Polycyclic aromatic hydrocarbons (PAHs) in the mariculture zones of China’s northern Yellow Sea     

Humin Zong  Xindong MaGuangshui Na  Chuanlin HuoXiutang Yuan  Zhifeng Zhang 《Marine pollution bulletin》2014

Polycyclic aromatic hydrocarbons (PAHs) were detected in water and sediment samples collected from three mariculture zones in China’s northern Yellow Sea. In these samples, total PAH concentrations ranged from 110.8 ng/L to 997.2 ng/L and 142.2 ng/g dry weight (dw) to 750.2 ng/g dw, respectively. The log K_OC values of the various PAH compounds examined in this study increased with the log K_OW values, which is consistent with the prediction regarding PAH behavior in the environment. However, these K_OC values were lower than the predicted values as a result of the effects of organic matters, which were abundant in the mariculture water. The isomeric ratios of the PAHs in sediment indicated that the source of the PAHs in the mariculture zones were mainly pyrolytic. The TEQ^carc values of PAHs ranged from 7 ng TEQ/g dw to 92 ng TEQ/g dw, and only a few samples met the safe criterion with respect to individual PAH concentrations.  相似文献   

Molecular characterizations of chloramphenicol- and oxytetracycline-resistant bacteria and resistance genes in mariculture waters of China   总被引：1，自引：0，他引：1  

Hongyue Dang  Jingyi Zhao  Mingna Chen 《Marine pollution bulletin》2009,58(7):987-994

In order to gain an understanding of the diversity and distribution of antimicrobial-resistant bacteria and their resistance genes in maricultural environments, multidrug-resistant bacteria were screened for the rearing waters from a mariculture farm of China. Both abalone Haliotis discushannai and turbot Scophthalmus maximus rearing waters were populated with abundant chloramphenicol-resistant bacteria. These bacteria were also multidrug resistant, with Vibriosplendidus and Vibriotasmaniensis being the most predominant species. The chloramphenicol-resistance gene cat II, cat IV or floR could be detected in most of the multidrug-resistant isolates, and the oxytetracycline-resistance gene tet(B), tet(D), tet(E) or tet(M) could also be detected for most of the isolates. Coexistence of chloramphenicol- and oxytetracycline-resistance genes partially explains the molecular mechanism of multidrug resistance in the studied maricultural environments. Comparative studies with different antimicrobial agents as the starting isolation reagents may help detect a wider diversity of the antimicrobial-resistant bacteria and their resistance genes.  相似文献   

Perceived concerns and possible management strategies for governing ‘wind farm–mariculture integration’     

Tanja Michler-Cieluch  Gesche Krause   《Marine Policy》2008,32(6):1013-1022

In offshore waters of the German North Sea multiple stakeholder activity is increasing in both type and intensity. Newcomers such as wind farms make for additional claims and exclude, due to current legal constraints, other sectors, such as traditional fisheries. In this context, integrating marine aquaculture with designated wind farm areas might provide chances to combine two industries in the frame of a multiple-use concept. This paper takes up concerns and possible management framework requirements as expressed through interviews with the wind farm industry and the mussel harvesting sector when inquiring about such a multiple-use setting. The article closes with a discussion on two co-management strategies that might be appropriate for governing potential interacting wind farm–mariculture activities.  相似文献   

基于地理探测器的我国海水养殖产量的影响因素分析          下载免费PDF全文

闫春霞  沈欣 《海洋开发与管理》2022,39(2):65-71

为促进我国海洋养殖业的可持续发展,文章基于我国海水养殖产量的统计数据,选取19个影响因子,利用地理探测器方法实证分析我国海水养殖产量和主要海水养殖品种产量的影响因素,并提出发展建议。研究结果表明:我国鱼类海水养殖产量主要分布在广东和福建,甲壳类海水养殖产量主要分布在广东,贝类海水养殖产量主要分布在山东和福建,藻类海水养殖产量主要分布在福建;我国海水养殖产量的主要影响因素为市场需求、技术推广和设备,鱼类和甲壳类海水养殖产量的共同主要影响因素为技术推广、科技创新和经济,贝类和藻类海水养殖产量的共同主要影响因素为市场需求和技术推广;相关沿海地区应高度重视科学技术的作用,提高海水养殖产品的附加值和竞争力,并进一步开发利用其生态价值。  相似文献   

海水养殖智能投饵装备研究进展          下载免费PDF全文

纠手才  张效莉 《海洋开发与管理》2018,35(1):21-27

海水养殖装备智能化发展是提高渔业生产率,实现渔业现代化的重要途径。文章着重介绍了国外海水养殖智能投饵装备前沿研究,对比分析了国内海水养殖智能投饵装备研究现状,发现国内在海水养殖智能投饵装备研究过程中出现了养殖投饵配套设备研究相对滞后,已研发的投饵装备智能化程度低,新型智能化投饵装备的研发理念和设计技术落后、研发与市场需求脱节的问题。针对出现的问题,文章提出了加强海水养殖投饵配套设施的研发力度,开发投饵控制软件和养殖管理系统,研制智能化水平高、与养殖户需求相匹配与的投饵装备的建议,为今后我国海水养殖智能投饵装备的研究方向提供参考价值。  相似文献   

胶州湾东北部养殖海域夏季营养盐分布特征及其对浮游植物生长的影响   总被引：1，自引：0，他引：1  

宋秀贤  俞志明 《海洋与湖沼》2007,38(5):446-452

以2000年夏季胶州湾东北部养殖海域(女姑山)的现场调查为基础,结合前3年的调查结果和相关的历史资料,对该海域夏季营养盐含量分布特征及其对浮游植物生长的可能限制因子进行了分析和探讨。研究结果表明,胶州湾东北部典型养殖海域夏季表层水体各种营养盐含量高于胶州湾全湾夏季及全年的平均值,铵氮是总溶解态无机氮的主要组成形态,硝态氮次之。该海域的环境因素适宜浮游植物的生长,相关分析显示:叶绿素a与pH及DO呈显著正相关,与PO4、SiO3、NH4、DIN呈负相关。通过分析营养盐对浮游植物生长的限制因素发现,该海域各种营养盐含量相对较高,无机氮不会成为浮游植物生长的限制因素,磷酸盐有限制的可能性,而浮游植物生长受控于硅酸盐的几率最大。  相似文献