1. Ohio Department of Natural ResourcesDivision of Wildlife10517 Canal Road SoutheastHebronOhio43025USA
2. University of Washington, School of Aquatic and Fishery SciencesBox 355020SeattleWashington98198‐5020USA
3. Aquacoustics, Inc.29824 Birdie Haven CourtSterlingAlaska99672‐1473USA
4. National Marine Fisheries Service, Alaska Fishery Science Center7600 Sand Point Way NortheastSeattleWashington98115‐6349USA