Ceramium and Mytilus belts. F. vesiculosus attained low values in Flensburg fjord but clearly higher values in Salzhaff. The index of settlement which expresses the utilization of the substrate by fi sh prey organisms was highest in Enteromorpha belts, followed by Ceramium, Fucus and Zostera belts from Salzhaff. At the end of succession areas biomass of Mytilus and Ceramium belts was lower than in the control areas but taxa numbers were higher. In these experiments the Mytilus belt attained slightly higher biomass values than the Ceramium belt. The Enteromorpha and Ceramium belts proved to be especially suited reservoirs for fi sh prey organisms.

Cite this activity

Zander C.D., Rupp K., Böhme K., Brix S., Detloff K.C., Melander J., Nordhaus I. and Schiro C. (2015) The phytal fauna of the SW Baltic Sea and its importance as reservoir for fish prey - Die Phytalfauna der SW-Ostsee und ihre Bedeutung als Reservoir von Fischnahrung. 15(1/2): 33-51.

Details

Date 31.07.2015
Issue 1/2
Volume 15
Pages 33-51
Open Access Closed Access
Open Access Status Closed Access
Eprints_link https://cris.leibniz-zmt.de/id/eprint/2502
Peer-Reviewed

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