Skip to main content
Advanced Search

Filters: Tags: migration (X)

148 results (75ms)   

View Results as: JSON ATOM CSV
The winter range of the West Goose Lake Rocky Mountain elk (Cervus canadensis nelsoni) sub-herd is located north of Alturas and west of Highway 395 within the Devil’s Garden Ranger District of the Modoc National Forest. This area is characterized by juniper (Juniperus occidentalis) woodlands, and sagebrush flats with some stands of lodgepole (Pinus contorta) and ponderosa pine (Pinus ponderosa) throughout flat, rocky terrain. From this area, a portion of the herd migrates approximately 50 miles north into Oregon’s Fremont National Forest, habitat that primarily consists of lodgepole and ponderosa pine forests. Minimal barriers exist along this migration route since the corridor primarily occurs on land managed by...
The East Shasta Valley sub-herd of Rocky Mountain elk (Cervus canadensis nelsoni) spend most of their time on private ranchlands in Shasta Valley in the winter. This area offers patches of oak woodlands and grasslands on gentle slopes. In the spring, elk migrate to their summer range around Grass Lake, Bull Meadows, and Deer Mountain where the habitat is primarily characterized by mixed conifer timber stands of Ponderosa pine (Pinus ponderosa), lodgepole pine (Pinus contorta) and Douglas fir (Pseudotsuga menziesii). The meadows around Grass Lake seem especially important to this sub-herd, as neonatal calves have been documented in this area since at least 1984 (Fischer 1987). Some animals from this sub-herd migrate...
Migratory mule deer (Odocoileus hemionus) within the San Joaquin Watershed occupy most of the watershed above Kerckhoff Reservoir, Fresno and Madera Counties, California. Human infrastructure in the watershed is widespread and includes residential, water control, hydroelectric power, and recreational use developments. Steep topography between winter and summer range limit crossing points along the San Joaquin River. Habitat conditions favoring deer declined from a peak around 1950, resulting in a reduction in the deer population. The current deer population is believed to be about 4,000. A massive wildfire burned through most of the watershed in 2020, dramatically changing habitat conditions in some areas. These...
A significant portion of the interstate Carson River herd summers in the Sierra Nevada range of California and migrates to a winter range near the California-Nevada border. Herd size has declined significantly (>70%) from historical peak levels, likely due to habitat loss and vehicle collisions. A large increase in housing development and traffic along the Highway 395 corridor during the past 20 years has contributed to population declines for this herd. Significant barriers include fencing along Carson River and outlying suburban areas in Carson City, Minden, and Gardnerville, Nevada. These data provide the location of migration corridors for mule deer (Odocoileus hemionus) in the Carson River population in California...
thumbnail
The timing of biological events in plants and animals, such as migration and reproduction, is shifting due to climate change. Anadromous fishes are particularly susceptible to these shifts, as they are subject to strong seasonal cycles when transitioning between marine and freshwater habitats to spawn. We used linear models to determine the extent of phenological shifts in adult alewife (Alosa pseudoharengus) as they migrated from ocean to freshwater environments during spring to spawn at 12 sites along the northeast U.S. We also evaluated broad-scale oceanic and atmospheric drivers that trigger their movements from offshore to inland habitats including sea surface temperature (SST), North Atlantic Oscillation index,...
The Lower Colorado River provides critical riparian areas in an otherwise arid region and is an important stopover site for migrating landbirds. In order to reverse ongoing habitat degradation due to drought and human-altered hydrology, a pulse flow was released from Morelos Dam in spring of 2014, which brought surface flow to dry stretches of the Colorado River in Mexico. To assess the potential effects of habitat modification resulting from the pulse flow, we used foraging behavior of spring migrants from past and current studies to assess the relative importance of different riparian habitats. We observed foraging birds in 2000 and 2014 at five riparian sites along the Lower Colorado River in Mexico to quantify...
Little is known regarding the migratory behavior of bats, due in part to their elusive nature. Recently, however, fatalities of migratory bats at some wind energy facilities across North America have provided the opportunity and impetus to study bat migration at the landscape level. Using acoustic monitoring and carcass searches, we examined variation in activity levels and fatality rates of bats across southern Alberta, Canada, to determine if bat activity and fatality are concentrated in certain areas or evenly distributed across the landscape. To investigate geographical variation in bat activity, we acoustically monitored activity from 15 July to 15 September 2006 and 2007 at 7 proposed or existing wind energy...
thumbnail
This dataset represents a modeling effort intended to explore the impacts of oiling on migratory birds. The purpose of this model is to provide a first principles approach to predict potential biological impacts of altered energetics dynamics in north American migratory birds due to oiling of feathers. This data includes predicted theoretical impacts on migration timing, wintering latitude, starvation rates, and increased food uptake. This data was generated through model implementation in R (R Core Team 2020; Version 4.0.4).
