A5029783376- Fish Ecology and Management Studies
- Marine and fisheries research
- Aquatic Invertebrate Ecology and Behavior
- Marine Bivalve and Aquaculture Studies
- Wildlife Ecology and Conservation
- Genetic and phenotypic traits in livestock
- Fish Biology and Ecology Studies
- Avian ecology and behavior
- Coral and Marine Ecosystems Studies
- Ecology and Vegetation Dynamics Studies
- Seed Germination and Physiology
- Water Quality and Resources Studies
- Genetic diversity and population structure
- Weed Control and Herbicide Applications
- Arctic and Antarctic ice dynamics
- Plant and animal studies
- Bayesian Methods and Mixture Models
- Physiological and biochemical adaptations
- Hydrology and Watershed Management Studies
- Animal Behavior and Reproduction
- Environmental DNA in Biodiversity Studies
- Allelopathy and phytotoxic interactions
- Complex Network Analysis Techniques
- Climate variability and models
- Biological Control of Invasive Species
NOAA National Marine Fisheries Service
2016-2025
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2016-2025
National Oceanic and Atmospheric Administration
2016-2025
Norwegian Polar Institute
2020
Japan Fisheries Research and Education Agency
2020
Universität Hamburg
2020
University of California, Santa Cruz
2007-2017
Mrag Americas (United States)
2009-2012
University of California System
2009-2011
Archbold Biological Station
2002
Recent research has highlighted the importance of interpopulation diversity in fostering stability population complexes. Here we focus on California’s recently collapsed fall-run Chinook salmon ( Oncorhynchus tshawytscha ) and ask whether portfolio effect induced buffering is observed across complexity hierarchy from individual populations to within a river basin (Sacramento, San Joaquin) entire Central Valley. Some was when comparing coefficient variation adult returns given with its...
Abstract Marine heatwaves are increasingly affecting marine ecosystems, with cascading impacts on coastal economies, communities, and food systems. Studies of provide crucial insights into potential ecosystem shifts under future climate change put fisheries social‐ecological systems through “stress tests” that expose both vulnerabilities resilience. The 2014–16 Northeast Pacific heatwave was the strongest longest record resulted in profound ecological changes impacted fisheries, management,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 511:237-248 (2014) - DOI: https://doi.org/10.3354/meps10934 Match-mismatch dynamics and relationship between ocean-entry timing relative ocean recoveries of Central Valley fall run Chinook salmon William H. Satterthwaite1,2,*, Stephanie M. Carlson3, Shanae D. Allen-Moran1, Simone Vincenzi2, Steven J. Bograd4,...
Abstract The California Central Valley contains the southernmost native populations of Chinook Salmon Oncorhynchus tshawytscha, which inhabit a highly variable, anthropogenically altered environment. To mitigate habitat loss and support fisheries, millions fall-run hatchery salmon are released each year, often transported downstream to avoid in-river mortality, with consequences not fully understood. We synthesize historical trends in release location timing (1941–2017), focusing on outcomes...
Abstract Steelhead Oncorhynchus mykiss display a dizzying array of life history variation (including the purely resident form, rainbow trout). We developed model for female steelhead in coastal California (close to southern boundary their range) small streams. combined proximate (physiological) and ultimate (expected reproductive success) considerations generalize notion threshold size emigration or maturity through development state‐dependent theory. The involves strategies that depend on...
Biocomplexity contributes to asynchronous population dynamics, buffering stock complexes in temporally variable environments, a phenomenon referred as “portfolio effect”. We previously revealed weakened but persistent portfolio effect California’s Central Valley fall-run Chinook salmon (Oncorhynchus tshawytscha), despite considerable degradation and loss of habitat. Here, we further explore the timing changes variability synchrony relate these factors hypothesized influence adult abundance,...
Ecologists are pressed to understand how climate constrains the timings of annual biological events (phenology). Climate influences on phenology likely significant in estuarine watersheds because many provide seasonal fish nurseries where juvenile presence is synched with favorable conditions. While ecologists have long recognized that estuaries generally important fish, we incompletely specific ecosystem dynamics contribute their nursery habitat value, limiting our ability identify and...
Abstract Species that migrate long distances or between distinct habitats— for example, anadromous catadromous fish—experience the consequences of climate change in each habitat and are therefore particularly at risk a changing world. Studies species often focus on freshwater despite ocean's disproportionate influence survival growth. To understand prominent species’ response to ocean climate, we use new spatio‐temporal model jointly estimating distribution all major fall‐run Chinook salmon...
Abstract Chinook salmon ( Oncorhynchus tshawytscha , Salmonidae) are foundational to social‐ecological systems of the Northeast Pacific Rim and exhibit a rich diversity life histories including in their adult migration timing, age at critical life‐history transitions marine feeding distributions. In recent decades have experienced declines across much native range; however, changes productivity abundance rarely been evaluated relation variation. To understand trends production, how they...
