Vertical Patterns in Lake Sturgeon (Acipenser fulvescens) Larval Drift within Two Rivers Directly Connected to Green Bay, Lake Michigan

Figure 4

Number of drifting larval lake sturgeon collected in the Menominee River in 2013 by net type. Box plots illustrate the median and interquartile ranges of the data, while the jittered grey dots show the observed larval lake sturgeon catch within each net type. Vertical nets were designed to partition drift among 7 different net sections each sampled according to water depth. D-frame nets represented “traditional” sampling gear designed to sample near the river bottom. Both net types were interspersed across the rivers’ cross section and were codeployed. Days 3, 4, and 5 were peak drift and occurred from May 30 to June 1.