| Vertical distributions and diel migration of some species of micronekton and macroplankton are given in the 0-965 m water column on a fixed station in the Ligurian Sea (Northwestern Mediterranean Sea). The hauls performed with a multiple opening/closing net system permit detailed description of the vertical distributions of eighteen species: five euphausiids, one mysid, one decapod, three fishes, three siphonophores, one hydromedusa, one pyrosomid and three pteropods. Only the euphausiid Stylocheiron longicorne and the fishes Cyclothone braueri and C. pygmaea show no migratory behavior. The other species perform migrations of more or less large amplitude: 155 m as a mean for the mysid Eucopia unguiculata until 630 m for the decapod Gennadas elegans. All... |
