Download or read book River Plume Effects on Yellow Perch Growth Survival and Recruitment in Lake Erie written by Julie Marie Reichert and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River Plume Effects on Larval Yellow Perch Perca Flavescens Survival and Predation in the Western Basin of Lake Erie written by Lucia Beatriz Carreon Martinez and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Effects of Turbidity on Age 0 Yellow Perch Perca Flavescens in the Western Basin of Lake Erie written by Nathan F. Manning and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the effects of turbidity on visually foraging fish species can be difficult due to the dynamic nature of sediment plumes and algal blooms in productive aquatic systems. In this dissertation, I examined the effects of turbidity type, timing and intensity on age-0 yellow perch (Perca flavescens). To accomplish this, I used ArcGIS and generalized additive models (GAMs), individual based models (IBMs) and the Soil and Water Assessment Tool (SWAT). The initial study utilized ArcGIS and GAMs to determine the relationship between turbidity and size and abundance in August of age-0 yellow perch. The GAMs presented in this dissertation show that water clarity (in this case used as a surrogate for turbidity) is an important environmental factor in determining the length and abundances of age-0 yellow perch in western Lake Erie. The results suggest that the influence of water clarity produces a distinct separation of areas of higher growth potential and areas of higher abundances in the western basin. While this division may be attributable to a number of mechanisms, including size dependent predation risk, foraging ability, and density dependent growth, the effects of water clarity, and in particular the negative effects of algal blooms, on foraging ability are of particular interest in Lake Erie. For the second step in this research I used laboratory derived feeding rates in a range of turbidity types and intensities to inform IBMs that varied the timing, type and intensity of turbidity to determine the effects of changes to a systems turbidity regime on growth and starvation mortality. The results of the model suggest that the timing and persistence of sediment plumes and algal blooms can drastically alter the growth potential and starvation mortality of a yellow perch cohort. The timing of sediment plumes in particular can have significant consequences to the growth, and ultimate success of a yellow perch population. High sediment turbidity early in the season, prior to the ontogenetic shift, can be potentially beneficial to fish growth. However, if high sediment turbidity conditions persist, they can slow growth and increase the starvation mortality of juvenile fish. In contrast, algal blooms, no matter when during the season they occur. In the final study, I used SWAT and IBM models to link watershed level changes in land use and climate to potential changes in age-0 yellow perch growth in the Maumee Bay, Lake Erie. Changes in land-use, either through increased urbanization, or changing agricultural practices, primarily affect fish growth through the alteration in the timing and intensity of sediment plumes. However, it may be that, at least in the Maumee River watershed, the negative effects have reach a plateau of sorts, with significant reductions in fish growth requiring changes to the watershed that are unlikely in the near future due to economic and infrastructure restrictions. Climate change, on the other hand, could potentially compound the effects of current land use practices through the promotion of algal blooms due to increased water temperatures, thus further reducing fish growth. The results of these three studies show that the effects of turbidty on age-0 yellow perch are dynamic, and can vary significantly depending on a number of different factors. The results of this research help to illuminate these complex interactions, and provide a warning about potential consequences due to anthropogenic alterations of an aquatic system's turbidity regime.
Download or read book Climate Change Effects on Lake Erie Yellow Perch Reproduction and Recruitment written by Troy Mason Farmer and published by . This book was released on 2013 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Climate warming is expected to positively affect cool-water, temperate fish populations by lengthening the growing season and expanding thermal habitats suitable for positive growth. Yet, little is known about how a corresponding shortened winter might affect temperate fish populations, especially for species that require a prolonged period of cold temperature during the winter prior to spawning for proper ovary development. Additionally, events such as hypolimnetic hypoxia (O2
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2014 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Responses of an Exploited Fish Population to Environmental Change written by David Arthur Dippold and published by . This book was released on 2020 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamics of fish populations are determined by demographic processes such as growth, survival, mortality, and movement that are influenced directly and indirectly by a suite of biotic and abiotic factors. Human-induced environmental change (e.g., climate change, nutrient pollution) is altering these processes, influencing the ability of ecosystems to support their resident populations, as well as the valuable ecosystem services they provide. The impacts of human-induced environmental change are often negative, can occur at a variety of spatial and temporal scales, and can vary with