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Assessments to determine the effect of current and alternate ladder operations on brood stock collection and behavior of hatchery fall Chinook Salmon at Little White Salmon National Fish Hatchery during 2004-05

Summary

Type of release
a one-off release of a single dataset

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
16 May 2015
Modified Date
16 May 2015
Publishers
US Fish and Wildlife Service, Department of the Interior
Keywords
fisheries-management, management, natural-resources-management
Identifier
assessments-to-determine-the-effect-of-current-and-alternate-ladder-operations-on-brood-20
Landing Page
http://catalog.data.gov/dataset/assessments-to-determine-the-effect-of-current-and-alternate-ladder-operations-on-brood-20
Maintainers
Richard Easterbrook richard_easterbrook@fws.gov

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Description

Production of upriver bright fall Chinook salmon at Little White Salmon National Fish Hatchery was introduced as part of the John Day Dam mitigation program in the early 1980s. Upriver bright fall Chinook salmon are not native to the Little White Salmon River basin and are an introduced stock for the Lower Columbia River Chinook Evolutionary Significant Unit, as listed under the Endangered Species Act. There is concern regarding potential ecological effects, especially hatchery introgression effects, if wide spread straying of this stock occurs in the Columbia River USFWS 2004. Objectives of this study were to determine if hatchery brood stock collection is representative of the hatchery return; determine if intermittent ladder openings increase natural spawning and straying of Little White Salmon National Fish Hatchery returning adults; and determine the final destination of fish not allowed access to the hatchery or selected for brood stock.

General Information

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This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

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