Layer: Elk Migration Lines _ Egg Lake _ 2001_2002 _ 2017_2020

View In: Map Viewer

Name: Elk Migration Lines _ Egg Lake _ 2001_2002 _ 2017_2020 _ ds2907

Display Field: mig

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: The project leads for the collection of this data were Erin Zulliger and Richard Shinn. Elk (6 adult females, 3 juvenile males, and 2 juvenile females) were captured in 2017 and equipped with Lotek satellite GPS collars or VHF tags, transmitting data from 2017-2020. Additional GPS data was collected from elk (6 females) in 2001-2002 and included in the analysis to supplement the small sample size of the 2017-2020 dataset. The Egg Lake elk herd migrates from a winter range surrounding Egg Lake in Modoc County, California eastward into Siskiyou County for the summer. GPS locations were fixed at 4-hour intervals in the 2017-2020 dataset and 3 to 8-hour intervals in the 2001-2002 dataset. Migration lines as symbolized connect GPS data points per elk per seasonal migration. GPS points were extracted only during migrations using net-squared displacement graphs. Nine migration sequences from 5 elk, with an average migration time of 6.78 days and an average migration distance of 26.83 km, were used from the 2000-2001 dataset. Fourteen migration sequences from 6 elk, with an average migration time of 7.79 days and an average migration distance of 42.40 km, were used from the 2017-2020 dataset.

Copyright Text: Migration Mapper: https://migrationinitiative.org/content/migration-mapper California Department of Fish and Wildlife (CDFW)

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Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

Drawing Info:

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Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field: id_year

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
mig (type: esriFieldTypeString, alias: mig, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
firstdate (type: esriFieldTypeString, alias: firstdate, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
lastdate (type: esriFieldTypeString, alias: lastdate, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
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season (type: esriFieldTypeString, alias: season, SQL Type: sqlTypeOther, length: 80, nullable: true, editable: true)
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Types:

id_year: 2017-2019

id_year: 2001-2002

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Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 7/21/2025 9:40:53 PM

Schema Last Edit Date: 7/21/2025 9:40:53 PM

Data Last Edit Date: 7/21/2025 9:24:38 PM

Supported Operations: Query Query Pivot Query Top Features Query Analytic Query Bins Generate Renderer Validate SQL Get Estimates ConvertFormat

Layer: Elk Migration Lines _ Egg Lake _ 2001_2002 _ 2017_2020 _ ds2907 (ID:0)