Preliminary studies on the vertical distribution of size-fractions in the zooplankton community in Lindåspollene, western Norway

摘要: Zooplankton collected with Clarke-Bumpus plankton samplers equipped 180 µm mesh-size nets in 10 m depth-strata and 2–3 hours time intervals Lindaspollene October 1979 12–13 May 1981 revealed distinct differences regard to the vertical distribution of size-fractions plankton. Thus, major part biomass > 1000 size-fraction was concentrated deepest 20 throughout sampling period, but a smaller size-fraction, composed particularly Sagitta elegans Aglantha digitale, performed migrations. In same upper m, no diel migration could be ascertained. However, species S. A. digitale displayed migrations similar those observed 1979. The 180–500µm 500–1000 1979, weak v...