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29 record(s) found.

Data Release Capture-mark-recapture data for Oregon spotted frogs [Rana pretiosa] along the Deschutes River, Oregon, 2016-2019
Authors: Jennifer C Rowe; Adam Duarte; Christopher A Pearl; Brome McCreary; P K Haggerty; Michael J Adams
Date: 2021-06-04 | Outlet: Ecosphere, v. 12, no. 6, p. e03634
Altered flow regimes can contribute to dissociation between life history strategies and environmental conditions, leading to reduced persistence reported for many wildlife populations inhabiting regulated rivers. The Oregon spotted frog [Rana pretiosa] is a threatened species occurring in floodplains, ponds, and wetlands in the Pacific Northwest with a core range in Oregon, USA. All life stages of [R. pretiosa] are reliant on aquatic habitats, and inundation patterns across the phenological timeline can have implications for population success. We conducted capture–mark–recapture (CMR) sampling of adult and subadult [R. pretiosa] at three sites along the Deschutes River downstream from two dams that regulate flows. We related the seasonal extent of inundated habitat at each site to monthly survival probabilities using a robust design CMR model. We also developed matrix projection models to simulate population dynamics into the future under current river flows. Monthly survival was strongly associated with the extent and variability of inundated habitat, suggesting some within-season fluctuations at higher water levels could be beneficial. Seasonal survival was lowest in the winter for all three sites, owing to limited water availability and the greater number of months within this season relative to other seasons. Population growth for the two river-connected sites was most strongly linked to adult survival, whereas population growth at the river-disconnected site was most strongly tied to survival in juvenile stages. This research identifies population effects of seasonally limited water and highlights conservation potential of enhancing survival of particularly influential life stages.
Data Release Chiricahua leopard frog - Arizona: influence of landscape features on landscape resistance and colonization dynamics (presence data, wind speed, air temp; hydroperiod spatial coordinates)
Authors: Erin L Muths; P E Howell; Blake R Hossack; J Chandler
Outlet: Figshare
Data used in the manuscript presenting a novel spatially explicit modeling framework for narrowing the divide between these disciplines to advance understanding of the effects of landscape structure on metapopulation dynamics.
Data Release complex ecological relationships-boreal toads-disease
Authors: Erin L Muths; Brittany A Mosher; Kathryn P Huyvaert; Larissa L Bailey
Outlet: Dryad
Data used in manuscript that examines several potential factors influencing disease dynamics in the boreal toad–disease system: geographic isolation of populations, amphibian community richness, elevational differences, and habitat permanence.
Data Release Chorus frog density and population growth, Cameron Pass, Colorado, 1986-2020
Authors: Erin L Muths
Outlet: USGS
Data used in Bayesian formulation of an open population capture-recapture model with >30 years of data to examine intrinsic and extrinsic factors regulating two populations of adult boreal chorus frogs (Pseudacris maculata).
Data Release Effects of Snowpack, Temperature, and Disease on Demography in a Wild Population of Amphibians
Authors: Erin L Muths
Outlet: USGS
Data used in an assessment of the effects of snowpack, temperature and disease on demography in boreal toads in Wyoming.
Data Release Handling times: tagging vs photos, Boreal toads in WY/CO 2020
Authors: Erin L Muths
Outlet: USGS
comparison of handling times - PIT (passive integrated transponder) tagging versus photography for boreal toads in Wyoming and Colorado
Data Release Hatching success, survival, size and development, and behavioral data for two amphibian species exposed to NaCl and energy-related saline wastewaters
Authors: B J Tornabene; Creagh W Breuner; Blake R Hossack
Date: 2021-09-24 | Outlet: figshare
We investigated the relative effects of NaCl and energy-related saline wastewaters on hatching success, survival, size and development, and behaviors of northern leopard frogs ([i]Rana pipiens[/i]) and boreal chorus frogs ([i]Pseudacris maculata[/i]). Eggs were exposed and responses were tracked through hatching for 24 days. Five datasets are included. (1) Includes hatching and survival data for leopard frog eggs and larvae. (2) Includes hatching and survival data for chorus frog eggs and larvae. (3) Includes behavioral responses of both species monitored daily from day 9–24. (4) Includes morphology measurements from larval leopard frogs taken at the end of the experiment on day 24. (5) Includes morphology measurements from larval leopard frogs taken at the end of the experiment on day 24.
Data Release Larval amphibian and site-water corticosterone, and site attributes, from wetlands affected by energy-related saline wastewaters
Authors: B J Tornabene; Blake R Hossack; E J Crespi; Creagh W Breuner
Date: 2021-09-24 | Outlet: figshare
We investigated the influence of salinity from energy-related saline wastewaters on CORT of three larval amphibians (Tiger salamanders, Leopard frogs, and Chorus frogs) in Montana and North Dakota where wastewater contamination is pervasive. We measured baseline and stress-induced CORT (pg/h) of amphibians exposed to a gradient of wastewaters using a novel, noninvasive technique. We also measured background corticosterone in site water in 2017 and 2018, and evaluated variance within and among wetlands in 2019. Three datasets are included. (1) Includes corticosterone and morphology measurements from larval amphibians taken in 2017 and 2018. (2) Includes background corticosterone measurements and attributes from sites in 2017–2019. (3) Includes background corticosterone measurements for 5 points along the perimeter of 6 sites in 2019 to evaluate variance within and among wetlands.
