Spatially intensive sampling by electrofishing for assessing longitudinal discontinuities in fish distribution in a headwater stream

Fisheries Research
By: , and 

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Abstract

Spatially intensive sampling by electrofishing is proposed as a method for quantifying spatial variation in fish assemblages at multiple scales along extensive stream sections in headwater catchments. We used this method to sample fish species at 10-m2 points spaced every 20 m throughout 5 km of a headwater stream in France. The spatially intensive sampling design provided information at a spatial resolution and extent that enabled exploration of spatial heterogeneity in fish assemblage structure and aquatic habitat at multiple scales with empirical variograms and wavelet analysis. These analyses were effective for detecting scales of periodicity, trends, and discontinuities in the distribution of species in relation to tributary junctions and obstacles to fish movement. This approach to sampling riverine fishes may be useful in fisheries research and management for evaluating stream fish responses to natural and altered habitats and for identifying sites for potential restoration.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Spatially intensive sampling by electrofishing for assessing longitudinal discontinuities in fish distribution in a headwater stream
Series title Fisheries Research
DOI 10.1016/j.fishres.2016.09.026
Volume 185
Year Published 2017
Language English
Publisher Elsevier
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 12 p.
First page 90
Last page 101