Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Impacts Of Flow Releases On Invertebrate Drift And Juvenile Chinook Salmon Oncorhynchus Tshawytscha Diet On The Trinity River Below Lewiston Dam
Download Impacts Of Flow Releases On Invertebrate Drift And Juvenile Chinook Salmon Oncorhynchus Tshawytscha Diet On The Trinity River Below Lewiston Dam full books in PDF, epub, and Kindle. Read online Impacts Of Flow Releases On Invertebrate Drift And Juvenile Chinook Salmon Oncorhynchus Tshawytscha Diet On The Trinity River Below Lewiston Dam ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Impacts of Flow Releases on Invertebrate Drift and Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Diet on the Trinity River Below Lewiston Dam by : Thomas Starkey-Owens
Download or read book Impacts of Flow Releases on Invertebrate Drift and Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Diet on the Trinity River Below Lewiston Dam written by Thomas Starkey-Owens and published by . This book was released on 2020 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic macroinvertebrate (BMI) drift, species composition and abundance are specific to local hydrologic and habitat conditions, which can restrict or enhance availability to salmonids as a food resource. Currently, a knowledge gap exists on the Trinity River (northern California) in how flow releases from Lewiston Dam potentially impact BMI drift and feeding opportunities for juvenile salmonids. Samples of BMIs from drift, benthos, and diets of juvenile Chinook salmon (Oncorhynchus tshawytscha) were collected from two sites in the upper Trinity River February-April 2018, during stable flow conditions (~8 ) and two increased flow conditions peaking at ~50 . Chironomidae (Diptera) and Baetidae (Ephemeroptera) were dominant BMI taxa in the drift, benthos and diets. Although contributions to biomass were more even across BMI taxa in the drift, biomass consumed by fish was dominated by Chironomidae and Baetidae at both study sites. BMI taxonomic composition was more similar between benthic, drift and diet samples at the upstream study site below Lewiston Dam, whereas compositional similarities diverged during peak discharge conditions at the downstream study site. Although standardized drift rates (ex. mg/m3) did not increase with increased flow, the total export of BMI drift increased significantly with increased flow (p
Book Synopsis Response of Invertebrate Drift to Dam-release Restoration Pulse Flows from Lewiston Dam on the Trinity River, CA by : Jasmine S. Williamshen
Download or read book Response of Invertebrate Drift to Dam-release Restoration Pulse Flows from Lewiston Dam on the Trinity River, CA written by Jasmine S. Williamshen and published by . This book was released on 2021 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread construction of dams to regulate rivers has dramatically altered aquatic ecosystems, but these impoundments also provide a unique opportunity to support freshwater conservation goals by implementing functional flow regimes designed to mitigate dam-related impacts on fisheries. Drifting invertebrates are an important food source for stream-dwelling juvenile salmonids such that drift feeding can be an energetically profitable foraging strategy, yet the effect of streamflow alterations on invertebrate drift dynamics is largely undetermined. Drift net samples were collected on four days before and four days during the ascending limb (14-42 m3/s) of restoration pulse flows in April 2020 at four sites located along 48 river kilometers of the Trinity River downstream of Lewiston Dam in northern California. Results provide evidence of an inconsistent response by drifting invertebrate biomass concentration (mg/m3) across pulse flows with increases observed during the first pulse, but little effects or potential decreases in subsequent pulses. Drift response varied among sites, where the effect of pulse flows was greater at sites closer to the dam and that underwent longer durations without disturbance in the preceding months. Weighted mean length (mm) of drifting invertebrates was lower at higher flows, a trend that may be temporally driven by differing aquatic or terrestrial taxonomic groups dominating during base or pulse flows. These findings suggest that dam-release restoration flows can temporarily increase prey availability in the drift for juvenile salmonids, but the exploration of alternative restoration flow actions with meaningful long-term benefits to salmonid populations may be a more beneficial solution.
Book Synopsis Effects of Flow and Spill on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservior by :
Download or read book Effects of Flow and Spill on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservior written by and published by . This book was released on 1987 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Juvenile fall chinook salmon, Oncorhynchus tshawytscha, were freeze branded, coded wire tagged, and released into the Columbia River in the tailrace below McNary Dam during the summers of 1981--1983. The objectives of the study were to examine the effects of river flow on the passage time and migrational behavior of the juveniles and to subsequently assess any relationship to adult survival. This report details adult recovery data to June 1987. 2 refs., 11 tabs.
