Download or read book Habitat Selection by Spawning Walleye and White Bass in Irrigation Reservoirs of the Republican River Basin Nebraska written by Dustin R. Martin and published by . This book was released on 2008 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Walleye and White Bass Recruitment in Southwest Nebraska Irrigation Reservoirs written by Jason Andrew DeBoer and published by . This book was released on 2013 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Walleye Sander vitreus and white bass Morone chrysops are among the most popular sportfish in the reservoirs of the Great Plains. Despite considerable effort by the Nebraska Game and Parks Commission stocking walleye and managing reservoirs for walleye and white bass, populations of walleye and white bass in southwest Nebraska reservoirs are dynamic, as erratic recruitment has led to “boom and bust” fisheries for these two species. We investigated 1) factors regulating walleye and white bass recruitment during an 18-year period at five reservoirs, and 2) walleye spawning ecology at two reservoirs that differ in their degree of environmental variability. The variables in the candidate model sets for walleye were most-often related to water-level drawdown. The variables in the candidate model sets for white bass were most-often related to adult white bass abundance and condition, and to factors affecting over-winter mortality of juvenile white bass. Despite significant differences in female body and liver masses between reservoirs that differ in environmental variability, we found no difference in reproductive investment measured by egg size and fecundity, which is counterintuitive to life-history theory.
Download or read book Recruitment of Walleye and White Bass in Irrigation Reservoirs written by Christopher W. Lewis and published by . This book was released on 2008 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recruitment of Walleye and White Bass in Irrigation Reservoirs written by Jason A. DeBoer and published by . This book was released on 2009 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Response of Walleye to the Addition of Spawning Substrate in a Nebraska Irrigation Reservoir written by Jordan D. Katt and published by . This book was released on 2009 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identifying White Bass Natal Origins and Quantifying Walleye and White Bass Stock Contribution in Lake McConaughy Nebraska written by Garrett Rowles and published by . This book was released on 2019 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake McConaughy is a socioeconomically important reservoir in Nebraska that provides a diversity of sport fishing opportunities. Stocking of White Bass and Walleye has occurred in Lake McConaughy since 1993 and 1943, respectively. Despite stocking efforts, White Bass relative abundances have been consistently below desired sampling levels and relative abundances of Walleye have declined but remain above the desired sampling objective. This study was designed to identify natal origins and quantify the contribution of hatchery-produced White Bass using otolith microchemistry and to quantify the contribution of hatchery-produced Walleye to the age-0 population. The first objective of this study was to identify spatially distinct and temporally stable microelements in Lake McConaughy, the North Platte River, and a tributary of the North Platte River to later us in identifying natal origins of White Bass. Elemental ratios of Sr:Ca, Ba:Ca, Mg:Ca, and Mn:Ca were found to be spatially distinct between types of location (i.e. "river," "tributary," or "reservoir"), but not between individual sites. All elemental ratios except for Mg:Ca were found to be temporally stable. The second objective was to quantify the contribution of hatchery-produced White Bass and identify natal origins of White Bass. White Bass were collected from the North Platte state fish hatchery and from cages placed in Lake McConaughy and the North Platte River to obtain known location elemental signatures. K nearest neighbor analysis identified 60 and 76% of collected age-0 White Bass as naturally-produced in 2017 and 2018, respectively. Finally, this study aimed to quantify the contribution of hatchery-produced Walleye in Lake McConaughy. Age-0 Walleye were collected from Lake McConaughy from 2016 - 2018 and otoliths were examined for OTC marks. Hatchery-produced age-0 Walleye comprised 88 - 96% of all age-0 Walleye collected each year. Additionally, mean total length of hatchery-produced age-0 Walleye was larger than that of naturally-produced age-0 Walleye.
Download or read book Habitat Selection of Adult Walleye Stizostedion Vitreum in Holter Reservoir Missouri River written by Keith Michael Binkley and published by . This book was released on 1996 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Population Model for Walleye in Nebraska Irrigation Reservoirs written by Robert A. Kill 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 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:
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.
Download or read book American Shad and Striped Bass Spawning Migration and Habitat Selection in the Neuse River North Carolina written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1952, a low-head dam was constructed at river kilometer (rkm) 225 on theNeuse River, NC, limiting migration of anadromous fishes beyond that point. In May of 1998, the dam was removed, giving improved access to 127 rkm of potential spawning habitat. We utilized radio telemetry during 1999 and 2000 to quantify the effects of dam removal on striped bass () and American shad () spawning migrations and habitat used. Locations oftelemetered striped bass and American shad were monitored continually throughout the spawning season. Spawning microhabitat utilized by American shad was compared to that available to them on the spawning grounds. No spawning habitat data werecollected for striped bass as they were widely distributed throughout the river and spawning was not observed. Of 22 telemetered American shad providing useable data,12 migrated beyond the former dam site. The average maximum distance migrated in 1999 and 2000 was 226 and 251 rkm, respectively. Of 23 striped bass providing usabledata, 15 migrated beyond the former dam site. The mean maximum distance migrated by striped bass in 1999 and 2000 was 218 and 250 rkm, respectively. In both years of this study, the primary American shad spawning grounds were located at rkm 239, 14rkm above the former dam site. Compared to available habitat, American shad used relatively coarse substrates consisting of gravel, cobble, and boulder. They also used intermediate current velocities (0.20-0.60 m/s) and depths (50-125 cm). The habitat they used after the removal of the dam, even though farther upstream, was similar to the habitat utilized prior to its removal.
Download or read book Walleye Spawning Requirements in Thunderbird Reservoir written by James Burr Mense and published by . This book was released on 1979 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early Life history Characteristics of Juvenile Fishes in Lake McConaughy Nebraska written by Matthew Perrion and published by . This book was released on 2016 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reservoir Fish Habitat Management written by Leandro Miranda and published by . This book was released on 2017-01-02 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dams Fish and Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of free longitudinal passage of river fauna is stressed.
Download or read book Restoration of Aquatic Ecosystems written by National Research Council and published by National Academies Press. This book was released on 1992-01-01 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
