Author/Authors :
Bascinar ، N.S نويسنده Central Fisheries Research Inst?tue Vali Adil Yazar Cad., No:14, Ka?üstü Beldesi, 61250 Yomra, Trabzon, Turkey , , Gozler ، A. M نويسنده Rize University, Faculty of Fisheries, 53100 Rize, Turkey , , Sahin C، C نويسنده Rize University, Faculty of Fisheries, 53100 Rize, Turkey , , Eruz ، C نويسنده -Faculty of Marine Science, Karadeniz Technical University, 61530, CamburnuTrabzon,Turkey , , Tolun ، L نويسنده TUBITAK-MRC, Earth and Marine Sciences Research Institute, P.O. Box 21, 41470 Gebze, Kocaeli, Turkey , , Agirbas ، E نويسنده Rize University, Faculty of Fisheries, 53100 Rize, Turkey , , Mantikci ، M نويسنده TUBITAK-MRC, Earth and Marine Sciences Research Institute, P.O. Box 21, 41470 Gebze, Kocaeli, Turkey , , Serdar ، S نويسنده Central Fisheries Research Inst?tue Vali Adil Yazar Cad., No:14, Kasustu Beldesi, 61250 Yomra, Trabzon, Turkey , , Verep ، B نويسنده -Faculty of Marine Science, Karadeniz Technical University, 61530, CamburnuTrabzon,Turkey ,
Abstract :
The present study was conducted to examine the impact of cage aquaculture on benthic communities in coastal areas (depth 25 to 50 m) from fish farming operations located along the southeastern Black Sea (Ordu-Per?embe, Trabzon-Yomra and Rize central). Sampling was conducted seasonally from April 2007 to 2009. Sediment samples were taken using Ekman Grab (box core- 0.04 m2). Temperature, salinity, and water velocity were periodically measured to determine influencing sedimentary organic matter in the sediment, oxygenation, and anoxic conditions. In addition, grain size of sediment, organic carbon content, and distribution of benthic communities were investigated. In order to determine benthic impact of fish farms on the region, Shannon – Wiener diversity index (H’), AMBI (AZTI Marine Biotic Index) and M-AMBI (Multivariate- Marine Biotic Index) indices were used. Results of current study showed that benthic zone ecological quality of stations with number 01, 02, 03, and 04 at Ordu-Per?embefish-farming habitat was found to be very low. In autumn 2008, there were 3 species which belonged to Capitella capitata (844 individuals/m2), Capitella sp. (133 individuals/m2), and Heteromastus filliformis (311 individuals/m2) at OP-01 station. In addition, the impact of Trabzon-Yomra fish-farming activity on benthic communities was low. The degree of exposure for Rize fish-farming area in all seasons was quite low, which was not a significant negative impact.
