Estimating run size of anadromous fishes (Roanoke River) Graduate Research Assistant: Mike Waine The objective of this study is to estimate run size for the different anadromous species migrating up the Roanoke River to spawn. Research techniques include the use of a split-beam echosounder and a DIDSON multi-beam sonar. DIDSON video clip: Clip from March 2008, with DIDSON oriented cross-channel from shallow water. How many species can you identify?

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