Download or read book Urbanization Effects on Overwintering Brook and Brown Trout written by and published by . This book was released on 2013 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined impacts of urbanization and winter conditions on stream ecosystems and their fish communities is an important area of study that has previously been unaddressed. Urbanized streams commonly exhibit low fish richness and are susceptible to species and diversity loss. Additionally, winter is a period of increased mortality for stream fishes due to physiological and environmental changes. To increase winter survival, fish need sufficient energy reserves, access to good winter habitat, and a decreased likelihood for high risk activities. This study assessed the interactive effects of urbanization and wintertime on brook and brown trout condition and movement. Over the course of two winters, two urban and two rural streams in the Upper Peninsula of Michigan were compared for fish condition and movement using electrofishing and telemetry. Significantly higher mean fish condition was seen in the urban streams for both brook and brown trout, in several size classes, during both winters. Higher mean fish condition was also seen during winter 2 for both brook and brown trout, in most size classes. Mean percentage of recaptured fish that showed movement was not significantly different between the urban and rural streams or between winters. This study suggests stream temperature, water velocity, and fragmentation may explain higher fish condition in urban streams.
Download or read book Effects of Urbanization and Pollution on the Home Range and Movements of Brown Trout Salmo Trutta in Valley Creek Valley Forge Pennsylvania written by Jason Henry Knouft and published by . This book was released on 1996 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Urbanization on Brown Trout Salmo Trutta Other Fishes and Macroinvertebrates in Valley Creek Valley Forge Pennsylvania written by Stanley and James R. Spotila Kemp and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report RM written by and published by . This book was released on 1989 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmonid habitat Relationships in the Western United States written by Michael D. Marcus and published by . This book was released on 1990 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing Effects of an Overwinter Dewatering on the Egg to fry Survival of Brown Trout in a Montana Stream written by Christa Lyn Torrens and published by . This book was released on 2010 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural instream flow regimes are necessary for the ecological health of streams, including the maintenance of healthy fish populations. Economic interests such as agriculture, mining, and other industries remove water from streams, which can negatively affect fish populations. Wintertime diversions of water affect autumn-spawning salmonids such as brown trout and bull trout; they occur at the critical egg-to-fry development phase, possibly reducing oxygen flow to the eggs and increasing the rate of sub-gravel freezing. This study was designed to examine the effects of a wintertime industrial water diversion on redd building and egg-to-fry survival of wild brown trout in Warm Springs Creek, Montana. To measure egg-to-fry survival, I counted fertilized brown trout eggs into mesh-lined baskets and placed these baskets into 6 artificial redds in Warm Springs Creek. While the eggs were developing in the gravel, I measured parameters that are critical to egg development and survival and that could be affected by dewatering. In April, after the hatch, I removed the baskets and tallied the number of live fry, dead fry, live eggs and dead eggs. Survival rate was compared across years and the measured parameters were statistically analyzed to determine whether any of them had a significant impact on survival. There was no autumn or winter dewatering during the course of this study, so I cannot comment on the effects of a dewatering. Some interesting baseline patterns did emerge. The survival rate for the first two years was similar, 41% and 35%. Survival was significantly lower the third year, measuring only 8%. This may be due to a longer, colder winter the third year. The colder it was within the study redds, the more fish died. Also, the lower the water level, the colder it was within the redds. These patterns indicate that a drawdown or dewatering could increase egg mortality.
