Quantitative investigations of the Baltic Fucus belt macrofauna

摘要: Abstract A remote operating device for obtaining quantitative samples of bushy algae is described. An algal plant, fixed in the middle a collapsible cage used as natural trap. Lines from sea surface ensure rapid enclosure alga which after week's exposure has received fauna. The worked quite satisfactorily period more than two years continuous with monthly sampling Baltic annual maximum animals around 600 specimens per 100 g dry Fucus occurs November, dominated by crustaceans Idatea and Gammarus molluscs Hydrobia, Theadaxus Cardium. minimum January specimens. frequent shown that especially invade initially empty plant very rapidly.