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Diet of Chinook and coho salmon in the Elwha River estuary, Washington, before and during dam removal

Metadata Updated: July 6, 2024

This portion of the data release presents fish diet data from Chinook and coho salmon collected in the Elwha River estuary, Washington, in 2006, 2007, 2013, and 2014 (there are no associated USGS Field Activities numbers because data were collected predominantly by biologists from the Lower Elwha Klallam Tribe). Fish were collected using a beach seine at six locations throughout the estuary. Fish were transferred to buckets containing aerated ambient water and kept cool until handling. We anesthetized fish in a diluted solution of tricaine methanesulfonate (MS-222) to count, identify, and measure fork length (FL) to the nearest mm and weight to the nearest 0.1 g. After recovery from anesthesia, all fish were released at the point of capture. Stomach contents from a sub-sample of Chinook and coho were extracted via non-lethal gastric lavage and preserved in ethanol. When possible, stomach contents from ten individuals of each species between 55–199 mm fork length were collected at each site during each sampling event. Fish with no regurgitated prey were recorded as empty stomachs. Fish diet samples were sent to a professional taxonomist for processing and identification to the lowest practical taxonomic level. Aquatic taxa were typically identified to the genus or species level and terrestrial taxa to family or genus. Some less-common taxa or partially-digested prey items were identified to Order or Class. The locations of samples were determined with a hand-held global positioning system. Fish diet data are provided in a comma-delimited spreadsheet.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Identifier USGS:5f287fa082cef313ed9e1c96
Data Last Modified 20211013
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 9fc18c28-a789-46b0-a781-f43e783917d1
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -123.56768,48.1451,-123.56135,48.14993
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash a41f5e455e96d2204ebb19d331360188d1d2348c18e7e961dd0bfd30784f9b90
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -123.56768, 48.1451, -123.56768, 48.14993, -123.56135, 48.14993, -123.56135, 48.1451, -123.56768, 48.1451}

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