Upper Midwest Environmental Sciences Center

Figure 3d: Estimated power to detect temporal trends in bluegill catch-per-unit effort (CPUE) in Pool 4 in all sampled strata (backwater, main channel border, wing dam, side channel strata) under current sampling intensity (approx n = 82) but estimated under a naive temporal independence assumption. Trends assumed exponential. CPUE represents mean catch per 15 minutes effort. Estimates based on design-based, across-episode annual means.

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Estimating power to detect temporal trends in LTRM metrics

Figure 3d: Estimated power to detect temporal trends in bluegill (Lepomis macrochirus) catch-per-unit effort (CPUE) in Pool 4 in all sampled strata (backwater, main channel border, wing dam, side channel strata) under the present sampling intensity (n ≈ 82) but estimated under a naive temporal independence assumption. Trends assumed exponential. The CPUE represents mean catch per 15-min effort. Estimates based on design-based, across-episode annual means.

larger scale

Figure 3a

Disclaimer: This information is provided to help better inform ongoing LTRM partner discussions. The power plots are generated from small sample sizes; all plots should be treated as approximate.

Contact: Questions or comments may be directed to Brian Gray, LTRM statistician, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, at brgray@usgs.gov.

Page Last Modified: April 17, 2018