Middle Fork Salmon River, Idaho, Chinook salmon redd count database, 1995-2021

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Thurow, Russell F.
Originator: Guzevich, John W.
Originator: Nagel, David E.
Originator: Parkes-Payne, Sharon L.
Publication_Date: 2024
Title:
Middle Fork Salmon River, Idaho, Chinook salmon redd count database, 1995-2021
Geospatial_Data_Presentation_Form: tabular and vector digital data
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: Forest Service Research Data Archive
Online_Linkage: https://doi.org/10.2737/RDS-2024-0042
Description:
Abstract:
The Middle Fork Salmon River (MFSR) in Idaho is managed as a designated wild anadromous fish sanctuary with the objective of preserving the genetic integrity of wild, native salmonids. Despite abundant, high-quality natal (spawning and rearing) habitat, absence of hatchery fish, and low harvest rates, MFSR Chinook salmon and steelhead remain at risk of extirpation, primarily from factors outside the MFSR basin within the migration corridors of the Columbia and Snake rivers, estuaries, and the ocean. Habitat conditions throughout most of the MFSR are in excellent condition, and key limiting factors affecting these populations are from outside natal spawning and rearing areas. Concern for the persistence of Snake River Chinook salmon culminated in a final rule that listed Snake River spring-summer Chinook salmon as “Threatened” under the Endangered Species Act (ESA) of 1973.