Book Synopsis Trinity River Fishery Restoration by :
Download or read book Trinity River Fishery Restoration written by and published by . This book was released on 2004 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir by :
Download or read book Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir written by and published by . This book was released on 1985 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a study to define the effects of instream flows on the passage time, migration behavior, and survival of phi age chinook salmon migrating through John Day Reservoir from June through August juvenile fish were tagged and released below McNary Dam in 1981. This report discusses adult returns through 1984. (ACR).
Book Synopsis Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir, 1981 Annual Report of Research by :
Download or read book Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir, 1981 Annual Report of Research written by and published by . This book was released on 1982 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was conducted by NMFS in 1981 to define the effects of instream flows on the passage time, survival, and migrational behavior of 0-age chinook salmon in John Day Reservoir. Fourteen groups (74,683 fish) of marked 0-age chinook salmon were wire-tagged, branded, and released into the tailrace at McNary Dam, fourteen groups (13,746 fish) were branded and released into the reservoir at River Kilometer 375, and 34 groups (14,273) were branded and released into the reservoir at various other sites. More than 55,000 0-age chinook salmon were sampled at the John Day Dam airlift facility. This sample included 623 mark recoveries. Four hundred and eight (408) additional marks were recovered from purse seine samples taken at various sites throughout the reservoir. The average passage time of marked 0-age chinook salmon released in the McNary trailrace was 22 days in 1981. There was no statistically significant evidence to indicate that instream flows affected either the rate of movement or residence time of 0-age chinook salmon in John Day Reservoir in 1981. 7 references, 1 figure, 12 tables.
Download or read book Record of Decision written by and published by . This book was released on 2000 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft Environmental Assessment written by and published by . This book was released on 1997 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lower Snake River Juvenile Salmon Migration Feasibility Report by :
Download or read book Lower Snake River Juvenile Salmon Migration Feasibility Report written by and published by . This book was released on 2002 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacts of the Elwha River Dam Removals on Chinook Salmon (Oncorhynchus Tshawytscha) Spawning Habitat by : Elizabeth Matteri
Download or read book Impacts of the Elwha River Dam Removals on Chinook Salmon (Oncorhynchus Tshawytscha) Spawning Habitat written by Elizabeth Matteri and published by . This book was released on 2021 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Streambed particle size is a key factor influencing Chinook salmon (Oncorhynchus tshawytscha) spawning site suitability. Both the construction and removal of dams alter the sediment in rivers, resulting in changes to suitable habitat for salmon. When in place, dams impede the movement of sediment, resulting in an accumulation of sediment above the dam and a degradation of the riverbed below the dam. The release of this accumulated sediment after dam removal can restore a more natural distribution of sediment size classes below the dam, potentially improving salmon spawning habitat. Dam removal for the purpose of river restoration and improving conditions for salmon has increased in recent decades. The purpose of this study is to assess the effects of the sediment released from two large dam removals on the Elwha River in Washington state on streambed particle size, and the resultant amount of suitable spawnable habitat for Chinook salmon. Pebble counts were conducted in 45 riffles in 2009, before dam removal, and in 21 riffles in 2015, after dam removal, in the mainstem of the Lower and Middle sections of the Elwha River. The fraction of movable particles by a spawning Chinook salmon in the riffle crests increased by 43% after dam removal, resulting in more suitable spawning habitat. After dam removal, there was greater variation in sediment size within riffle crests, whereas there were predominantly larger particles before dam removal. The positive changes in sediment measured in this project support the concept that dam removal is a meaningful strategy for salmon restoration.
Book Synopsis Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservior, 1982 Annual Report of Research by :
Download or read book Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservior, 1982 Annual Report of Research written by and published by . This book was released on 1983 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service in cooperation with the Bonneville Power Administration is conducting a 6-year study of the effects of instream flows on the passage time, survival, and migrational behavior of juvenile fall and summer (O-age) chinook salmon in John Day Reservoir. In 1982, the second year of the study, research activities concentrated on refining distribution and behavior data in John Day Reservoir and on releasing and recapturing marked fish needed to define flow/travel time relationships. Twenty-two groups (61,887 fish) of marked O-age chinook salmon were wire-tagged, branded, and released into the tailrace at McNary Dam, and forty-four groups (13,128 fish) were branded and released into the reservoir at various other sites. Sampling at the John Day Dam airlift facility captured 54,647 subyearling chinook salmon including 482 marked recoveries. Additional marks (279) were recovered from purse seine samples taken at various sites throughout the reservoir. The average passage time to John Day Dam for marked O-age chinook salmon released in the McNary tailrace was 23 days. Weekend flow reductions at McNary Dam did not affect passage time of subyearling chinook salmon in John Day Reservoir. There was no statistical evidence to indicate that instream flows affected either the rate of movement or residence time of O-age chinook salmon in John Day Reservoir.
