Title

Observations of American eels using an upland passage facility and effects of passage on the population structure

Publication Date

2009

Keywords

American eel, eels, eel ladder, Hudson River, migration, local movements, recapture, productivity, barriers

Journal or Book Title

North American Journal of Fisheries Management

Abstract

Over two seasons, we observed passage of American eels (Anguilla rostrata) at an eelpassage facility (eel ladder) placed adjacent to an upland mill dam on a small tributary to theHudson River, New York. American eel use of the ladder was significantly correlated with freshetsand moon phase, similar to other studies of eel migration. Most of the migrants were young (,20cm total length). Several large American eels (.35 cm) exhibited local movements, including useof the ladder, as shown by recaptures of individuals marked with coded wire tags. Operation ofthe eel ladder greatly reduced the density of small American eels below the mill dam. Placing eelladders on upland obstructions has the potential to enhance the productivity of silver (sexuallymature) eels, an important consideration in the Hudson Valley, where hundreds of barriers havebeen constructed on upland tributaries.

Pages

715-720

Volume

29

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