This data publication contains tabular (comma-separated values file) and vector spatial data (shapefile and geopackage) of a spatiotemporal analysis of Chinook salmon distribution in the Middle Fork Salmon River drainage. The data were compiled from spatially continuous redd surveys (nest counts) encompassing all potential Chinook salmon spawning areas within the MFSR. Spatially continuous surveys were conducted via low-level helicopter flights and/or ground observers annually from 1995-2021 after Chinook salmon had completed spawning and while redds remained visible. The surveys were timed to coincide with the period of maximum spawning activity on a particular stream, and each transect was therefore assigned a target count-time window based on historic observations. Data include the longitude and latitude of the MFSR redds locations, name of the stream, year, and survey method (ground or helicopter).
Purpose:
Since 1995, the USDA Forest Service, Rocky Mountain Research Station (RMRS) biologists have conducted spatially continuous redd surveys (nest counts) encompassing all potential Chinook salmon spawning areas within the MFSR. RMRS goals were to improve monitoring of ESA-listed MFSR Chinook salmon populations and to improve understanding of the spatial and temporal characteristics of salmon population dynamics. The spatially continuous surveys were also developed to complement index-area redd surveys, provide more accurate escapement estimates, and increase analytical power.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19950901
Ending_Date: 20210914
Currentness_Reference:
Observed
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent:
The Middle Fork Salmon River (MFSR) is one of eight National Wild and Scenic Rivers originally designated in 1968. The MFSR drains about 7,330 square kilometers (km²) of a remote area of central Idaho and, for most of its length, flows through the Frank Church River of No Return Wilderness. From its origin at the confluence of Bear Valley and Marsh creeks, the MFSR flows north-northwest for 171 km through the Salmon River Mountains and joins the Salmon River 92 km downstream from Salmon, Idaho.
Bounding_Coordinates:
West_Bounding_Coordinate: -115.54802
East_Bounding_Coordinate: -114.35481
North_Bounding_Coordinate: 45.31307
South_Bounding_Coordinate: 44.21631
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Theme_Keyword: inlandWaters
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Animal ecology
Theme_Keyword: Inventory, Monitoring, & Analysis
Theme_Keyword: Monitoring
Theme_Keyword: Wildlife (or Fauna)
Theme_Keyword: Fish
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Chinook salmon
Theme_Keyword: redds
Theme_Keyword: distribution
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Idaho
Place_Keyword: Middle Fork Salmon River
Place_Keyword: Frank Church River of No Return Wilderness
Taxonomy:
Keywords/Taxon:
Taxonomic_Keyword_Thesaurus:
None
Taxonomic_Keywords: single species
Taxonomic_Keywords: animals
Taxonomic_Keywords: vertebrates
Taxonomic_Keywords: fish
Taxonomic_Keywords: Chinook salmon
Taxonomic_Keywords: Oncorhynchus tshawytscha
Taxonomic_System:
Classification_System/Authority:
Classification_System_Citation:
Citation_Information:
Originator: ITIS
Publication_Date: 2024
Title:
Integrated Taxonomic Information System
Geospatial_Data_Presentation_Form: on-line database
Other_Citation_Details:
Retrieved [June, 12, 2024]; CC0
Online_Linkage: https://www.itis.gov/
Online_Linkage: https://doi.org/10.5066/F7KH0KBK
Taxonomic_Procedures:
Taxonomic_Classification:
Taxon_Rank_Name: Kingdom
Taxon_Rank_Value: Animalia
Applicable_Common_Name: Animal
Applicable_Common_Name: animaux
Applicable_Common_Name: animals
Taxonomic_Classification:
Taxon_Rank_Name: Subkingdom
Taxon_Rank_Value: Bilateria
Taxonomic_Classification:
Taxon_Rank_Name: Infrakingdom
Taxon_Rank_Value: Deuterostomia
Taxonomic_Classification:
Taxon_Rank_Name: Phylum
Taxon_Rank_Value: Chordata
Applicable_Common_Name: cordés
Applicable_Common_Name: cordado
Applicable_Common_Name: chordates
Taxonomic_Classification:
Taxon_Rank_Name: Subphylum
Taxon_Rank_Value: Vertebrata
Applicable_Common_Name: vertebrado
Applicable_Common_Name: vertébrés
Applicable_Common_Name: vertebrates
Taxonomic_Classification:
Taxon_Rank_Name: Infraphylum
Taxon_Rank_Value: Gnathostomata
Taxonomic_Classification:
Taxon_Rank_Name: Superclass
Taxon_Rank_Value: Actinopterygii
Applicable_Common_Name: ray-finned fishes
Applicable_Common_Name: spiny rayed fishes
Applicable_Common_Name: poisson épineux
Applicable_Common_Name: poissons à nageoires rayonnées
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Teleostei
Taxonomic_Classification:
Taxon_Rank_Name: Superorder
Taxon_Rank_Value: Protacanthopterygii
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Salmoniformes
Applicable_Common_Name: saumons
Applicable_Common_Name: salmons
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Salmonidae
Applicable_Common_Name: salmonids
Applicable_Common_Name: trouts and salmons
Applicable_Common_Name: truchas y salmones
Applicable_Common_Name: truites et saumons
Applicable_Common_Name: salmons
Applicable_Common_Name: trouts
Taxonomic_Classification:
Taxon_Rank_Name: Subfamily
Taxon_Rank_Value: Salmoninae
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Oncorhynchus
Applicable_Common_Name: Pacific salmon
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Oncorhynchus tshawytscha
Applicable_Common_Name: Chinook salmon
Applicable_Common_Name: salmón boquinegra
Applicable_Common_Name: king salmon
Applicable_Common_Name: saumon chinook
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Thurow, Russell F.; Guzevich, John W.; Nagel, David E.; Parkes-Payne, Sharon L. 2024. Middle Fork Salmon River, Idaho, Chinook salmon redd count database, 1995-2021. Fort Collins, CO: Forest Service Research Archive. https://doi.org/10.2737/RDS-2024-0042
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Rocky Mountain Research Station, Boise Aquatic Sciences Lab
Contact_Person: Sharon L. Parkes-Payne
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical
Address: 322 East Front Street, Suite 401
City: Boise
State_or_Province: ID
Postal_Code: 83702
Country: USA
Contact_Voice_Telephone: 208-373-4356
Contact_Electronic_Mail_Address: Sharon.L.Payne@usda.gov
Contact Instructions: This contact information was current as of original publication date. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Data_Set_Credit:
These data were funded by the USDA Forest Service, Rocky Mountain Research Station.


Author Information:

Russell F. Thurow
USDA Forest Service, Rocky Mountain Research Station (Emeritus)