Book Synopsis Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir by :
Download or read book Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir written by and published by . This book was released on 1984 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of instream river flow on the passage time, survival, and migrational behavior of juvenile fall and summer (O-age) chinook salmon in John Day Reservoir is being studied. In 1983, the final year of juvenile sampling in the reservoir, research activities continued to refine flow/travel time relationships and distributional behavior of O-age chinook salmon. Fifteen groups (72,559 fish) of marked O-age chinook salmon were wire-tagged, branded, and released into the tailrace at McNary Dam, and thirty-two groups (22,206 fish) were branded and released into the reservoir at various other sites. Sampling at John Day Dam, utilizing the airlift pump system in the B and C slots of Turbine Intake Unit 3, captured 82,698 subyearling chinook salmon including 640 mark recoveries. Additional marks (458) were recovered from purse seine samples taken at various sites throughout the reservoir. Weekly mean fork lengths of O-age chinook salmon captured at McNary and John fsm Dams and in the reservoir by purse seine ranged from 103 mm in mid-June to 166 mm in mid-December. Fish captured at the John Day Dam monitoring facility and by purse seine throughout the reservoir were in excellent condition. Preliminary analysis of stomach samples taken in 1982 and 1983 from purse seine catches indicates active feeding is taking place. The average passage time of the fastest moving marked O-age chinook salmon from McNary Dam to John Day Dam was 11 days (based on 25th percentile of mark recaptures). The average reservoir residence time was 22 days. Regression analysis was used to develop a description of the relationship of river flow to the rate of downstream movement of O-age chinook salmon in John Day Reservoir in 1983. The slope of this line and the correlation coefficient (R) were not significantly different from zero.
Book Synopsis Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir by : Carl W. Sims
Download or read book Effects of Flow on the Migratory Behavior and Survival of Juvenile Fall and Summer Chinook Salmon in John Day Reservoir written by Carl W. Sims and published by . This book was released on 1982 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Flow on Performance and Behavior of Chinook Salmon in Fishways by : Clark S. Thompson
Download or read book Effect of Flow on Performance and Behavior of Chinook Salmon in Fishways written by Clark S. Thompson and published by . This book was released on 1970 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Discharge Alterations on Juvenile Chinook Salmon, Oncorhynchus Tshawytscha by : Steven Wayne Krueger
Download or read book Effects of Discharge Alterations on Juvenile Chinook Salmon, Oncorhynchus Tshawytscha written by Steven Wayne Krueger and published by . This book was released on 1979 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interactive Effects of Non-native Predators and Anthropogenic Habitat Alterations on Native Juvenile Salmon by : Megan Christine Sabal
Download or read book Interactive Effects of Non-native Predators and Anthropogenic Habitat Alterations on Native Juvenile Salmon written by Megan Christine Sabal and published by . This book was released on 2014 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple human stressors including non-native species and habitat alterations can interact with complex consequences on native species. Human-modified habitats can change non-native predator functional and aggregative responses with additive impacts on native prey species. I assessed how the non-native predator, striped bass (Morone saxatilis), and habitat alterations (small diversion dam and other altered habitats) interact to influence mortality on native juvenile Chinook salmon (Oncorhynchus tshawytscha) migrating to sea on the lower Mokelumne River, CA (USA). Relative abundance and diet surveys across natural and human-altered habitats assessed functional and aggregative responses of striped bass. Striped bass showed elevated per capita consumption of juvenile salmon and behavioral aggregation (estimated as catch per unit effort - CPUE) at a small diversion dam site (Woodbridge Irrigation District Dam: per capita consumption= 3.54 juvenile salmon per striped bass and CPUE= 0.189) over other altered (0 juvenile salmon per striped bass; CPUE= 0.0024) and natural habitats (N/A; CPUE= 0.0003) creating a localized area of heightened predation. At this predation hotspot, experimental predator removals, diet energetic analysis, and before-after impact assessment estimated striped bass consumption of the population of out-migrating juvenile salmon to be between 10-29%. Striped bass per capita consumption rates among the three approaches were 0.92%, 1.01-1.11%, and 0.96-1.11% respectively. This study highlights how interactions between multiple stressors can exacerbate consequences for native species and are important to examine when predicting ecological impacts from stressors and planning local management strategies.
Book Synopsis Inland Fishes of California by : Peter B. Moyle
Download or read book Inland Fishes of California written by Peter B. Moyle and published by Univ of California Press. This book was released on 2002-05-21 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
