G• C.-P. & FEDYAKOV, V. V. (2000): Seasonal changes in the bivalve larval plankton of the White Sea. -Senckenbergiana mafit., 30 (3/6): 141-151, 5 figs., 1 tab.; Frankfurt a. M.]In 1994 and 1995 the abundance of bivalve larvae was studied in the subarctic region of Chupa Bay, White Sea. From June until October sampling was carried out in time intervals of 1-2 weeks. At each sampling date 3 parallel samples were taken at low water. For collection of the material an Apsteinnet was used (diameter ofaperture 10 cm; mesh size 125 ~tm).Among the identified 10 species and 2 genera mytilid larvae (Mytilus edulis and Modiolus modiolus combined) and Hiatella "byssifera"were the most abundant. On species level larval densities not only varied interannually to a high degree but also showed a high temporal variability with shifts of 3-4 weeks in the occurrence ofmaximum abundances between years. These results ate discussed with respect to the geographic origin of the species as well as to the seasonal pattems ofphytoplankton blooms in the White Sea.

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