Ruiz-Fernández A C, Páez-Osuna F
Institute of Marine Sciences and Limnology, National Autonomous University of Mexico, Mazatlán, Sinaloa.
Water Environ Res. 2004 Jan-Feb;76(1):5-14.
The influent and effluent water quality of two ponds at four aquaculture facilities (two intensive and two semiintensive growout systems) located on the Northwest coast of Mexico was monitored. Temperature, salinity, pH, dissolved oxygen, biochemical oxygen demand (self-consumption in 48 hours), total suspended solids, particulate organic material, nitrite, nitrate, ammonium, reactive and total phosphate, and chlorophyll a were analyzed every 2 weeks during two consecutive growout cycles. Changes recorded in most of these water quality variables were not strongly related to the management practices of the ponds, but rather to environmental factors. The mean percent differences between inflowing and outflowing water that were observed indicated that water used for culture returned to the natural environment depleted of nutrients (inorganic nitrogen and reactive phosphate), and it was evident that the rearing activities promoted the exportation of particulate material to the surrounding environment.
对位于墨西哥西北海岸的四个水产养殖设施（两个集约化和两个半集约化养成系统）中的两个池塘的进水和出水水质进行了监测。在两个连续的养成周期内，每两周分析一次温度、盐度、pH值、溶解氧、生化需氧量（48小时内的自耗量）、总悬浮固体、颗粒有机物质、亚硝酸盐、硝酸盐、铵、活性和总磷酸盐以及叶绿素a。在大多数这些水质变量中记录的变化与池塘的管理实践没有强烈关联，而是与环境因素有关。观察到的流入水和流出水之间的平均百分比差异表明，用于养殖的水返回自然环境时营养物质（无机氮和活性磷酸盐）已耗尽，并且很明显养殖活动促进了颗粒物质向周围环境的输出。
