Procedures for prioritizing the removal of fish migration barriers: A review and synthesis

Kemp, P.S. and O'Hanley, J.R. (2010) Procedures for prioritizing the removal of fish migration barriers: A review and synthesis. Fisheries Management and Ecology, 17 (4). pp. 297-322. ISSN 0969-997X. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Techniques for assessing the impact of structural barriers on fish passage and for prioritising restoration actions are reviewed. Current survey methodologies are biased towards specific structures, primarily culverts and economically significant fish. Assessment criteria are often based on swimming capabilities of upstream migrating adult salmonids, while ignoring other life-stages, non-salmonid species, downstream migration and behaviour. The development of comprehensive and centrally owned geospatial inventories of barriers is essential. The collection, maintenance and dissemination of pertinent structural and environmental data can be technically, logistically and financially challenging. Standardised procedures are needed to rapidly and cost-effectively survey large numbers of barriers over wide geographic areas. The prioritisation of barrier repair and removal projects is most often based on simple cost-benefit analysis, whereby individual barriers are scored based on a set of assessment criteria and then ranked in order of priority. The benefits of using scoring-and-ranking systems, however, are unacceptably low because they consider barriers independently, thereby ignoring the cumulative, non-additive impacts produced by multiple, spatially interconnected structures. Optimisation modelling offers a more robust approach for efficiently prioritising decision making in river restoration planning, allowing decision makers to account for key uncertainties and effectively balance multiple, possibly competing, environmental and socioeconomic goals and constraints.

Item Type: Article
Subjects: H Social Sciences > H Social Sciences (General)
Divisions: Faculties > Social Sciences > Kent Business School > Management Science
Depositing User: Jesse O'Hanley
Date Deposited: 03 Sep 2010 15:09
Last Modified: 05 Jan 2015 13:39
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