In this section
- History of Lake Apopka
- Lake Apopka Marsh Flow-Way
- Lake Apopka North Shore
- Gizzard shad harvesting at Lake Apopka
- Continuous sensor-based water quality data
- Map of the regions (flood control areas) where water control structures operated by the district are designed to reduce flood impacts
Lake Apopka shad harvesting
- Setting Water Quality Goals for Restoration of Lake Apopka: Inferring Past Conditions (technical report)
- Total Maximum Daily Load for Total Phosphorus for Lake Apopka, Lake and Orange Counties, Florida (technical report)
- Florida Fish and Wildlife Conservation Commission aquatic plant management strategy for Lake Apopka
Harvesting gizzard shad from Lake Apopka
Harvesting gizzard shad from Lake Apopka removes the nutrients (phosphorus and nitrogen) contained in the fish bodies and reduces the internal recycling of these nutrients within the lake. This improves water clarity by reducing the severity of algal blooms, which depend on phosphorus for growth.
In other lakes, restoration strategies that include shad harvesting have resulted in an improved food web, reduced algal blooms, improved water clarity, expansion of vegetated habitat and improved game fish populations. This harvesting procedure, in conjunction with reduction of nutrients entering the lake and removal of in-lake nutrients by filtration marshes, is producing similar results in Lake Apopka.
Between 1990 and December 2014, gizzard shad harvesting has removed 21.5 million pounds of these fish from the lake. This equates to removing 151,046 pounds of phosphorus and 452,845 pounds of nitrogen removed from the lake.
Updated on 2-12-2015