Cooperator - CSU
Email:
jhennig@usgs.gov
|
These data are detections of bison in Grand Canyon National Park made during helicopter surveys between 2019 and 2021, and an aerial infrared imagery survey done in February 2020.
Categories: Data;
Tags: Arizona,
Ecology,
North Rim,
Powell Plateau,
USGS Science Data Catalog (SDC), All tags...
USGS-EMA-LOW-PL Grand Canyon,
Wildlife Biology,
abundance estimation,
aerial survey,
biota,
bison,
detection probability,
double-observer,
helicopter,
sightability,
thermal infrared, Fewer tags
|
Feral burros (Equus asinus) and horses (E. ferus caballus) inhabiting public land in the western United States are intended to be managed at population levels established to promote a thriving, natural ecological balance. Like many large ungulate populations, management agencies employ aerial surveys to obtain estimates of horse and burro population sizes. Double-observer sightability (MDS) models perform well for estimating feral horse abundances, yet the effectiveness of these models for use in burro populations is less understood and may be different due to the smaller size, stoic behavior, and cryptic pelage of burros. These models help minimize detection bias, yet bias can be further reduced with models that...
Categories: Data;
Tags: Arizona,
California,
Ecology,
Fort Irwin National Training Center,
Lake Pleasant Herd Management Area, All tags...
Sinbad Herd Management Area,
USGS Science Data Catalog (SDC),
USGS-EMA-LOW-MR Rangeland,
USGS-EMA-LOW-SB SMC: Wild horses,
Utah,
Wildlife Biology,
abundance estimation,
aerial survey,
biota,
burro,
detection probability,
double-observer,
helicopter,
residual heterogeneity,
sightability, Fewer tags
|
These data are detections of burros in the Sinbad Herd Management Area in central Utah made during aerial thermal infrared-based distance sampling surveys in December 2015 and May 2016. Burros were detected from a fixed wing aircraft using an infrared camera mounted on the underside of the aircraft. A monitor screen was inside the aircraft, connected to the camera so the observer could look for burros in the monitor. Aircraft flew at 2,000 feet above ground level. These data were collected to estimate the population size of burros in the Sinbad Herd Management Area and to examine effectiveness between helicopter and aerial thermal infrared survey types. To assess performance of the different survey types, data analyses...
Categories: Data;
Tags: Ecology,
Remote Sensing,
Sinbad Herd Management Area,
USGS Science Data Catalog (SDC),
Utah, All tags...
Wildlife Biology,
abundance estimation,
aerial survey,
biota,
burro,
distance sampling,
thermal infrared, Fewer tags
|
|
