TY - JOUR
T1 - Old tales in recent context
T2 - Current perspective on yellow perch recruitment in Lake Michigan
AU - Redman, Rebecca A.
AU - Czesny, Sergiusz
AU - Dettmers, John M.
AU - Weber, Michael J.
AU - Makauskas, Daniel
PY - 2011
Y1 - 2011
N2 - To evaluate factors affecting recruitment of yellow perch Perca flavescens in southwestern Lake Michigan, a Ricker stock-recruitment model was fitted to age-0 abundance estimated from a fall bottom trawl survey (1989-2007) and spawning stock biomass estimates. Models were built for all possible combinations of four external variables: spring-summer water temperature, June nearshore zooplankton density, spring abundance of alewives Alosa pseudoharengus, and an index of wind-induced transport of yellow perch larvae. Four relatively parsimonious models were deemed robust, and three external variables were represented (spring-summer water temperature, spring alewife abundance, and June zooplankton density). The Ricker stock-recruitment model with the lowest value of Akaike's information criterion (i.e., the best-supported model) included spring-summer water temperature and spring alewife abundance. The basic Ricker stock-recruitment model ranked second, followed by the Ricker model that included June zooplankton density. The fourth Rickermodel that was deemed robust included spring-summer water temperature. The four best models provided a good fit to age-0 yellow perch abundance estimates based on fall seining catches along the Illinois shoreline of Lake Michigan during 1989-2007. Our findings indicate that over the last two decades, yellow perch recruitment benefited during years associated with relatively warm water, low alewife abundance, and high zooplankton density.
AB - To evaluate factors affecting recruitment of yellow perch Perca flavescens in southwestern Lake Michigan, a Ricker stock-recruitment model was fitted to age-0 abundance estimated from a fall bottom trawl survey (1989-2007) and spawning stock biomass estimates. Models were built for all possible combinations of four external variables: spring-summer water temperature, June nearshore zooplankton density, spring abundance of alewives Alosa pseudoharengus, and an index of wind-induced transport of yellow perch larvae. Four relatively parsimonious models were deemed robust, and three external variables were represented (spring-summer water temperature, spring alewife abundance, and June zooplankton density). The Ricker stock-recruitment model with the lowest value of Akaike's information criterion (i.e., the best-supported model) included spring-summer water temperature and spring alewife abundance. The basic Ricker stock-recruitment model ranked second, followed by the Ricker model that included June zooplankton density. The fourth Rickermodel that was deemed robust included spring-summer water temperature. The four best models provided a good fit to age-0 yellow perch abundance estimates based on fall seining catches along the Illinois shoreline of Lake Michigan during 1989-2007. Our findings indicate that over the last two decades, yellow perch recruitment benefited during years associated with relatively warm water, low alewife abundance, and high zooplankton density.
KW - INHS
UR - http://www.scopus.com/inward/record.url?scp=84858279727&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858279727&partnerID=8YFLogxK
U2 - 10.1080/00028487.2011.620480
DO - 10.1080/00028487.2011.620480
M3 - Article
AN - SCOPUS:84858279727
SN - 0002-8487
VL - 140
SP - 1277
EP - 1289
JO - Transactions of the American Fisheries Society
JF - Transactions of the American Fisheries Society
IS - 5
ER -