Download or read book Characterizing the Flow Regime in Brook Trout Salvelinus Fontinalis Incubation Habitats and the Implications for Management in a Hydro regulated River written by Stephen Slongo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydropower accounts for more than one third of Ontario Power Generation's electrical production. Hydroelectric development often occurs on rivers that also support recreational fisheries. The construction and operation of dams, diversions and generating facilities unavoidably influence the ecological function of rivers. The Aguasabon River is a northern Canadian Shield river with major developments for water diversion, storage, and power generation. This river offers opportunity to examine the importance of vertical flows through the substrate at a Brook Trout (Salvelinus fontinalis) spawning area. The vertical and horizontal hydraulic gradients and subsequent water temperature changes are the subject of this study. Piezometers were used to monitor the river and subsurface water levels near Brook Trout redds during the spawning and incubation period under normal and increasing discharge conditions. The Brook Trout spawning area in the Aguasabon River experienced upwelling conditions for the entire monitoring period (Oct 28th, 2016 - Jan 13th, 2017) before water release at the Long Lake Control Dam (LLCD). Hyporheic temperatures declined gradually, remaining >3.7 °C. The river temperature in the winter before water release was 1.5 °C. Rapid increase in water level after discharge from above the LLCD resulted in the reversal of flow in the hyporheic zone. Negatives values of vertical and horizontal gradients occurred for up to 30 h between surface water and hyporheic water up to 1.8 m below the river substrate. The water temperature in all piezometers decreased in unison with water release. Shallow inshore piezometers showed the greatest change, ˃53 h at 1 °C, compared to both shallow and deep offshore piezometers, which never fell

Download or read book Brook Trout Salvelinus Fontinalis Spawning Habitat in a Boreal Stream written by Jan Franssen and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The reproductive success of brook trout (Salvelinus fontinalis) populations, like those of other salmonid species, is dependent on the availability and quality of spawning/incubation habitats. For brook trout in particular substrate composition and groundwater-hyporheic flow characteristics are key abiotic factors influencing both the suitability of lotic spawning habitats and the survival of embryos nested within these habitats. Egg-to-emergence survival has been shown to be negatively related to substrate fine sediment concentrations and positively related to interstitial flow velocity. Both substrate composition (through filtering effects) and interstitial flow are also thought to influence the susceptibility of egg pockets to fine sediment infiltration. The objectives of this doctoral study are to clarify the roles of groundwater and hyporheic flow in brook trout redd site selection; as well as the effect of substrate composition and interstitial flow on...

Download or read book Habitat Suitability Index Model for Brook Trout in Streams of the Southern Blue Ridge Province written by Christopher J. Schmitt and published by . This book was released on 1993 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Robert F. Raleigh and published by . This book was released on 1986 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Suitability Index Models written by Robert F. Raleigh and published by . This book was released on 1982 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Hydrological Patterns on Brook Trout Salvelinus Fontinalis and Rainbow Trout Oncorhynchus Mykiss Population Dynamics in the Great Smoky Mountains National Park written by and published by . This book was released on 2008 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrologic processes impact the functioning of aquatic ecosystems and influence fish population dynamics. The flow regime of a stream affects the structure, composition, and productivity of fish communities by regulating abiotic habitat conditions and biotic community processes. In the Great Smoky Mountains National Park (GRSM), native brook trout (Salvelinus fontinalis) populations have declined in some watersheds over the past decade, believed to be primarily due to episodic acidification. The potential affects long-term hydrologic patterns, temporal hydrologic trends, and hydrologic extremes have on brook and rainbow trout (Oncorhynchus mykiss) populations were explored in this study. The current GRSM fish sampling program began nearly two decades ago; a total of 69 streams, including 369 sites, are routinely sampled by GRSM fisheries biologists with standard methods. Detailed data is collected on the trout populations. The Nature Conservancy's Indicators of Hydrologic Alteration (IHA) was used to quantify the flow regime of each stream into 67 ecological relevant parameters. Because the trout sites were located in remote ungaged streams, the Hydrologic Simulation Program FORTRAN (HSPF) was used to simulate flows at each trout site for a study period lasting 18 years (1990-2007). Using local climate data the model was calibrated by adjusting parameters including storage, infiltration, runoff, and ground water for three elevation classes (low

