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Walleye Sander Vitreus Spawning Habitat Selection And Dynamics In A North Temperate Wisconsin Lake
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Book Synopsis Walleye (Sander Vitreus) Spawning Habitat Selection and Dynamics in a North-temperate Wisconsin Lake by : Joshua K. Raabe
Download or read book Walleye (Sander Vitreus) Spawning Habitat Selection and Dynamics in a North-temperate Wisconsin Lake written by Joshua K. Raabe and published by . This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of Walleye (Sander Vitreus) Spawning Potential in a North Temperate Wisconsin Lake by : Lauren E. Williamson
Download or read book An Evaluation of Walleye (Sander Vitreus) Spawning Potential in a North Temperate Wisconsin Lake written by Lauren E. Williamson and published by . This book was released on 2008 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relations Between Walleye (Sander Vitreus) Recruitment and Spawning Habitat in Northeastern Wisconsin Lakes by : Gina M. Rammer
Download or read book Relations Between Walleye (Sander Vitreus) Recruitment and Spawning Habitat in Northeastern Wisconsin Lakes written by Gina M. Rammer and published by . This book was released on 2010 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Habitat Suitability Information by : Thomas E. McMahon
Download or read book Habitat Suitability Information written by Thomas E. McMahon and published by . This book was released on 1984 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Walleye (Sander Vitreus) Spawning Habitat Suitability and Reproductive Success in the Sandusky River (Ohio, USA) by : Daniel Adam Gillenwater
Download or read book Modeling Walleye (Sander Vitreus) Spawning Habitat Suitability and Reproductive Success in the Sandusky River (Ohio, USA) written by Daniel Adam Gillenwater and published by . This book was released on 2005 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Dam removal is becoming an increasingly popular tool for river restoration throughout the United States. One of the most controversial dam removal proposals in the Lake Erie Watershed involves the Ballville Dam on the Sandusky River (Ohio). The Sandusky River is one of the major spawning tributaries for Lake Erie walleye (Sander vitreus). However, the dam located at river kilometer 29, blocks the fish from reaching upstream gravel beds and forces them to spawn below the Ballville Dam. It has been suggested that removing the dam will increase walleye reproductive success and thus the returning spawning population. This work is divided into two separate studies that focus on different aspects of the impacts the Ballville Dam has on the walleye population in the Sandusky River. An existing ecological model of walleye spawning and early life history stages in the Sandusky River is validated using in-situ egg deposition and larval drift data collected during the 2003 and 2004 spawning seasons. The results indicate that the model results agree with field observations for a spawning population of 2000 to 5000 females. However, this number of females is insufficient to saturate the below-dam spawning grounds, and therefore no increase in egg deposition or larval production is noted for without-dam simulations. A GIS-based habitat suitability model of an area of the currently available spawning grounds in the Sandusky River was also created and validated. The model was able to give a reasonable indication of habitat suitability dynamics in the current spawning grounds. However, there was difficulty resolving velocities in complex areas of the channel. The results indicate that floods with discharges exceeding 100 m3/s can reduce the area of suitable habitat to almost zero. Reproductive success in a given year may therefore rely heavily on the length of the spawning season and the discharge patterns. The results of the two models offer new insight into the removal of the Ballville Dam. However, coupling the two systems (an ecological model and a high resolution habitat suitability model) would give the most complete assessment of the potential impacts of the removal of the Ballville Dam on the walleye population in the Sandusky River.
Book Synopsis Evaluating Walleye (Sander Vitreus) Thermal and Optical Habitat Occupancy in Northern Wisconsin Lakes Using Two Forms of Technology by : Benjamin R. Vasquez
Download or read book Evaluating Walleye (Sander Vitreus) Thermal and Optical Habitat Occupancy in Northern Wisconsin Lakes Using Two Forms of Technology written by Benjamin R. Vasquez and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Walleye Habitat Use, Spawning Behavior, and Egg Deposition in Sandusky Bay, Lake Erie by : Adam L. Thompson
Download or read book Walleye Habitat Use, Spawning Behavior, and Egg Deposition in Sandusky Bay, Lake Erie written by Adam L. Thompson and published by . This book was released on 2009 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Understanding habitat selection in fish can reveal areas critical for a population's continuation in the ecosystem. In systems experiencing habitat alterations or reductions in population sizes, identifying habitat use takes on increased importance. To facilitate our understanding of potential factors limiting the success of walleye (Sander vitreus) in Sandusky Bay, Lake Erie, we combined walleye locations determined from radio telemetry with habitat predictor variables to model habitat use and reveal sex-specific patterns of habitat use throughout the spawning season (Chapter 2). Models revealed that the presence of preferred walleye spawning substrate, gravel and cobble, was an important predictor of walleye locations during the entire spawning season, and depth and distance from shore were important particularly prior to the spawn. In examining sex-specific patterns of habitat use, we discovered that males were more likely to occur over gravel and cobble substrates than females. We hypothesize that males establish position in these areas in anticipation of spawning females. Only a small proportion of walleye tagged in Sandusky Bay migrated to upstream spawning grounds (2 of 197; 1%). To confirm whether walleye spawning occurs in Sandusky Bay and to analyze how spawning substrate might affect egg deposition rates and viability, we compared eggs collected using spawning mats from gravel/cobble and sand/silt substrates (Chapter 3). Egg deposition and egg viability were not significantly different between substrates, and the majority of walleye eggs were collected from one site that contained gravel and cobble. The combined results of this investigation reveal that the Sandusky Bay is a spawning ground for walleye and that preferred spawning substrate is an important factor predicting the location of walleye during the spawn. Because the amount of spawning habitat in this system has declined by an estimated 92% during the past century, we recommend that conservation and restoration steps be taken to preserve this walleye spawning population.
Book Synopsis Spawning Habitats of Walleyes Sander Vitreus in Lake Bemidji, Minnesota by : Matthew J. Sperry
Download or read book Spawning Habitats of Walleyes Sander Vitreus in Lake Bemidji, Minnesota written by Matthew J. Sperry and published by . This book was released on 2006 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio telemetry, larval fish sampling, egg baskets, and scapnetting were utilized to determine walleye Sander vitreus spawning sites in Lake Bemidji, Minnesota, during the spring spawning periods of 2002 through 2004. Some walleye populations travel from their lake environments into rivers or streams to spawn, but Lake Bemidji walleyes appear to be lake spawners. No tracked walleyes were found in river habitats during the 2002 spawning season. Based on radio telemetry, six putative spawning areas were located: Rocky Point at Lake Bemidji State Park, northwestern shore of the north basin, weed beds (bulrush Scirpus spp.) on each side of the Mississippi River outlet on the east side of the lake, Diamond Point, and the ridge between Diamond Point and the outlet of the Mississippi River. The greatest concentration of spawning walleyes occurred along the ridge between Diamond Point and the outlet of the Mississippi River in relatively shallow water over more coarse substrate than is typically found in the lake. No walleye eggs were found in egg baskets placed in putative spawning areas during 2003, but one was found by scapnetting on the ridge off of Diamond Point during spring 2004. These methods were conducted in shallow waters less than 1.5 m deep. Spawning shoals may be relatively small and isolated in waters deeper than 1.5 m. further studies utilizing a combination of SCUBA or an underwater video camera and scapnetting should be conducted to pinpoint spawning sites in deeper waters. Based on the presence of adequate natural recruitment, the amount of walleye spawning habitat does not appear to be limiting. Thus, habitat enhancement is not recommended at this time.