ontogeny. Therefore, understanding the historical and anticipated effects of environmental change on the dynamics of fish populations is critical to maintaining them, including the valued services and fisheries that they support. My research has sought to better understand the factors that influence population-level responses of exploited fish populations to changing environmental conditions, and to anticipate what these responses may look like amidst future change. To help achieve this research goal, my collaborators and I developed and applied numerous quantitative approaches to economically and ecologically important Lake Erie fish populations. Specifically, we forecasted the recruitment dynamics of several fish populations (walleye Sander vitreus, yellow perch Perca flavescens, and white perch Morone americana) under future climate change scenarios (Chapter 2), investigated historical changes in walleye recruitment dynamics in response to environmental factors (Chapter 3), anticipated how environmental change might alter early-life growth and survival of walleye via changes in larval stage duration (Chapter 4), and identified the role of demographic and environmental factors on the spatial patterning of walleye recreational harvest rates in Lake Erie (Chapter 5). These studies demonstrate that the dynamics of Lake Erie’s fish populations have changed in the past, and that environmental change is likely to continue to alter the dynamics of Lake Erie’s fish populations in the future. In Chapter 2, our modeling showed that walleye and yellow perch recruitment were forecasted to decline under future climate change, owing to shorter and warmer winters. For yellow perch, these declines were projected to be exacerbated by the implementation of agricultural conservation practices that reduce nutrient inputs into the west basin of Lake Erie. By contrast, recruitment of invasive white perch was projected to remain stable or increase relative to the past. In Chapter 3, my colleagues and I developed a modeling framework to build more informative environment-recruitment models. By applying this framework to the Lake Erie walleye population, we determined that the timing and importance of environmental factors previously associated with walleye recruitment (e.g., winter severity, spring warming rate, river discharge) have likely changed in the recent past. In Chapter 4, we linked output from a physical model to a bioenergetics model to show that walleye larval stage duration has likely changed in the recent past, with significant differences in direction and magnitude among Lake Erie’s three basins. Using historical environmental variability, we anticipated how future climate change might affect early-life growth and survival. Finally, in Chapter 5, my colleagues and I demonstrated that the relationships between temperature and walleye population size and recreational harvest rates vary spatially, and we anticipated how future ecosystem change could necessitate changes to the management of walleye in Lake Erie, owing to this spatial dependency. Collectively, the results of my research have helped to understand how Lake Erie’s fish populations respond to environmental change, to the benefit of fisheries management.
Download or read book EcoLE FisH YP written by Jonathan Douglas Horn and published by . This book was released on 2010 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultimately, multiple mortality/survival influences work in concert to produce strong and poor year classes of yellow perch. Thus, a combination of environmental conditions that are conducive to survival at multiple life stages may provide the best opportunity for strong year classes of Lake Erie yellow perch.
Download or read book Issues in Global Environment Biodiversity Resources and Conservation 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 1175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Global Environment—Biodiversity, Resources, and Conservation. The editors have built Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Global Environment—Biodiversity, Resources, and Conservation in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book The Effects of Life History Parameters on the Reproductive Potential of Yellow Perch Perca Flavescens Populations written by Tanya Vinodrai Trivedi and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yellow perch populations in Lake Erie exhibit large yearly fluctuations in year class strength (YCS), with most years showing relatively poor recruitment. For percids, no statistically significant relationship between stock and recruitment has been found. Most research has focussed on various environmental factors to explain the variability in YCS. Of the studies reviewed in the first chapter, variations in YCS could not be explained by variation in any single environmental factor. The second chapter revisited the theoretical equation that spawning stock size is related to recruitment. Yearly variation in the number of mature females in the spawning stock may explain the variability in the YCS of perch. We found that the proportion of fish at age varied annually from 1978-1990, suggesting that intermittent reproduction exists for Lake Erie yellow perch. The third chapter evaluated through a model whether variation in the proportion mature as well as interannual variations in age distributions, size and the associated size-related fecundity could explain the variability in YCS of the yellow perch populations. Variation in the proportion mature could explain a large proportion of the observed YCS, however we could not accurately predict recruitment from the variations in the life history parameters included in the model.
