A5008287836- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
- Aquaculture disease management and microbiota
- Isotope Analysis in Ecology
- Salmonella and Campylobacter epidemiology
- Vibrio bacteria research studies
- Wildlife Ecology and Conservation
- Aquaculture Nutrition and Growth
- Hydrology and Drought Analysis
- Fish Biology and Ecology Studies
- Genetic and phenotypic traits in livestock
- Ocean Acidification Effects and Responses
- Water resources management and optimization
- Marine animal studies overview
- Cephalopods and Marine Biology
- Coral and Marine Ecosystems Studies
- Myxozoan Parasites in Aquatic Species
- Law, Economics, and Judicial Systems
- Ecosystem dynamics and resilience
- Evolution and Genetic Dynamics
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2012-2023
NOAA National Marine Fisheries Service
2011-2023
National Oceanic and Atmospheric Administration
2008-2023
University of Washington
2002
ABSTRACT Since 1997, cases of Vibrio parahaemolyticus -related gastroenteritis from the consumption raw oysters harvested in Washington State have been higher than historical levels. These shown little or no correlation with concentrations potentially pathogenic V. (positive for thermostable direct hemolysin gene, tdh ) oysters, although significant + strains were isolated shellfish-growing areas Pacific Northwest (PNW). We compared clinical and environmental PNW to those other geographic...
Introduction Understanding how abundance, productivity and distribution of individual species may respond to climate change is a critical first step towards anticipating alterations in marine ecosystem structure function, as well developing strategies adapt the full range potential changes. Methods This study applies NOAA (National Oceanic Atmospheric Administration) Fisheries Climate Vulnerability Assessment method 64 federally-managed California Current Large Marine Ecosystem assess their...
Abstract The natural mortality rate M is an important parameter for understanding population dynamics, and extraordinarily difficult to estimate many fish species. uncertainty associated with translates into increased in fishery stock assessments. Estimation of within a assessment model complicated by its confounding other life history parameters which are also uncertain, some typically estimated the model. Ageing error variation growth, may not be fully modelled, can affect estimation M, as...
Integrated stock assessment models derive estimates of management quantities by fitting to indices abundance and length age compositions. For composition data, where a multinomial likelihood is often applied, weights are determined input sample sizes, which can be an important contributor model results. We used generic bootstrap method, verified through simulation, calculate year-specific maximum realized sizes from the observation error inherent in fishery biological data. Applying this...
The Gram-negative bacterium Vibrio parahaemolyticus (Vp) is a major cause of illness associated with the consumption raw or undercooked seafood, primarily oysters. This species natural member bacterial community in brackish waters and bioaccumulated by oysters through filter feeding. Only subset strains thought to be pathogenic. Currently known virulence markers include gene for thermostable direct hemolysin (tdh). In this work we analyzed water total Vp encoding tdh from 26 oyster-growing...
The alternating translucent and opaque banding pattern in canary rockfish (Sebastes pinniger) otoliths, aged using a break-and-burn methodology, are annual markings. To validate age assignment, we compared measured radiocarbon levels otolith cores with reference chronology developed from known Pacific halibut (Hippoglossus stenolepis). An average 2- to 3-year phase shift was detected between the that likely result of differences regional oceanography or underageing bias. assumption ageing...
One of the argued research-related benefits marine protected areas (MPAs) to fisheries management is that because there no fishing inside an MPA, it may be possible precisely estimate rate natural mortality and better determine growth maturity rates, parameters are often prespecified in stock assessments. This study assesses degree which having MPA increases ability these a integrated assessment model, Stock Synthesis; how long would take for reflected improved estimates quantities; extent...
Hook-and-line surveys can be used to estimate population trends in fish species where conventional methods such as trawl, acoustic, visual, or pot cannot applied. allow for the collection of biological information, but resultant indices abundance may biased. We designed simulations address concerns around survey design, hook saturation, and competition among found that catch per unit effort (CPUE) declined more slowly than size across all scenarios. This hyperstability was most prominent...
As petrale sole (Eopsetta jordani) is a valuable groundfish harvested in the California Current, proper ageing important for its assessment and management. This study presents first bomb radiocarbon reference chronology Current age validation. Break-and-burn surface ages are negatively biased by approximately 1 year 2–3 years, respectively. The validation curves more variable show lag rate of increase comparison to most other time series marine systems. Upwelling produces lagged levels owing...
Abstract The bomb radiocarbon chronometer has become a standard tool for assessing the accuracy of otolith‐based fish age estimates. Use depends upon increase in 14 C that occurred due to atmospheric testing nuclear weapons middle 20th century. In previous analyses, variety ad hoc methods have been used compare test chronologies with reference chronologies. This paper proposes deterministic coupled‐functions model describes and standardizes facilitates comparisons within across species. this...
Abstract The limited‐entry bottom trawl fishery for groundfish along the U.S. West Coast operates under a catch share program, which is implemented with intention of improving economic efficiency fishery, maximizing fishing opportunities, and minimizing bycatch. However, stocks low harvest guidelines have limited ability fishermen to maximize their more abundant stocks. Size‐selection characteristics 114‐mm 140‐mm T90‐mesh cod ends traditional diamond‐mesh end were examined by using covered...
DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 65:29-41 (2005) - doi:10.3354/dao065029 Immunosuppression in progeny chinook salmon infected with Renibacterium salmoninarum: re-analysis a brood stock segregation experiment Owen S. Hamel* Northwest Fisheries Science Center, National Marine Service, 2725 Montlake Boulevard East, Seattle, Washington 98112, USA...