Biologist holding a fish tracking device called an iButton.

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Eric Warner, a Muckleshoot fisheries biologist, holds an iButton device. iButton tags are used to record sea temperature as the salmon move from various habitats.

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Size: 5010px × 3353px
Location: Seattle, Washington, USA
Photo credit: © JS Photo / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: adults, biologist, caucasian, change, cropped, device, environmental, fish, hands, holding, horizontal, issue, man, migration, salmon, scientist, tags, technology, temperature, tracking