John W. Guzevich
USDA Forest Service, Rocky Mountain Research Station

David E. Nagel
USDA Forest Service, Rocky Mountain Research Station

Sharon L. Parkes-Payne
USDA Forest Service, Rocky Mountain Research Station
https://orcid.org/0000-0003-1138-4321
Cross_Reference:
Citation_Information:
Originator: Idaho Department of Fish and Game
Publication_Date: 2019
Title:
Fisheries Management Plan, 2019–2024
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Boise, ID
Publisher: Idaho Department of Fish and Game
Other_Citation_Details:
[accessed March 2019]
Online_Linkage: https://idfg.idaho.gov/fish/plans
Online_Linkage: https://idfg.idaho.gov/sites/default/files/2019-2024-idaho-fisheries-management-plan-original.pdf
Cross_Reference:
Citation_Information:
Originator: Isaak, Daniel J.
Originator: Thurow, Russell F.
Publication_Date: 2006
Title:
Network-scale spatial and temporal variation in Chinook salmon (Oncorhynchus tshawytscha) redd distributions: patterns inferred from spatially continuous replicate surveys
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Canadian Journal of Fisheries and Aquatic Sciences
Issue_Identification: 63(2): 285-296
Online_Linkage: https://doi.org/10.1139/f05-214
Online_Linkage: https://www.fs.usda.gov/research/treesearch/23715
Cross_Reference:
Citation_Information:
Originator: Matthews, Gene M.
Originator: Waples, Robin S.
Publication_Date: 1991
Title:
Status review for Snake River spring and summer chinook salmon
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: NOAA Technical Memorandum
Issue_Identification: NMFS F/NWC-200
Publication_Information:
Publication_Place: Seattle, WA
Publisher: National Marine Fisheries Service
Online_Linkage: https://repository.library.noaa.gov/view/noaa/48850
Cross_Reference:
Citation_Information:
Originator: National Marine Fisheries Service
Publication_Date: 2017
Title:
ESA Recovery Plan for Snake River Spring/Summer Chinook Salmon (Oncorhynchus tshawytscha) & Snake River Basin Steelhead (Oncorhynchus mykiss)
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Seattle, WA
Publisher: National Marine Fisheries Service
Other_Citation_Details:
[accessed January 2023]
Online_Linkage: https://media.fisheries.noaa.gov/dam-migration/final-snake-river-spring-summer-chinook-salmon-and-snake-river-steelhead-recovery-plan-2017.pdf
Online_Linkage: https://www.fisheries.noaa.gov/resource/document/recovery-plan-snake-river-spring-summer-chinook-salmon-and-snake-river-basin
Cross_Reference:
Citation_Information:
Originator: Thurow, Russell F.
Publication_Date: 1985
Title:
Federal aid in fish restoration job completion report, Project: F-73-R-6, Subproject II: River and Stream Investigations, Study VI: Middle Fork Salmon River fisheries investigations
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Fishery Research
Issue_Identification: 057(07)
Publication_Information:
Publication_Place: Boise, ID
Publisher: Idaho Department of Fish and Game
Other_Citation_Details:
[accessed September 2018]
Online_Linkage: https://collaboration.idfg.idaho.gov/FisheriesTechnicalReports/Res-Thurow1984%20River%20and%20Stream%20Investigations%20Middle%20Fork%20Salmon%20River.pdf
Cross_Reference:
Citation_Information:
Originator: Thurow, Russell F.
Publication_Date: 2000
Title:
Dynamics of chinook salmon populations within Idaho's Frank Church Wilderness: implications for persistence
Geospatial_Data_Presentation_Form: conference proceedings
Other_Citation_Details:
pages 143-151
Online_Linkage: https://www.fs.usda.gov/research/treesearch/21980
Larger_Work_Citation:
Citation_Information:
Originator: McCool, Stephen F. (comp.)
Originator: Cole, David N. (comp.)
Originator: Borrie, William T. (comp.)
Originator: O'Loughlin, Jennifer (comp.)
Publication_Date: 2000
Title:
Wilderness science in a time of change conference
Edition: Volume 3: Wilderness as a place for scientific inquiry
Geospatial_Data_Presentation_Form: conference proceedings
Series_Information:
Series_Name: Conference Proceedings
Issue_Identification: RMRS-P-15-VOL-3
Publication_Information:
Publication_Place: Ogden, UT
Publisher: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station
Other_Citation_Details:
1999 May 23 27; Missoula, MT
Online_Linkage: https://www.fs.usda.gov/research/treesearch/6417
Analytical_Tool:
Analytical_Tool_Description:
ET GeoWizards is a data processing extension for ArcGIS.
Tool_Access_Information:
Online_Linkage: https://www.ian-ko.com/
Tool_Access_Instructions:
see website
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These data are not meant to be used at any scale less than 1:250,000 (for example 1:100,000 or 1:24,000).

