A5013674756- Marine and fisheries research
- Fish Ecology and Management Studies
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Marine Invertebrate Physiology and Ecology
- Marine and environmental studies
- Oceanographic and Atmospheric Processes
- Marine animal studies overview
- Marine and coastal ecosystems
- Coral and Marine Ecosystems Studies
- Marine Biology and Ecology Research
- Evolutionary Game Theory and Cooperation
- Aquaculture Nutrition and Growth
- Cephalopods and Marine Biology
- Food Industry and Aquatic Biology
- Identification and Quantification in Food
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Marine Ecology and Invasive Species
- Water Quality and Resources Studies
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Marine and coastal plant biology
- Parasite Biology and Host Interactions
- Ocean Acidification Effects and Responses
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2016-2025
National Oceanic and Atmospheric Administration
2016-2025
NOAA National Marine Fisheries Service
2015-2024
Oregon State University
1986-2024
Oregon Department of Fish and Wildlife
2012-2024
Newport Hospital
2023
American Fisheries Society
2020
Portland State University
2006
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
1991-2002
North Pacific Marine Science Organization
2001
A perceived recent increase in global jellyfish abundance has been portrayed as a symptom of degraded oceans. This perception is based primarily on few case studies and anecdotal evidence, but formal analysis temporal trends populations missing. Here, we analyze all available long-term datasets changes across multiple coastal stations, using linear logistic mixed models effect-size to show that there no robust evidence for jellyfish. Although small since the 1970s, this trend was...
The prevalence and intensity of marine heatwaves is increasing globally, disrupting local environmental conditions. individual population-level impacts prolonged on species have recently been demonstrated, yet whole-ecosystem consequences remain unexplored. We leveraged time series abundance data 361 taxa, grouped into 86 functional groups, from six long-term surveys, diet information a new database, previous modeling efforts, to build two food web networks using an extension the popular...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 233:89-103 (2002) - doi:10.3354/meps233089 Increases in jellyfish biomass Bering Sea: implications for ecosystem Richard D. Brodeur1,*, Hiroya Sugisaki2, George L. Hunt Jr3 1Northwest Fisheries Science Center, National Service, Newport, Oregon 97365, USA 2Tohoku Research Institute, 27-5 Shinhama-cho 3 chome,...
Contrast degradation theory predicts that increased turbidity decreases the visibility of objects are visible at longer distances more than short distances. Consequently, should disproportionately decrease feeding rates by piscivorous fish, which feed on larger and prey particle-feeding planktivorous fish. We tested this prediction in a series laboratory experiments, results indicated consumption two species fish (juvenile chum salmon (Oncorhynchus keta) walleye pollock (Theragra...
ABSTRACT Zooplankton collections from the subarctic Pacific were analyzed two periods (1956–1962 and 1980–1989). In this report, we document: 1) a positive correlation between intensity of winter winds subsequent summer zooplankton biomass in gyre within these periods; 2) doubling similar increase pelagic fish squid abundance time. Some possible explanations for changes are considered.
We examined quantitative catches of large medusae from summer bottom trawl surveys that sampled virtually the same grid station on eastern Bering Sea shelf using methodology every year 1979 to 1997. This series shows a gradual increase in biomass 1989, followed by dramatic 1990s. The median increased tenfold between 1982–1989 and 1990–1997 periods. Most this was found within Middle Shelf Domain (50 < z 100 m). greatest rate occurred north‐west portion domain. Whether gelatinous...
Abstract Understanding changes in the migratory and reproductive phenology of fish stocks relation to climate change is critical for accurate ecosystem‐based fisheries management. Relocation timing reproduction can have dramatic effects upon success populations throughout food web. During anomalously warm conditions (1–4°C above normal) northeast Pacific Ocean during 2015–2016, we documented shifts spawning location several pelagic based on larval samples. Total concentrations northern...
The community structure of pelagic zooplankton and micronekton may be a sensitive indicator changes in environmental conditions within the California Current ecosystem. Substantial oceanographic 2015 2016 due to anomalously warm ocean associated with 'warm blob' major El Niño perturbation resulted onshore northward advection warmer more stratified surface waters resulting reduced upwelling. Data from fine-mesh trawl surveys conducted off Oregon Washington during early summer 2011 2013-2016...
Spatial distributions of marine fauna are determined by complex interactions between environmental conditions and animal behaviors. As climate change leads to warmer, more acidic, less oxygenated oceans, species shifting away from their historical distribution ranges, these trends expected continue into the future. Correlative Species Distribution Models (SDMs) can be used project future habitat extent for species, with many different statistical methods available. However, it is vital...
Abstract Early life survival is critical to successful replenishment of fish populations, and hypotheses developed under the Growth‐Survival Paradigm (GSP) have guided investigations controlling processes. The GSP postulates that recruitment depends on growth mortality rates during early stages, as well their duration, after which declines substantially. predicts a shift in frequency distribution histories with age towards faster relative initial population because slow‐growing individuals...
The dietary compositions of 18 species pelagic nekton were examined from purse seine collections made during 4 (1981 to 1984) oceanographically contrasting summers in the coastal upwelling zone off Oregon and Washington, USA.Euphausiids, hyperiid amphipods, decapod larvae.pteropods, larval juvenile fishes dominant prey categories consumed all years by this assemblage nekton, although their relative proportions varied among years.Considerable differences observed food habits, diet overlap,...
Although the California Current has undergone substantial environmental shifts in past few decades, summer of 2005 exhibited highly anomalous conditions relative to all previous recorded summers terms late initiation upwelling and resulting elevated surface temperatures depressed productivity through July. The response pelagic nekton these was widespread included onshore poleward displacement taxa new geographic areas, population changes within normal range, reduced early life stages based...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 389:271-294 (2009) - DOI: https://doi.org/10.3354/meps08153 Association of predators and prey at frontal features in California Current: competition, facilitation, co-occurrence David G. Ainley1,*, Katie D. Dugger2, R. Glenn Ford3, Stephen Pierce4, Douglas C. Reese2, Richard Brodeur5, Cynthia T. Tynan6, John...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 420:15-26 (2010) - DOI: https://doi.org/10.3354/meps08876 Prey dominance shapes trophic structure of northern California Current pelagic food web: evidence from stable isotopes and diet analysis Todd W. Miller1,*, Richard D. Brodeur2, Greg Rau3, Koji Omori1 1Center for Environmental Studies (CMES), Ehime...
A majority of the world's largest net-based fisheries target planktivorous forage fish that serve as a critical trophic link between plankton and upper-level consumers such large predatory fishes, seabirds, marine mammals.Because production drives also jellyfish production, these taxa often overlap in space, time, diet coastal ecosystems.This likely leads to competitive interactions, are effective predators early life stages zooplankton.The interplay groups is made more complex by harvest...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 617-618:149-163 (2019) - DOI: https://doi.org/10.3354/meps12497 Effects of warming ocean conditions on feeding ecology small pelagic fishes in a coastal upwelling ecosystem: shift gelatinous food sources Richard D. Brodeur1,*, Mary E. Hunsicker1, Ashley Hann2, Todd W. Miller3 1NOAA, Northwest Fisheries...