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 Effects of Turbidity and Prey Density on the Foraging Success of Age 0 Yellow Perch Perca Flavescens written by Colleen G. Wellington and published by . This book was released on 2008 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous studies on yellow perch (Perca flavescens) foraging indicate that increased turbidity can impair foraging success, and that phytoplankton turbidity can reduce prey consumption more than sediment turbidity. Field data from western Lake Erie suggest that turbidity covaries with prey density. Prey consumption usually increases with prey density, but fish foraging in highly turbid areas may have a modified functional response and therefore not forage at the expected rate. I conducted laboratory experiments to determine how larval and juvenile yellow perch respond to changes in prey density when exposed to different levels and types of turbidity. In all turbidity conditions, consumption increased with increasing prey density. However, the functional response was modified by turbidity type, such that the slope of the consumption-prey density relationship was lower in phytoplankton than sediment turbidity. For larval yellow perch, this effect was dependent on the turbidity level (larger difference at higher turbidity), while for juveniles the difference in consumption with turbidity type was observed across all turbidity levels. Overall, prey density could not compensate for the negative effects of phytoplankton turbidity. These results reinforce the need to control factors leading to excessive phytoplankton blooms in lakes.

Download or read book The Effects of Impingement and Entrainment by the J R Whiting Plant on Yellow Perch Perca Flavescens Commercial and Sport Fisheries in Lake Erie written by Richard Michael Stanford and published by . This book was released on 1980 with total page 280 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 Yellow Perch Perca Flavescens Abundance in Inner Saginaw Bay Lake Huron 1971 2001 written by Sarah Ann Thayer and published by . This book was released on 2002 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Production Mortality and Power Plant Entrainment of Larval Yellow Perch in Western Lake Erie written by Richard L. Patterson and published by . This book was released on 1979 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Temperature Effects on Young Yellow Perch Perca Flavescens Mitchill written by J. Howard McCormick and published by . This book was released on 1976 with total page 30 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 Fisheries Research Report written by and published by . This book was released on 1989 with total page 22 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 Ecological Consequences of Hypoxia for Yellow Perch Perca Flavescens in Lake Erie written by James J. Roberts and published by . This book was released on 2010 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypoxia (

Download or read book The Effects of Algal Sediment Turbidity on Zooplankton Consumption by Young of Year Yellow Perch Perca Flavescens written by Brian Elkington and published by . This book was released on 2006 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Parental Size and Age on Larval Growth and Development written by Michael Alan Oetker and published by . This book was released on 1998 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Factors Influencing Habitat Shifts of Age 0 Yellow Perch Perca Flavescens in Southwestern Lake Michigan written by Scott Michael Miehls and published by . This book was released on 2006 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Hatching Growth and Overwinter Survival of Age 0 Yellow Perch Perca Flavescens Mitchill in Temperate Lakes of the Great Lakes Basin written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: