Multibeam sonar (DIDSON) assessment of American shad (Alosa sapidissima) approaching a hydroelectric dam

@article{Grote2014MultibeamS,
  title={Multibeam sonar (DIDSON) assessment of American shad (Alosa sapidissima) approaching a hydroelectric dam},
  author={A. Grote and M. Bailey and J. Zydlewski and J. Hightower},
  journal={Canadian Journal of Fisheries and Aquatic Sciences},
  year={2014},
  volume={71},
  pages={545-558}
}
We investigated the fish community approaching the Veazie Dam on the Penobscot River, Maine, prior to implementation of a major dam removal and river restoration project. Multibeam sonar (dual-frequency identification sonar, DIDSON) surveys were conducted continuously at the fishway entrance from May to July in 2011. A 5% subsample of DIDSON data contained 43 793 fish targets, the majority of which were of Excellent (15.7%) or Good (73.01%) observation quality. Excellent quality DIDSON targets… Expand
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