Patterns of Spatial and Temporal Distribution and Their Variation in Early Life Stages of Antarctic Fish in the Antarctic Peninsula Region

摘要: Ichthyoplankton collected during six expeditions to the Antarctic Peninsula area between 1975/1976 and 1984/85 was analyzed for patterns of spatial temporal distribution interannual variability abundance. In some species, e.g., Nototheniops larseni, median numbers per 103 m3 varied mostly within one order magnitude, whereas in others, Notothenia gibberifrons, considerable fluctuation postlarval abundance observed. Unusually low N. larseni recorded season summer 1982. Larvae postlarvae myctophid Electrona antarctica showed an oceanic type distribution, larvae kempi hatched were chiefly confined slope waters. A large cyclonic gyre north Adelaide Island identified as a possible retention area. Early stages particularly icefish other commercially harvested fish, could not be sufficient quantities assess annual population size. For these, specific survey grids combined use different nets are required.