Hicks, Brendan J.Roper, M.R.Ito, TBoubée, J. A. T.Campbell, David I.2024-08-082024-08-082008Hicks, B. J., Roper, M. R., Ito, T., Boubée, J. A., & Campbell, D. I. (2008). Passage of inanga (Galaxias maculatus) over artificial ramps as a means of restoring upstream access to stream habitat. Centre for Biodiversity and Ecology Research, School of Science & Engineering, University of Waikato.https://hdl.handle.net/10289/16754The effects of substrate type, flow rate, and slope on fish passage over artificial ramps was evaluated for inanga (Galaxias maculatus); a small diadromous fish native to New Zealand, Australia, Tasmania, Lord Howe Island, Chatham Island, Chile, Argentina, and the Falkland Islands. Five substrate types (smooth, corrugated, herring-bone baffle, and two plastic moulded cores of ground drainage products Polyfo® and Stripdrain®) were tested on slopes of 3 - 5 % and flows of 4 - 6 ls-1. Slope, fish size, and substrate type each had a significant influence on the mean distances swum. Stripdrain® was the most effective substrate type, enabling the greatest distances to be achieved and a maximum vertical elevation of 0.39 m to be attained. The results of this study have further highlighted the potential for ramps to provide fish passage past small in-stream barriers, as well as the need to refine ramp slopes and lengths in order to meet the specific barrier remediation needs.enReport