Book Synopsis The Behavioral Ecology of Walleye (Sander Vitreus) by : Andrew Peter Bade
Download or read book The Behavioral Ecology of Walleye (Sander Vitreus) written by Andrew Peter Bade and published by . This book was released on 2021 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many migratory animals time reproduction using environmental cues (e.g., photoperiod) that signal favorable conditions for offspring (e.g., food availability). However, environmental change can decouple these cues from the conditions relevant to offspring success. In turn, variation in reproductive behaviors may be critical to population persistence in a changing environment. For example, while natal homing can lead to valuable local adaptations in a stable environment, straying to new breeding sites can buffer against environmental change. Among exploited species, knowledge of reproductive behavior, such as spawn timing (phenology) and spawning site selection, has proven useful to fisheries management by influencing angling dynamics, estimates of biological reference points, and stock delineations. Thus, a well-developed understanding of reproductive phenology, breeding site selection, and fishery dynamics could help agencies effectively conserve and manage fisheries in ecosystems experiencing environmental change. Accordingly, my dissertation research sought to better understand the reproductive behaviors and angling dynamics of Lake Erie’s walleye population. In collaboration with other researchers and agency biologists, I used acoustic telemetry, creel surveys, environmental monitoring data, and quantitative techniques to discern the spawning behaviors and angling dynamics of this population. We assessed the timing of residency in spawning sites, focusing on how environmental cues and individual characteristics drive observed variation (Chapter 2), developed a quantitative framework to estimate the frequencies of each potential spawning site selection strategy (Chapter 3), demonstrated sex based-differences in spawning behavior and male-biased walleye harvest during the spawning season (Chapter 4), and modeled the impact of fishery characteristics and angler behaviors on recreational catch outcomes (Chapter 5). Each chapter generated new insights to the benefit of fisheries management through advances in our understanding of reproductive ecology and angling dynamics. In Chapter 2, we found that the timing of residency in spawning sites differed between sexes and among spawning locations and was controlled by photoperiod and temperature. The varying responses to warming suggest that reproductive resilience is promoted by conserving local spawning populations and a broad age structure. The findings from Chapter 3 demonstrated that, although spawning site fidelity and annual spawning are common, apparent skipped spawning also occurs (~ 14% of observations). Accounting for this potential skipped spawning led to revised biological reference points, owing to adjusted estimates of spawning stock biomass. Additionally, although few walleye strayed, the pattern of straying indicated that some stocks mix heavily. In Chapter 4, we found strong evidence for sex-specific spawning behaviors, with males occupying spawning grounds longer than females, which helped explain male-biased walleye harvest on the spawning grounds. Lastly, in Chapter 5, modeling creel survey data showed that angler decisions influenced catch outcomes more than abundance of the targeted walleye population. The findings from this chapter can help anglers maximize their probability of fishing success, given desired catch outcomes. The improved understanding of Lake Erie walleye reproductive behavior, angling dynamics, and the relationships between them, should help agencies worldwide keep their valued fish populations sustainable in the face of continued environmental change.
Book Synopsis Spawning Habitat Assessment and Relationship to Walleye Recruitment in Northern Wisconsin Lakes by : Jacob T. Richter
Download or read book Spawning Habitat Assessment and Relationship to Walleye Recruitment in Northern Wisconsin Lakes written by Jacob T. Richter and published by . This book was released on 2015 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Zhao, Yingming Publisher :Library and Archives Canada = Bibliothèque et Archives Canada ISBN 13 :9780494078679 Total Pages :394 pages Book Rating :4.0/5 (786 download)
Book Synopsis Climate and Dynamics of Walleye (Sander Vitreus, Formerly Stizostedion Vitreum Vitreum) Populations in North America [microform] by : Zhao, Yingming
Download or read book Climate and Dynamics of Walleye (Sander Vitreus, Formerly Stizostedion Vitreum Vitreum) Populations in North America [microform] written by Zhao, Yingming and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2005 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climatic conditions significantly influenced growth of walleye in North America. Genetically distinct walleye populations appear to have developed their own adaptation strategies to respond to their regional climatic conditions. Walleye early growth rate showed a significant latitudinal trend: the populations at low latitudes, experiencing high thermal input, had a high early growth rate (o) and a high value for k, the rate of approaching asymptotic length (Linfinity) as defined in the von Bertalanffy growth model. However, the impact of climatic conditions on walleye growth in later life, as characterized by L infinity was not significant. In Lake Erie, three walleye sub-populations (i.e. the western basin, Van Buren Bay, and Grand River) showed distinct demographic characteristics. The western basin walleye had a lower early growth rate than the eastern basin walleye. The differences in early growth rate among these walleye subpopulations were associated with the differences in thermal regimes experienced by each sub-population during the growing season. The overheated western basin provided the worst growth habitat for walleye during summer/fall. Younger fish cannot avoid these overheated conditions and thus may be exhibiting reduced growth rates because of the unsuitable growth habitat in the western basin. The survival rates of adult walleye in the eastern basin were higher than the lakewide average, but the abundance was less than one percent of the lakewide adult walleye abundance. The warmer and clearer water conditions in 1998 created more walleye habitat than in 1993. The increases in water temperature and decreases in water level that may result from climate change will have different impacts on the habitat suitable for walleye among the three basins, with the greatest effect in the western basin. A simulation study showed that density-dependent early survival and density-dependent adult growth and egg production significantly affect the dynamics of the walleye metapopulation in Lake Erie. Walleye early survival (i.e. recruitment) could be a bottleneck, setting the overall sizes of the western basin and eastern basin sub-populations. This bottleneck would be sensitive to the changes in habitat expected from climate change.
