The oxygen consumption rates (standard metabolic level) of three Paluevnon adupersus populations from Fjords in the Belt Sea (Baltic) with different salinity regimes and of Palaemon elegana from the Black Sea measured under summer temperature conditions i n a flow-through respirometer are almost identical. A possible interpretation of these findings from the evolutionary standpoint and its practical importance for research into brackish water environments is briefly discussed.The author wishes to express his gratitude t o the Directors of the Marine Biological Laboratories a t Helsingprr, Denmark, and Burgas, Bulgaria, for the outstanding working conditions they provided and their hospitality. My thanks are also due to Prof. Dr. E. A. ARNDT for his critical perusal of the manuscript.
SummaryConiparison between standard metabolic rates (oxygen consumption under suniiiier temperature conditions in a flow-through respirometer with parallel recording of locomotory activity) of three geographically isolated populations of Palaenion adspersus from Fjords in the western Baltic with different salinity regimes and of P. elegans from the Black Sea reveals no major differences. Possible interpretation of these findings and its practical importance for research into brackish water environnients is briefly discussed.
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