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Low Apparent Survival And Heterogeneous Movement Patterns Of Invasive Blue Catfish In A Coastal River, Troy D. Tuckey, Mary C. Fabrizio, Aj Norris, M Groves
Low Apparent Survival And Heterogeneous Movement Patterns Of Invasive Blue Catfish In A Coastal River, Troy D. Tuckey, Mary C. Fabrizio, Aj Norris, M Groves
VIMS Articles
Blue Catfish Ictalurus furcatus were purposefully introduced into freshwater tributaries to Chesapeake Bay in the past, and populations have subsequently spread to new areas, negatively impacting native communities and causing concern for resource managers. To aid development of management strategies, we implemented a multiyear (2012-2015) tagging study of invasive Blue Catfish in a 40-km stretch of the Potomac River to estimate survival and assess movement patterns. Blue Catfish (N = 1,237) were captured by electrofishing and double-tagged to allow us to estimate tag retention rates; we used reward tags to increase reporting rates. Recaptured fish (N = 104; 8.4% return …