Download or read book The Effects of Overwinter Flowson the Spring Condition of Rainbow and Brown Trout Size Classes in the Green River Downstream of Flaming Gorge Dam Utah written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flaming Gorge Dam, a hydroelectric facility operated by the Bureau of Reclamation (Reclamation), is located on the Green River in Daggett County, northeastern Utah. Until recently, and since the early 1990s, single daily peak releases or steady flows have been the operational pattern of the dam during the winter period. However, releases from Flaming Gorge Reservoir followed a double-peak pattern (two daily flow peaks) during the winters of 2006-2007 and 2008-2009. Because there is little recent long-term history of double-peaking at Flaming Gorge Dam, the potential effects of double-peaking operations on trout body condition in the dam's tailwater are not known. A study plan was developed that identified research activities to evaluate potential effects from winter double-peaking operations (Hayse et al. 2009). Along with other tasks, the study plan identified the need to conduct a statistical analysis of historical trout condition and macroinvertebrate abundance to evaluate the potential effects of hydropower operations. The results from analyses based on the combined size classes of trout (85-630 mm) were presented in Magnusson et al. (2008). The results of this earlier analysis suggested possible relationships between trout condition and flow, but concern that some of the relationships resulted from size-based effects (e.g., apparent changes in condition may have been related to concomitant changes in size distribution, because small trout may have responded differently to flow than large trout) prompted additional analysis of within-size class relationships. This report presents the results of analyses of three different size classes of trout (small: 200-299 mm, medium: 300-399 mm, and large: ≥400 mm body length). We analyzed historical data to (1) describe temporal patterns and relationships among flows, benthic macroinvertebrate abundance, and condition of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) in the tailwaters of Flaming Gorge Dam, and to (2) evaluate the relative importance of the effects of flow (i.e., flow volumes and flow variability), trout abundance (catch per unit effort [CPUE]), and benthic macroinvertebrate abundance on trout condition for different size classes of trout.
Download or read book Effects of Artificial Habitat Structures on Stream Morphology and Brook and Brown Trout in the North Branch of the Au Sable River Michigan written by Elizabeth Francina Gulotty and published by . This book was released on 2019 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efforts to improve habitat for fish, particularly salmonids, have a long history and intervention is extensive and ongoing. Resource managers and practitioners spend considerable time and money implementing stream habitat projects. Installation of artificial habitat structures is a consistently popular approach. In this thesis I describe effects of artificial structures on stream morphology and fish density and highlight management implications. In the first chapter, I address the effects of habitat structures on stream morphology in a low-power system. Formal evaluations of the effects of habitat structures on stream morphology in low-power systems like the North Branch of the Au Sable River have been very limited relative to the popularity of these projects. I demonstrate that while artificial structures produce some desired habitat characteristics, their effects tend to be localized and may be outweighed by deposition. In the second chapter, I evaluate the relationship between the density of Brown Trout (Salmo trutta) and Brook Trout (Salvelinus fontinalis) relative to the density of artificial structures. While there are significant relationships for both species, responses are highly variable, and differ by species and size in relation to structure type. I also show the influence of stream context on relationships between fish and artificial structures.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2011-09 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Authorization for Incidental Take and Implementation of a Multiple Species Aquatic Habitat Conservation Plan and Candidate Conservation Agreement with Assurances written by and published by . This book was released on 2006 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environment Abstracts Annual 1991 written by Bowker Editorial Staff and published by R. R. Bowker. This book was released on 1992-03 with total page 1792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global Climate Change Impacts in the United States written by U.S. Global Change Research Program and published by Cambridge University Press. This book was released on 2009-08-24 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
Download or read book Riparian Areas written by National Research Council and published by National Academies Press. This book was released on 2002-10-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
Download or read book Production of Juvenile Atlantic Salmon Salmo Salar in Natural Waters written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date information, knowledge and research in progress in scientific fields related to natural production of juvenile Atlantic salmon and some other ecologically similar fluvial salmonids is contained in the 25 papers and 12 abstracts contained in this publication, which were prepared for an international symposium held in St. John's, Newfoundland. Studies relate to stream ecology, invertebrates and predators, habitat improvement, competitive effects, behaviour and dispersal, habitat and production of juvenile salmon, population dynamics and relationships of juvenile salmon estimates to smolt yields. A list of participants at the conference is also provided.
Download or read book Freshwater Biodiversity written by David Dudgeon and published by Cambridge University Press. This book was released on 2020-05-21 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Download or read book Charrs written by E.K. Balon and published by Springer. This book was released on 1980-04-30 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1974 with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
