Effect of stress on turbine fish passage mortality estimates


C P. Ruggles

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Canadian Technical Report of Fisheries and Aquatic Sciences. No 1905

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Proceedings of the Workshop on Fish Passage at Hydroelectric Developments

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Problems associated with fish passage (upstream and downstream) at hydroelectric developments are well known. Research has been ongoing for years but has failed to identify mitigation that. is 100% effective. Due to the controversial nature of this subject, the Science Branch of the Department of Fisheries and Oceans (Newfoundland Region) convened a 3 day workshop to examine the available and emerging technology in fish passage at hydroelectric sites. In an effort to properly address the problem, the workshop covered a variety of relevant topics including turbine technology, sampling methodologies, salmonid biology, as well as passage technology.The consensus of the participants was that hydroelectric developments and fish do not mix. The complex mixture of biotic and abiotic factors that must be taken into account in designing mitigations has precluded the general acceptance of anyone method and highlights the need to evaluate mitigations on a case-by-case basis. Proponents of hydroelectric projects should be made aware of the various forms of mitigation early in the planning stages of the hydroelectric project development.

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