A5074798926- Fish Ecology and Management Studies
- Marine and fisheries research
- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Genetic diversity and population structure
- Environmental DNA in Biodiversity Studies
- Aquatic Invertebrate Ecology and Behavior
- Marine Bivalve and Aquaculture Studies
- Zebrafish Biomedical Research Applications
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Ocean Acidification Effects and Responses
- Wildlife Ecology and Conservation
- Water resources management and optimization
- Identification and Quantification in Food
- Fish Biology and Ecology Studies
- Marine Biology and Ecology Research
- Marine animal studies overview
- Physiological and biochemical adaptations
- Water Quality and Resources Studies
- Fish biology, ecology, and behavior
- Water Quality and Pollution Assessment
- Ichthyology and Marine Biology
National Oceanic and Atmospheric Administration
2010-2024
NOAA Pacific Marine Environmental Laboratory
2019-2024
NOAA National Marine Fisheries Service
2005-2023
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2010-2023
Cornell University
1995-2006
Construction of four dams on the lower Snake River (in northwestern United States) between 1961 and 1975 altered salmon spawning habitat, elevated smolt adult migration mortality, contributed to severe declines populations. By applying a matrix model long-term population data, we found that (i) dam passage improvements have dramatically mitigated direct mortality associated with dams; (ii) even if main stem survival were 100%, spring/summer chinook (Oncorhynchus tshawytscha) would probably...
Abstract Interpopulation variation in dynamics can buffer species against environmental change. We compared population synchrony a group of threatened Chinook salmon the highly impacted Snake River basin (Oregon, Washington, Idaho) to that sockeye stock complex less impact Bristol Bay (Alaska). Over last 40 years, >90% populations became more synchronized with one another. However, over period, from Alaska did not exhibit systemic changes synchrony. Coincident increasing synchrony, there...
Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need account for geographical patterns traits sensitive change, as well threats species-level diversity. As part of an effort provide such information, we conducted a vulnerability assessment that included all anadromous Pacific salmon and steelhead (Oncorhynchus spp.) population units listed under the U.S. Endangered Species Act. Using expert-based scoring system,...
In the United States, implementation of strong legislative mandates and investments in scientific programmes have supported sustainable fisheries management for seafood production, marine ecosystems, maritime communities economies. Changing climate ocean conditions present new growing challenges that affect ability to manage fisheries. To better prepare respond these challenges, U.S. National Marine Fisheries Service has called increasing delivery, use environmental information fulfil its...
Twelve salmonid evolutionarily significant units (ESUs) throughout the Columbia River Basin are currently listed as threatened or endangered under Endangered Species Act; these ESUs affected differentially by a variety of human activities. We present standardized quantitative status and risk assessment for 152 stocks in 24 nonlisted stocks. Using data from 1980–2000, which represents time stable conditions hydropower system period ocean generally regarded poor salmonids, we estimated two...
The diet and habitat of eight danionin species ( Danio Devario ) from 18 sites in India Thailand are reported. At every site, characteristics, including pH, light penetration, water temperature, current speed, stream dimensions, canopy cover substratum type, were recorded. Danionins found primarily warm (24–35° C), moving moderate clarity pH (6·6–8·2) there significant differences among speed. Deep‐bodied generally associated with faster currents than more slender‐bodied species. Gut content...
The viability of populations is influenced by driving forces such as density dependence and climate variability, but most population analyses (PVAs) ignore these factors because data limitations. Additionally, simplified PVAs produce limited measures annual growth rate (lamda) or extinction risk. Here we developed a "mechanistic" PVA threatened Chinook salmon (Oncorhynchus tshawytscha) in which, based on 40 years detailed data, related freshwater recruitment juveniles to spawners, third-year...
Large portions of anadromous salmonid habitat in the western United States has been lost because dams and other blockages. This loss potential to affect evolution through natural selection if is biased, affecting certain types differentially, phenotypic traits correlated with those are heritable. Habitat can also indirectly, by reducing genetic variation changing its distribution within among populations. In this paper, we compare characteristics habitats currently accessible review...
Abstract Local extirpations of Pacific salmon Oncorhynchus spp. and steelhead O. mykiss , often due to dams other stream barriers, are common throughout the western United States. Reestablishing salmonid populations in areas they historically occupied has substantial potential assist conservation efforts, but best practices for reintroduction not well established. In this paper, we present a framework planning reintroductions designed promote recovery salmonids listed under Endangered...
