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Fish Barriers in Small Streams: A Bayesian Network Model for Evaluating Likelihood of Fish Passage Success at Culverts

Author(s): Paul Franklin; Martin Wilkes; Cindy Baker; Callum Brown

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Abstract: Fragmentation of small stream networks by instream infrastructure disrupts the natural movements of organisms that are essential for sustaining the integrity and resilience of aquatic communities. Cost-effective means for rapidly assessing fish passage at instream structures are required to optimize management of connectivity in small stream networks. A Bayesian network model incorporating empirical data and expert knowledge is developed to predict the likelihood of fish passage success at culverts for multi-species fish assemblages in New Zealand where empirical data on fish movement capabilities are limited.

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Year: 2018

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