News & Updates
Understanding Mussel-Rope
Understanding Mussel-rope Part 1 Many culverts are barriers to fish due to being perched/overhanging or having fast laminar flow. In the video below, Tim demonstrates how mussel-rope can improve fish passage at perched/overhanging structures. The rope simulates...
Fish Passage Guidelines
Hi everyoneThe Fish Passage Action Team have been working on a simple one-page guide to help with the remediation of common structures causing a barrier to fish.The guide includes a link to an interactive decision tool and some helpful before & after...
Comparing Baffle Types in Round Culvert
Hi everyone, We hope you are staying safe and well. As shared a short while back, we have started using Computation Fluid Dynamics (CFD) to solidify what we already knew about culvert/weir baffles and their fish passage improvement features. CFD is a...
Mini-Hydro Intake Weir
Hi everyone Below is a photo showing modifications to a back-country mini-hydro intake weir. The original fish pass and minimum residual flow devices were not functioning. The new design successfully allows expected species, all of which are climbers - longfin eels,...
Video From OZ
Hi everyone Below is a YouTube link to a video sent to us from Greg Wallis in Australia.It shows common galaxiid/inanga (Galaxias maculatus) trying to navigate a vertical wall at a large box culvert.Despite these fish showing amazing burst-swimming abilities to scale...
Wetland habitat improvement
Following the restoration of fish passage into the Pongakawa Wetland (Bay of Plenty, NZ), the upstream habitat has been further enhanced by deploying Floating Nurseries that provide shade and refuge for aquatic and terrestrial species while also improving water quality.