DISTRIBUTION AND THE ROLE OF HYDROBIIDAE ON THE MIDDLE POMERANIAN (DARŁOWO-WŁADYSŁAWOWO)
Journal Title: Baltic Coastal Zone - Year 2006, Vol 10, Issue 1
Abstract
A population of Hydrobia sp. (Hydrobia ulvae Pennant and Hydrobia ventrosa Montagu) was studied in the Polish coastal zone (up to 3 nautical miles) of the Baltic Sea within the open coast of Polish Middle Pomerania. Abundance, wet biomass, and the frequency of Hydrobia were determined in the coastal waters, including estuaries of the Wieprza, Słupia, Łupawa, Łeba rivers and open coastal in the vicinity of Czołpino (Słowinski National Park) and Władysławowo. The frequency (F) of Hydrobia in the open coast of the Middle Pomerania amounted to 39%, while in the coastal zone of the open sea (Czołpino and Władysławowo) there were no snails. The abundance of Hydrobiidae, in the coastal zone surveyed, ranged from 0 to 398 specimens per m-2 of the bottom ( x = 33.7 spec. m[sup]–2[/sup]). Wet biomass of this bivalve ranged from 0 to 12.0 g[sub]ww[/sub] m-2 ( x = 1.0 g[sub]ww[/sub] m[sup]-2[/sup]). Apparently Hydrobia sp. has found better conditions for living and development in the estuary Middle Pomerania coast compared to open coastal. The abundance of this gastropods in the estuary zone was 27-fold higher than in the open coast and the wet weight was about 1.5-fold higher, respectively. Hydrobiidae plays an important role in the monitoring of benthos of the Baltic Sea, not constitutes a distinct food base of animals (fish and other hydrobionts).
Authors and Affiliations
Krystian Obolewski, Zbigniew Piesik
Keywords
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