Aerial surveys between 0900 and 1800 hours enhanced direct overhead light and improved visibility. To avoid introducing interobserver bias (Dunham et al. 2001), all RMRS aerial surveys and ground-based surveys were conducted by the same RMRS observers (R. Thurow and J. Guzevich). An experienced backcountry pilot flew a turbine helicopter and maintained very slow airspeeds (10–15 knots) at low altitudes (15–50 meters [m]) above the stream bed, depending on the surrounding terrain. The helicopter also facilitated re-flying challenging areas. When redds were observed, a global positioning system (GPS; Pathfinder ProXL, Trimble, Sunnyvale, California) was used to georeference and record locations. All GPS locations were differentially corrected with known base stations. Dense riparian canopy precluded aerial observation in some reaches and the experienced ground-based observer annually walked those streams and recorded redd coordinates with a handheld GPS. Both aerial and ground-based observers wore polarized sunglasses and searched potential spawning areas for the characteristic pit and tailspill morphology of Chinook salmon redds (Burner 1951). Discerning salmon redds from those of other fall-spawning salmonids (e.g., bull trout, Salvelinus confluentus) was not problematic, given the larger size of salmon redds and their earlier time of construction.

Dunham, Jason B.; Rieman, Bruce. 2001. Sources and magnitude of sampling error in redd counts for bull trout. North American journal of fisheries management. 21(2): 343-352. https://doi.org/10.1577/1548-8675(2001)021<0343:SAMOSE>2.0.CO;2 and https://www.fs.usda.gov/research/treesearch/23968

Burner, Clifford J. 1951. Characteristics of spawning nests of Columbia River salmon. Fishery Bulletin of the Fish and Wildlife Service. 52(1): 97-110. https://spo.nmfs.noaa.gov/content/characteristics-spawning-nests-columbia-river-salmon
Logical_Consistency_Report:
Redd count validation based on intensive, replicated ground surveys suggested a strong relationship between aerial counts and “true” counts (Thurow and McGrath 2010). Because we were unable to quantify other sources of error in the RMRS database, we assumed that annual redd counts were without error, the classical design-based approach to statistical inference (Thompson 1992; Courbois et al. 2008).


Courbois, Jean-Yves; Katz, Stephen L.; Isaak, Daniel J.; Steel, E. Ashley; Thurow, Russell F.; Rub, A. Michelle Wargo; Olsen, Tony; Jordan, Chris E. 2008. Evaluating probability sampling strategies for estimating redd counts: an example with Chinook salmon (Oncorhynchus tshawytscha). Canadian Journal of Fisheries and Aquatic Sciences. 65: 1814-1830. https://doi.org/10.1139/F08-092 and https://www.fs.usda.gov/research/treesearch/32585

Thurow, Russell F.; McGrath, Claire C. 2010. Evaluating the bias and precision of Chinook salmon redd counts in the Middle Fork Salmon River basin, Idaho. Annual Report for BPA Project Number 2002-049-00, Contract 48835. Prepared for U.S. Department of Energy Bonneville Power Administration, Portland, OR.

Thompson, S.K. 1992. Sampling. Wiley, New York. https://doi.org/10.1002/9781118162934
Completeness_Report:
All points that were validated were included.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
Potential spawning areas were identified in 12 tributaries and the mainstem MFSR by reviewing past redd locations and juvenile Chinook salmon occurrence, inspecting anecdotal redd accounts, and contacting biologists familiar with the drainage (Thurow 2000). Surveyed stream reaches totaled nearly 700 km of potential, accessible spawning habitats (Thurow et al. 2020). RMRS annually surveyed all potential Chinook salmon spawning areas at the end of the spawning period. Spatially continuous surveys were conducted after Chinook salmon had completed spawning and while redds remained visible. MFSR Chinook salmon spawn timing varies among sites and typically begins in late July in the highest elevations (1800–2100 m) and continues into September in the lowest elevations (1000–1300 m). Consequently, redd surveys typically began at the highest elevations in early September and were completed in lower elevations from 11-14 September. Salmon spawned later during larger escapements and to achieve a complete census during larger returns from 2001 to 2003, RMRS completed a second, late September survey of the lower mainstem MFSR and lower Big Creek.

