Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • AFSC/NMML/CCEP: Diet of Pacific harbor seals at Umpqua River, Oregon and Columbia River, Oregon/Washington during 1994 through 2005

    Metadata Updated: November 1, 2024

    From 1994 to 2005, The National Marine Mammal Laboratories' California Current Ecosystem Program (AFSC/NOAA) collected fecal samples at the Umpqua River, Oregon and Columbia River, Oregon/Washington to examine the diet of Pacific harbor seals (Phoca vitulina). Scats were collected at various sites on the Umpqua River and at Desdemona sand spit on the Columbia River. Apart from describing the diet of Pacific harbor seals in these regions, of special interest was to determine the level of predation by these seals on endangered or threatened salmonids (e.g. cutthroat trout; Oncorhyncus clarkii).

    Access & Use Information

    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.

    Downloads & Resources

    Dates

    Metadata Date October 3, 2024
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 1, 2024
    Reference Date(s) 2016 (publication)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NMFS AFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date October 3, 2024
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 1, 2024
    Reference Date(s) 2016 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:28079
    Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/NMML/CCEP: Diet of Pacific harbor seals at Umpqua River, Oregon and Columbia River, Oregon/Washington during 1994 through 2005 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/28079., Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed., Use Constraints: User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. Acknowledgement of NOAA/NMFS/AFSC, as the source from which these data were obtained in any publications and/or other representations of these, data is suggested. Cite data as: Orr, A. J., Laake, J. L., Banks, A. S., Dhruv, M. I., Huber, H. H., Browne, P., DeLong, R. L., and Mellman, S. 2016. Laboratory analysis of diet of Pacific harbor seals at Umpqua River, Oregon and Columbia River, Oregon/Washington conducted from 1994-06-23 to 2005-09-03 (NCEI Accession 0139413). Version 1.1. NOAA National Centers for Environmental Information. Dataset., Distribution Liability: The user is responsible for the results of any application of this data for other than its intended purpose. NOAA denies liability if the data are misused. Applications or inferences derived from the data should be carefully considered for accuracy. Whereas every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
    Bbox East Long -122
    Bbox North Lat 48.5
    Bbox South Lat 42
    Bbox West Long -125
    Coupled Resource
    Frequency Of Update asNeeded
    Harvest Object Id d3ae9b4f-a78e-4cc6-9750-f0b482b25ded
    Harvest Source Id 26a29bb9-50b0-47fd-920b-edc74aa6ec76
    Harvest Source Title NMFS AFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Fecal samples were collected at Pacific harbor sea haulout sites at Desdemona sand spit on the Columbia river and at the Umpqua River, Oregon, and placed in Whirl-Pak bags. Fecal samples were cleaned using nested sieves or a washing machine set on gentle cycle (Orr et al. 2003). Prey hard parts were separated from waste material and subsequently identified to the lowest taxon possible using a microscope, prey reference collection, and prey identification keys. Sizes of prey were determined from measurements of fish otoliths and cephalopod beaks. Sizes were measured using calipers or ocular micrometer. Measurements were used to estimate prey size from published regression equations. Data were entered into a database. Data analyses were performed to address research questions about Pacific harbor seal diet. More detailed methods are provided in Browne et al. 2002, Laake et al. 2002, Orr et al. 2004
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-125.0, 42.0], [-122.0, 42.0], [-122.0, 48.5], [-125.0, 48.5], [-125.0, 42.0]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1994
    Temporal Extent End 2005

    Didn't find what you're looking for? Suggest a dataset here.