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Predictions Of Coho Salmon Oncorhynchus Kisutch Population Abundance In The Clearwater River Washington Using Various Habitat Rating Scenarios Of The Ecosystem Diagnosis And Treatment Model
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Book Synopsis Predictions of Coho Salmon (Oncorhynchus Kisutch) Population Abundance in the Clearwater River, Washington Using Various Habitat-rating Scenarios of the Ecosystem Diagnosis and Treatment Model by : Lawrence G. Dominguez
Download or read book Predictions of Coho Salmon (Oncorhynchus Kisutch) Population Abundance in the Clearwater River, Washington Using Various Habitat-rating Scenarios of the Ecosystem Diagnosis and Treatment Model written by Lawrence G. Dominguez and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Identification of Physical Habitats Limiting the Production of Coho Salmon in Western Oregon and Washington by : Gordon H. Reeves
Download or read book Identification of Physical Habitats Limiting the Production of Coho Salmon in Western Oregon and Washington written by Gordon H. Reeves and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Suitability Index Models by : Thomas E. McMahon
Download or read book Habitat Suitability Index Models written by Thomas E. McMahon and published by . This book was released on 1983 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Endangered and Threatened Species ; Threatened Status for Southern Oregon/Northern California Coast Evolutionarily Significant Unit (ESU) of Coho Salmon by :
Download or read book Endangered and Threatened Species ; Threatened Status for Southern Oregon/Northern California Coast Evolutionarily Significant Unit (ESU) of Coho Salmon written by and published by . This book was released on 1997 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicting Spawning Habitat for Coho Salmon (Oncorhynchus Kisutch), Chinook Salmon (Oncorhynchus Tshawytscha), and Steelhead (Oncorhynchus Mykiss) Using Geospatially Constructed Stream Morphology from High-resolution Lidar-derived Digital Elevation Model and Field Survey Data in the Indian Creek Watershed, Mendocino County, California by : Justin P. Bissell
Download or read book Predicting Spawning Habitat for Coho Salmon (Oncorhynchus Kisutch), Chinook Salmon (Oncorhynchus Tshawytscha), and Steelhead (Oncorhynchus Mykiss) Using Geospatially Constructed Stream Morphology from High-resolution Lidar-derived Digital Elevation Model and Field Survey Data in the Indian Creek Watershed, Mendocino County, California written by Justin P. Bissell and published by . This book was released on 2019 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Restoration of anadromous salmonid habitat is of primary importance to the economic, historical, and cultural geography of the Pacific Northwest. Derivation and use of geospatial habitat models as guides to pinpoint key areas where limited restoration funding can be cost-effectively employed is of great importance. To this purpose, 1 meter resolution lidar-derived Digital Elevation Model data was acquired for the Indian Creek and neighboring watersheds in Mendocino County, California, and used together with field-acquired geomorphic stream data to geospatially model stream widths, depths, and streambank morphology. These geospatial covariates were field-verified in selected locations and then used in conjunction with field surveyed habitat presence data and substrate data to model potential anadromous salmonid species spawning habitat. Probability surfaces, each comprising the areal extent of the Indian Creek stream system and representing the probability for spawning habitat occurrence, were developed for each of the species of interest. The mean area under the curve (AUC) for 100 model replications for Chinook, Coho, and Steelhead were 0.954, 0.951, and 0.958, with standard deviations of 0.036, 0.034, and 0.036, respectively. In contrast to other models that solely use linear lengths of stream, the models developed in this work incorporate modeled stream bankfull widths and modeled stream corridor morphology, thus allowing additional interpretation and prediction involving the amount of species' use of specific streams and watersheds. Models were field-verified by California Department of Fish and Wildlife fisheries biologist staff and Pacific Watershed Associates engineering geologists and field scientist staff as being representative of actual field conditions, thus assuring the value of modeling results and methodology in future projects and research.
