Extended Abstract 11th International Symposium on Ecohydraulics 2016

Analysis of brook trout spatial behaviour during passage attempts in corrugated culverts using near-infrared illumination video imagery (26685)

Normand E Bergeron 1 , Pierre-Marc Constantin 1 , Elsa Goerig 1 , Theodore Castro-Santos 2
  1. Eau Terre et Environnement, INRS, Qu├ębec, QC, Canada
  2. S.O. Conte Anadromous Fish Research Center, USGS, Turner Falls, MA, USA

W e used video recording and near - infrared illumination to document the spatial behavior of brook trout of various sizes attempting to pass corrugated culvert s under differen t hydraulic conditions. Semi - automated image analysis was used to digitize fish position at high temporal resolution inside the culvert, which allowed calculati o n of various spatial behavior metrics, including instantaneous ground and swimming speed, path complexity, distance from side walls, velocity preference ratio ( mean velocity at fish lateral position/mean cross - sectional velocity) as well as number and duration of stops in forward progression. The presentation summarize s the main results and discuss e s how they could be used to improve fish passage performance in culverts.

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