Long-term variability of peak egg abundance timing of Baltic cod in ichthyoplankton of the southern Baltic Sea

No abstracts are to be cited without prior reference to the author.

In contrast to the most of Atlantic cod populations the eastern Baltic cod is characterized by a prolonged spawning timing. In the Baltic the cod reproduction can be successful only under salinity not less than11psu and oxygen content not less than 2 ml/l (CORE 1997). The goal of this study is revealing possible influence of some environment factors upon the variability of cod spawning timing in the Gdansk Deep.