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Rainbow Trout Oncorhynchus Mykiss Summer Habitat Use In Lake Spokane Washington
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Book Synopsis Rainbow Trout (Oncorhynchus Mykiss) Summer Habitat Use in Lake Spokane, Washington by : Shawna B. Warehime
Download or read book Rainbow Trout (Oncorhynchus Mykiss) Summer Habitat Use in Lake Spokane, Washington written by Shawna B. Warehime and published by . This book was released on 2018 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Construction of dams dramatically alters the hydrology of rivers, influencing a wide variety of water quality characteristics directly impacting fish species. These physical alterations will interact with increasing temperatures, due to climate change, reducing thermal habitat for cold-water fish species. Rainbow Trout are sensitive to changes in their habitat and prefer water temperatures
Book Synopsis Summer Habitat Use and Prey Selection of Hatchery Rainbow Trout in Twin Lakes, Washington by : David Christensen (Fisheries biologist)
Download or read book Summer Habitat Use and Prey Selection of Hatchery Rainbow Trout in Twin Lakes, Washington written by David Christensen (Fisheries biologist) and published by . This book was released on 2008 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: "We examined depth, temperature and dissolved oxygen (DO) selection for ten hatchery redband rainbow trout (Oncorhynchus mykiss gairdneri) tagged with pressure sensitive ultrasonic transmitters during summer stratification in Twin Lakes, Washington, 2007. Hydroacoustic sonar was also utilized to evaluate spatial habitat use of trout populations in general. We also examined stomach contents and determined the relative weight (Wr) of 106 and 248 coastal rainbow trout (Oncorhynchus mykiss irideus) during the summer of 2004 and 2005, respectively. Densities of Daphnia pulicaria and chaoborids, major diet constituents of rainbow trout were also determined. Tagged trout selected depths within or near the metalimnion where temperatures where 20° C and DO was 4 mg/L during July and early August when stratification was the greatest. When temperatures were less than 20° C, tagged fish dispersed throughout the epi- and metalimnion. During stratification, 77% of trout identified with hydroacoustic sonar were located within the metalimnion. In September, when temperatures were
Book Synopsis Lake Roosevelt Rainbow Trout Habitat by :
Download or read book Lake Roosevelt Rainbow Trout Habitat written by and published by . This book was released on 2004 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The construction of Chief Joseph and Grand Coulee Dams completely and irrevocably blocked anadromous fish migrations to the Upper Columbia River. Historically this area hosted vast numbers of salmon returning to their natal waters to reproduce and die. For the native peoples of the region, salmon and steelhead were a principle food source, providing physical nourishment and spiritual sustenance, and contributing to the religious practices and the cultural basis of tribal communities. The decaying remains of spawned-out salmon carcasses contributed untold amounts of nutrients into the aquatic, aerial, and terrestrial ecosystems of tributary habitats in the upper basin. Near the present site of Kettle Falls, Washington, the second largest Indian fishery in the state existed for thousands of years. Returning salmon were caught in nets and baskets or speared on their migration to the headwater of the Columbia River in British Columbia. Catch estimates at Kettle Falls range from 600,000 in 1940 to two (2) million around the turn of the century (UCUT, Report No. 2). The loss of anadromous fish limited the opportunities for fisheries management and enhancement exclusively to those actions addressed to resident fish. The Lake Roosevelt Rainbow Trout Habitat/Passage Improvement Project is a mitigation project intended to enhance resident fish populations and to partially mitigate for anadromous fish losses caused by hydropower system impacts. This substitution of resident fish for anadromous fish losses is considered in-place and out-of-kind mitigation. Upstream migration and passage barriers limit the amount of spawning and rearing habitat that might otherwise be utilized by rainbow trout. The results of even limited stream surveys and habitat inventories indicated that a potential for increased natural production exists. However, the lack of any comprehensive enhancement measures prompted the Upper Columbia United Tribes Fisheries Center (UCUT), Colville Confederated Tribes (CCT), Spokane Tribe of Indians (STI) and Washington Department of Fish and Wildlife (WDFW) to develop and propose a comprehensive fishery management plan for Lake Roosevelt. The Rainbow Trout Habitat/Passage Improvement Project (LRHIP) was designed with goals directed towards increasing natural production while maintaining genetic integrity among current tributary stocks. The initial phase of the Lake Roosevelt Habitat Improvement Project (Phase I, baseline data collection: 1990-91) was focused on the assessment of limiting factors, including the quality and quantity of available spawning gravel, identification of passage barriers, and assessment of other constraints. After the initial assessment of stream parameters, five streams meeting specific criteria were selected for habitat/passage improvement projects (Phase II, implementation -1992-1995). Four of these projects were on the Colville Indian Reservation South Nanamkin, North Nanamkin, Louie and Iron Creeks and one Blue Creek was on the Spokane Indian Reservation. At the completion of project habitat improvements, the final phase (Phase III, monitoring-1996-2000) began. This phase assessed the changes and determined the success achieved through the improvements. Data analysis showed that passage improvements are successful for increasing habitat availability and use. The results of in-stream habitat improvements were inconclusive. Project streams, to the last monitoring date, have shown increases in fish density following implementation of the improvements. In 2000 Bridge Creek, on the Colville Reservation was selected for the next phase of improvements. Data collection, including baseline stream survey and population data collection, was carried out during 2001 in preparation for the design and implementation of stream habitat/passage improvements. Agencies cooperating on the project include the Colville Confederated Tribes (CCT), Natural Resource Conservation Service (NRCS, Ferry County District), Ferry County Conservation District, and Ferry County. The Bonneville Power Administration (BPA) provided project funding support and program integration assistance. A stock of redband rainbow trout, were discovered in 2001 in an isolated section of Bridge Creek above a set of waterfalls. DNA microsatellite analysis was conducted at the University of Idaho and indicated that very little if any hybridization. The targeted species in the genetic analysis was red band/rainbow trout (Oncorhynchus mykiss spp.). The sub-contract is with Madison Powell and Joyce Faler at the Center for Salmonid and Freshwater Species at Risk at the University of Idaho/HFCES. DNA analysis used mitochondrial and nuclear RFLP markers along with two microsatellite loci. Sample populations were screened for detectable levels of introgressive hybridization arising from possible admixtures of hatchery coastal rainbow trout with native red band trout.
Book Synopsis Spawning and Overwintering Movements and Habitat Use of Wild Rainbow Trout in the Sanpoil River, Washington by :
Download or read book Spawning and Overwintering Movements and Habitat Use of Wild Rainbow Trout in the Sanpoil River, Washington written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: he overall goal of this research was to characterize movement and habitat usage of the varying life-history strategies of Columbia River redband rainbow trout (Oncorhynchus mykiss gairdneri) present within the Sanpoil River basin on the reservation of the Colville Confederated Tribes throughout spawning and overwintering. Scientists with the Ecology Group of the Battelle-Pacific Northwest Division conducted the work over a 3-year period in cooperation with the Fish and Wildlife Department of the Confederated Tribes of the Colville Reservation (CTCR).
Book Synopsis Habitat Suitability Information by :
Download or read book Habitat Suitability Information written by and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summer Distribution, Abundance, and Movements of Rainbow Trout (Oncorhynchus Mykiss) and Other Fishes in the Lower Yuba River, California by : Jeffrey F. Kozlowski
Download or read book Summer Distribution, Abundance, and Movements of Rainbow Trout (Oncorhynchus Mykiss) and Other Fishes in the Lower Yuba River, California written by Jeffrey F. Kozlowski and published by . This book was released on 2004 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonanadromous Life History Diversity of Rainbow Trout (Oncorhynchus Mykiss) by : Martin C. Arostegui
