Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Publication Type
Articles 1 - 12 of 12
Full-Text Articles in Physical Sciences and Mathematics
Detrital Protein Contributes To Oyster Nutrition And Growth In The Damariscotta Estuary, Maine, Usa, Cheyenne M. Adams
Detrital Protein Contributes To Oyster Nutrition And Growth In The Damariscotta Estuary, Maine, Usa, Cheyenne M. Adams
Electronic Theses and Dissertations
Oyster aquaculture is an expanding industry that relies on identifying and utilizing natural estuarine conditions for the economically viable production of a filter-feeding crop. The eastern oyster, Crassostrea virginica, is the principal species currently cultured in Maine. In addition to preferentially consumed phytoplankton, various detrital complexes (non-algal and/or non-living organic matter) may provide some nutrition to C. virginica between times of phytoplankton abundance. Here I investigated the importance of detrital proteins in supporting the growth of oysters cultured in the upper Damariscotta Estuary. Oyster aquaculture in this area is highly successful and previous reports indicate that labile detrital protein …
Fish Passage At Intertidal Obstructions: Approaches In Washington State, Padraic Smith
Fish Passage At Intertidal Obstructions: Approaches In Washington State, Padraic Smith
Salish Sea Ecosystem Conference
Washington State has an active fish passage barrier correction program, with millions of dollars spent annually on fish passage barrier remediation. Tidal water crossing structures, including culverts, bridges, tidegates and control structures pose a unique problem for assessment and design for fish passage and estuarine habitat connectivity. Current fish passage criteria was developed primarily to allow adult salmon access to upstream spawning habitat and is based on adult fish swimming capabilities during the flow range expected during the period of migration. The hydrology of freshwater systems includes flooding periods that are infrequent and unpredictable. Tidal hydrology, on the other hand, …
Harbour Seals Consume More Juvenile And Adult Salmon In Estuaries Than Elsewhere In The Strait Of Georgia, Sheena Majewski, Chad Nordstrom, Austen C. Thomas, Andrew W. Trites
Harbour Seals Consume More Juvenile And Adult Salmon In Estuaries Than Elsewhere In The Strait Of Georgia, Sheena Majewski, Chad Nordstrom, Austen C. Thomas, Andrew W. Trites
Salish Sea Ecosystem Conference
Recent studies of harbour seal diets (2012-2014) have been used to estimate the amounts of salmon consumed by seals in the Strait of Georgia. However, these diet data have primarily come from estuary habitats, and may not be representative of all seals. We analysed 1,317 scat samples collected at an estuary (Cowichan Bay) and 7 non-estuary sites from Apr–Nov 2016 and Apr–May 2017 to compare salmon consumption inside and outside of estuaries. Using high-throughput DNA techniques, we determined seals consumed a wide range of prey (n = 238 species)—with gadids (primarily hake) and forage fish (primarily herring) dominating diets in …
Evaluating Common Trends In Chinook Density And The Influence Of Temperature And Salinity Patterns Among Distributary Channels In A Large River Estuary To Aid Evaluation, Planning, And Prioritization Of Restoration Activities, Joshua Chamberlin, Jason E. Hall, Todd Zackey, Frank Leonetti, Michael Rustay
Evaluating Common Trends In Chinook Density And The Influence Of Temperature And Salinity Patterns Among Distributary Channels In A Large River Estuary To Aid Evaluation, Planning, And Prioritization Of Restoration Activities, Joshua Chamberlin, Jason E. Hall, Todd Zackey, Frank Leonetti, Michael Rustay
Salish Sea Ecosystem Conference
Landscape context is critical in estuary restoration planning and assessment due to the complexity and size of estuaries, and the unique attributes and cumulative effects of individual restoration projects. In addition, the diversity and mobility of estuarine species, in particular juvenile salmon, highlights the importance of landscape position given certain locations in the delta are less accessible to salmon. The Snohomish River delta has been the focus of major estuary restoration efforts in recent years and efforts could result in the largest cumulative estuary restoration action in Puget Sound. While several large projects have been initiated/competed in recent years, information …
