A5059880543- Marine animal studies overview
- Marine and fisheries research
- Mercury impact and mitigation studies
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Turtle Biology and Conservation
- Cephalopods and Marine Biology
- Marine Bivalve and Aquaculture Studies
- Fish Ecology and Management Studies
- Toxic Organic Pollutants Impact
- Avian ecology and behavior
- Underwater Vehicles and Communication Systems
- Animal Behavior and Reproduction
- Cryospheric studies and observations
- Aerospace Engineering and Energy Systems
- Biodiesel Production and Applications
- Parasite Biology and Host Interactions
- Wildlife Ecology and Conservation
- Parasitic infections in humans and animals
- Nicotinic Acetylcholine Receptors Study
- Climate change impacts on agriculture
- Environmental DNA in Biodiversity Studies
- Physiological and biochemical adaptations
- Heavy Metal Exposure and Toxicity
University of Washington
2019-2025
Cooperative Institute for Research in Environmental Sciences
2020-2025
University of California, Santa Cruz
2013-2024
National Oceanic and Atmospheric Administration
2024
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2024
NOAA National Marine Fisheries Service
2024
Seattle University
2022
Moss Landing Marine Laboratories
2012-2014
California Department of Fish and Wildlife
2013
San Jose State University
2012
Significance Understanding the key drivers of animal movement is crucial to assist in mitigating adverse impacts anthropogenic activities on marine megafauna. We found that patterns megafauna are mostly independent their evolutionary histories, differing significantly from for terrestrial animals. detected a remarkable convergence distribution speed and turning angles across organisms ranging whales turtles (epitome slowest animals land but not at sea). Marine show prevalence dominated by...
Abstract As climate stressors are impacting marine ecosystems and fisheries across the world, ecosystem models that incorporate environmental variables increasingly used to inform ecosystem-based management. The assumptions around mechanistic links between biological processes in these important, but implications for model outcomes of which captured how they affect modeled seldom explored. Using a whole-ecosystem (Atlantis) Gulf Alaska, we explore effects capturing physical (increased...
Integrating behavior and physiology is critical to formulating new hypotheses on the evolution of animal life-history strategies. Migratory capital breeders acquire most energy they need sustain migration, gestation, lactation before parturition. Therefore, when predicting impact environmental variation such species, a mechanistic understanding their migratory required. Using baleen whales as model system, we developed dynamic state variable that captures interplay among behavioral...
Animals make behavioural and reproductive decisions that maximise their lifetime success, thus fitness, in light of periodic stochastic variability the environment. Modelling variation an individual's energy levels formalises this tradeoff helps to quantify population‐level consequences stressors (e.g. disturbance from human activities environmental change) can affect behaviour or physiology. In study, we develop a dynamic state variable model for spatially explicit behaviour, physiology...
Forage fishes are key energy conduits that transfer primary and secondary productivity to higher trophic levels. As novel environmental conditions caused by climate change alter ecosystems predator–prey dynamics, there is a critical need understand how forage fish control bottom-up forcing of food web dynamics. In the northeast Pacific, northern anchovy ( Engraulis mordax ) an important species with high interannual variability in population size subsequently impacts foraging reproductive...
Abstract Deep ocean foraging northern elephant seals ( Mirounga angustirostris ) consume fish and squid in remote depths of the North Pacific Ocean. Contaminants bioaccumulated from prey are subsequently transferred by adult females to pups during gestation lactation, linking mercury contamination mesopelagic food webs (200–1000 m depths). Maternal transfer developing seal was related maternal strongly correlated with behavior (biotelemetry isotopes). Mercury concentrations lanugo (hair...
Summary Anthropogenic disturbance is of increasing concern for wildlife populations, necessitating the development models that link behavioural changes at individual level with biologically meaningful population level. We developed a general framework estimating fitness consequences affects foraging behaviour using state‐dependent theory implemented by Stochastic Dynamic Programming (SDP). illustrate this generalized examples pinnipeds, group marine carnivores include both capital‐ and...
Bioenergetic approaches are increasingly used to understand how marine mammal populations could be affected by a changing and disturbed aquatic environment. There remain considerable gaps in our knowledge of bioenergetics, which hinder the application bioenergetic studies inform policy decisions. We conducted priority-setting exercise identify high-priority unanswered questions with an emphasis on relevant conservation management. Electronic communication virtual workshop were solicit...
Abstract Background Understanding the abiotic and biotic drivers of species distribution is critical for climate-informed ecosystem management. We aimed to understand habitat selection northern fur seals in eastern Bering Sea, a declining population that also key predator walleye pollock, target largest U.S. commercial fishery. Methods developed models using random forest by combining satellite telemetry data from lactating female tagged at different rookery complexes on Pribilof Islands Sea...
Bioenergetics is the study of how animals achieve energetic balance. Energetic balance results from expenditure an individual and energy they extract their environment. Ingested depends on several extrinsic (e.g prey species, nutritional value composition, density availability) intrinsic factors (e.g. foraging effort, success at catching prey, digestive processes associated losses, capacity). While focus in bioenergetic modelling often costs animal incurs, robust estimation individual's...
Rationale Mixing models are a common method for quantifying the contribution of prey sources to diet an individual using stable isotope analysis; however, these rely upon known trophic discrimination factor (hereafter, TDF) that results from fractionation between and animal tissues. Quantifying TDFs in captive animals is ideal, because controlled proportional contributions isotopic values all items known. Methods To calculate Hawaiian monk seal, northern elephant bearded ringed spotted...
Abstract Characterizing habitat suitability for a marine predator requires an understanding of the environmental heterogeneity and variability over range in which population moves during particular life cycle. Female California sea lions ( Zalophus californianus ) are central‐place foragers particularly constrained while provisioning their young. During this time, selection is function prey availability proximity to rookery, has important implications reproductive success. We explore how...
Abstract Intraspecific variability in foraging behavior has been documented across a range of taxonomic groups, yet the energetic consequences this variation are not well understood for many species. Understanding effect behavioral on energy expenditure and acquisition is particularly crucial mammalian carnivores because they have high requirements that place considerable pressure prey populations. To determine influence balance, we combined simultaneous measurements at‐sea field metabolic...
Mercury (Hg) poses a health risk to wildlife populations and has been documented at relatively high concentrations in many marine mammals, including wild-caught pinnipeds along the central California, US coast. We measured total Hg ([THg]) hair blood of live-stranded harbor seals (HS; Phoca vitulina), California sea lions (CSL; Zalophus californianus), northern elephant (NES; Mirounga angustirostris) quantify species, temporal, spatial variability [THg] assess relationships between by...
Abstract Acoustic disturbance is a growing conservation concern for wildlife populations because it can elicit physiological and behavioral responses that have cascading impacts on population dynamics. State‐dependent life history models implemented via Stochastic Dynamic Programming (SDP) provide natural framework quantifying biologically meaningful changes resulting from by linking environment, physiology, metrics of fitness. We developed an SDP model using the endangered western gray...