Book Synopsis The Influence of Habitat Characteristics on Abundance and Growth of Juvenile Coho Salmon Oncorhynchus Kisutch in Constructed Habitats in the Middle Klamath River Basin by : Michelle R. Krall
Download or read book The Influence of Habitat Characteristics on Abundance and Growth of Juvenile Coho Salmon Oncorhynchus Kisutch in Constructed Habitats in the Middle Klamath River Basin written by Michelle R. Krall and published by . This book was released on 2016 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Substantial investment has been directed toward construction of off-channel ponds in the middle Klamath River basin to benefit Coho Salmon populations. Previous research showed that abundance, retention, and growth of juvenile Coho Salmon varied across sites but were not consistently different between constructed ponds and natural habitats; instead, variation was attributed to individual site characteristics. However, the characteristics responsible for these differences are not clear. In this exploratory study, I investigated the effect of accessibility on juvenile Coho Salmon abundance within nine constructed ponds. I also assessed whether habitat conditions, Coho Salmon density, and food availability within the ponds could predict abundance, retention, and growth of Coho Salmon. Few strong relationships were found between characteristics of ponds and the response variables. Despite potentially stressful conditions at some sites, Coho Salmon occupied most ponds through the summer, suggesting that they provide suitable rearing habitats. Lack of accessibility throughout the year had potentially important effects on the survival and life history of individuals trapped in constructed ponds. Retention rates were strongly correlated with zooplankton availability, while Coho Salmon density and available benthic prey displayed little correlation with retention. While growth rate differed among ponds; while measures of prey availability did not explain variation in growth rate, growth rate was negatively correlated with Coho Salmon density in the ponds. Constructed off-channel ponds serve as important rearing habitat for Coho Salmon and an increased understanding of their role in Coho Salmon rearing and production is necessary.
Book Synopsis A Population Model for Coho Salmon (Onchorhynchus Kisutch) in Freshwater Creek by : Gabriel Scheer
Download or read book A Population Model for Coho Salmon (Onchorhynchus Kisutch) in Freshwater Creek written by Gabriel Scheer and published by . This book was released on 2017 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historic land use practices and associated habitat degradation have led to significant declines in coho salmon (Oncorhynchus kisutch ) populations across their range. In California they are a state and federally listed species, requiring population monitoring and management plans tailored towards recovery. Traditionally, juvenile coho salmon in California were thought to spend approximately one year in their natal freshwater habitats before migrating to sea the following spring and summer as smolts. However, recent work has documented considerable variation in juvenile life history and migration timing. Specifically, juveniles that migrate downstream prior to one year of age and spend their winter rearing in estuary habitat have been shown to produce significant adult returns. Using 14 years of life-stage-specific survival and movement data collected on Freshwater Creek in northern California, I constructed a habitat-base life cycle model to evaluate expected population response to restoration actions, and to incorporate life history diversity into population projections. This modeling effort is divided into three sections: (1) parameterize stage specific survival rates and probability of expressing an early emigrant life history; (2) conduct sensitivity analysis to quantify which life stages are most influential in determining population status; (3) use stochastic simulations to quantitatively evaluate how population dynamics and extinction risk are affected by inclusion of life history diversity and alternative restoration scenarios. The resulting analyses showed that, across locations and years, between 3-29% of juvenile coho are early migrants to the stream estuary ecotone during their first winter. The majority of early migrants originated in the main-stem reaches lower in the watershed. Subsequent sensitivity analysis identified marine survival and smolt emigrant overwinter survival as highly influential in the long-term trends for this population. While the proportion of individuals expressing an 'early emigrant' life history variant is significant, this strategy showed low sensitivity relative to other life stages in defining long-term population growth under this modeling construct. In contrast, 50-year population simulations showed significant gains in adult escapement up to 43% when early emigrant life histories were included. This suggests that while alternative life history variants may not be the single greatest driver of population growth, their exclusion in management models may constitute a significant oversight in population management. Additionally, the probability of local population extinction was reduced substantially from 36% to 8% with the incorporation of life history diversity in the modeling structure. Historic coho salmon rearing habitats have been vastly diminished during the last 100 years in both stream and estuary areas. This modeling approach can help to identify sites to focus habitat restoration where it can strengthen individual populations' long-term growth or abilities to persist in the face of environmental stochasticity.