Climate change is likely to lead increasing population variability and extinction risk. Theoretically, greater diversity should buffer against rising climate variability, this theory often invoked as a reason for conservation. However, has rarely been quantified. Here we show how portfolio approach managing can inform metapopulation conservation priorities in changing world. We develop salmon model which productivity driven by spatially distributed thermal tolerance patterns of short-...
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...
Most hatchery programs for anadromous salmonids have been initiated to increase the numbers of fish harvest, mitigate habitat losses, or abundance in populations at low abundance. However, manner which these are implemented can significant impacts on evolutionary trajectory and long-term viability populations. In this paper, we review potential benefits risks relative conservation species listed under US Endangered Species Act. To illustrate, present range effects within a population as well...
Abstract Increased concern over climate change is demonstrated by the many efforts to assess effects and develop adaptation strategies. Scientists, resource managers, decision makers are increasingly expected use information, but they struggle with its uncertainty. With current proliferation of simulations downscaling methods, scientifically credible strategies for selecting a subset analysis making needed. Drawing on rich literature in science impact assessment experience working natural...
Summary 1. A key element of conservation planning is the extremely challenging task estimating likely effect restoration actions on population status. To compare relative benefits typical habitat Pacific salmon ( Oncorhynchus spp.), we modelled response an endangered Columbia River Chinook O. tshawytscha ) to changes in characteristics either targeted for or with potential be degraded. 2. We applied a spatially explicit, multiple life stage, Beverton‐Holt model evaluate how set variables...
Abstract Aquatic species are threatened by climate change but have received comparatively less attention than terrestrial species. We gleaned key strategies for scientists and managers seeking to address in aquatic conservation planning from the literature existing knowledge. 3 categories of effort that rely on scientific analysis particular application under U.S. Endangered Species Act (ESA): assessment overall risk a species; long‐term recovery planning; evaluation effects specific actions...
Abstract Although climate‐induced shifts in fish distribution have been widely reported at the population level, studies that account for ontogenetic and subregional differences when assessing responses are rare.In this study, groundfish distributional changes depth, latitude, longitude were assessed different size classes by species within nine subregions. We examined large, quality‐controlled datasets of depth‐stratified‐random bottom trawl surveys conducted during summer three large...
Abstract Delimiting intraspecific genetic variation in harvested species is crucial to the assessment of population status for natural resource management and conservation purposes. Here, we evaluated structure lingcod ( Ophiodon elongatus ), a commercially recreationally important fishery along west coast North America. We used 16,749 restriction site‐associated DNA sequencing (RADseq) markers, 611 individuals collected from across bulk range Southeast Alaska Baja California, Mexico. In...
Pigmentation patterns in vertebrates have become an important model for those interested mechanisms of pattern determination. I present detailed information on the development melanophore zebrafish, Danio rerio, five close relatives that species, and outgroup. The comparison ontogeny this group is first step towards understanding developmental basis interspecific variation. Pigment range from no distinct patterning at all to stripes differing numbers widths reticulated stripes. Species...
Abstract The combined effects of water diversion and climate change are a major conservation challenge for freshwater ecosystems. In the Lemhi Basin, Idaho (U.S.A.), causes changes in streamflow, will further affect streamflow temperature. Shifts temperature regimes can juvenile salmon growth, movement, survival. We examined potential on Chinook (Oncorhynchus tshawytscha), species listed as threatened under U.S. Endangered Species Act (ESA). To examine survival, we created model relating 19...
Abstract Objective Understanding the genetic structure of harvested fishery species is crucial for accurate stock assessments and effective management strategies. There have been several rangewide population analyses Pacific Hake Merluccius productus ; however, a thorough focus on heavily coastal off west coast North America missing. Recent observations spatial–temporal variability in life history migratory patterns brought into question whether this variation may be related to...
Summary 1. Conservation planning is often hampered by the lack of causal quantitative links between landscape characteristics, restoration actions and habitat conditions that impact status imperilled species. Here we present a first step toward linking on to population endangered stream‐type Chinook salmon ( Oncorhynchus tshawytscha ). 2. We developed relationships land use, characteristics freshwater spring in Wenatchee River basin. Available data allowed us find described water...