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Round Goby Acoustic Telemetry in Lake Huron
Feasibility of acoustic telemetry for exploring the spatial ecology of Round Goby in Lake Huron
September 2018 - December 2020
Seasonal changes in depth-habitat use determined from bottom trawl surveys suggest that Round Goby in the Great Lakes move from nearshore areas during the summer to offshore areas during the winter. This behavior has important implications for goby interactions with native, deepwater fish species and estimation of population size, but direct observation of inshore-offshore migration by Round Goby is lacking. Low recapture rates of marked individuals make use of standard mark-recapture methods problematic for quantifying fish movement in large ecosystems like the Great Lakes. Recent miniaturization of acoustic tags has opened the door to studies focused on the movement ecology of small-bodied fish like Round Goby. Therefore, the purpose of this study was to evaluate the use of acoustic telemetry as tool for quantifying the extent and timing of inshore-offshore migration by Round Goby.