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Pacific lampreys pass through Bonneville Lock & Dam using fish ladders and special ramp-like lamprey passage structures and seen here through viewing windows at the Bradford Island Visitor’s Center, July 6, 2023.
Pacific lamprey, an ancient, eel-like fish species, are seeing returns 170 percent higher than the 10-year average (2013-2022) at Bonneville Lock and Dam this year. Lamprey numbers are also 252 percent higher than the four-year average, according to biologists responsible for reporting the number of fish counted as they migrate upstream past mainstem Columbia and Snake River dams.
Pacific lampreys belong to a primitive group of fishes that are eel-like in form but lack the jaws and paired fins of true fishes. Pacific lampreys have a round sucker-like mouth, no scales and gill openings. Identification of lampreys depends largely on the number, structure and position of teeth found in adult lamprey.
(USACE photo by Kerry Solan)
| Date Taken: | 07.06.2023 |
| Date Posted: | 09.25.2023 12:25 |
| Photo ID: | 8040635 |
| VIRIN: | 230706-A-ET072-3542 |
| Resolution: | 1682x940 |
| Size: | 567.5 KB |
| Location: | OREGON, US |
| Web Views: | 26 |
| Downloads: | 1 |
This work, Pacific lamprey returns eclipsing other years, by Kerry Solan, identified by DVIDS, must comply with the restrictions shown on https://www.dvidshub.net/about/copyright.