Low-level helicopter flights provided annual, spatially continuous Chinook salmon redd surveys within all potential spawning streams in the project area. Aerial surveys between 0900 and 1800 hours enhanced direct overhead light and improved visibility. To avoid introducing interobserver bias (Dunham et al. 2001), all RMRS aerial surveys and ground-based surveys were conducted by the same RMRS observers (R. Thurow and J. Guzevich). An experienced backcountry pilot flew a turbine helicopter and maintained very slow airspeeds (10–15 knots) at low altitudes (15–50 m) above the stream bed, depending on the surrounding terrain. The helicopter also facilitated re-flying challenging areas. When redds were observed, a global positioning system (GPS; Pathfinder ProXL, Trimble, Sunnyvale, California) was used to georeference and record locations. All GPS locations were differentially corrected with known base stations. Dense riparian canopy precluded aerial observation in some reaches and the experienced ground-based observer annually walked those streams and recorded redd coordinates with a handheld GPS. Both aerial and ground-based observers wore polarized sunglasses and searched potential spawning areas for the characteristic pit and tailspill morphology of Chinook salmon redds (Burner 1951). Discerning salmon redds from those of other fall-spawning salmonids (e.g., bull trout, Salvelinus confluentus) was not problematic, given the larger size of salmon redds and their earlier time of construction.
Methodology_Citation:
Citation_Information:
Originator: Burner, Clifford J.
Publication_Date: 1951
Title:
Characteristics of spawning nests of Columbia River salmon
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Fishery Bulletin of the Fish and Wildlife Service
Issue_Identification: 52: 97–110
Online_Linkage: https://spo.nmfs.noaa.gov/content/characteristics-spawning-nests-columbia-river-salmon
Methodology_Citation:
Citation_Information:
Originator: Dunham, Jason B.
Originator: Rieman, Bruce
Publication_Date: 2001
Title:
Sources and magnitude of sampling error in redd counts for bull trout
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: North American journal of fisheries management
Issue_Identification: 21(2): 343-352
Online_Linkage: https://doi.org/10.1577/1548-8675(2001)021<0343:SAMOSE>2.0.CO;2
Online_Linkage: https://www.fs.usda.gov/research/treesearch/23968
Methodology_Citation:
Citation_Information:
Originator: Thurow, Russell F.
Publication_Date: 2000
Title:
Dynamics of chinook salmon populations within Idaho's Frank Church Wilderness: implications for persistence
Geospatial_Data_Presentation_Form: conference proceedings
Other_Citation_Details:
pages 143-151
Online_Linkage: https://www.fs.usda.gov/research/treesearch/21980
Larger_Work_Citation:
Citation_Information:
Originator: McCool, Stephen F. (comp.)
Originator: Cole, David N. (comp.)
Originator: Borrie, William T. (comp.)
Originator: O'Loughlin, Jennifer (comp.)
Publication_Date: 2000
Title:
Wilderness science in a time of change conference
Edition: Volume 3: Wilderness as a place for scientific inquiry
Geospatial_Data_Presentation_Form: conference proceedings
Series_Information:
Series_Name: Conference Proceedings
Issue_Identification: RMRS-P-15-VOL-3
Publication_Information:
Publication_Place: Ogden, UT
Publisher: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station
Other_Citation_Details:
1999 May 23 27; Missoula, MT
Online_Linkage: https://www.fs.usda.gov/research/treesearch/6417
Methodology_Citation:
Citation_Information:
Originator: Thurow, Russell F.
Originator: Copeland, Timothy
Originator: Oldemeyer, Bryce N.
Publication_Date: 2020
Title:
Wild salmon and the shifting baseline syndrome: Application of archival and contemporary redd counts to estimate historical Chinook salmon (Oncorhynchus tshawytscha) production potential in the Central Idaho wilderness
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Canadian Journal of Fisheries and Aquatic Sciences
Issue_Identification: 77: 651-665
Online_Linkage: https://doi.org/10.1139/cjfas-2019-0111
Online_Linkage: https://www.fs.usda.gov/research/treesearch/59146
Source_Information:
Source_Citation:
Citation_Information:
Originator: United States Geological Survey
Publication_Date: Unknown
Title:
National Hydrography Dataset (NHD) 1:24,000 NHDFlowline stream layer
Edition: version 1
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Department of the Interior, U.S. Geological Survey
Other_Citation_Details:
[accessed 2018]
Online_Linkage: https://www.usgs.gov/national-hydrography/access-national-hydrography-products
Type_of_Source_Media: Online
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1995
Ending_Date: 2018
Source_Currentness_Reference:
Ground Condition
Source_Citation_Abbreviation:
USGS (2018)
Source_Contribution:
Polyline shapefile of 1:24,000 scale NHD streamlines within the study area to which the redds were “snapped.”
Process_Step:
Process_Description:
RMRS assembled redd location data into a geographic information system (GIS) and developed annual, cumulative GIS maps and databases of redd location and survey method. All data from 1995 through 2018 were collected by the same RMRS observers listed above. Since 2019, surveys have been completed by Idaho Department of Fish and Game biologists that were trained by the RMRS observer.