Download or read book Nonanadromous Life History Diversity of Rainbow Trout (Oncorhynchus Mykiss) written by Martin C. Arostegui and published by . This book was released on 2019 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainbow trout (Oncorhynchus mykiss) is a salmonid species, native to Pacific Ocean drainages in North America and eastern Russia, which exhibits fluvial (stream-resident), adfluvial (lake-migrant), and anadromous (ocean-migrant) ecotypes. The differentiation of fluvial and anadromous individuals in sympatry is well-studied, whereas comparatively little research has focused on the adfluvial form and its distinction from fluvial individuals in sympatry. Thus, the purpose of this dissertation was to investigate the ecological, genetic, and phenotypic diversity of nonanadromous rainbow trout in a natural stream-lake system to better understand the differentiation of fluvial and adfluvial individuals in sympatry, the basis of residency versus migration in this species, and the role of lakes in salmonid diversification. Rainbow trout were sampled in the lake (thus, by definition, adfluvial) and in several tributary streams (where adfluvial and fluvial individuals may co-occur), and were examined for a variety of features to develop a holistic understanding of the behavior, ecology, and evolution of these life history pathways. Stomach contents and stable isotopes revealed disparate trophic ecology among rainbow trout in connected stream and lake habitats, suggesting both an ontogenetic shift in the diet of adfluvial fish as well as divergence in diet between adfluvial and fluvial ecotypes. Rainbow trout in streams fed primarily on aquatic insects, while those in the lake largely consumed snails and amphipods; however, partial trophic convergence among trout in these two habitats occurred when they incorporated the marine nutrient subsidy of spawning sockeye salmon eggs. Stable isotope data suggested that the minimum size of migration from stream to lake habitat by adfluvial fish was ~150 mm fork length, suggesting a juvenile stream-rearing period of a year or more prior to lake entry. Dietary niche comparisons with sympatric Salvelinus species suggested a greater degree of dietary overlap between rainbow trout and Dolly Varden (S. malma) in streams than between rainbow trout and Arctic char (S. alpinus) in the lake, which may increase the relative fitness benefits of migration over residency for rainbow trout. Restriction site-associated DNA sequencing revealed an association between habitat type (stream or lake) and a chromosomal inversion in the rainbow trout genome as well as numerous single nucleotide polymorphisms, supporting the genetic divergence of adfluvial and fluvial ecotypes in sympatry. Rainbow trout in streams were nearly fixed for the rearranged haplotype of the Omy05 inversion, whereas trout in the lake exhibited a markedly higher frequency of the ancestral, anadromy-associated haplotype. The functions of outlier genes with nonsynonymous mutations among stream- and lake-caught trout paralleled those documented in studies of fluvial and anadromous O. mykiss, highlighting the migratory nature of the adfluvial ecotype even though it is nonanadromous. Structure was present at both non-outlier and outlier loci among and within streams supporting populations nearly fixed for the rearranged Omy05 haplotype (i.e., with a genetic predisposition for stream-residency), highlighting the roles of local adaptation and genetic drift via spatial isolation in population divergence. Assessment of lateral coloration patterns and multivariate analyses of body shape of rainbow trout from stream and lake habitats over a range of body sizes revealed ontogenetic and ecotypic variation in coloration and morphology. Color differences among trout of different size classes and habitats indicated ecotype-specific pathways resulting in different terminal coloration patterns; banded parr in streams transitioned to either a silver coloration suited to pelagic waters in the lake (when adfluvial) or bronze coloration suited to confined cover in streams (when fluvial). The morphology of lake-caught rainbow trout was distinct from that of stream-caught trout, and their morphological differentiation exhibited many shared but some unique patterns compared to sympatric Dolly Varden in streams and Arctic char in the lake. Patterns of morphological variation in rainbow trout among and within habitats suggested the presence of partial migration, in which both fluvial and adfluvial individuals are produced from the same population. A review of the spawning behaviors, rearing strategies, and trophic polymorphisms in lakes among 16 species of salmonids from the genera Oncorhynchus, Salmo, and Salvelinus identified a negative association between the extent of reliance on lakes and the degree of anadromy. Oncorhynchus exhibits the least lake reliance, Salmo an intermediate level, and Salvelinus the greatest; opposite of the anadromy spectrum identified in previous studies. Lakes support life history forms, reproductive ecotypes, and trophic morphs unique to lacustrine habitat, and also support anadromous and fluvial salmonids by providing spawning, rearing, overwintering, and/or summer refuge habitat. Adfluvial and anadromous salmonids exhibit similar migration-associated traits and behaviors including the parr-smolt transformation, sex-biased partial migration, and the presence of precocious 'jack' males.
