and Vanishing Lakes
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Ethical Angling |
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Ethical Angling Most recently, the National Marine Fisheries Service adopted an
Angler's Code of Ethics that is worth reviewing. Here are the nine
points that they stress:
Vanishing Lakes Lake Jackson (Leon County) is a 4,000-acre sink hole lake. This lake, like many of Florida 7,710 named lakes, sits atop a limestone aquifer. When droughts lower the subsurface water level in the aquifer, the weight of the surface water on the limestone can cause a sink to open, draining the lake as if a bath tub drain was opened. In Lake Jackson's case, this typically happens about once every 25 years, but the lake went dry about 7 years ahead of schedule this time. This natural phenomenon actually is very beneficial to the lake's aquatic ecosystem. Periodic drying of these vanishing or sink-hole lakes serves the same healthy function as the drought-flood cycle does for rivers and lakes associated with them. It allows some of the accumulated muck to be flushed from the system and the remainder can dry out and consolidate. This firms up the bottom sediments allowing rooted aquatic plants to take hold and grow once the water is restored to the river or lake. Moreover, when water comes back the decaying organic matter forms a rich cornucopia for zooplankton (microscopic animals that drift around in the water column) and macroinvertebrates (larger insects which are associated with vegetation and bottom substrates). These tiny animals in turn become food for small fish that are prey to larger predatory fish like speckled perch and bass. The end result is a healthy dynamic fishery with very strong year classes of fish. Lake drawdowns are management efforts to gain these same benefits in lakes whose water levels are artificially stabilized by dams. Many Florida lakes have benefitted from this important management tool and more are slated for restoration in the near future.
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First ran in Fish&Game Finder Magazine; October 1999

