What is it about?
Most reviews of stream fish connectivity have highlighted the urgent need for standardized methods to quantify the effects of road crossings on fish movement.
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Why is it important?
We propose general barrier dispersal models to allow for asymmetry in barrier permeability and changes in movement behaviours of fish confronting a barrier. We use simulations to assess the statistical power of various mark-recapture sampling designs for quantifying barrier permeability.
Perspectives
This study highlights the importance of evaluating the detectability of barrier effects and carefully planning the sampling design of mark recapture studies before conducting costly field trials, and provides quantitative tools to help achieve these goals.
Marc Pepino
Université du Québec à Trois-Rivières
Read the Original
This page is a summary of: Assessing the detectability of road crossing effects in streams: mark-recapture sampling designs under complex fish movement behaviours, Journal of Applied Ecology, July 2016, Wiley,
DOI: 10.1111/1365-2664.12725.
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