Download or read book Lake Roosevelt Rainbow Trout written by and published by . This book was released on 1999 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Franklin D. Roosevelt was created with the completion of the Grand Coulee Dam in 1942. The lake stretches 151 miles up-stream to the International border between the United States and Canada at the 49th parallel. Increased recreational use, subsistence and sport fishing has resulted in intense interest and possible exploitation of the resources within the lake. Previous studies of the lake and its fishery have been limited. Early studies indicate that natural reproduction within the lake and tributaries are not sufficient to support a rainbow trout (Onchoryhnchus mykiss) fishery (Scholz et. al., 1988). These studies indicate that the rainbow trout population may be limited by lack of suitable habitat for spawning and rearing (Scholz et. al., 1988). The initial phase of this project (Phase I, baseline data collection) was directed at the assessment of limiting factors such as quality and quantity of available spawning gravel, identification of passage barriers, and assessment of other limiting factors. Population estimates were conducted using the Seber/LeCren removal/depletion method. After the initial assessment of stream parameters, several streams were selected for habitat/passage improvement projects (Phase II, implementation). At the completion of project habitat improvements, the final phase (Phase III, monitoring) began. This phase will assess changes and gauge the success achieved through the improvements. The objective of the project is to correct passage barriers and improve habitat conditions of selected tributaries to Lake Roosevelt for adfluvial rainbow trout that utilize tributary streams for spawning and rearing. Streams with restorable habitats were selected for improvements. Completion of improvement efforts should increase the adfluvial rainbow trout contribution to the resident fishery in Lake Roosevelt. Personnel of three co-operating agencies, the Confederated Tribes of the Colville Reservation (CCT), the Spokane Tribe of Indians (STI) and the Washington Department of Fish and Wildlife initiated the project fieldwork in 1990. Phase II included only the Confederated Tribes of the Colville Reservation and the Spokane Tribe of Indians. Phase III is being done by the Confederated Tribes of the Colville Reservation.
Download or read book Ecology Abstracts written by and published by . This book was released on 1993 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Focus written by and published by . This book was released on 1991 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seasonal Habitat Use and Movement by Columbia River Redband Trout in the Twin Lakes, Washington by : Mike J. Biggs
Download or read book Seasonal Habitat Use and Movement by Columbia River Redband Trout in the Twin Lakes, Washington written by Mike J. Biggs and published by . This book was released on 2007 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Suitability and Availability for Rainbow Trout Oncorhynchus Mykiss in the Canyon Reservoir Tailrace and Evaluation of Side Scan Sonar for Habitat Mapping in a Semi-wadable River by : Greg A. Cummings
Download or read book Habitat Suitability and Availability for Rainbow Trout Oncorhynchus Mykiss in the Canyon Reservoir Tailrace and Evaluation of Side Scan Sonar for Habitat Mapping in a Semi-wadable River written by Greg A. Cummings and published by . This book was released on 2015 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainbow Trout Oncorhynchus mykiss are typically stocked in tailraces across the southeastern United States to mitigate fish habitat and assemblage alterations caused by large impoundments. Hypolimnetic discharges from Canyon Reservoir have created conditions suitable for a coldwater tail race fishery and trout have been stocked there since 1966. Changes in habitat availability for adult Rainbow Trout with discharge rate were examined to provide flow and habitat improvement recommendations for the Canyon Reservoir tailrace. Physical habitat modeling incorporated habitat suitability information for trout coupled with hydraulic modeling to assess habitat quality and quantity at various flow rates. Habitat mapping included traditional surveying, remote sensing, bathymetric mapping, and side scan sonar. Side scan sonar was evaluated for efficiency and applicability to river systems similar to the tailrace. Results indicate that summer water temperature is likely the primary limiting factor for adult trout survival and could impose limitations on physical habitat during critical summer months. Modified flow rates and habitat improvement could cause a potential increase in adult trout abundance and assist put-grow-and-take strategies in the upper portion of the tailrace. Side scan sonar provided efficient mapping of non-wadable sections of the study area. Challenges related to water level, access, navigability, positional accuracy, and post-processing were overcome. Trial runs, training, map accuracy assessments, and technological development will improve the effectiveness of this technique.
