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Pollution of surface sediments by cage culture in Duanwan Bay Date:2015-10-31 09:16
Offshore cage culture has been rapidly developed due to the increase in fish consumption11, but at the same time, the contradiction between this highly intensive artificial breeding ecosystem and the environment has become increasingly prominent, and it has also drawn increasing attention. 41. Sediments are an important component of the cage aquaculture ecosystem and are closely related to the characteristics of the overlying aquaculture waters. They are used to evaluate the content, distribution and migration of various pollutants in the sediments and to evaluate the entire aquaculture ecosystem. The formulation of pollution prevention measures has important implications. In view of this, from April 2002 to January 2003, four quarters of investigations were conducted on the contamination status of surface sediments in Dulong Bay, which has been used for more than 20 years in cage culture, and the effects of cage culture on sediments were compared. Many scholars have previously conducted research on different sea areas and obtained similar results to this study. Karakassis et al. (151) found that the CN content in sediments in the offshore cage culture area of ​​the Mediterranean Sea is 15 times 5 times higher than that in the control area, and the content of P is more than 4 times higher; Haigrave et al. 161 also found similar conditions in the offshore Atlantic Ocean; Holner et al. 171 found that The content of C in the offshore cage aquaculture area of ​​the Philippines is up to 5% or more, and the content of N is between 3, which is obviously more than 2 times higher than the control sea area. Dumbbell Bay is located in the northwestern part of Daya Bay, Guangdong Province, approximately 114o30' - close date: 0050302 Revised Date Zhong Rusong Editing Fund Project: National Natural Science Foundation of China (4(1) 71074) 114*34'E, 22*39l22*43'N It is a semi-enclosed cove, facing Dapeng Peninsula to the south, Aotou Town and Huizhou Port to the north, and Bayoukou to the east to directly connect the waters of Daya Bay. The bay is 121m long from east to west and 7km wide from north to south. The water area is 5010i. 05) But in April and July, the difference in the sulfide content was significant (P
Offshore cage culture has been rapidly developed due to the increase in fish consumption11, but at the same time, the contradiction between this highly intensive artificial breeding ecosystem and the environment has become increasingly prominent, and it has also drawn increasing attention. 41. Sediments are an important component of the cage aquaculture ecosystem and are closely related to the characteristics of the overlying aquaculture waters. They are used to evaluate the content, distribution and migration of various pollutants in the sediments and to evaluate the entire aquaculture ecosystem. The formulation of pollution prevention measures has important implications. In view of this, from April 2002 to January 2003, four quarters of investigations were conducted on the contamination status of surface sediments in Dulong Bay, which has been used for more than 20 years in cage culture, and the effects of cage culture on sediments were compared. Many scholars have previously conducted research on different sea areas and obtained similar results to this study. Karakassis et al. (151) found that the CN content in sediments in the offshore cage culture area of ​​the Mediterranean Sea is 15 times 5 times higher than that in the control area, and the content of P is more than 4 times higher; Haigrave et al. 161 also found similar conditions in the offshore Atlantic Ocean; Holner et al. 171 found that The content of C in the offshore cage aquaculture area of ​​the Philippines is up to 5% or more, and the content of N is between 3, which is obviously more than 2 times higher than the control sea area. Dumbbell Bay is located in the northwestern part of Daya Bay, Guangdong Province, approximately 114o30' - close date: 0050302 Revised Date Zhong Rusong Editing Fund Project: National Natural Science Foundation of China (4(1) 71074) 114*34'E, 22*39l22*43'N It is a semi-enclosed cove, facing Dapeng Peninsula to the south, Aotou Town and Huizhou Port to the north, and Bayoukou to the east to directly connect the waters of Daya Bay. The bay is 121m long from east to west and 7km wide from north to south. The water area is 5010i. 05) But in April and July, the difference in the sulfide content was significant (P
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