Density-Dependent And Landscape Effects Upon Estuary Rearing In Chinook Salmon: Insights From Long-Term Monitoring In Four Puget Sound Estuaries, Correigh M. Greene, Eric M. Beamer, Rich Henderson, Joshua Chamberlin, Jason Hall, Joseph H. Anderson, Matthew Pouley, Melanie Davis, Sayre Hodgson, Christopher Ellings
Density-Dependent And Landscape Effects Upon Estuary Rearing In Chinook Salmon: Insights From Long-Term Monitoring In Four Puget Sound Estuaries, Correigh M. Greene, Eric M. Beamer, Rich Henderson, Joshua Chamberlin, Jason Hall, Joseph H. Anderson, Matthew Pouley, Melanie Davis, Sayre Hodgson, Christopher Ellings
Salish Sea Ecosystem Conference
Juvenile Chinook salmon are well known for utilizing estuarine habitats within the tidal delta for rearing during outmigration. Several studies have linked population responses to availability of estuary habitat, and support the hypothesis that estuarine habitats are vital rearing areas for juvenile Chinook salmon. However, these coarse-scale studies provide little insight on how specific estuarine habitats contribute to rearing potential for salmon. We integrate long-term monitoring data from four estuaries of Puget Sound (Nooksack, Skagit, Snohomish, and Nisqually) to examine whether 1) Chinook populations in these rivers are limited by restricted estuary habitat, 2) hatchery releases can influence density dependent …
A Restoration And Climate Change Resiliency Monitoring Program For Coastal Bc Estuaries, Connie L. Miller Retzer, Thomas G. Reid, Peter K. Dekoning
A Restoration And Climate Change Resiliency Monitoring Program For Coastal Bc Estuaries, Connie L. Miller Retzer, Thomas G. Reid, Peter K. Dekoning
Salish Sea Ecosystem Conference
The Englishman River estuary and associated habitats, on the south east coast of Vancouver Island, has long been recognized as an important and productive ecosystem, supporting more than 250 bird species, all seven species of Pacific salmon, forage fish, at-risk plant communities and many other fish and wildlife species. The estuary is located within the Parksville/Qualicum Wildlife Management Area and is managed through the collaborative efforts of several ENGOs and government agencies. Last year, 2017, marked the first-year of a five-year restoration and monitoring program which aims to re-establish natural estuarine circulation patterns and restore intertidal and upland marsh habitat. …
Plant Community And Nutrient Development Within Four Estuary Restoration Sites In Kitsap County, Washington, Shannon Call, Jenise M. Bauman
Plant Community And Nutrient Development Within Four Estuary Restoration Sites In Kitsap County, Washington, Shannon Call, Jenise M. Bauman
Salish Sea Ecosystem Conference
Estuaries affected by physical barriers, such as culverts, experience reduced hydrological inputs and reduced connectivity resulting in the loss of ecological processes. To address reduction in ecological connectedness, culverts at three sites were removed and replaced with bridges. An observational field study was conducted in Kitsap County, Washington of three sites where culverts were replaced with bridges three, eight, and 13 years ago. Data was collected at a reference site where the estuary contains a culvert. It is hypothesized that estuary restoration will recover plant species, carbon sequestration, and nutrient cycling homogeneity above and below the restoration site. However, the …
An Investigation Of Benthic Recovery And Climate Change Resilience In The Englishman River Estuary, Connie L. Miller Retzer, Thomas G. Reid, Peter K. Dekoning
An Investigation Of Benthic Recovery And Climate Change Resilience In The Englishman River Estuary, Connie L. Miller Retzer, Thomas G. Reid, Peter K. Dekoning
Salish Sea Ecosystem Conference
SNAPSHOT: A benthic monitoring program will be added in 2018 to the ongoing Englishman River Estuary recovery study, situated on the east coast of Vancouver Island. This will complement investigations which have been ongoing, prior to and following the removal of a berm during 2017. Changes in salinity patterns, flow regimes, channel morphology, elevation, sediment size, and vegetation distribution are being assessed and these variables will be used to map distinctive areas of the estuary. Benthic samples will be collected from representative areas and monitored over the long term. Relative and total abundance, species diversity, biomass, and various derivatives of …
Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Residency And Early Growth In The Lower Fraser River Estuary, Lia Chalifour, David Scott, Misty Macduffee, John Dower, Julia Baum
Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Residency And Early Growth In The Lower Fraser River Estuary, Lia Chalifour, David Scott, Misty Macduffee, John Dower, Julia Baum
Salish Sea Ecosystem Conference
The Fraser River has historically supported the most abundant salmon runs in North America, which have been declining for decades. Despite its importance and ongoing threats of climate change and habitat degradation, the Fraser River estuary is particularly understudied, with the latest comprehensive fish survey occurring in the early 1980s. We were particularly interested in the role of estuarine habitat in supporting juvenile salmon during the critical outmigration period. As part of a two-year study, which surveyed 20 sites in the lower estuary across three habitat types, we sampled over 3,000 juvenile Chinook salmon. We caught the majority of all …
Fir Island Farm: Estuary Restoration Project: Designing For Climate Change And Uncertainty In Shoreline Flood Risk Reduction And Ecosystem Restoration Projects, David Cline
Salish Sea Ecosystem Conference
The recently designed and constructed Fir Island Farm – Estuary Restoration Project involves construction of a 1-mile long shoreline levee (dike) setback for restoration of 130 acres of farm land for tidal marsh estuary ecosystem restoration. The key uncertainty, and resiliency, design elements of concern include 1) selection of dike level of protection and design elevations considering climate change sea level rise projections, 2) inclusion of erosion protection measures, 3) farm drainage tailwater conditions and 4) ecosystem marsh vegetated plain future elevations and large woody debris loading conditions. This presentation discusses how site characterization, instrumentation, numerical modeling and monitoring were …
A Practical And Informative Sandpiper Monitoring Procedure For The Salish Sea, Ronald Ydenberg, Dov B. Lank, Richard Johnston, David Hope, Rachel Canham
A Practical And Informative Sandpiper Monitoring Procedure For The Salish Sea, Ronald Ydenberg, Dov B. Lank, Richard Johnston, David Hope, Rachel Canham
Salish Sea Ecosystem Conference
The Salish Sea contains important sites for shorebirds, including migrants and winter residents. There is a need for practical, informative and easily-applied monitoring procedures and goals. Counts at stopover sites are on their own uninformative, because they are strongly affected by factors unseen by local observers. A fall in the usage of a site might signal a global population decline, but could also be due to a reduction of that site’s quality, to an increase in site quality elsewhere such that some birds redistribute, or to changes in migratory behavior. A good framework for assessing the health of shorebird populations …
Divergent Trends In Migration Timing Of Shorebirds Along The Pacific Flyway, David Hope, Joseph Buchanan, Mary Anne Bishop, George Matz, Moira Lemon, Mark Drever
Divergent Trends In Migration Timing Of Shorebirds Along The Pacific Flyway, David Hope, Joseph Buchanan, Mary Anne Bishop, George Matz, Moira Lemon, Mark Drever
Salish Sea Ecosystem Conference
Long distant migrants timing their arrival on the breeding grounds must make the tradeoff of optimal timing for breeding vs. optimal timing for survival. For many shorebird species, the flyway northward spans thousands of kilometers, and both conditions encountered en route and the priorities of individuals can affect the timing of migration. We used data from spring migration surveys of Western Sandpipers (Calidris mauri) and Pacific Dunlins (Calidris alpina pacifica) along the Pacific Flyway of North America to determine if the timing of their northward movements changed from 1985 to 2016. We examined 5 sites of varying size along the …