College of Economics & Management, Anhui Agricultural University, Hefei 230036, China.
College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China.
Int J Environ Res Public Health. 2022 Jul 4;19(13):8177. doi: 10.3390/ijerph19138177.
The carrying capacity of fish is related to the sustainability of fisheries' activities in water bodies. The fish carrying capacity of a water body is the maximum fish yield that can be carried by the natural bait organisms in the water body under the ideal natural conditions without feeding and fertilization. The evaluation of fish productivity is an important basis for rational stocking, rational fishing, and the scientific utilization of natural bait resources in a water area. This paper adopts the background data of the Shengjin Lake fishery ecosystem and uses the bait-based estimation method. The results show that (1) the annual yield of silver carp fed on phytoplankton is 1.5 million kg; (2) the annual yield of bighead carp fed on zooplankton is 1.295 million kg; (3) the annual yield of benthos is 310,000 kg; (4) the annual yield of organic detritus is 280,000 kg; and (5) as the coverage of water grass in Shengjin Lake is less than 10%, it should be protected and restored rather than used by fish. In general, the annual maximum carrying capacity of fish in Shengjin Lake is 3.385 million kg, except for water and grass.
鱼类的承载量与水体中渔业活动的可持续性有关。水体的鱼类承载量是指在理想的自然条件下，不投饵和施肥，水体中的天然饵料生物所能承载的最大鱼类产量。鱼类生产力的评估是合理放养、合理捕捞和科学利用水域天然饵料资源的重要依据。本文采用盛金湖水生生态系统背景数据，采用基于饵料的估算方法。结果表明：（1）滤食性浮游植物的银鱼年产量为 150 万公斤；（2）以浮游动物为食的鳙鱼年产量为 129.5 万公斤；（3）底栖生物的年产量为 31 万公斤；（4）有机碎屑的年产量为 28 万公斤；（5）由于盛金湖的水草覆盖率低于 10%，因此应该对其加以保护和恢复，而不是供鱼类利用。总的来说，除了水和草，盛金湖鱼类的年最大承载量为 338.5 万公斤。
