A5066360531- Turtle Biology and Conservation
- Ichthyology and Marine Biology
- Marine animal studies overview
- Amphibian and Reptile Biology
- Fish Ecology and Management Studies
- Avian ecology and behavior
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Bird parasitology and diseases
- Fish biology, ecology, and behavior
- Marine Ecology and Invasive Species
- Visual perception and processing mechanisms
- Underwater Vehicles and Communication Systems
- Wildlife Ecology and Conservation
- Environmental DNA in Biodiversity Studies
- Marine and coastal plant biology
- Experimental and Theoretical Physics Studies
- Bone Tumor Diagnosis and Treatments
- Non-Invasive Vital Sign Monitoring
- Food Industry and Aquatic Biology
- Infrared Thermography in Medicine
- Coastal and Marine Management
- Cruise Tourism Development and Management
- Wildlife Conservation and Criminology Analyses
- Environmental Conservation and Management
California State University, Monterey Bay
2018-2024
Pacific University
2008-2023
Stanford University
2008-2023
Smithsonian Marine Station
2023
Indiana University – Purdue University Fort Wayne
2017-2018
The Ocean Foundation
2013-2017
Ocean Medical Center
2012
American University
2010
Ames Research Center
1972-1975
University of Michigan
1971-1973
Effective transboundary conservation of highly migratory marine animals requires international management cooperation as well clear scientific information about habitat use by these species. Populations leatherback turtles (Dermochelys coriacea) in the eastern Pacific have declined >90% during past two decades, primarily due to unsustainable egg harvest and fisheries bycatch mortality. While research efforts on nesting beaches are ongoing, relatively little is known this population...
The United Nations are currently negotiating a new international legally-binding instrument to govern the global ocean commons, vast area beyond national jurisdiction (ABNJ) owned by everyone but not cared for any single entity. Indigenous Peoples and local communities (IPLCs) have been underrepresented in debate about governance of ABNJ despite their internationally recognized rights role as custodians many globally-significant migratory species that travel between coasts high seas. Here we...
Interactions with fisheries are believed to be a major cause of mortality for adult leatherback turtles ( Dermochelys coriacea ), which is particular concern in the Pacific Ocean, where they have been rapidly declining. In order identify these interactions occurring and how may reduced, it essential first understand movements behavior turtles. There two regional nesting populations East (EP) West (WP), comprising multiple sites. We synthesized tracking data from compared their movement...
Foraging success for pelagic vertebrates may be revealed by horizontal and vertical movement patterns. We show markedly different patterns leatherback turtles in the North Atlantic versus Eastern Pacific, which feed on gelatinous zooplankton that are only occasionally found high densities. In Atlantic, travel speed was characterized two modes, indicative of foraging at low speeds (<15 km d−1) transit (20–45 d−1). Only a single mode evident occurred 21 d−1 transit. The mean dive depth more...
Fisheries bycatch is a critical source of mortality for rapidly declining populations leatherback turtles, Dermochelys coriacea. We integrated use-intensity distributions 135 satellite-tracked adult turtles with longline fishing effort to estimate predicted risk over space and time in the Pacific Ocean. Areas did not overlap eastern western nesting populations, warranting their consideration as distinct management units respect fisheries bycatch. For we identified several areas high north...
Migratory species and straddling populations, including highly mobile fish, elasmobranchs, sea turtles, seabirds, marine mammals, are increasingly impacted by overexploitation, fisheries bycatch, habitat degradation, climate change. Conserving these sustainably managing other human activities present one of the most complex challenges in contemporaneous multilateral governance. Effective conservation management efforts require harmonizing data collection, sustainable harvesting practices,...
So little is known about the early life history of leatherback turtles ( Dermochelys coriacea ) from hatchling to adulthood that this period has been termed ‘lost years’. For critically endangered eastern Pacific populations, continued and rapid declines underscore urgent need develop conservation strategies across all stages. We investigate dispersal four Mesoamerican nesting beaches using passive tracer experiments within a regional ocean modelling system. The evolution distribution each...
Abstract Species distribution models have been widely used in both terrestrial and marine systems, applications included invasive species management, evaluating potential effects of climate change, conservation. Generally, only a single type data can be accommodated within the model structures used, which may lead to higher uncertainty predictions when are sparse. In this case, it beneficial pool from multiple sources types, such as fishery observations telemetry data. An integrated (ISDM)...
Abstract The utilization and capabilities of biotelemetry are expanding enormously as technology access rapidly improve. These large, correlated datasets pose statistical challenges requiring advanced techniques to appropriately interpret model animal movement. We used satellite telemetry data critically endangered Eastern Pacific leatherback turtles ( Dermochelys coriacea ) develop a habitat‐based their motility (and conversely residence time) using hierarchical Bayesian framework, which...
After hatching, sea turtles leave the nest and disperse into ocean. Many years later, they return to their natal coastlines. The period between leaving returning areas, known as “Lost Years”, is poorly understood. Satellite tracking studies aimed at studying Years” are challenging due small size prolonged dispersal phases of young individuals. Here, we summarize preliminary findings about performance prototype microsatellite tags deployed over a three-year on 160 neonate juvenile from four...
The East Pacific (EP) leatherback population is listed by the IUCN Red List of Threatened species as Critically Endangered. Despite conservation efforts, mainly focused around nesting areas, its has declined over 90% since 1980s. major current threat fisheries bycatch, but impact been primary documented within South American migration and foraging habitats, with scarce information from or interesting areas. To assess small-scale on EP leatherbacks inhabiting waters north equator we conducted...
Abstract The Eastern Pacific leatherback turtle population ( Dermochelys coriacea ) has declined precipitously in recent years. One of the major causes is bycatch from coastal and pelagic fisheries. Fisheries observations are often underutilized, despite strong potential for this data to affect policy. In study, we created a spatiotemporal species distribution model that synthesizes fisheries with remotely sensed environmental data. will be developed into dynamic management tool population....
The Northwest Atlantic (NWA) leatherback turtle ( Dermochelys coriacea ) subpopulation was recently classified as endangered. It nests in the Wider Caribbean Region and includes five genetic stocks, all declining, albeit at different rates. causes of decline are multiple difficult to identify based on annual nest counts which integrate effects stressors over entire life history. Demographic models, however, show that survival during juvenile pelagic stage is main factor modulating population...
Abstract Vertical movements can expose individuals to rapid changes in physical and trophic environments—for aquatic fauna, dive profiles from biotelemetry data be used quantify categorize vertical movements. Inferences on classes of movement typically rely subjective summaries parameters or statistical clustering techniques that utilize Euclidean matching with observation points. These approaches are prone subjectivity, error, bias. We machine learning a large dataset time series ( N =...