Download or read book The Effect of Systematic Temperature Variation on the Incubation and Development of Brook Trout Salvelinus Fontinalis Mitchill Eggs written by Pamela Sue Marten and published by . This book was released on 1990 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Habitat Suitability for Brook Trout Salvelinus Fontinalis in Two Southern Ontario Streams Using a Standard Assessment Protocol written by L. Melissa H. Larion and published by . This book was released on 2006 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery from and Effects of a Catastrophic Flood and Debris Flow on the Brook Trout Salvelinus Fontinalis Population and Instream Habitat of the Staunton River Shenandoah National Park Virginia written by and published by . This book was released on 2000 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Suitability Index Models written by Robert F. Raleigh and published by . This book was released on 1982 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Brown Trout written by Javier Lobón-Cerviá and published by John Wiley & Sons. This book was released on 2017-12-18 with total page 821 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brown Trout: Biology, Ecology and Management A comprehensive guide to the most current research, history, genetics and ecology of the brown trout including challenging environmental problems The brown trout is an iconic species across its natural European distribution and has been introduced throughout the World. Brown Trout offers a comprehensive review of the scientific information and current research on this major fish species. While the brown trout is the most sought species by anglers, its introduction to various waters around the world is causing serious environmental problems. At the same time, introduction of exogenous brown trout lineages threats conservation of native gene pools of populations in many regions. The authors summarize the important aspects of the brown trout’s life history and ecology and focus on the impact caused by the species. The text explores potential management strategies in order to maintain numerous damaged populations within its natural distributional range and to ameliorate its impacts in exotic environments. The authors include information on a wide-range of topics such as recent updates in population genetics, evolutionary history, reproductive traits and early ontogeny, life history plasticity in anadromous brown trout and life history of the adfluvial brown trout and much more. This vital resource: Contains the latest research on the biology and ecology of brown trout Includes information on phylogeography, genetics, population dynamics and stock management Spotlights the brown trout’s introduction to regions around the world and the serious environmental impacts Offers a comprehensive review of conservation and management techniques Written for salmonid scientists and researchers, fishery and environmental managers, and students of population genetics, ecology and population dynamics, Brown Trout explores the most recent findings on the history, ecology and sustainability of this much-researched species.

Download or read book The Effect of Water Quality on the Survival and Fitness of Brook Trout Salvelinus Fontinalis Eggs Alevins and Fry in Aquaculture and Deep Springs Along the South River in Waynesboro VA written by and published by . This book was released on 2016 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brook trout populations have been extirpated in many Virginia streams due to poor water quality thus establishing populations of brook trout for recreational fishing is an important priority of fisheries management. The ability of a stream to protect developing brook trout (Salvelinus fontinalis) eggs and larval fish from adverse effects from acidification and metal toxicity as well as provide needed minerals such as magnesium (Mg2) and calcium (Ca2+) for early-stage development is controlled primarily by geology, which influences water hardness and acid-neutralizing capacity (ANC). The focus of this research was on the effects of Ca2+ and Mg2+ water hardness and ANC on the early stages of developing brook trout as well as parameters such as dissolved nitrogen gas (N2), sulfate concentration (SO42−), and ultra-violet light (UV). In order to more effectively accomplish the objectives, the research was performed in a two-phased study; one phase in the lab and the second phase in-situ. A 107-day laboratory experiment was performed where brook trout eggs and larval brook trout were reared in various levels of Ca2+ and Mg2+ water hardness, ANC and SO42− to determine any differences in survival, growth rate, and yolk-sac to whole-body area ratio. A 31-day in-situ study was performed where brook trout eggs were hatched in South River springs, Montebello Fish Culture Station (MFCS) spring and South River main-stem water to determine how survival is impacted by water quality. Results indicated that when water is high in both Ca2+ and ANC, there was a high survival and growth rate. It was also found that brook trout with a 'home field' advantage, where brook trout hatched in water where the brood stock were reared and spawned for many generations, had high growth rates and the highest survival. This result implies that genetic adaptation to water quality can facilitate improved early-stage survival and growth. Low levels of Ca2+correlate with lower yolk-sac to whole-body ratio, which suggests the importance of available Ca2+ during early development. There were conflicting results regarding SO42− as it was detrimental in the 107-day lab study and beneficial in the 31-day in-situ study. There was increased fitness (higher survival and higher individual growth rate) when SO42− was coupled with Mg2+ as opposed to Ca2+yet the yolk-sac was more depleted when SO42− was coupled with Mg2+ possibly due to the primary uptake method being via diet and not from the environment as it is for Ca2+. For the 31-day in-situ study, a linear regression showed a negative relationship between N2 and percent survival (R2=0.58, p2, UV, ANC, and SO42− (adjusted R2=0.672, p2 but is lacking intermediate values. Due to this gap in data a quadratic regression of only MFCS data was performed which shows that as N2 increases above 100%, survival increases and then begins to decrease rapidly above 103.5% (adjusted R2=0.43, p2 does not have as much of an effect until it reaches higher saturation levels. Springs along the South River have ideal temperature, moderate concentrations of Ca2+ and ANC and do not have excess fine sedimentation however; N2 has a considerable impact on brook trout survival during the early stages of development. This research helps identify some concerns regarding spawning habitat for the establishment of a brook trout population in the South River and it demonstrates the importance of aquaculture in fisheries management as well as furthering the understanding of early-stage development.

