Fig. 4


Download original image

Mean mass per individual fish for different trophic guilds generally increased over 35 years in the Chicago Area Waterway System, except for omnivorous species which is generally thought of as a sign of increases ecosystem quality. Lines represent significant piecewise regressions (minimum of 3-yr spans; α = 0.05). Different shapes represent groups with significantly different means (α = 0.05) within each index.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.