A Semi-Automated Method for Monitoring Dam Passage of Upstream Migrant Yellow-Phase American Eels

Autor:	Stuart A. Welsh, Joni L. Aldinger
Rok vydání:	2014
Předmět:	Hydrology Anguilla rostrata Ecology biology West virginia Management Monitoring Policy and Law Aquatic Science biology.organism_classification Environmental science Fish Upstream (networking) Eel ladder Ecology Evolution Behavior and Systematics Automated method
Zdroj:	North American Journal of Fisheries Management. 34:702-709
ISSN:	1548-8675 0275-5947
DOI:	10.1080/02755947.2014.910580
Popis:	Fish passage facilities at dams have become an important focus of fishery management in riverine systems. Given the personnel and travel costs associated with physical monitoring programs, automated or semi-automated systems are an attractive alternative for monitoring fish passage facilities. We designed and tested a semi-automated system for eel ladder monitoring at Millville Dam on the lower Shenandoah River, West Virginia. A motion-activated eel ladder camera (ELC) photographed each yellow-phase American Eel Anguilla rostrata that passed through the ladder. Digital images (with date and time stamps) of American Eels allowed for total daily counts and measurements of eel TL using photogrammetric methods with digital imaging software. We compared physical counts of American Eels with camera-based counts; TLs obtained with a measuring board were compared with TLs derived from photogrammetric methods. Data from the ELC were consistent with data obtained by physical methods, thus supporting the sem...
Databáze:	OpenAIRE
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