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首页> 外文期刊>African Journal of Aquatic Science >Could phosphorus concentrations increase with the development of cage culture in Lake Kariba, Zimbabwe?
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Could phosphorus concentrations increase with the development of cage culture in Lake Kariba, Zimbabwe?

机译：随着津巴布韦卡里巴湖网箱养殖的发展，磷浓度会增加吗？

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摘要

A comparison between historical and current data was done to determine whether the concentrations of total phosphorus, orthophosphate and chlorophyll a, and Secchi disc transparency, have changed in the Sanyati Basin of Lake Kariba following the commencement of cage culture of fish in 1998. Total phosphorus concentration is markedly elevated in comparison to historical offshore data, while offshore orthophosphate concentration is lower than when the lake was eutrophic. Chlorophyll a concentrations were similar to the mean value of 4 micro g l-1 reported from open water, but lower than the mean of 22 micro g l-1 reported from inshore waters. Current values of Secchi disc transparency are lower than the historical records. To date, cage aquaculture seems not to have changed the trophic status of Sanyati Basin, and any nutrient enrichment it caused may have been mitigated by nutrient losses, through both outflow at the dam and fish harvesting.CAS Registry Numbers 1406-65-1 7723-14-0
机译：对历史数据与当前数据进行了比较，以确定在1998年开始进行网箱养鱼之后，卡里巴湖Sanyati盆地的总磷，正磷酸盐和叶绿素a的浓度以及Secchi圆盘透明度是否发生了变化。总磷与历史海上数据相比，该浓度显着升高，而海上正磷酸盐的浓度低于湖泊富营养化时的浓度。叶绿素a的浓度与公开水域中报告的4微克lsup-1的平均值相似，但低于近岸水域报告的22微克sup-1的平均值。 Secchi光盘透明度的当前值低于历史记录。迄今为止，网箱养殖似乎并未改变桑亚提盆地的营养状况，其造成的任何养分富集都可能通过大坝的流出和鱼的收获而通过养分流失而得到缓解。CAS登记号：1406-65-1 7723 -14-0

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