Book Synopsis Recolonization Potential for Coho Salmon (Oncorhynchus Kisutch) in Tributaries to the Klamath River After Dam Removal by : Max M. Ramos
Download or read book Recolonization Potential for Coho Salmon (Oncorhynchus Kisutch) in Tributaries to the Klamath River After Dam Removal written by Max M. Ramos and published by . This book was released on 2020 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Removal of four major dams on the Klamath River is scheduled to begin in 2023, restoring access to greater than 50 km of historic mainstem habitat for coho salmon. However, mainstem habitat may not be suitable for juvenile coho salmon due to elevated water temperatures and high concentrations of infectious myxospores in the summer and fast water velocities in the winter. Small, cooler tributaries can provide essential habitat for escape from deleterious conditions in the mainstem Klamath River. I used temperature and other physical features of six tributaries to the Klamath River above Iron Gate Dam to assess their capacity to support juvenile coho salmon following dam removal. I applied the Habitat Limiting Factors and Intrinsic Potential models to tributaries above Iron Gate Dam to estimate potential capacity. I also developed an occupancy model using data from reference tributaries below the dam and from other nearby watersheds to estimate the potential distribution of juvenile coho salmon in tributaries above Iron Gate Dam. I found that the six newly accessible tributary streams will provide greater than 26 km of accessible rearing habitat. Most streams had summer temperature suitable for coho salmon, with maximum weekly maximum and maximum weekly average temperatures ranging from 13.2 °C to 24.0°C and 12.0 °C to 20.7 °C respectively. The Habitat Limit Factors model estimated that the streams could support up to 105,000 juvenile coho salmon in the summer, with most of this capacity (66,300 individuals) in Spencer Creek (note that predicted capacity is not a prediction of actual production following dam removal). Four out of the six streams exhibited high intrinsic potential, particularly near their confluences with the Klamath River. In reference streams, coho salmon occupancy ranged from 0.41-0.44 of available habitat. I found that the probability of summertime occupancy by juvenile coho salmon was positively correlated with percent instream cover, surface area, and nearby coho salmon hatchery production. Applying these relationships to the study streams, Scotch, Jenny, Fall, Shovel, and Spencer creeks exhibited 0.48, 0.50, 0.53, 0.46, and 0.61 mean occupancy probability respectively. I also found that Scotch, Jenny, Fall, Shovel, and Spencer creeks contained 26%, 2%, 7%, 2%, and 46% by surface area of suitable spawning gravels for adult coho salmon. Based on model predictions and a large quantity of suitable habitat for coho salmon habitat, Spencer Creek should be prioritized for restoration and protection. While Spencer Creek contains a large quantity of suitable habitat for coho salmon, I identified limited spawning and rearing habitat in Jenny, Fall, and Shovel creeks suggesting a need for habitat restoration.