The Verdi-Truckee mule deer (Odocoileus hemionus) herd winters south of I-80 in the Carson Range along the California-Nevada border, although a portion of this herd winters northeast of Verdi, Nevada on Peavine Mountain. Migration routes to summer range follow I-80 southwest, along both sides of the Truckee River, toward Martis Valley and Truckee, California. The summer range for this small herd (approximately 500 animals in 2019) is located east of Truckee and includes portions of Juniper Flat, Martis Creek, and the area south of the Truckee River to the confluence of Gray Creek. Migration behavior and timing of migration is dependent on seasonal weather conditions and snow depth during early winter. Significant...
The Verdi-Truckee mule deer (Odocoileus hemionus) herd winters south of I-80 in the Carson Range along the California-Nevada border, although a portion of this herd winters northeast of Verdi, Nevada on Peavine Mountain. Migration routes to summer range follow I-80 southwest, along both sides of the Truckee River, toward Martis Valley and Truckee, California. The summer range for this small herd (approximately 500 animals in 2019) is located east of Truckee and includes portions of Juniper Flat, Martis Creek, and the area south of the Truckee River to the confluence of Gray Creek. Migration behavior and timing of migration is dependent on seasonal weather conditions and snow depth during early winter. Significant...
The Loyalton mule deer (Odocoileus hemionus) herd winters west and northwest of Reno, Nevada along the California-Nevada border, extending into the Peterson Mountains, east of Highway 395 in Nevada. A portion of the herd also winters north of I-80 on Peavine Mountain in Nevada. This population represents an interstate migratory herd but also contains year-round residents in both states. Deer migrate southwest into the Sierra Nevada Mountains of California on both sides of Highway 89 from Truckee to Sierraville, mostly staying north of I-80 and into the Tahoe National Forest. Significant challenges include urban development, vehicle collisions on Highways 89, 395, and I80, and large-scale wildfires that have burned...
The Egg Lake Rocky Mountain elk (Cervus canadensis nelsoni) sub-herd range extends northeast from the town of McCloud around Ash Creek to the Big Valley Mountains and as far east as Highway 139 near the community of Hackamore. During the winter, this sub-herd primarily resides to the east of Big Valley Mountains near Egg Lake in Modoc County, California. They migrate east to private timberlands and spend the spring and summer just outside of McCloud, California. Topography of this area is relatively flat, but gradually transitions to steeper slopes around creeks, and typical habitat includes Ponderosa pine (Pinus ponderosa), Sierran mixed conifer, and montane hardwood conifer forests. Another sub-herd is known to...
The elk (Cervus canadensis) of the Jemez herd reside primarily in and around the Valles Caldera National Preserve, west of Los Alamos, NM and along the mesa tops to the north and west of the Valles Caldera. The area has experienced two wildfires, the stand replacing Las Conchas Fire and the mixed severity Thompson Ridge fire, within the last decade, burning a total of 180,555 acres. The data used in this report was collected to examine the responses of elk to these wildfires and forest restoration treatments. The Jemez herd is only partially migratory, with residents that consistently remain on the Valles Caldera and individuals that travel to the surrounding lower elevation slopes depending on the year and snowpack...
The mule deer (Odocoileus hemionus) of the Jemez Springs herd winter in the southwestern Jemez Mountains, south and east of the town of Jemez Springs. The area has experienced two severe wildfires, the Las Conchas and Thompson Ridge fires, within the last decade, burning a total of 180,555 acres. The data used in this report was collected to examine the responses of mule deer to these wildfires and forest restoration treatments. The winter range is located among the foothills of the Jemez Mountains, consisting primarily of pinyon-juniper woodlands. Individuals migrated an average of 26.1 miles, either to the western edge of the Jemez Mountains, near Blue Bird Mesa, or to the Valles Caldera. The central migration...
Migratory mule deer (Odocoileus hemionus) within the San Joaquin Watershed occupy most of the watershed above Kerckhoff Reservoir, Fresno and Madera Counties, California. Human infrastructure in the watershed is widespread and includes residential, water control, hydroelectric power, and recreational use developments. Steep topography between winter and summer range limit crossing points along the San Joaquin River. Habitat conditions favoring deer declined from a peak around 1950, resulting in a reduction in the deer population. The current deer population is believed to be about 4,000. A massive wildfire burned through most of the watershed in 2020, dramatically changing habitat conditions in some areas. These...
The Jawbone Ridge mule deer (Odocoileus hemionus) herd is a sub-herd of the Tuolumne herd, which migrate to the Jawbone Ridge flats in the winter in Tuolumne, Mariposa, and Alpine Counties. Additionally, a small sample of deer were captured from the Yosemite herd to determine herd overlap. GPS collars were normally set to take a location every 7 hours, and emit a signal Monday through Friday, 9am to 5pm. Some GPS collars were set to take a location fix every hour during periods of time when deer were thought to be migrating (May and November). The most important portion of the winter range is the Jawbone ridge flats, situated at an elevation of 4,000 feet. Deer migrate from here east into the high Sierra Nevada...
