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american eel

Aquatic Living Resources (1)

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Comparison of point and transect-based electrofishing to sampleAmerican eel (Anguilla rostrata) in wadeable riverinehabitats
S. M. Reid
Journal:

Aquatic Living Resources / Volume 24 / Issue 1 / January 2011

Published online by Cambridge University Press:

15 April 2011, pp. 79-83

Print publication:

January 2011
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Dramatic declines in American eel (Anguilla rostrata) recruitment haveresulted in strong conservation measures being implemented. Recovery actions in Ontariohave included stocking of glass eels. Given the financial costs and imperative toundertake effective recovery actions, post-stocking monitoring is essential. In thisstudy, point- and transect electrofishing sampling were compared in terms of eeldetection, catch rates, size-selectivity, and power to detect changes in abundance.Transect sampling was more likely to detect eels and captured over twice the number ofeels than point-sampling. Differences in catch rates and statistical power were dependenton the catch-per-unit-effort measure (i.e. sampling unit vs. time). Results support atransect-based sampling program for stocked eels in Lake Ontario tributaries.