Book Synopsis What Salmon Biologists Say about the Status of Wild Coho Salmon (Oncorhynchus Kisutch) Runs and Their Habitat Conditions in Large Western Washington Rivers: an Opinion Survey by : C.J. Cederholm
Download or read book What Salmon Biologists Say about the Status of Wild Coho Salmon (Oncorhynchus Kisutch) Runs and Their Habitat Conditions in Large Western Washington Rivers: an Opinion Survey written by C.J. Cederholm and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Landscape Approach to Determining and Predicting Juvenile Coho Salmon (Oncorhynchus Kisutch) Movement Timing and Growth Patterns Prior to Ocean Entry by :
Download or read book A Landscape Approach to Determining and Predicting Juvenile Coho Salmon (Oncorhynchus Kisutch) Movement Timing and Growth Patterns Prior to Ocean Entry written by and published by . This book was released on 2016 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon (Oncorhynchus kisutch) rely on unique habitats during the winter season, which may dictate how much individuals may growth and when migration from freshwater rearing habitat to the ocean occurs. Here I analyze movement timing and growth patterns for coho salmon through a field-based study and a literature review. For the field portion, I examined hatchery-stocked juvenile coho salmon across four stream basins in the Russian River watershed, California to determine the relative importance of climate, landscape, and fish size metrics in predicting movement and growth patterns over a winter rearing and spring smolt outmigration time period (December 2014-June 2015). I observed three unique movement strategies: winter parr movement, spring smolt movement, and inter-tributary movement. Movement was predicted in relation to daily temperature and precipitation, followed by in-stream and upslope basin conditions in random forest modeling. Specifically, fish that moved later were associated with basins that contained higher productivity and low-gradient floodplain habitats, while fish that moved earlier came from streams that lacked invertebrate prey and had limited low-gradient rearing habitat. Fish size and timing of movement were the primary predictors of growth, with relatively larger fish in the spring growing faster than fish that were relatively smaller prior to winter. These relationships suggest that hatchery-release fish are still highly influenced by environmental conditions once released, especially in terms of initial seasonal movement, and that watershed conditions should be considered when utilizing hatchery-rearing programs to supplement wild fish populations. In North America, coho salmon populations are distributed from Alaska through California, and may exhibit unique movement and growth patterns in relationship to population-scale vulnerability (Endangered Species Act listing), basin area, and availability and types of rearing habitat. For the second part of my thesis, I conducted a literature review to assess what factors are commonly considered in predicting movement and growth patterns for these fish, as well as the types (season and life stage) and number of movement strategies reported. Eighteen studies were summarized, of which sixteen identified unique movement strategies, ranging from one to four. Despite a wide range of basin areas and latitudes, winter parr and spring smolt movements were commonly observed, with authors primarily relating these behaviors to in-stream habitat and fish size metrics. Additionally, growth was linked positively and primarily with off-channel winter rearing, which may outweigh the importance of fish size in predicting growth when high quality rearing habitats are available during the winter season. Recognizing movement timing diversity and its drivers can help recover threatened coho salmon populations. More widely distributed populations may have unique phenotypic expressions based on localized genetic and environmental interactions, increasing diversity and overall stability across the population, a concept known as the portfolio effect. Understanding fish-habitat relationships can aid recovery efforts by providing a framework of climatic and watershed conditions that support unique behaviors, even in already severely limited populations.
Book Synopsis An Analysis of Factors Affecting the Production of Coho Salmon (Oncorhynchus Kisutch) in the Columbia River by : Percy Matthieu Washington
Download or read book An Analysis of Factors Affecting the Production of Coho Salmon (Oncorhynchus Kisutch) in the Columbia River written by Percy Matthieu Washington and published by . This book was released on 1982 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Longitudinal Distribution Patterns and Habitat Associations of Juvenile Coho Salmon Oncorhynchus Kisutch in Tributaries of the Little Susitna River, Alaska by : Kevin Michael Foley
Download or read book Longitudinal Distribution Patterns and Habitat Associations of Juvenile Coho Salmon Oncorhynchus Kisutch in Tributaries of the Little Susitna River, Alaska written by Kevin Michael Foley and published by . This book was released on 2014 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding how headwater streams function as rearing habitats for juvenile coho salmon Oncorhynchus kisutch is essential for effective population management and conservation. To inform habitat restoration activities within the Matanuska-Susitna Valley, Alaska, I determined upstream distribution limits, validated abundance estimates, and established fish habitat relationships in two headwater stream tributaries of the Little Susitna River in 2010-11. Using a low-effort, spatially continuous sampling approach and linear mixed-effects models, I related local- and landscape-scale habitat associations to abundance estimates. All-aged coho salmon composed approximately 98% of all fish sampled and inhabited the entire stream length to their upstream limits. Age-1+ fish resided in 64% and 44% of the stream length for the two sampled streams. The mean upstream elevation limit for all-aged fish in these streams was 278m and 267m. For age- 1+ fish, the upstream elevation limit in the two streams was 275m and 238m. Percent slope at the distribution limit of all-aged fish was consistent across streams at 5%, whereas percent slope for age-1+ fish correspond to 4% and 6%. Elevation and percent slope consistently described upstream distribution limits among age classes. Therefore, we must consider these landscape features when prioritizing restoration projects in headwater streams.
