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Session D2: River Connectivity for Fish - A Multi-Scale, Multi-Purpose Approach

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Abstract: Fragmentation of lotic river stretches by the presence of artificial barriers leads to loss of longitudinal connectivity and promotes species isolation, being deleterious of free movements of fish within a given river network. This movement impairment detracts fish species from completing their life cycle and potentiates genetic impoverishment and disappearance of populations. The present work presents techniques to define the problem by quantitatively determining the connectivity of a river network and identifying intervention priorities, but also helps to enhance connectivity by determining best-practices to increase fish negotiation of fishways. This work was carried out at multiple scales and has multiple purposes being a holistic approach to longitudinal connectivity problems in river networks. It progresses scientific knowledge and moves a step forward in terms of river network studies, improving both problem definition and solution definition.
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2015-06-22
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