A5022163053- Marine and fisheries research
- Fish Ecology and Management Studies
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Crustacean biology and ecology
- Marine animal studies overview
- Oceanographic and Atmospheric Processes
- Fish Biology and Ecology Studies
- Arctic and Antarctic ice dynamics
- Marine and coastal plant biology
- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
- Marine and coastal ecosystems
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Genetic diversity and population structure
- Marine Invertebrate Physiology and Ecology
- Marine Ecology and Invasive Species
- Ocean Acidification Effects and Responses
- Climate change impacts on agriculture
- Ichthyology and Marine Biology
Oregon Department of Fish and Wildlife
2018-2024
Oregon State University
2023-2024
NOAA National Marine Fisheries Service Southeast Fisheries Science Center
2018-2021
NOAA National Marine Fisheries Service
2018-2021
University of Miami
2018-2021
University of Oregon
2013-2020
National Oceanic and Atmospheric Administration
2018
The 2021 summer upwelling season off the United States Pacific Northwest coast was unusually strong leading to widespread near-bottom, low-oxygen waters. During 2021, an unprecedented number of ship- and underwater glider-based measurements dissolved oxygen were made in this region. Near-bottom hypoxia, that is less than 61 µmol kg
Life-history traits such as spawning migrations and timing of reproduction are adaptations to specific environmental constraints seasonal cycles in many organisms' annual routines. In this study we analyse how offspring fitness constrains phenology a large migratory apex predator, the Atlantic bluefin tuna. The reproductive schedule tuna varies between sites, suggesting plasticity local conditions. Generally, temperature is considered be main constraint on phenology. We combine evidence from...
From fishers to farmers, people across the planet who rely directly upon natural resources for their livelihoods and well-being face extensive impacts from climate change. However, local- regional-scale associated risks can vary geographically, implications development of adaptation pathways that will be most effective specific communities are underexplored. To improve this understanding at relevant local scales, we developed a coupled social-ecological approach assess risk posed fishing...
Abstract To investigate the timing and intensity of winter spawning by coastal invertebrates, we enumerated embryos in plankton samples collected daily time series from January to March 2014 (79 d), 2015 (73 2016 (74 d). Samples were near mouth Coos Bay estuary Oregon. We several hundred different morphologically distinct types larvae representing at least five phyla. Forty‐three embryo abundant enough (abundance > 500 over series) enable statistical analysis. Twenty these identified...
Little is known about intraspecific variation within the deacon rockfish (Sebastes diaconus), a recently described species found in northeast Pacific Ocean. We investigated population structure among fish sampled from two nearshore reefs (Siletz Reef and Seal Rock) one offshore site (Stonewall Bank) <50-km2 area off Oregon coast. Fish three sample sites exhibited small but statistically significant differences based on genetic at >15,000 neutral loci, whether analyzed independently or...
Of the seven species of Pacific rockfish declared overfished in California Current 2008, yelloweye ( Sebastes ruberrimus ) is only remaining species. Part original rebuilding plan included designation a conservation area, rocky reef closed off Central Coast Oregon that to bottom fishing. The area’s ability help rebuild population, predicated on theory demersal rockfishes are relatively sedentary. However, years since being overfished, acoustic tagging studies suggested did not remain area....
Abstract In this manuscript, we test how an understanding of geographical variation in larval fitness relation to temperature and habitat use could be a useful method improve our recruitment develop better indices annual recruitment. On the basis assumption that growth survival tuna larvae are influenced by temperature, have developed potential index for Atlantic bluefin (Thunnus thynnus) combining empirical data from egg rearing experiments with hydrodynamic models. The were designed full...
Temperature is often an important variable influencing the vertical position of fish larvae in water column. The same species may show different distributions areas with a strong near-surface seasonal thermocline compared to isothermal regions. In surface thermocline, tuna significant preference for warmer layers. Little known regarding larval distribution waters and on associated assemblages. We conducted stratified sampling using methodology fishing device (MOCNESS) two major spawning...
Abstract Stock assessors commonly use models that incorporate biological data such as fish length and age to determine the status of stocks how different management scenarios affect stock size. Ages used in assessment need be accurate precise because ageing error can many model inputs potentially result mismanagement. Despite requirement for sound data, few studies have investigated accuracy ages groundfish captured coastal nearshore waters off Oregon, USA. In this study, we validate otolith...
Abstract New survey technologies are needed to untrawlable habitats in a cost-effective and nonlethal manner with minimal impacts on habitat nontarget species. Here, we test the efficacy of integrating data from suspended underwater camera acoustic generate population estimates for nearshore Black (Sebastes melanops), Blue mystinus), Deacon Rockfish diaconus). We surveyed Seal Rock Reef near Newport, Oregon, compared our results derived mark–recapture study conducted at same reef. fish...
The invasion of the western Atlantic by Indo-Pacific lionfish ( Pterois volitans / miles ) is a serious threat to ecological stability region. early life history remains poorly understood despite important role that larval supply plays reef fish population dynamics. In this study, we characterized patterns in horizontal and vertical distributions collected Caribbean, US Gulf Mexico from 19 ichthyoplankton surveys conducted 2009–2016. Using generalized additive models (GAMs), assessed...
Abstract Swordfish Xiphias gladius (Linnaeus, 1758) are a circumglobal pelagic fish targeted by multiple lucrative fisheries. Determining the distribution of swordfish larvae is important for indicating reproductive activity and understanding early life history swordfish. We identify characterize larval distributions during peak spawning throughout Gulf Mexico western Caribbean Sea with generalized additive models ( GAM s) using catches ichthyoplankton surveys in April May 2010, 2011, 2012....
From fishers to farmers, people across the planet who rely directly upon natural resources for their livelihoods and well-being face extensive impacts from climate change. However, local- regional-scale associated risks can vary geographically, implications development of adaptation pathways that will be most effective specific communities are underexplored. To improve this understanding at relevant local scales, we developed a coupled social-ecological approach assess risk posed fishing...
Abstract We combined a high-resolution acoustic telemetry array with presence/absence receivers to conduct preliminary study of the seasonal movements, activity patterns, and habitat associations newly described Deacon Rockfish ( Sebastes diaconus ) . Eleven mature female were tagged monitored during an 11-month period, at nearshore rocky reef off Seal Rock, Oregon, USA, area recurring hypoxia (defined as dissolved oxygen concentration [DO] < 2 mg l −1 ). Two tags detected leaving by day...
Abstract Understanding the basic biology of exploited fish populations, and how it changes across waterscape, is essential to sustainable management. Biological features (age, growth, reproductive investment, condition) for newly described Deacon Rockfish Sebastes diaconus were evaluated between two different population segments, an nearshore unexploited offshore population, used parameterize dynamics models evaluate area‐specific biological influence measures stock status. Monthly...
Abstract Combining hydroacoustics and underwater video is an effective tool for generating fish population estimates. However, cannot be used to differentiate from the seafloor within area known as acoustic dead zone. A common way address this exclude data near bottom. The effect of exclusion zone on estimates nearshore semi-pelagic rockfish unknown. This study explores a bottom (0–1 m) by comparing ROV combined hydroacoustic method. Higher densities species (Black Blue/Deacon Rockfish) were...