Book Synopsis Influence of Habitat on Smolt Production in Coho Salmon (Oncorhynchus Kisutch) in Fourteen Western Washington Streams by : Rishi Sharma
Download or read book Influence of Habitat on Smolt Production in Coho Salmon (Oncorhynchus Kisutch) in Fourteen Western Washington Streams written by Rishi Sharma and published by . This book was released on 1998 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Species Profiles by : Thomas J. Hassler
Download or read book Species Profiles written by Thomas J. Hassler and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Viability of Coho Salmon Oncorhynchus Kisutch in Relation to Streamflow Regulation in Terrell Creek, Washington by : Ryan S. Vasak
Download or read book Viability of Coho Salmon Oncorhynchus Kisutch in Relation to Streamflow Regulation in Terrell Creek, Washington written by Ryan S. Vasak and published by . This book was released on 2010 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spawning Site Selection of Coho Salmon Oncorhynchus Kisutch in Susitna River Tributaries, Alaska by : Betsy W. McCracken
Download or read book Spawning Site Selection of Coho Salmon Oncorhynchus Kisutch in Susitna River Tributaries, Alaska written by Betsy W. McCracken and published by . This book was released on 2021 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho Salmon Oncorhynchus kisutch are the most widely distributed Pacific salmon species across Alaska. The lack of knowledge surrounding the habitat requirements of this species results in challenges for conservation and management due to natural and anthropogenic pressures. Tributaries of the Susitna River drainage in Alaska support many small and distinct Coho Salmon populations. Heterogeneity of in-stream spawning habitat is an ecological concept known to promote resiliency of salmonid populations. The goal of this study was to investigate the best habitat predictors of spawning site selection and the scale by which spawning habitat should be evaluated for management insights. Scale is particularly important when measuring, assessing, and predicting potential impacts to species from development activities because habitat research at the stream rather than the reach scale can overestimate the amount of available spawning habitat. I investigated a suite of field-measured stream habitat variables paired with empirical Coho Salmon spawning survey data in five tributaries during 2013 and 2014. Physical data was defined as biotic and abiotic surroundings of an organism or population that have an influence on survival, development, and evolution. Mixed-effects modeling results indicated that Coho Salmon spawning-site selection was positively related to gravel substrate and the presence of groundwater flux, and that spawning Coho Salmon avoided cobble substrate. Physical data were analyzed at both the stream and reach scales, and mixed-effects modeling results further concluded that variation in spawning activity at the reach scale (variance = 1.34, SD = 1.16) accounted for more variability and was more predictive than at the stream scale(variance = 0.04, SD = 0.19). This is important because fish habitat-associations identified at the reach scale were not identified at the stream scale. These results highlight the need for multi-scale habitat data collections and analyses to identify the most meaningful fish-habitat associations.
Book Synopsis Energetic, Morphological and Reproductive Traits in a Recently Introduced Population of Coho Salmon (Oncorhynchus Kisutch) from the Wenatchee River, Washington by : Matthew Bradley Collins
Download or read book Energetic, Morphological and Reproductive Traits in a Recently Introduced Population of Coho Salmon (Oncorhynchus Kisutch) from the Wenatchee River, Washington written by Matthew Bradley Collins and published by . This book was released on 2006 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
