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Lake turnover oxygen1/23/2024 ![]() ![]() It also provides a food source for small forage species such as bluegill, threadfin shad, golden shiners and others. This bloom of phytoplankton, often fueled by fertilization, produces high rates of dissolved oxygen as a by-product of photosynthesis. A diffuser aeration system will also increase fish production, amplify growth rates and decrease the growth of invasive aquatic vegetation. Before any aeration you can see that the water has become stratified and divides into columns, significantly reducing the area available for fish habitat and stressing the fish.Īeration combines the water columns, significantly increasing the area available to the fish. ![]() The top five to six feet of the water is a very productive layer, high in dissolved oxygen and phytoplankton. What Causes a Pond to Turnover?Īs water begins to heat up during late spring and early summer, the water column in ponds becomes stratified into two very distinct layers. Lastly, we will explore options that pond owners have to mitigate the consequences of these destructive events. While there are several causes of fish mortality, one common cause of large-scale kills in sport fish ponds is caused by an event known as “turnover.” While many of us have heard this term used casually in conjunction with fish kills, I would like to thoroughly examine the process and causes of turnover. Everything seems to be going smoothly, and then you arrive to the pond one day to find hundreds of dead fish floating on the surface and countless others gulping for air. By implementing management practices such as liming, fertilizing, stocking, supplemental feeding and bass harvest, the quality of the population has grown by leaps and bounds. You have spent the last several years carefully cultivating an exceptional fishery within your pond. How Pond Aeration Systems Can Prevent Pond Turnover Roger Burge | Originally published in GameKeepers: Farming for Wildlife Magazine.
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