Alien species of spionid polychaetes (Streblospio gynobranchiata and Polydora cornuta) in Izmir Bay, eastern Mediterranean
Çinar, M.E.; Ergen, Z.; Dagli, E.; Petersen, M.E. (2005). Alien species of spionid polychaetes (Streblospio gynobranchiata and Polydora cornuta) in Izmir Bay, eastern Mediterranean. J. Mar. Biol. Ass. U.K. 85(4): 821-827
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769, meer
The present study reports the occurrence of two exotic species of polychaetes in Izmir Bay, the eastern Mediterranean: Streblospiogynobranchiata, newly reported for the Mediterranean, and Polydoracornuta. Their establishment in the area is most probably transport by ballast water since these two species greatly dominated polluted muddy bottoms near and in Alsancak Harbour. The maximum density and biomass of S.gynobranchiata in the area were 34,270 ind m[minus sign]2 and 9·4 g wwt m[minus sign]2, and those of P.cornuta were 3170 ind m[minus sign]2 and 2·1 g wwt m[minus sign]2, respectively. These two species accounted for more than 60% of total faunal populations in the majority of samples collected in winter. Both species are capable of reproducing in the area both in summer and winter. The morphological, ecological and distributional characteristics of these species as well as their impacts on the prevailing ecosystem are analysed and discussed.
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