Download or read book Effects of Annual Thermal Regime on Growth Trajectories of Native Age 0 Brook Trout Salvelinus Fontinalis written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The rapidly increasing temperatures of aquatic systems associated with climate change represent a novel threat to populations of brook trout (Salvelinus fontinalis), and much uncertainty remains about the potential of these populations to acclimate, adapt, or compensate for such changes. Brook trout are considered stenothermal, with a thermal preference of 14°C to 18°C, and a critical thermal maximum of 25°C. With such narrow thermal optima, brook trout are restricted to watersheds with adequate thermal refugia to withstand warm summer temperatures. For cold-adapted species such as brook trout (Salvelinus fontinalis), the long-term success of the species will depend on its ability to cope with, and adapt to, rapidly changing thermal conditions. The current study evaluated growth patterns of young-of-the-year brook trout in two tributaries with dramatically different annual thermal regimes. Using a common garden design, we then evaluated the effect of variable incubation temperatures on egg size, developmental phenology, yolk sac allocation, hatch timing, and size at hatch under laboratory conditions. The results of the current study provide evidence for plasticity in the developmental response of brook trout to withstand moderate effects of climate change. The results of the field studies demonstrated wide variability between populations, individuals, and cohorts. Laboratory studies suggested that population differences were largely mitigated by the effect of the environment, and that incubation conditions appeared to have a strong moderating effect on population differences in early development."--Abstract.

Download or read book Modelling the Effect of Climatic Warming on Stream Habitat of Brook Trout Salvelinus Fontinalis written by John Donald Meisner and published by . This book was released on 1989 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Selection in Brook Trout Salvelinus Fontinalis written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Impact of Climate Change on Brook Trout Salvelinus Fontinalis Thermal Habitat in Their Native Range in the United States written by Kelsey Maggan Schlee and published by . This book was released on 2014 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sensitivity and Exposure of Brook Trout Salvelinus Fontinalis Habitat to Climate Change written by and published by . This book was released on 2010 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Predicting coldwater fisheries distributions under various climate scenarios is of interest to many fisheries managers and researchers. Larger scale models have been useful in highlighting the potential large scale threat. However, the error associated with these models makes predictions of the persistence of individual cold water fisheries problematic. Most of this error is associated with predicted air and water temperatures which typically are simple elevation and location (latitude/longitude) models with simple caveats such as 1°C increase in air temperature equals 0.8°C increase in water temperatures. I directly measured paired air and water temperatures in watersheds containing reproducing populations of brook trout in Virginia during the critical summer period (July 1 to September 30) in both 2009 and 2010. I developed a classification system using sensitivity (change in the daily maximum water temperature from a 1°C increase in the daily maximum air temperature) and exposure metrics (frequency; duration; and magnitude of daily maximum water temperatures> 21°C) that classified brook trout populations into four categories: High Sensitivity-High Exposure; High Sensitivity-Low Exposure; Low Sensitivity-High Exposure and Low Sensitivity- Low Exposure. I found that my paired air and water temperature relationships were highly variable among sites and were a useful metric for classifying the sensitivity and exposure of individual brook trout populations to various climate change scenarios. I identified many (25%) Low Sensitivity- Low Exposure brook trout populations that appear to be resilient to climate change. The median sensitivity (0.39°C) in this study was much lower than the assumed rate (0.80°C) used in many regional models that predicted a complete extirpation of brook trout in Virginia. Several GIS generated metrics (sample area; % riparian canopy; solar insolation ; % groundwater; elevation; % watershed in forest cover) were useful for predicting (accuracy approximately 75%) sensitivity and exposure values. Directly measuring paired air and water temperature relationships can reduce the error of large scale models. I recommend that managers making investment decisions in protecting and restoring brook trout use my direct measurement approach when they cannot afford to make a Type I or Type II error.