ABSTRACT Although the eco‐evolutionary consequences of dispersal and exploitation are increasingly recognised, consideration these effects how they interact for management conservation remains limited. We addressed this gap by examining population within a metapopulation framework, using Atlantic salmon as case study. compared alternative strategies incorporating selective based on life‐history traits spatial dimension (i.e., whether populations were net exporters or importers individuals)....
Abstract As global climate change and anthropogenic activities amplify widespread environmental variability, there is a strong need for management strategies that incorporate relationships between ecosystem components. This especially apparent when changes in drivers cause threshold responses (abrupt, nonlinear changes) ecosystems. Such ecological thresholds can provide useful reference points decisions. However, methods detecting empirical datasets may fail to find an existing threshold,...
We use a state dependent life history model to predict the strategies of female steelhead trout (Oncorhynchus mykiss) in altered environments. As case study broadly applicable approach, we applied this American and Mokelumne Rivers central California, where are listed as threatened. Both rivers have been drastically altered, with highly regulated flows translocations that may diluted local adaptation. Nevertheless, evolutionary optimization models could successfully displayed by fish on...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 454:221-235 (2012) - DOI: https://doi.org/10.3354/meps09539 Linking climate variability, productivity and stress demography in a long-lived seabird William H. Satterthwaite1,2,*, Alexander S. Kitaysky3, Marc Mangel2,4 1Marine Resources Assessment Group (MRAG) Americas, Capitola, California 95010, USA 2Center...
Abstract Managing weak stocks in mixed‐stock fisheries often relies on proxies derived from data‐rich indicator stocks, although there have been limited tests of the appropriateness such proxies. For example, full cohort reconstruction tagged Klamath River fall‐run Chinook Salmon Oncorhynchus tshawytscha northern California enables use detailed models to inform management. Information gained this stock is also used management untagged, threatened Coastal (CCC) stock, where it assumed that a...
Ocean fisheries often target and catch aggregations comprising multiple populations or groups of a given species. Chinook salmon (Oncorhynchus tshawytscha) originating from rivers throughout the west coast North America support mixed-stock ocean other ecosystem components, notably as prey for marine mammals. We construct first coastwide state-space model fall tagged fish released California to British Columbia between 1977 1990 estimate seasonal distribution along America. incorporate...
Abstract We tested the effect of temporal patterns in food supply on life history decisions coastal steelhead Oncorhynchus mykiss irideus from a Central California (CCC) population (Scott Creek) and Northern Valley (NCCV) (upper Sacramento River basin). manipulated growth through feeding experiments conducted May to following March using warm (2006 cohort) cool (2007 temperature regimes. Survival seawater challenges just before time typical juvenile emigration provided an index smolt versus...
Abstract Anadromous salmonids vary considerably in their age at ocean entry, timing of entry within a year, and the extent to which they use multiple habitat types freshwater. To better understand movement timing, we developed broadly applicable model state‐dependent movements among habitats, was parameterized based on case study steelhead Oncorhynchus mykiss California coastal watershed with seasonally closed lagoonal estuary. The correctly predicted population‐level patterns, including...
Among-individual heterogeneity in growth is a commonly observed phenomenon that has clear consequences for population and community dynamics yet proved difficult to quantify practice. In particular, among-individual variation can be link any given mechanism. Here, we develop Bayesian state-space framework modeling bridges the complexity of bioenergetic models statistical simplicity phenomenological models. The model allows intrinsic individual traits, shared environment, process...
The portfolio effect plays a critical role in population productivity and stability. Age structure of spawning salmon represents an example effects such that the risks experiencing unfavorable conditions are spread across time. However, distribution maturation ages for Pacific ( Oncorhynchus spp.) is increasingly concentrated into fewer younger ages, which may impact resilience to climate change. We explored dynamics Sacramento River fall-run Chinook O. tshawytscha) under different age...
Conservationists are continually seeking new strategies to reverse population declines and safeguard against species extinctions. Here we evaluate the potential efficacy of a recently proposed approach offset major anthropogenic threat many marine vertebrates: incidental bycatch in commercial fisheries operations. This approach, compensatory mitigation for (CMMB), is conceived as way replace or reduce mandated restrictions on fishing activities with (e.g., removal introduced predators from...
Abstract Oncorhynchus mykiss exhibit high plasticity in their life history patterns. Individual decisions are hypothesized to result from genetic thresholds shaped by local adaptation, with variation environmental factors influencing the trajectories of growth and condition (e.g., Fulton's K , lipid content). We compared rates patterns two coastal creeks (Scott Soquel) Central Valley (CV) rivers (American Mokelumne) California. The regions differed markedly habitat physical factors,...