Data Release Occurrence of amphibians in Northern California Coastal Dune Drainages
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2017-08-22 | Outlet: USGS - Science Base
Many coastal dune ecosystems have been degraded by non-native dune vegetation, but these systems might still provide valuable habitat for some taxa, including amphibians. Because restoration of degraded dune systems is occurring and likely to continue, we examined the occurrence of amphibians in drainages associated with a coastal dune ecosystem degraded by invasive plants (European Beachgrass, Ammophila arenaria, and Iceplant, Carpobrotus edulis). We found that occupancy of three amphibian species (California Red-legged Frog, Rana draytonii; sierran treefrog, Pseudacris sierra; and Rough-skinned Newt, Taricha granulosa) among 21 coastal dune drainages was high, with most coastal dune drainages occupied by all three species. Furthermore, reproduction of Sierran Treefrogs and California Red-legged Frogs was estimated to occur in approximately half and one-third of the drainages, respectively. The probability of occurrence of Rough-skinned Newts and pre-metamorphic life stages of both anurans decreased during the study, perhaps because of ongoing drought in California or precipitation-induced changes in phenology during the final year of the study. Maintaining structural cover and moist features during dune restoration will likely benefit native amphibian populations inhabiting coastal dune ecosystems.
Data Release Time to detection data for Point Reyes pond-breeding amphibians, 2017
Authors: Brian J Halstead; Patrick M Kleeman; Jonathan P Rose
Date: 2018-12-14 | Outlet: USGS - Science Base
Occupancy models provide a reliable method of estimating species distributions while accounting for imperfect detectability. The cost of accounting for false absences is that detection and nondetection surveys typically require repeated visits to a site or multiple-observer techniques. More efficient methods of collecting data to estimate detection probabilities would allow additional sites to be surveyed for the same amount of effort, which would support more precise estimation of covariate effects to improve inference about underlying ecological processes. Time-to-detection surveys allow the estimation of detection probability based on a single site visit by one observer, and therefore might be an efficient technique for herpetological occupancy studies. We evaluated the use of time-to-detection surveys to estimate the occupancy of pond-breeding amphibians at Point Reyes National Seashore, California, USA, including variables that affected detection rates and the probability of occurrence. We found that detection times were short enough, and occupancy was high enough, to reliably estimate the probability of occurrence of three pond-breeding amphibians at Point Reyes National Seashore, and that survey and site conditions had species-specific effects on detection rates. In particular, pond characteristics affected detection times of all commonly detected species. Probability of occurrence of Sierran Treefrogs (Hyliola sierra) and Rough-skinned Newts (Taricha granulosa) was negatively related to the detection of fish and pond area. Time-to-detection surveys can provide an efficient method for estimating detection probabilities and accounting for false absences in occupancy studies of reptiles and amphibians.
Data Release Shasta Salamanders Surveys for the Shasta-Trinity National Forest (ver. 2.0, July 2020)
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2019-11-26 | Outlet: USGS - Science Base
The Shasta salamander (Hydromantes shastae) has been petitioned for listing under the Endangered Species Act. The greatest threat to the species is likely habitat loss that will be caused by the increase in elevation of Shasta Lake that will occur with proposed increases in the height of Shasta Dam to increase water storage capacity and maintain cold water for Chinook salmon (Oncorhynchus tshawytscha). Another potential threat is the fungus Batrachochytrium salamandrivorans, which has not yet been detected in North America but is lethal to related salamanders (Hydromantes strinatii) in Europe (Martel et al. 2014). In addition to these threats, recent genetic evidence suggests that the species as originally petitioned consists of three distinct species: H. shastae, H. samweli, and H. wintu (Bingham et al. 2018). Herein, we treat the species complex as a single entity because of difficulty distinguishing among the different species in the field. Recent work has increased knowledge about the habitat types within which Shasta salamanders can be found to include volcanic rock outcrops and areas of mature forest with scattered rocks, but no outcrops (Nauman and Olson 2004). To our knowledge, however, surveys to date have not accounted for the possibility of false absences, though Nauman and Olson (2004) used reference sites to ensure that Shasta salamanders were available on the surface to be detected. Systematic surveys that quantify and account for detection probabilities are needed to distinguish between true and false absences and their results would contribute information about habitat suitability and the distribution of the species. This information is vital to estimate what portion of the species complex would be lost to inundation when the elevation of Shasta Lake is raised and to identify potential refugia or recipient sites for translocations.
