A5006856746- Turtle Biology and Conservation
- Wildlife Ecology and Conservation
- Amphibian and Reptile Biology
- Fish Ecology and Management Studies
- Avian ecology and behavior
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Marine and fisheries research
- Wildlife-Road Interactions and Conservation
- Marine animal studies overview
- Environmental DNA in Biodiversity Studies
- Physiological and biochemical adaptations
- Wildlife Conservation and Criminology Analyses
- Rabies epidemiology and control
- Oceanographic and Atmospheric Processes
- Isotope Analysis in Ecology
- Primate Behavior and Ecology
- UAV Applications and Optimization
- Reproductive biology and impacts on aquatic species
- Insect and Arachnid Ecology and Behavior
- Animal Virus Infections Studies
- Environmental and Cultural Studies in Latin America and Beyond
- Rangeland and Wildlife Management
- Smart Materials for Construction
- Social Acceptance of Renewable Energy
Washington Department of Fish and Wildlife
2020-2023
University of California, Davis
2012-2020
Astrogeology Science Center
2012-2015
United States Geological Survey
2012-2015
University of Kentucky
2013-2015
Southwest Biological Science Center
2012-2015
San Diego State University
2012
University of Tennessee at Knoxville
2012
Central Washington University
2012
Of the 356 species of turtles worldwide, approximately 61% are threatened or already extinct. Turtles among most major groups vertebrates, in general, more so than birds, mammals, fishes even much besieged amphibians. Reasons for dire situation worldwide include familiar list impacts to other including habitat destruction, unsustainable overexploitation pets and food, climate change (many have environmental sex determination). Two notable characteristics pre-Anthropocene were their massive...
While demographic changes in short-lived species may be observed relatively quickly response to climate changes, measuring population responses of long-lived requires long-term studies that are not always available. We analyzed data from a threatened Agassiz's desert tortoises (Gopherus agassizii) at 2.59 km2 study plot the Sonoran Desert ecosystem Joshua Tree National Park, California, USA 1978 2012 examine variation apparent survival and demography this species. Transect-based,...
Abstract Despite the trade-offs between renewable energy development, land use, humans, and wildlife, wind solar development continues to transform western US into a green landscape. While reduces carbon emissions reliance on fossil fuels, many studies have emerged associated ecological social impacts of this technology. Here, we review current state knowledge nexus wildlife conservation in since 2010. We revisit pertinent concepts presented earlier reviews assess how far field has...
The attainment of sexual maturity has been shown to affect measures size dimorphism (SSD) and adult sex ratios in several groups vertebrates. Using data for turtles, we tested the model that are expected be male-biased when females larger than males female-biased because relationship each with maturity. Our is based on premise earlier-maturing remains smaller, average throughout life, predominates numerically unless sexes strongly affected by differential mortality, emigration, immigration,...
Bet-hedging theory makes the counter-intuitive prediction that, if juvenile survival is low and unpredictable, organisms should consistently reduce short-term reproductive output to minimize risk of failure in long-term. We investigated long-term an Agassiz's desert tortoise (Gopherus agassizii) population conformance a bet-hedging strategy reproduction unpredictable but comparatively productive environment. Most females reproduced every year, even during periods precipitation poor...
ABSTRACT There is little information on predator–prey interactions in wind energy landscapes North America, especially among terrestrial vertebrates. Here, we evaluated how proximity to roads and turbines affect mesocarnivore visitation with desert tortoises ( Gopherus agassizii ) their burrows a landscape. In 2013, placed motion‐sensor cameras facing the entrances of 46 active tortoise 5.2‐km 2 facility near Palm Springs, California, USA. Cameras recorded images 35 species reptiles,...
Abstract Fecundity is an important demographic parameter that contributes to the productivity of anadromous fish stock dynamics. Yet, studies on fecundity patterns in Pacific salmon ( Oncorhynchus spp.) often only include a few years data, limiting our ability understand spatio‐temporal trends. Here, we used data 43 hatchery Chinook O . tshawytscha , Salmonidae) populations Washington State evaluate whether average changed over past three decades. We then from subset stocks (18) relationship...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 19:63-74 (2012) - DOI: https://doi.org/10.3354/esr00463 Climatic variation affects clutch phenology in Agassiz's desert tortoise Gopherus agassizii Jeff Lovich1,*, Mickey Agha1, Meaghan Meulblok1, Kathie Meyer2, Josh Ennen1,4, Caleb Loughran1,5, Sheila Madrak1,6, Curtis Bjurlin3 1U.S. Geological Survey, Southwest...
DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 124:91-100 (2017) - DOI: https://doi.org/10.3354/dao03122 Mass mortality eastern box turtles with upper respiratory disease following atypical cold weather Mickey Agha1,*, Steven J. Price2, A. Justin Nowakowski1, Ben Augustine3, Brian D. Todd1 1Department Wildlife, Fish, and Conservation Biology, University...
Abstract Sexual size dimorphism (SSD) is a well‐documented phenomenon in both plants and animals; however, the ecological evolutionary mechanisms that drive maintain SSD patterns across geographic space at regional global scales are understudied, especially for reptiles. Our goal was to examine variation of turtle explore environmental correlates using phylogenetic comparative methods. We use published body data on 135 species from nine families how evolution influenced by habitat...
Our study represents the first attempt to describe biogeographic provinces for North American (México, United States, and Canada) turtles. We analyzed three nested data sets separately: (1) all turtles, (2) freshwater (3) aquatic georeferenced turtle distributions, then we created presence–absence matrices each of sets. used watershed unit as units. conducted an unweighted pair-group method with arithmetic mean clustering analysis on Jaccard index distance matrix from our species delineate...
Our study investigates how factors, such as latitude, productivity, and several environmental variables, influence contemporary patterns of the species richness in North American turtles. In particular, we test hypotheses explaining broad-scale on data sets: (i) total turtles, (ii) freshwater turtles only, (iii) aquatic (iv) terrestrial (v) Emydidae, (vi) Kinosternidae. addition to spatial data, used a combination 25 abiotic variables regression models predict patterns. results provide...
Abstract We compared egg size phenotypes and tested several predictions from the optimal (OES) bet‐hedging theories in two North American desert‐dwelling sister tortoise taxa, Gopherus agassizii G. morafkai , that inhabit different climate spaces: relatively unpredictable more predictable spaces, respectively. Observed patterns both species differed of OES ways. Mean increased with maternal body species. was inversely related to clutch order a strategy consistent within‐generation hypothesis...
We observed behavior consistent with nest-guarding in Agassiz's desert tortoise (Gopherus agassizii) at two nests a large wind-energy-generation facility near Palm Springs, California, locally known as the Mesa Wind Farm. As researchers approached nests, female tortoises moved to entrance of their burrows and positioned themselves sideways, directly over nests. One stretched her limbs outward wedged herself into burrow (her plastron above nest). Guarding is rarely but can occur result...
Areas of significant topographic relief often form ecoclines, resulting in stratified life zones each with distinct communities plants and animals (Attrill Rundle 2002).Contact zones, or ecological boundaries along allow unique plant animal assemblages that are not normally considered to be syntopic, mix varying degrees.The ecoclines thus both spatial when these crossed interactions can occur, including unexpected predator prey interactions.The eastern San Bernardino Mountains southern...