Book Synopsis Spawning Habitat Characteristics and Natural Recruitment of Rainbow Trout (Oncorhynchus Mykiss) and Brown Trout (Salmo Trutta), Manzanita Lake, Lassen Volcanic National Park, California by : Kerrie A. Pipal
Download or read book Spawning Habitat Characteristics and Natural Recruitment of Rainbow Trout (Oncorhynchus Mykiss) and Brown Trout (Salmo Trutta), Manzanita Lake, Lassen Volcanic National Park, California written by Kerrie A. Pipal and published by . This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Life-history Strategies of Rainbow Trout (Oncorhynchus Mykiss) Across a Volcanic Disturbance Gradient at Mount St. Helens, Washington by : Tara Elizabeth Blackman
Download or read book Life-history Strategies of Rainbow Trout (Oncorhynchus Mykiss) Across a Volcanic Disturbance Gradient at Mount St. Helens, Washington written by Tara Elizabeth Blackman and published by . This book was released on 2014 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, I examine the influence of habitat gradients created by the 1980 eruption of Mount St. Helens, Washington USA on a recently established Rainbow Trout (Oncorhynchus mykiss) population in the Spirit Lake basin. My goal was to evaluate the responses of fish in seven streams across a volcanic disturbance gradient that included three major zones: Pyroclastic Flow (PF), Debris Avalanche (DA), and Blowdown Forest (BD). I compared fish habitat association and demography, sex ratios among age classes, and odds ratios of maturation to determine life-history responses. Age-1 maturing males were the most common life-history observed for non-young-of-year males across all fish-bearing streams. The propensity toward an early-maturing strategy seems to be mediated by two factors: one, stream resources limit residency (no fish older than age-2) and two, a strong relationship between length and maturity. Sex ratios for age-1 fish ranged in proportion from 100% male-biased in one of three fish-bearing PF streams, 65% male-biased (though not statistically different from 1:1) in one of two DA streams, to a roughly 1:1 ratio in all other streams. These results suggest that the disturbance gradient in the Spirit Lake basin may shift the ecological costs and benefits for sex-specific flexibility in life-history strategies across the landscape.
Book Synopsis Focus on Renewable Natural Resources by :
Download or read book Focus on Renewable Natural Resources written by and published by . This book was released on 1985 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seasonal Movements and Habitat Use of Rainbow Trout in the Susitna River Basin, Southcentral Alaska by : Kevin Marshall Fraley
Download or read book Seasonal Movements and Habitat Use of Rainbow Trout in the Susitna River Basin, Southcentral Alaska written by Kevin Marshall Fraley and published by . This book was released on 2015 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potamodromous Rainbow Trout are an important ecological and recreational resource in freshwater systems of Alaska, and increased human development, hydroelectric projects, declining Pacific salmon stocks, and climate change may threaten their populations. We used aerial and on-the-ground telemetry tracking, field-measured and remotely-sensed aquatic habitat characteristics, snorkel surveys, and resource selection and occupancy models to characterize seasonal movements and habitat use of adult Rainbow Trout (>400 mm FL) at multiple spatial and temporal scales across the large (31,221 km2) and complex Susitna River basin of southcentral Alaska during 2003-2004 and 2013-2014. We found that trout overwintered in mainstem habitats near tributary mouths from November to April. After ice-out in May, trout ascended tributaries up to 51 km to spawn, and afterward moved downstream to lower tributary reaches to intercept egg and flesh subsidies provided by spawning salmon in July and August. Trout transitioned back to mainstem overwintering habitats at the onset of autumn when salmon spawning activity waned. Fidelity to tributary of capture varied across seasons, but was high in three out of four drainages. Different habitat characteristics influenced Rainbow Trout habitat use during each season, including stream gradient and sinuosity in the winter, substrate suitability and sinuosity during spawning, mean annual flow during the pre-salmon feeding season, and Chinook salmon spawning potential after the arrival of adult salmon in freshwater. We found that during the ice-free feeding season trout responded to fine-scale (channel unit) characteristics rather than more coarse-scale (stream reach) variables. Weekly movements were significantly longer when spawning salmon were present compared to pre-arrival. We found no difference in movements and habitat use for a subset of fish for which sex was identified using genetic analysis. However, the observed sex ratio was heavily female-biased, which contrasts with what has been observed in other non-anadromous salmonid populations. As most trout undertake extensive movements within and among tributaries and make use of a variety of seasonal habitats to complete their life histories, it will be critical to take a broad and multiscale approach to their management in light of anticipated future land use and climate change.
Book Synopsis Summer Habitat Ecology of Rainbow Trout in the Middle Fork of the Gulkana River, Alaska by : Steve Robert Brink
Download or read book Summer Habitat Ecology of Rainbow Trout in the Middle Fork of the Gulkana River, Alaska written by Steve Robert Brink and published by . This book was released on 1995 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
