Faculty of Fisheries, Department of Hydrobiology, Ege University, Bornova, Izmir, Turkey.
Environ Monit Assess. 2010 Dec;171(1-4):681-8. doi: 10.1007/s10661-010-1313-y. Epub 2010 Feb 3.
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.
基于捕捞的地中海地区大西洋蓝鳍金枪鱼养殖业发展迅速，但对其环境影响知之甚少。为了了解这一新领域的后果，需要进行长期监测。为此，我们在 2005 年至 2008 年期间按季节调查了位于爱琴海杰伦斯湾（Gerence Bay）的一个基于捕捞的金枪鱼养殖场对水柱的影响，在此期间，测量了水柱中的温度、盐度、pH 值、溶解氧、营养物质（亚硝酸盐、硝酸盐、氨和磷酸盐）以及叶绿素 a 和沉积物中的有机碳变量。尽管与生产期间的两个对照相比，网箱站的营养物浓度最高，但各站之间的差异没有统计学意义。对水柱中的理化参数、营养物质和叶绿素 a 以及沉积物中的有机碳进行监测，未发现养殖大西洋蓝鳍金枪鱼对其有明显影响。这可能是由于该地区水流强劲、网箱位置远离海岸、水深较大、控制投喂以及在研究区域定期存在金枪鱼养殖活动等原因造成的。
