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Abundance and movement patterns of age-0 juvenile lake sturgeon in the Peshtigo River, Wisconsin

TitleAbundance and movement patterns of age-0 juvenile lake sturgeon in the Peshtigo River, Wisconsin
Publication TypeJournal Article
Year of Publication2009
AuthorsCaroffino, DC, M., STrent, Lindberg, MS
JournalEnvironmental Biology of Fishes
Volume86
Pagination411–422
Abstract

In Great Lakes tributaries, age-0 juvenilelake sturgeon Acipenser fulvescens use riverine nurseryhabitats during their first summer of life and migrate toadjacent lakes after a seasonal decline in watertemperature. We used mark-recapture data collectedduring this river-residency phase to monitor patterns injuvenile abundance and movement in the PeshtigoRiver, Wisconsin, during 2006 and 2007. Jolly-Seberand multistate models were used to estimate abundanceand describe the probability of movement betweenriver sections. Juvenile abundance was higher in 2007than in 2006; however, in both years, abundance at theend of the sampling season was lower than at thebeginning. Downstream movements were observedmore frequently than upstream movements, and theprobability of a downstream movement was higherthan the probability of an upstream movement. Thelower abundance later in the sampling season andpropensity for downstream movements suggeststhat some age-0 juvenile lake sturgeon may leavethe natal river before a seasonal decline in watertemperature.

DOI10.1007/s10641-009-9540-1
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