Download or read book Analysis of Yellow Perch Growth in Lake Erie written by Robert Scott Hayward and published by . This book was released on 1988 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatially explicit Habitat Characterization Suitability Analysis Verification and Modelling of the Yellow Perch Perca Flavescens Mitchell 1814 Population in Long Point Bay Lake Erie microform written by Susan Elisabeth Doka and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Different approaches were used to characterize, assess, test and model the fish-habitat interactions of yellow perch in Long Point Bay. Chapter 1 describes the methodologies for explicitly characterizing spatial and temporal habitat through mapping and modelling. Chapter 2 connects habitat and ontogenetic niche shifts in perch life history, with the aim of determining suitable habitat availability for the Long Point Bay perch population. Habitat suitability indices and models were used to map and identify the areas of suitable habitat, including thermal habitat. Chapter 3 compares a known distribution of yellow perch larvae with HSI predictions of habitat suitability as a validation exercise. Abundance and size distributions from the survey were compared to thermal and HSI predictions of suitable habitat to test for correspondence. The relationship between food availability and habitat characteristics, especially vegetation, were also tested. A model was developed in Chapter 4 that concentrated on the first year of life and the effect of consecutive constraints on early life stages with different habitat requirements. The purpose of the model was to compare the potential growth and survival of consecutive life stages in a spatially explicit manner when different habitat-based rules are imposed. The results highlight the importance of life history theory and knowledge of mechanisms used in habitat selection for determining limits to fish production.
Download or read book Food Web Interactions of Larval Yellow Perch Perca Flavescens in Lake Michigan Implications for Recruitment written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Variability in annual recruitment for many fishes is correlated with survival during the larval phase. Yellow perch in Lake Michigan have experienced sustained recruitment failure since 1990 and this has been blamed on low larval survival. Direct examination of factors important to larval yellow perch survival in Lake Michigan is complicated by the large size of the lake (52,000 km2) and the short length of the pelagic larval period (30-40 days). Individual-based modeling is a valuable indirect method for assessing the importance of multiple factors to larval survival. I used an individual-based modeling approach combined with field data collection to test four hypotheses regarding factors limiting survival of larval yellow perch in Lake Michigan. I tested whether larval survival is limited by prey community composition, size-selective predation, advection of larvae into offshore habitat or an interaction of these factors. I sampled larval and zooplankton abundance in Lake Michigan along a transect from 1 - 32 km from shore in 2000 and 2001. I conducted laboratory experiments to quantify larval vulnerability to predation by three typical predators as a function of both predator and prey size. I also conducted laboratory experiments to quantify larval selectivity for different zooplankton prey as a function of larval size and prey community composition. I used the results of these experiments to develop an individual-based model specifically to describe growth and survival of larval yellow perch. Field data suggest that larval yellow perch are being transported from the nearshore to the offshore zone of Lake Michigan, but the timing of this transport varies between years. Model simulations in which the offshore prey community and the timing of larval advection were both varied suggested that larval survival will be highest in years when advection occurs within two weeks of peak hatch, allowing larvae to exploit offshore prey resources early during ontogeny. The.
Download or read book The rate of growth of the yellow perch Perca flavescens in lake Erie written by William J. K. Harkness and published by . This book was released on 1922 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Population Dynamics and Reproductive Tactics of Yellow Perch Perca Flavescens and White Perch Morone Americana in Western Lake Erie written by George Matthew Bence Norton and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Zooplankton of the Great Lakes written by Mary D. Balcer and published by Univ of Wisconsin Press. This book was released on 1984 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers, instructors, and students will appreciate this compilation of detailed information on the crustacean zooplankton of the Great Lakes. The authors have gathered data from more than three hundred sources and organized into a useful laboratory manual. The taxonomic keys are easy to use, suitable for both classroom and laboratory identifications. Detailed line drawings are provided to help confirm the identification of the major species. Zoologists, limnologists, hydrobiologists, fish ecologists, and those who study or monitor water quality will welcome this dependable new identification tool. A concise summary of pertinent information on the ecology of these zooplankton is provided in the main body of the text. A check-list of all species reported from each of the Great Lakes and notes on the distribution and abundance of more than a hundred species were compiled from an extensive search of existing literature. In addition, the authors collected samples from several locations on Lake Superior, in order to provide information on the abundance and life histories of the major crustacean species.
Download or read book Estuarine Ecology written by John W. Day, Jr. and published by John Wiley & Sons. This book was released on 2012-11-19 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estuaries are among the most biologically productive ecosystems on the planet--critical to the life cycles of fish, other aquatic animals, and the creatures which feed on them. Estuarine Ecology, Second Edition, covers the physical and chemical aspects of estuaries, the biology and ecology of key organisms, the flow of organic matter through estuaries, and human interactions, such as the environmental impact of fisheries on estuaries and the effects of global climate change on these important ecosystems. Authored by a team of world experts from the estuarine science community, this long-awaited, full-color edition includes new chapters covering phytoplankton, seagrasses, coastal marshes, mangroves, benthic algae, Integrated Coastal Zone Management techniques, and the effects of global climate change. It also features an entriely new section on estuarine ecosystem processes, trophic webs, ecosystem metabolism, and the interactions between estuaries and other ecosystems such as wetlands and marshes