The North of Interstate 40 Pronghorn herd primarily resides in Arizona’s Game Management Unit (GMU) 7. GMU 7 had an estimated population of 550 pronghorn in 2019. The Pronghorn North of Interstate 40 summer in high elevation open meadows and ponderosa pine habitat near Government Prairie. When winter conditions set in the pronghorn (Antilocapra americana) seek lower elevations, migrating through mixed pinyon-juniper woodlands to open grassland and shrub habitats north of Sitgreaves Mountain, often crossing US Highway 180 (US-180) towards Antelope Flat. US-180 is an increasing threat to this migration corridor as traffic volumes rise. However, right-of-way fence improvements and relatively low traffic volumes on...
thumbnail
Capacity to prioritize barrier removals in the Great Lakes basin is currently limited by lack of data on the passability of road crossings and dams for both unwanted invasive species and desirable native migratory fishes. Building upon our initial barrier inventory, this project has two key elements. First, we are testing whether our landscape statistical models accurately predict the upstream limits of fish migrations along the Wisconsin coast of Lake Michigan. This involves intensive field work to determine the actual upstream limits of suckers, pike, and steelhead during the spring migration. Second, we are collecting systematic data on the size and condition of dams throughout the Lake Michigan basin. These...
Mule deer of the Kaibab North herd on the Kaibab Plateau are treasured for their historic and contemporary significance in North America. They are the densest population of mule deer in Arizona, with an estimate of 10,200 individuals in 2019. This report compiles two research efforts, the first completed by Arizona Game and Fish Department in 2014, and the second from Utah Division of Wildlife’s ongoing research started in 2017. The Kaibab Plateau is bound on the east, south, and west by vertical canyon walls which run along the Colorado River and Kanab Creek. The Kaibab North Deer herd winters among pinyon-juniper, sagebrush, and cliffrose landscapes along the west, east, and northern extents of the plateau. Portions...
map background search result map search result map Field Assessments of Great Lakes Barriers Migration Routes of Mule Deer in the Kaibab North Herd in Arizona Migration Corridors of Mule Deer in the Upper San Joaquin Watershed Herd in California Migration Routes of Mule Deer in the Upper San Joaquin Watershed Herd in California Migration Stopovers of Elk in the East Shasta Valley Herd in California Migration Routes of Elk in the Egg Lake Herd in California Migration Stopovers of Elk in the West Goose Lake Herd in California Migration Routes of Elk in the Jemez Herd in New Mexico Migration Corridors of Mule Deer in the Carson River Herd in California and Nevada Migration Corridors of Mule Deer in the Jawbone Ridge Herd in California Migration Routes of Mule Deer in the Loyalton Herd in California and Nevada Migration Corridors of Mule Deer in the Verdi-Truckee Herd in California and Nevada Migration Routes of Mule Deer in the Verdi-Truckee Herd in California and Nevada Migration Routes of Mule Deer in the Jemez Springs Herd in New Mexico Migration Routes of Pronghorn in the North of Interstate 40 Herd in Arizona Simulated impacts of feather oiling on avian energetics and migration: R environment model code and raw output Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18 Massachusetts River Herring Daily Counts and Environmental data Simulated impacts of feather oiling on avian energetics and migration: R environment model code and raw output Migration Routes of Elk in the Jemez Herd in New Mexico Migration Routes of Mule Deer in the Jemez Springs Herd in New Mexico Migration Routes of Mule Deer in the Verdi-Truckee Herd in California and Nevada Migration Corridors of Mule Deer in the Verdi-Truckee Herd in California and Nevada Migration Routes of Pronghorn in the North of Interstate 40 Herd in Arizona Migration Routes of Mule Deer in the Upper San Joaquin Watershed Herd in California Migration Corridors of Mule Deer in the Upper San Joaquin Watershed Herd in California Migration Routes of Elk in the Egg Lake Herd in California Migration Stopovers of Elk in the East Shasta Valley Herd in California Migration Routes of Mule Deer in the Loyalton Herd in California and Nevada Migration Routes of Mule Deer in the Kaibab North Herd in Arizona Migration Stopovers of Elk in the West Goose Lake Herd in California Migration Corridors of Mule Deer in the Carson River Herd in California and Nevada Migration Corridors of Mule Deer in the Jawbone Ridge Herd in California Massachusetts River Herring Daily Counts and Environmental data Microchemistry demographics and development data from wild caught black carp in the Mississippi River basin, 2011-18 Field Assessments of Great Lakes Barriers