The points for the snapped spatial data were snapped to the NHD 1:24,000 NHDFlowline stream lines in 2018 using ET GeoWizards for ArcGIS using methods that ensured the points snapped to the correct streamlines.
Source_Used_Citation_Abbreviation:
USGS (2018)
Process_Date: Unknown
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 19482
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 38
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 11
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -117
Latitude_of_Projection_Origin: 0
False_Easting: 500000.0
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate Pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0000
Denominator_of_Flattening_Ratio: 298.25722210
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Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below you will find a list and description of the files included in this data publication.


VARIABLE DESCRIPTION FILE (1)

1. \Data\_variable_descriptions.csv: Comma-separated values (CSV) file containing a list and description of variables found in all data files. (A description of these variables is also provided in the metadata below.)

Columns include:

Filename = Name of data file

Variable = Name of variable

Units = Units (if applicable)

Precision = Precision (if applicable)

Description = Description of variable



DATA FILES (6)

1. \Data\Spatial\MFSR_all_spatial_data.gpkg: OGC Geopackage (GPKG) containing the same content found in the three *.SHP files included in this package.


2. \Data\Spatial\MFSR_ChinookRedds_1995_2021.shp: Point shapefile (SHP) (and associated files) containing the original GPS locations of the Middle Fork Salmon River (MFSR) Chinook redds obtained during aerial and ground surveys.

Attributes include:

FID = Internal feature number.

Shape = Coordinates defining the features.

STREAM = Stream name of the redd observation.

METHOD = Method of the observation of the redd.
AIR = helicopter survey
GROUND = ground survey

YEAR = The year the redd observation was made.


3. \Data\Spatial\MFSR_ChinookRedds_1995_2021_Snapped.shp: Point SHP containing the MFSR redds GPS locations “snapped” to 1:24,000 scale NHD streamlines.

Attributes include:

FID = Internal feature number.

Shape = Coordinates defining the features.

STREAM = Stream name of the redd observation.

METHOD = Method of the observation of the redd.
AIR = helicopter survey
GROUND = ground survey

YEAR = The year the redd observation was made.


4. \Data\Spatial\MFSR_NHD_24K_Streamlines.shp: Polyline SHP containing the 1:24,000 scale NHD MFSR streamlines to which the redds were “snapped.”

Attributes include:

FID = Internal feature number.

Shape = Coordinates defining the features.

GNIS_NAME = Proper name, specific term, or expression by which a particular geographic entity is known. If GNIS_Name = “null” if no name is associated with the feature.


5. \Data\Tabular\MFSR_ChinookRedds_1995_2021_Text.csv: CSV file containing the original MFSR redds GPS locations obtained during aerial and ground surveys with latitude-longitude coordinates in units decimal degrees.

Attributes include:

Record = Unique sequential number.

STREAM = Stream name of the redd observation.

METHOD = Method of the observation of the redd.
AIR = helicopter survey
GROUND = ground survey

YEAR = The year the redd observation was made.

LON_DD = Longitude (decimal degrees) of original GPS locations obtained during aerial and ground surveys.

LAT_DD = Latitude (decimal degrees) of original GPS locations obtained during aerial and ground surveys.


6. \Data\Tabular\MFSR_ChinookRedds_1995_2021_Snapped_Text.csv: CSV file containing the MFSR redds GPS locations “snapped” to 1:24,000 scale NHD streamlines with latitude-longitude coordinates in units decimal degrees.

Attributes include:

Record = Unique sequential number.

STREAM = Stream name of the redd observation.

METHOD = Method of the observation of the redd.
AIR = helicopter survey
GROUND = ground survey

YEAR = The year the redd observation was made.

LON_DD = Longitude (decimal degrees) of original GPS locations obtained during aerial and ground surveys.

LAT_DD = Latitude (decimal degrees) of original GPS locations obtained during aerial and ground surveys.
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