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A Comparison of Methods to Estimate Shovelnose Sturgeon Mortality in the Mississippi River Adjacent to Missouri and Illinois


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The authors examined three methods to evaluate Shovelnose Sturgeon, Scaphirhynchus platorynchus, mortality. Mortality is a key parameter in understanding the dynamics of any fish population. The Mississippi River was sampled in two distinct but connected geomorphic sections: upper Mississippi River and the middle Mississippi River. The three methods (e.g., ratio of first year recruits to all recruits [Heincke’s method], a linearized weighted catch curve, and an open system mark–recapture mortality approach) provided varying results, and our data indicated that a single method to estimate Shovlenose Sturgeon mortality rate may not be appropriate. As such, biologists must recognize that disparities in Shovelnose Sturgeon mortality [...]



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North American Journal of Fisheries Management, 33:4, 754-761, DOI: 10.1080/02755947.2013.808291. Partially funded by the U.S. Army Corps of Engineers' Upper Mississippi River Restoration-Environmental Management Program.

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