Abstract
Capture-based aquaculture of Atlantic bluefin tuna in the Mediterranean has been expanding rapidly but little is known about its environmental impact. In order to understand the consequences of this new sector, long-term monitoring is needed. For this purpose, we investigated the impact of a capture-based tuna farm located in the Gerence Bay (Aegean Sea) on the water column on a seasonal basis from 2005 to 2008, where in the water column, temperature, salinity, pH, dissolved oxygen, nutrients (nitrite, nitrate, ammonium, and phosphate), and chlorophyll a, in the sediment organic carbon variables were measured. Although highest nutrient concentrations were observed at the cage station as compared to the two controls in the production period, differences were not statistically significant between stations. Monitoring of physico-chemical parameters, nutrients, and chlorophyll a in water column together with organic carbon in sediment did not show detectable impact of fattening of Atlantic bluefin tuna. This was probably caused by strong currents present in the area, location of the cages away from the coast, hence high water depth, controlled feeding, and periodic presence of tuna farming activity in the study area.
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Abo, K., & Yokoyama, H. (2007). Assimilative capacity of fish farm environments as determined by the benthic oxygen uptake rate: Studies using a numerical model. Bulletin of Fisheries Research Agency, 19, 79–87.
Aguado-Gimenez, F., & Garcia-Garcia, B. (2005). Changes in some morphometric relationships in Atlantic bluefin tuna (Thunnus thynnus thynnus Linnaeus, 1758) as a result of fattening process. Aquaculture, 249(1–4), 303–309.
Aguado-Gimenez, F., Garcia-Garcia, B., Hernandes-Lorente, M. D., & Cerezo-Valverde, J. (2006). Gross metabolic waste output estimates using a nutritional approach in Atlantic bluefin tuna (Thunnus thynnus) under intencive fattening conditions in western Mediterranean Sea. Aquaculture Research, 37, 1254–1258.
Aksu, M., & Kocataş, A. (2007). Environmental effects of the three fish farms in Izmir Bay (Aegean Sea-Turkey) on water column and sediment. Rapport du 38 e Congrés de la Commission Internationale Pour L’exploration Scientifique de la Mer Méditerranée, 38, 414.
Başaran, F., & Özden, O. (2004). The investigation of the rearing of bluefin tuna (Thunnus thynnus Linnaeus, 1758) on culture conditions. E.U. Journal of Fisheries & Aquatic Sciences, 21(3–4), 343–348.
FAO (2004). Capture-based aquaculture. The fattening of eels, groupers, tunas and yellowtails. Rome: FAO.
Fernandes, M., Angove, M., Sedawie, T., & Cheshire, A. (2007a). Dissolved nutrient release from solid wastes of southern bluefin tuna (Thunnus maccoyii, Castelnau) aquaculture. Aquaculture Research, 38, 388–397.
Fernandes, M., Lauer, P., Cheshire, A., & Angove, M. (2007b). Preliminary model of nitrogen loads from southern bluefin tuna aquaculture. Marine Pollution Bulletin, 54, 1321–1332.
Gaudette, H. E., Flight, W. R., Toner, L., & Folger, W. (1974). An inexpensive titration method for the determination of organic carbon in recent sediments. Journal of Sedimentary Petrology, 44, 249–253.
ICCAT (2009). ICCAT Record of BFT Farming Facilities. http://www.iccat.int/en/ffb.asp. Accessed 21 July 2009.
ICES (2002). Report of the working group on environmental interactions of mariculture. ICES CM 2002/F:04, Copenhagen, Denmark.
Karakassis, I., Tsapakis, M., Hatziyanni, E., et al. (2000). Impact of cage farming of fish on the seabed in three Mediterranean coastal areas. ICES Journal of Marine Science, 57, 1462–1471.
Katağan, T., Kocataş, A., Egemen, Ö., & Aksu, M. (2008). Report of monitoring of Akua-Kocaman bluefin tuna fattening farm (2007–2008). İzmir, Turkey.
