Download or read book Long term Population Dynamics of an Unexploited Lacustrine Brook Trout Salvelinus Fontinalis Population written by Erin Nicole Danielle Pallette Brown and published by . This book was released on 2016 with total page 220 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 A Comparison of the Population Dynamics and Diet of Eastern Brook Trout Salvelinus Fontinalis and the Macroinvertebrate Communities Sampled from Three Noncontiguous Stream Sections in Craft Run Pennsylvania written by Mark Steven Woythal and published by . This book was released on 1995 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Variation in Brook Trout Salvelinus Fontinalis Population Dynamics and Juvenile Recruitment Potential in an Appalachian Watershed written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management Implications for A Lacustrine Brook Trout Population written by Timothy Nathanial Taylor and published by . This book was released on 2019 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Areas in the Columbia River Basin have been impacted by hydroelectric dam developments, requiring some anadromous and resident fish losses to be mitigated with resident fisheries enhancement. Brook Trout are one resident fish species being selectively managed by the Confederated Tribes of the Colville Reservation to mitigate for these losses and contribute to desirable subsistence and recreational fisheries. The Owhi Lake Brook Trout fishery is particularly important as a tribal member only fishing lake, and fisheries managers are interested in investigating population dynamics to inform present management decisions. My dissertation investigates possible alternatives to ageing Brook Trout, supply-demand comparisons to inform potential food limitations, and models population viability in response to variable stocking programs. Scale and fin rays were found not to match otolith age, though age estimation was influenced by reader's experience. Fin rays matched otolith age more than scales, but variability in age estimates was still greater than 5% CV. Prior experience ageing specific structures was the main factor influencing age estimates, given more agreement was found between readers with similar experience. Supply-demand comparisons identified 2017 as a period where Brook Trout demand exceeded littoral prey production. During this period, Brook Trout switched from preying primarily on littoral prey to pelagic zooplankton, ultimately increasing proportion of maximum consumption rates and lowering growth potential. Taken together, it is likely that the system's capacity was exceeded in 2017. Matrix models suggest that the population's growth rate was highest when Owhi Lake was not stocked. All models predict similar population sizes after 20 years, and each model's population growth rate were not significantly different. Results suggest that Owhi Lake Brook Trout can likely be self-sustaining.
Download or read book Demographic and Habitat Requirements for Conservation of Bull Trout written by Bruce E. Rieman and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Role of Compensatory Mechanisms in the Population Dynamics of Lake Trout Salvelinus Namaycush in the U S Waters of Lake Superior written by Cecilia Paola Ferrero and published by . This book was released on 1995 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing Populations of Eastern Brook Trout Salvelinus Fontinalis Above and Below Waterfalls in Mountain Streams of Virginia written by and published by . This book was released on 2019 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenically driven factors, such as increasing temperature and sediment in valley streams, acidification of mountain streams, and the introduction of non-native trout, are restricting habitat suitable for healthy populations of eastern brook trout (Salvelinus fontinalis) throughout their native Appalachian range. Brook trout are important as predators of insects in mountain streams and as a favorite of anglers. It is crucial that remaining populations in sustainable habitats be identified and preserved. Waterfalls are geologic knickpoints preventing base-level lowering that create unique, stable landscapes above them, which may alleviate the temperature-productivity/acidity "habitat squeeze" for populations of brook trout and could serve as potentially ideal targets for conservation efforts despite being isolated. This study investigates brook trout occurrence above waterfalls in Virginia and compares brook trout populations found above waterfalls to those below them. One-hundred meter reaches above and below seven waterfalls in Virginia's George Washington and Jefferson National Forest were sampled for brook trout via 3-pass, block-netted, backpack electrofishing depletions. All brook trout were counted, weighed, and measured for fork length. The response variables are differences in 1) percent dominance, 2) population size, 3) biomass, and 4) length-weight index (Fulton's Condition Factor) between brook trout above and below waterfalls. Brook trout dominance (100 vs. 36.9%) is greater above than below waterfalls, but not significantly (p = 0.1003). We found abundance (26 vs.12 individuals per 100m) and overall biomass (885.3 vs 284.6 grams per 100m) of brook trout populations above waterfalls to be significantly greater than their below waterfall counterparts (p = 0.078 for both). We also found brook trout above waterfalls to have a higher condition factor (1.086g/cm3 vs 1.0636g/cm3) than those below waterfalls (p = 0.031). Lastly, we found populations above waterfalls where their occurrence was previously unknown. Despite being isolated, brook trout populations above waterfalls were just as if not more robust than those below and may be excellent targets for conservation.
Download or read book A Model to Link Habitat Supply to Population Dynamics for Lake Trout Salvelinus Namaycush Populations in Western Lake Superior written by John Netto (Ph. D.) and published by . This book was released on 2006 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Long term Field Test of Habitat Change Predicted by PHABSIM in Relation to Brook Trout Population Dynamics During Controlled Flow Reduction Experiments written by Andrew J. Nuhfer and published by . This book was released on 2004 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of a Brook Trout Salvelinus Fontinalis Population in a Northern West Virginia Stream written by Bruce Leonard Redd and published by . This book was released on 1963 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment and Predictive Model for Brook Trout Salvelinus Fontinalis Population Status in the Eastern United States written by and published by . This book was released on 2006 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Population Dynamics of Brook Trout in the Two Sub alpine Lakes in Southeastern Wyoming written by William G. Hepworth and published by . This book was released on 1959 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statewide Analysis of Brook Trout Salvelinus Fontinalis Population Status and Reach scale Conservation Priorities in West Virginia Watersheds written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Population Dynamics of Lake Trout Salvelinus Namaycush in Lake Manitou in Relation to the Planting and Spawn taking Operation written by B. A. Henderson and published by Ontario, Ministry of Natural Resources, Fisheries Branch. This book was released on 1982 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exploring the Role of Temperature and Possible Alternative Stable States in Brook Trout Salvelinus Fontinalis Population Structure written by Brooke Lynn Hawkins and published by . This book was released on 2019 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most organisms undergo ontogenetic changes, leading to complex life histories. An organism’s prey and habitat preferences change as they age, as may their responses to the same environmental stressors. Therefore, a changing environment may confer a competitive advantage to a particular life stage, leading to population structures dominated by one stage or another. I used survey data of brook trout (Salvelinus fontinalis) in lakes across the Sierra Nevada to investigate if there was evidence for (1) alternative stable states between populations dominated by small or large fish, and (2) trends in population structure across elevation to suggest that temperature plays a key role in determining size structure. I characterized the average fish size, number of size classes, and the evenness of the size class distribution for 42 populations. I found these features by fitting a Bayesian normal mixture model using Markov Chain Monte Carlo simulations. I tested for alternative stable states by looking for bimodality in each feature, and I analyzed each feature’s relationship with elevation using Spearman’s rank correlation. I found that that populations are most often dominated by small individuals, rarely by large individuals, and most often contain either one or two distinct size classes. If large individual body sizes occur as an alternative population state, my results show that such populations occurred rarely, or were not well sampled by these surveys. High elevation was associated with reduced average size and greater numbers of size classes, suggesting that temperature does affect size distributions.
Download or read book Conservation Genetics of Remnant Anadromous Brook Trout Salvelinus Fontinalis Populations at the Southern Limit of Their Distribution written by Brendan J. Annett and published by . This book was released on 2005 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
