A5067109195- Marine animal studies overview
- Radio Frequency Integrated Circuit Design
- Microwave Engineering and Waveguides
- Marine and fisheries research
- Amphibian and Reptile Biology
- Cephalopods and Marine Biology
- Avian ecology and behavior
- Nuclear Physics and Applications
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- Advanced Power Amplifier Design
- Nuclear reactor physics and engineering
- Ichthyology and Marine Biology
- Radioactive element chemistry and processing
- Marine and coastal plant biology
- Photonic and Optical Devices
- Radiation Therapy and Dosimetry
- Turtle Biology and Conservation
- Radiopharmaceutical Chemistry and Applications
- Animal Vocal Communication and Behavior
- Nuclear Materials and Properties
- GaN-based semiconductor devices and materials
- Isotope Analysis in Ecology
- Toxic Organic Pollutants Impact
- Chemical Synthesis and Characterization
Moss Landing Marine Laboratories
2014-2024
The University of Adelaide
2024
San Jose State University
2015-2022
Bellingham Technical College
2021
National Oceanic and Atmospheric Administration
1994-2019
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2019
NOAA National Marine Fisheries Service
1989-2019
Medical Technologies (Czechia)
2017-2019
Rose–Hulman Institute of Technology
2018
Jet Propulsion Laboratory
2018
Abstract Climate change has exacerbated the occurrence of large‐scale sea surface temperature anomalies, or marine heatwaves (MHWs)—extreme phenomena often associated with mass mortality events organisms. Using a combination citizen science and federal data sets, we investigated causal mechanisms 2014/2015 die‐off Cassin's Auklets ( Ptychoramphus aleuticus ), small zooplanktivorous seabird, during NE Pacific MHW 2013–2015. Carcass deposition followed an effective reduction in energy content...
SUMMARY Lunge feeding in rorqual whales is a drag-based mechanism that thought to entail high energetic cost and consequently limit the maximum dive time of these extraordinarily large predators. Although kinematics lunge fin supports this hypothesis, it unclear whether respiratory compensation occurs as consequence lunge-feeding activity. We used high-resolution digital tags on foraging humpback (Megaptera novaengliae) determine number lunges executed per well frequency between dives. Data...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 482:265-277 (2013) - DOI: https://doi.org/10.3354/meps10257 Nitrogen isotope fractionation in amino acids from harbor seals: implications for compound-specific trophic position calculations Leslie R. Germain1,*, Paul L. Koch2, James Harvey3, Matthew D. McCarthy1 1Department of Ocean Sciences, University...
Dowel Bar Retrofit (DBR) offers a great deal of promise as rehabilitation strategy for undoweled pavements with poor ride quality due to faulting. This paper presents summary several investigations intended provide recommendations best practice dowel bar retrofit. The results have some relevance new dowels in well. include two sets accelerated pavement tests on doweled pavements, one an old that looked at DBR versus performance, and the other 3 4 per wheelpath, type (epoxy coated steel,...
Six harbour seals, ages 4–8 years, were held as pairs in a 10 times 20 2 m tank filled with sea water, and on 60 occasions fed meal of specific species fish or cephalopod known size. The was drained periodically, seal faeces collected 0.5 mm sieve. Number size otoliths beaks found determined. Fifty‐eight percent 670 37% 36 cephalopods to seals represented by their faeces. Estimated number prey consumed determined from the greatest left right upper lower length ofprey measurements recovered...
Body size is an important determinant of the diving and foraging ability in air‐breathing marine vertebrate predators. Satellite‐linked dive recorders were used during 2003–2004 to investigate behavior 22 male California sea lions ( Zalophus californianus , a large, sexually dimorphic otariid) evaluate extent which body explained variation among individuals strategies. Multivariate analyses reduce number behavioral variables characterize strategies (principal component analysis, PCA),...
Understanding reproductive rates of wild animal populations is crucially important for management and conservation. Assessing pregnancy status free-ranging cetaceans has historically been difficult; however, recent advances in analytical techniques have allowed the diagnosis from small samples blubber tissue. The primary objectives this study were as follows: (i) to test efficacy progesterone assays a tool diagnosing humpback whales (Megaptera novaeangliae); (ii) estimate rate Monterey Bay,...
Abstract Sub-Saharan Africa is under-represented in global biodiversity datasets, particularly regarding the impact of land use on species’ population abundances. Drawing recent advances expert elicitation to ensure data consistency, 200 experts were convened using a modified-Delphi process estimate ‘intactness scores’: remaining proportion an ‘intact’ reference species group particular use, scale from 0 (no individuals) 1 (same abundance as reference) and, rare cases, 2 (populations that...
Abstract Theory predicts that sexually dimorphic traits under strong sexual selection, particularly those involved with intersexual signaling, can accelerate speciation and produce bursts of diversification. Sexual dichromatism (sexual dimorphism in color) is widely used as a proxy for selection associated rapid diversification several animal groups, yet studies using phylogenetic comparative methods to explicitly test an association between have produced conflicting results. rare frogs, but...
The Mascarene ridged frog, Ptychadena mascareniensis, is a species complex that includes numerous lineages occurring mostly in humid savannas and open forests of mainland Africa, Madagascar, the Seychelles, Islands. Sampling across this broad distribution presents an opportunity to examine genetic differentiation within investigate how evolution bioclimatic niches may have shaped current biogeographic patterns. Using model-based phylogenetic methods molecular-clock dating, we constructed...
Harbor seal pups are highly precocial and can swim dive at birth. Such behavioral maturity suggests that they may be born with mature body oxygen stores or develop quickly during the nursing period. To test this hypothesis, we compared blood muscle of harbor pups, yearlings, adults. We found had smaller than adults (neonates 57%, weaned 75%, yearlings 90% those adults), largely because neonatal myoglobin concentrations were low (1.6 ± 0.2 g% vs. 3.8 0.3 for adults) changed little In...
Abstract Resource partitioning is an important process driving habitat use and foraging strategies in sympatric species that potentially compete. Differences behavior are hypothesized to contribute coexistence by facilitating resource partitioning, but little known on the multiple mechanisms for may occur simultaneously. Studies further limited marine environment, where spatial temporal distribution of resources highly dynamic subsequently difficult quantify. We investigated potential...
A bstract Genetic substructure among groups of Pacific harbor seals, Phoca vitulina richardsi , along the western coast United States was investigated using mitochondrial DNA sequences. Blood and tissue samples were removed from 86 seals inhabiting Puget Sound coasts Washington, Oregon, California. 320 base‐pair segment control region amplified polymerase chain reaction directly sequenced. These data indicated a high level diversity. Thirty variable sites found that define 47 haplotypes....
The purpose of this study was to quantify the errors associated with using fecal samples determine diet California sea lion (Zalophus californianus). Fishes and squids known size number were fed five lions held in enclosures seawater-filled pools. Enclosures washed pools drained periodically so that feces could be collected a 0.5 mm mesh bag. Fish otoliths squid beaks from used estimate prey eaten. An average 50.7% (SE = 6.4%) 430 fishes 73.5% 12.0%) 49 cephalopods represented by feces,...