About this Dataset

Elk Home Range - Egg Lake - 2017-2020 [ds3168]

The project lead for the collection of this data was Erin Zulliger. Elk (6 adult females) were captured and equipped with GPS collars (Litetrack/Pinpoint Iridium collars, Lotek Wireless Inc., Newmarket, Ontario, Canada or Vectronic Aerospace) transmitting data from 2017-2020. The Egg Lake herd migrates between traditional summer and winter seasonal ranges, and migration corridors, migration stopovers, and winter ranges were modeled separately for this herd, but are not a part of this analysis. Annual home ranges were modeled using year-round data to demarcate high use areas. GPS locations were fixed at 1-4 hour intervals in the dataset. To improve the quality of the data set, the GPS data locations fixed in 2D space and visually assessed as a bad fix by the analyst were removed.

The methodology used for this migration analysis allowed for the mapping of the herd’s annual range. Brownian bridge movement models (BBMMs; Sawyer et al. 2009) were constructed with GPS collar data from 5 elk, including 9 annual home range sequences, location, date, time, and average location error as inputs in Migration Mapper. BBMMs were produced at a spatial resolution of 50 m using a sequential fix interval of less than 27 hours. Home range is visualized as the 50th percentile contour (high use) and the 99th percentile contour of the year-round utilization distribution. Annual home range designations for this herd may expand with a larger sample.
Organization: State of California
Last updated: 2025-07-23T21:55:34.268186
Tags: auth_cdfw, brownian-bridge-movement-model, california-department-of-fish-and-wildlife, california-natural-resources-agency, caopendata, cdfw, cervus-canadensis, connectivity, ds3168_20240415_wm, elk, gps, home-range, migration-mapper, telemetry

Tables

Table 1

@usgov.ca_gov_elk_home_range_egg_lake_2017_2020_ds3168_3812b.table_1

4.5 kB
2 rows
5 columns

CREATE TABLE table_1 (
  "objectid" BIGINT,
  "details" VARCHAR,
  "ud_percent" BIGINT,
  "shape_area" DOUBLE  -- Shape, Area,
  "shape_length" DOUBLE  -- Shape, Length
);