Katavić, I., & Antolić, B. (1999). On the impact of a sea bass (Dicentrarchus labrax L.) cage farm on water quality and macrobenthic communities. Acta Adriatica, 40, 19–32.
Kaymakçı-Başaran, A., Aksu, M., & Egemen, Ö. (2007). Monitoring the impacts of the offshore cage fish farm on water quality located in Ildır Bay (Izmir-Aegean Sea). A.U. Journal of Agricultural Sciences, 13, 22–28 (in Turkish).
Kaymakçı-Başaran, A., Aksu, M., & Egemen, Ö. (2009). Impacts of the fish farms on the water column nutrient concentrations and accumulation of heavy metals in the sediments in the eastern Aegean Sea (Turkey). Environmental Monitoring and Assessment. doi:10.1007/s10661-009-0808-x.
Kontaş, A., Küçüksezgin, F., Altay, O., & Uluturhan, E. (2004). Monitoring of eutrophication and nutrient limitation in the Izmir Bay (Turkey) before and after Wastewater Treatment Plant. Environment International, 29, 1057–1062.
La Rosa, T., Mirto, S., Favaloro, E., Savona, B., Sarà, G., Danovaro, R., et al. (2002). Impact on the water column biogeochemistry of a Mediterranean mussel and fish farm. Water Research, 36, 713–721.
Maldonado, M., Carmona, M. C., Echeverría, Y., & Riesgo, A. (2005). The environmental impact of Mediterranean cage fish farms at semi-exposed locations: Does it need a re-assessment? Helgoland Marine Research, 59, 121–135.
Matijevic, S., Kuspilic, G., & Baric, A. (2006). Impact of a fish farm on physical and chemical properties of sediment and water column in the middle Adriatic Sea. Fresenius Environmental Bulletin, 15, 1058–1063.
Neofitou, N., & Klaudatos, S. (2008). Effect of fish farming on the water column nutrient concentration in a semi-enclosed gulf of the Eastern Mediterranean. Aquaculture Research, 39, 482–490.
Pitta, P., Apostolaki, E. T., Tsagaraki, T., Tsapakis, M., & Karakassis, I. (2006). Fish farming effects on chemical and microbial variables of the water column: A spatio-temporal study along the Mediterranean Sea. Hydrobiologia, 563, 99–108.
Pitta, P., Karakassis, I., Tsapakis, M., & Zivanovic, S. (1999). Natural vs. mariculture induced variability in nutrients and plankton in the eastern Mediterranean. Hydrobiologia, 391, 181–194.
Strickland, J. D. H., & Parsons, T. R. (1972). A practical handbook of seawater analysis. Ottowa: Fisheries Research Board of Canada.
Vezzulli, L., Moreno, M., Marin, V., Pezzati, E., Bartoli, M., & Fabiano, M. (2008). Organic waste impact of capture-based Atlantic bluefin tuna aquaculture at an exposed site in the Mediterranean Sea. Estuarine, Coastal and Shelf Science, 78, 369–384.
Vita, R., & Marin, A. (2007). Environmental impact of capture-based bluefin tuna aquaculture on benthic communities in the western Mediterranean. Aquaculture Research, 38, 331–339.
Vita, R., Marin, A., Jimenez-Brinquis, B., Cesar, A., Marin-Guirao, L., & Borredat, M. (2004). Aquaculture of Bluefin tuna in the Mediterranean: Evaluation of organic particulate wastes. Aquaculture Research, 35, 1384–1387.
Wu, R. S. S. (1995). The environmental impact of marine fish culture: Towards a sustainable future. Marine Pollution Bulletin, 31, 159–166.
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Aksu, M., Kaymakçı-Başaran, A. & Egemen, Ö. Long-term monitoring of the impact of a capture-based bluefin tuna aquaculture on water column nutrient levels in the Eastern Aegean Sea, Turkey. Environ Monit Assess 171, 681–688 (2010). https://doi.org/10.1007/s10661-010-1313-y
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DOI: https://doi.org/10.1007/s10661-010-1313-y