Book Synopsis Biology, Management, and Culture of Walleye and Sauger by : Bruce A. Barton
Download or read book Biology, Management, and Culture of Walleye and Sauger written by Bruce A. Barton and published by . This book was released on 2011-01-01 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Muskellunge Management by : Kevin L. Kapuscinski
Download or read book Muskellunge Management written by Kevin L. Kapuscinski and published by . This book was released on 2017 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Percid Fishes written by John F. Craig and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: The percid fishes (or perch family) comprise many species including the perch, pikeperch, yellow perch, walleye and the darters. These species are of great ecological and economic importance, being important components of the freshwater ecosystem and recreational and commercial fisheries. Percid Fishes covers aspects such as systematics, morphology, biology, ecology, diseases and parasites and the economic importance of percid fisheries. Special emphasis is placed within the book on the complex relationship between this family of fishes and their environment and how they respond to perturbations, especially those induced by humans. The author, John Craig who has a great deal of experience working on these fishes in many of the countries in which they occur, has drawn together an extremely important book which provides a unique, comprehensive and indispensable review of this most significant group of fish.
Book Synopsis Modelling and Quantitative Methods in Fisheries by : Malcolm Haddon
Download or read book Modelling and Quantitative Methods in Fisheries written by Malcolm Haddon and published by CRC Press. This book was released on 2001-05-31 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative methods and mathematical modelling are of critical importance to fishery science and management but, until now, there has been no book that offers the sharp focus, methodological detail, and practical examples needed by non-specialist fishery scientists and managers, and ecologists. Modelling and Quantitative Methods in Fisheries fills that void. To date, methodology books in fisheries science have been limited to cookbook approach to problems; simple compilations; or expositions in which either too much theory or insufficient methodological detail is given. The text is organized into three sections: an introduction to modelling in fisheries and ecology, a straight methodology section covering a range of methods, and a section focusing on specific fields in fisheries science. This book is timely as it addresses a topic of recent debate in fisheries and ecology, describing and comparing the uses of Least Squares, Maximum Likelihood, and Bayesian quantitative methods. Designed as stand-alone units, each chapter provides examples from both classic and recent literature and comes with dedicated Excel spreadsheets that permit you to delve into every detail of the analysis. All of these spreadsheets serve as active examples, which can easily be modified and customized and can be used as templates for analyzing your own data. The spreadsheets permit you to learn at your own speed and cover the simplest linear regression to the more complex non-linear modelling using maximum likelihood. Data analysis and modelling are best learned by doing and not just by reading. This book illustrates, step by step, the analyses it covers. More detailed in terms of introductory quantitative methods and modelling as applied to fisheries than any other book available, Modelling and Quantitative Methods in Fisheries gives you the advantage by supplying the full details of the analysis so that understanding the material is a matter of following the book.
Book Synopsis Knowing Yellowstone by : Jerry Johnson
Download or read book Knowing Yellowstone written by Jerry Johnson and published by Rowman & Littlefield. This book was released on 2010-06-16 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visitors to Yellowstone National Park are drawn to the spectacular scenery, unique thermal features, and the large numbers of wild animals easily observed in their natural habitat. The thoughtful visitor to the park cannot help but be captivated by the unparalleled breadth of scientific knowledge needed to understand the intricate interrelationships that make up the yellowstone landscape. Knowing Yellowstone explores how scientists discover what they know about America's first national park and the surrounding lands. The chapter authors are scientists who represent the best of their fields of study. The science they describe is leading the way to our understanding of complex ecosystems worldwide.
Book Synopsis The Raymond J. H. Beverton Lectures at Woods Hole, Massachusetts by : R. J. H. Beverton
Download or read book The Raymond J. H. Beverton Lectures at Woods Hole, Massachusetts written by R. J. H. Beverton and published by National Marine Fisheries Service. This book was released on 2002 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains transcripts of 3 lectures on fisheries science given by Raymond J.H. Beverton May 2-3, 1994.
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