A5016953302- Marine and fisheries research
- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Fish Ecology and Management Studies
- Food Industry and Aquatic Biology
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Avian ecology and behavior
- Indigenous Studies and Ecology
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- Marine Biology and Ecology Research
- Cephalopods and Marine Biology
- Arctic and Russian Policy Studies
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Ichthyology and Marine Biology
- Underwater Acoustics Research
- Maritime and Coastal Archaeology
- Physiological and biochemical adaptations
- Marine and coastal plant biology
- Maritime Navigation and Safety
- Ecology and biodiversity studies
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2013-2022
National Oceanic and Atmospheric Administration
2011-2022
NOAA National Marine Fisheries Service
2010-2022
University of Washington
2001-2003
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2001
Scripps Institution of Oceanography
1999
University of California, Irvine
1996-1998
Abstract To better understand and predict Oregon coho ( Oncorhynchus kisutch ) marine survival, we developed a conceptual model of processes occurring during four sequential periods: (1) winter climate prior to smolt migration from freshwater ocean, (2) spring transition downwelling spring/summer upwelling, (3) the upwelling season (4) ocean conditions near end maturing coho's first year at sea. We then parameterized General Additive Model (GAM) with Production Index (OPI) smolt‐to‐adult...
We examined the distribution of sardine larvae relative to environmental conditions with purpose identifying and characterizing habitat that encourages high larval growth survival, based on 1983–1998 surveys California Cooperative Oceanic Fisheries Investigations (CalCOFI). Long‐term averages show ‘survivors’ (spatially aggregated ≥ 18 days old) were most abundant offshore, whereas egg density, chlorophyll biomass zooplankton volume greatest inshore. In contrast, mesoscale eddies, observed...
a l p O r Y e ( 2 0 7 -2 9) relationships among the Bering, Chukchi, and Beaufort Seas in Time of Climate Change Black-legged Kittiwakes flying over sea ice arctic region Spitsbergen/Svalbard.
Climate variability is well known to affect the marine survival of coho salmon (Oncorhynchus kisutch) in Oregon and Washington. Marine factors have been used explain up 83% coastal natural recruitment, yet about half recruitment comes from freshwater life phase cycle. This seeming paradox could be resolved if were linked climate influencing correlated with those affecting survival. Effects on broad-scale fluctuations or production are not known. We examined influence seasonal stream flows...
Abstract The goals of this research were to investigate geographic patterns in the Aleutian Island region's demersal ichthyofauna and determine whether they reflected physical biological oceanographic documented by other authors volume. analyses structured according level organization: at community level, species occurrence structure investigated; population distribution abundance examined; individual food habits growth studied. There step‐changes occurrence, diversity, Samalga Pass sites...
Pacific cod (Gadus macrocephalus) is an economically and ecologically important species in the southeastern Bering Sea Aleutian Islands, yet little known about spawning dynamics of these regions. To address this knowledge gap, we applied a gross anatomical maturity key for to describe temporal spatial patterns reproductive status over three winter seasons: 2005, 2006, 2007. Maturity female was assessed by fishery observers during sampling commercial catches used construct maps showing...
ABSTRACT We investigated the distribution of common murres, Uria aalge , and shearwaters, Puffinus griseus P. tenuirostris relative to their fish prey at two spatial scales, one hundreds kilometres other kilometres. Data on oceanographic conditions, sea birds in upper water column were collected during three research surveys off Vancouver Island (British Columbia, Canada). At large scale, we found that both murres shearwaters more abundant inshore than offshore shelf break likewise habitat....
Uni‐ and bivariate spectral analyses of the spatial distribution thick‐billed murres Uria lomvia acoustic estimates prey biomass in southeastern Bering Sea were used to examine variance patterns a predator its at multiple scales. Power, phase coherency spectra from individual transects, as well those averaged over all examined. The average spectra, representing temporal scale months, showed that had similar positively correlated range scales studied. hours, several not evident spectra. In...
Energy density data of prey items are necessary to estimate food requirements predators. The goal this study was provide proximate composition and energy information for Steller sea lion (Eumetopias jubatus) species where there seasonal and/or geographic gaps in the existing data. Opportunistic collections were made on board National Oceanic Atmospheric Administration fisheries research surveys Aleutian Islands region, eastern Bering Sea, Gulf Alaska, targeting particular interest. Proximate...