Data Release Site and Survey Data for Amphibian Surveys in Yosemite National Park, 2018
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2020-11-19 | Outlet: USGS - Science Base
These data represent occupancy surveys conducted in long-term monitoring sites in Yosemite National Park in 2018 for three anurans, the Yosemite Toad (Anaxyrus canorus), the Sierran Treefrog (Pseudacris sierra), and the Sierra Nevada Yellow-legged Frog (Rana sierrae). The data include independent double-observer surveys and time-to-detection data to calculate detection probabilities and account for false negatives, or the failure to detect a species at a site where it occurs.
Data Release Site and Survey Data for Dixie Valley Toads in Churchill County, Nevada, 2019
Authors: Brian J Halstead; Patrick M Kleeman
Date: 2020-11-19 | Outlet: USGS - Science Base
These data include site- and survey-specific information for occupancy surveys of Dixie Valley Toads (Anaxyrus williamsi) collected in the Dixie Valley, Churchill County, Nevada, in May 2019. The data include both multiple surveys of the same sites and time-to-detection information to quantify detection probabilities and account for imperfect detection in assessments of Dixie Valley Toad occupancy.
Data Release Data realease for manuscript: A statistical forecasting approach to metapopulation viability analysis
Authors: P E Howell; Blake R Hossack; Erin L Muths; Brent H Sigafus; A Chenevert-Steffler; R B Chandler
Date: 2020 | Outlet: Ecological Applications 2020: e02038
Data release and code for Ecological Applications paper: A statistical forecasting approach to metapopulation viability analysis
Data Release North Coast and Cascades Network consolidated amphibian database (1984-2005)
Authors: Stephanie K Galvan; Michael J Adams; B Samora; S E Stonum; P J Happe; R S Glesne; A Rawhouser
Date: 2020-10-20
This data set is an amalgamation of twenty-nine original data sets, which represent amphibian surveys in the seven national parks comprising the North Coast and Cascades Network (NCCN) of the National Park Service. The data were collected from 1984-2005, and include the localities of 19 species of amphibians at various life stages, 18 native to the Pacific Northwest and one invasive species
Data Release Data from visual encounter and acoustic monitoring surveys targeting amphibians and reptiles in Big Thicket National Preserve in southeast Texas from August 2010 to September 2018
Authors: Brad M Glorioso; J Hardin Waddle
Date: 2020-08-07
This dataset contains data from visual encounter and acoustic surveys in Big Thicket National Preserve in Texas from August 2010 to September 2018. This dataset also includes salinity measurements from nine salinity loggers deployed in the study area.
Data Release Oregon spotted frog (Rana pretiosa) monitoring data for metademographic analysis 2010-2018, Oregon: U.S. Geological Survey Data Release
Authors: Jennifer C Rowe; Adam Duarte; James T Peterson; Christopher A Pearl; Brome McCreary; Stephanie K Galvan; Michael J Adams
Date: 2020-05-05 | Outlet: ScienceBase
This dataset contains information from surveys conducted 2010-2018 by USGS as part of a long-term Oregon spotted frog monitoring effort in the central Oregon range. Data consist of site, survey, habitat, and species detection covariates, as well as inter-site distance measurements.
Data Release Bd and Bsal Prevalence in Gulf Coast waterdogs captured from St. Tammany Parish, Louisiana, in 2015
Authors: Brad M Glorioso; J Hardin Waddle
Date: 2017-06-22
The dataset includes information on all 76 Gulf Coast waterdogs captured including sex and size information along with the results of the tests for the two fungal pathogens.
Data Release Data from a national survey for the amphibian chytrid fungus Batrachochytrium salamandrivorans
Authors: J Hardin Waddle; D A Grear; Brad M Glorioso; Adam R Backlin; William J Barichivich; Adrianne B Brand; Daniel L Calhoun; Jill Fleming; A Dietrich; Patrick M Kleeman; M A Cruz
Date: 2019-05-22
This dataset provides the results of a national survey of the conterminous U.S. for the salamander chytrid fungus Batrachochytrium salamandrivorans (Bsal) conducted by the U.S. Geological Survey Amphibian Research and Monitoring Initiative from May 2014 to August 2017. Sites were sampled by capturing amphibians by hand or by traps or nets that were then swabbed individually using methods that prevent sample contamination. All swabs were then analyzed using a real-time TaqMan PCR for detection of B. salamandrivorans on the extracted DNA. The data consist of locality information and data on the individual sampled, as well as the result of the test for B. salamandrivorans. No cases of B. salamandrivorans were detected in this study.
Data Release Data from a turtle trapping effort at a release site of head-started alligator snapping turtles, Macrochelys temminckii, in southwest Louisiana in 2018
Authors: Brad M Glorioso; Charles D Battaglia; J Streeter; J Hardin Waddle
Date: 2020-05-01
This dataset contains initial data from head-started alligator snapping turtles released by Louisiana Department of Wildlife and Fisheries (LDWF) from November 2015 to October 2016. In addition, it contains data from a five-day trapping effort at each of seven release sites by the United States Geological Survey (USGS) from late June to early October 2018. Trapping was completed using hoop nets of three sizes. We recaptured eight head-started alligator snapping turtles as well as four individuals native to the creek.