Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A. Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/sx61dm68v

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  • We describe the migration distances and timing of the adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River Basin (Oregon, U.S.A.). We conducted aerial surveys to track radio-tagged fish upstream of a major waterfall and hydropower complex en route to spawning areas. We detected 24 out of the 43 fish that passed the waterfall-hydropower complex. Of the detected fish, 17 were detected multiple times. Their maximum migration distance upstream in the mainstem Willamette approximated a normal distribution. The maximum distance migrated upstream did not significantly correlate with total body length (r = -0.186, P = 0.385) or date that the fish passed Willamette Falls (r = -0.118, P = 0.582). Fish migrated primarily during the spring to early summer period before stopping during the summer, when peak river temperatures (a parts per thousand yen20A degrees C). However, at least three fish continued to migrate upstream after September. Behavior ranged from relatively slow migration, followed by holding; to rapid migration, followed by slow migration further up in the basin. This study provides a basis for informing more detailed research on Pacific lamprey in the future.
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  • Clemens, B. J., Mesa, M. G., Magie, R. J., Young, D. A., & Schreck, C. B. (2012). Pre-spawning migration of adult pacific lamprey, entosphenus tridentatus , in the willamette river, oregon, U.S.A. Environmental Biology of Fishes, 93(2), 245-254. doi: 10.1007/s10641-011-9910-3
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  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2012-11-05T23:19:48Z No. of bitstreams: 1 ClemensBenjaminJFisheriesWildlifePrespawningMigrationAdult.pdf: 582583 bytes, checksum: 484bdb7d5e4fe4ecc96412727c0cb7e1 (MD5)
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2012-11-05T23:35:07Z (GMT) No. of bitstreams: 1 ClemensBenjaminJFisheriesWildlifePrespawningMigrationAdult.pdf: 582583 bytes, checksum: 484bdb7d5e4fe4ecc96412727c0cb7e1 (MD5)
  • description.provenance : Made available in DSpace on 2012-11-05T23:35:07Z (GMT). No. of bitstreams: 1 ClemensBenjaminJFisheriesWildlifePrespawningMigrationAdult.pdf: 582583 bytes, checksum: 484bdb7d5e4fe4ecc96412727c0cb7e1 (MD5) Previous issue date: 2012-02

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