A5000192960- Parasite Biology and Host Interactions
- Coral and Marine Ecosystems Studies
- Marine and fisheries research
- Marine animal studies overview
- Helminth infection and control
- Radiation Effects and Dosimetry
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Marine and coastal plant biology
- Primate Behavior and Ecology
- Superconducting Materials and Applications
- Environmental DNA in Biodiversity Studies
- Evolution and Genetic Dynamics
- Zoonotic diseases and public health
- Radiation Shielding Materials Analysis
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Avian ecology and behavior
- Advanced Radiotherapy Techniques
- Nematode management and characterization studies
- Multisensory perception and integration
- Environmental Policies and Emissions
- Pacific and Southeast Asian Studies
- Animal Vocal Communication and Behavior
- Paleopathology and ancient diseases
University of California, Santa Barbara
2016-2023
Stanford University
2014-2022
Pacific University
2016-2022
National Institute of Ionizing Radiation Metrology
1996-2016
National Agency for New Technologies, Energy and Sustainable Economic Development
1995-2016
Thomas Jefferson National Accelerator Facility
2002-2004
Despite the ubiquity and ecological importance of parasites, relatively few studies have assessed their response to anthropogenic environmental change. Heuristic models predicted both increases decreases in parasite abundance human disturbance, with empirical support for both. However, most focus on one or a selected species. Here, we assess parasites seven species coral reef fishes collected from three fished unfished islands Line Islands archipelago central equatorial Pacific. Because...
Group living is a common strategy used by fishes to improve their fitness. While sociality associated with many benefits in natural environments, including predator avoidance, this behaviour may be maladaptive the Anthropocene. Humans have become dominant marine systems, modern fishing gear developed specifically target groups of schooling species. Therefore, ironically, behavioural strategies which evolved avoid non-human predators now actually make certain fish more vulnerable predation...
Abstract Human impacts on ecosystems can decouple the fundamental ecological relationships that create patterns of diversity in free‐living species. Despite abundance, ubiquity, and importance parasites, it is unknown whether same decoupling effects occur for parasitic We investigated influence fishing relationship between host parasite parasites coral reef fishes three fished unfished islands central equatorial Pacific. Fishing was associated with a shallowing positive...
Variation in behavior within marine and terrestrial species can influence the functioning of ecosystems they inhabit. However, contribution social to ecosystem function remains underexplored. Many coral reef fish provide potentially insightful models for exploring how shapes ecological because exhibit radical intraspecific variation sociality a shared habitat. Here, we an empirical exploration on shoaling surgeonfish (
Abstract Although the economic value of wildlife historically has been attributed to its consumptive use, global growth ecotourism expanded valuation include non‐consumptive uses. In California, critically endangered giant sea bass ( Stereolepis gigas ) is paradoxically both a flagship species in recreational dive industry and regularly sold California's commercial fisheries when incidentally caught. The differences S. these two key stakeholders – fishers scuba divers were explored. average...
Abstract Although parasites are ubiquitous in marine ecosystems, predicting the abundance of present within ecosystems has proven challenging due to unknown effects multiple interacting environmental gradients and stressors. Furthermore, often considered as a uniform group despite their significant diversity. We aim determine potential importance predictors parasite coral reef including area, island human population density, chlorophyll‐ , host diversity, cover, isolation. Using model...
Human-induced environmental change has affected ecosystems on a global scale, altering the ecology and evolutionary trajectories of various species. Fishing marine predators, any cascading effects ecosystems, is critical concern. Predators are thought to be an important reason for why fish shoal; thus, reducing predator populations could alter shoaling behavior prey fish, impact aspects their or life-histories. Here, we explore differences in coral reef fishes at 2 islands whose face...
The primary standard of absorbed dose to water established at ENEA for the Co-60 gamma-ray quality is based on a graphite calorimeter and an ionometric transfer system. This was recently improved after more accurate assessment some perturbation effects in modification phantom shape size. conversion procedure requires two corresponding depths, one water, where radiation energy spectra must be same. points were determined by Monte Carlo simulation scaled phantoms. A thorough study gap effect...
Abstract Our study highlights the effect of macroalgae Asparagopsis taxiformis on feeding behaviour tropical surgeonfish Acanthurus triostegus . The presence A. chemical cues reduced feeding, suggesting that this algae could affect not only survival fish in post‐larval stage, but also alter grazing pressure coral reefs.
Dosimetry in radiotherapy with ionization chambers calibrated 60Co gamma beams terms of absorbed dose to water, DW, can be performed if a factor conventionally denoted as kQ is known. The depends on the beam quality and chamber characteristics. Calculated values factors for many types have been recently published. In this work experimental determination various was 6 MV 15 photon 14 MeV electron beam. were determined by procedure based relative measurements ferrous sulphate solution...
Despite the established importance of rodents as reservoirs vector-borne zoonoses in East Africa, there is relatively limited information regarding infestation parameters and host associations ectoparasites that vector many such pathogens among small mammals this region. Between 2009 2013, were live-trapped semiarid savanna Kenya. A subset these individual hosts, including 20 distinct taxa, was examined for ectoparasites, which identified to species. Species fleas, ticks, mites, sucking lice...
Abstract Mobile animals that traverse ecosystem boundaries can fundamentally reshape environments by providing critical nutrient and energy inputs to the ecosystems they inhabit. In particular, aggregations of seabirds often transform coastal island through large amounts nutrient‐rich guano deposition. Anthropogenically driven losses these subsidies occur changes in abundance mobile species, including seabirds, have been shown drive whole‐scale state change on islands. However, even though...
A successful GeV scale energy recovery demonstration with high ratio of accelerated-to-recovered energies (50:1) was recently carried out on the CEBAF recirculating linear accelerator. Future (multi-GeV), current (hundreds milli-Amperes) beams would require gigaWatt-class RF systems in conventional linacs - a prohibitively expensive proposition. However, invoking alleviates extreme power demands; required becomes nearly independent beam current, which improves linac efficiency and increases...
Palmyra Atoll, USA, in the Central Pacific, has remained mostly uninhabited since construction and abandonment of a U.S. naval base during World War II. However, effects Navy modifications have persisted, affecting physical conditions benthic habitat quality Palmyra's lagoon sand flats. Sand flats provide important nonbreeding for Bristle-thighed Curlews (Numenius tahitiensis), migratory shorebird listed as "vulnerable" by International Union Conservation Nature Natural Resources. We used...
The Jefferson Laboratory's CEBAF Energy Upgrade to 12 GeV will be accomplished by employing new cryomodules with an increase in effective length of 40 percent while maintaining the same nominal cryomodule slot within linac. This is being achieved changing from eight five-cell cavity structure seven-cell and removing all bellows between cavities along beamline. approach has presented significant challenges respect design as it pertains cooldown, support, alignment tuning criteria. solutions...