Larval Drift Characteristics, Habitat Use, and Environmental Determinants of Year-class Strength in Wild Age-0 Lake Sturgeon, Acipenser Fulvescens, Within a Large Impounded River

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ISBN 13 :
Total Pages : 101 pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Larval Drift Characteristics, Habitat Use, and Environmental Determinants of Year-class Strength in Wild Age-0 Lake Sturgeon, Acipenser Fulvescens, Within a Large Impounded River by : Laura Henderson

Download or read book Larval Drift Characteristics, Habitat Use, and Environmental Determinants of Year-class Strength in Wild Age-0 Lake Sturgeon, Acipenser Fulvescens, Within a Large Impounded River written by Laura Henderson and published by . This book was released on 2013 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamics of early life stages of Lake Sturgeon ( Acipenser fulvescens) within a large impounded river were studied. Recruitment success, larval drift, and basic habitat and diet use were observed and analysed over a two-year period. As part of a separate study, larval drift monitoring, and juvenile gillnetting were conducted one year prior to the start of the current study; these results were considered preliminary work and included in the analyses. Timing, duration, and extent of larval drift varied from year to year. No correlation was found between year-class strength and water discharge or temperature. Post-drift, age-0 Lake Sturgeon were found in habitats consisting of sand substrates, in depths of greater than 6 m (maximum 24 m), and low to medium velocities (0.0- 0.4 m s-1 ). Diet was composed of Diptera, Ephemeroptera, Trichoptera and Nematoda. Age-0 Lake Sturgeon captured in Dorothy Lake only consumed Dipteran organisms. Nitrogen isotopes indicated that age-0 Lake Sturgeon captured in this lake were significantly different from those captured in other locations of the study area. Daily growth was calculated as 2.0 mm in total length and 0.20 g in weight from August through September. Findings from this study will aid in future age-0 Lake Sturgeon research and management including artificial propagation and nursery habitat remediation.

Lake Sturgeon Spawning Behavior, Larval Production and Juvenile Habitat Use Within the Lower Fox River, Wisconsin

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ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Lake Sturgeon Spawning Behavior, Larval Production and Juvenile Habitat Use Within the Lower Fox River, Wisconsin by : Stefan Tucker

Download or read book Lake Sturgeon Spawning Behavior, Larval Production and Juvenile Habitat Use Within the Lower Fox River, Wisconsin written by Stefan Tucker and published by . This book was released on 2020 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Sturgeon (Acipenser fulvescens) populations have experienced declines throughout much of the Great Lakes and are currently a target for restoration. The Lower Fox River is a highly modified river system that hosts a small remnant Lake Sturgeon population. Previous work confirms annual spawning and some natural reproduction but inconsistent monitoring yields little understanding to current status and sustainability of this population. Chapter 1 describes the biological attributes of the spawning adult stock during 2017-2019 and the environmental conditions surrounding these annual events. In addition to a demographic description of adults, spawning habitat quantity and quality were evaluated to showcase reproductive potential of Lake Sturgeon below the De Pere Dam in the Lower Fox River, Wisconsin. Our description of adult demographics suggest adequate population structure exists to support reproductive success and spawning occurs during favorable seasonal conditions; therefore this population should be capable of significantly higher levels of larval production. Examinations of spawning substrates, incubation habitats and egg predation identified several factors influencing the reproductive success of this population. Locations of spawning activity are problematic on this system due to temporal desiccation events, algae colonization and egg/larval dislodgment which may severely restrict egg and larval survival. Consistent monitoring of spawning adults and larval production would continue to describe the stability of this population. Improvements to habitat quality and quantity should become priority restoration actions to ensure reproductive success. The ability to improve egg and larval survival would provide the opportunity to assign restoration targets and assess the effectiveness of restoration strategies for this population. Chapter 2 continues to evaluate Lake Sturgeon habitat availability in the Lower Fox River by investigating the riverine use of juveniles. Expanding knowledge pertaining to early life stage habitats and movement patterns are listed as a critical need for management. Documented low levels of production within this river system make it uncertain if wild juveniles are present and to what extent nursery habitats exist. Previous habitat models suggest ample juvenile habitat is present, however a legacy of pollution and recent restoration actives to remove contained sediments and improve river condition, make it uncertain if the river is utilized as a nursery area. Age-0 Lake Sturgeon were implanted with hydro-acoustic transmitters and tracked for 40 days during late summer in 2018 and 2019 to document movement patterns and areas of occupancy in the Lower Fox River. Results demonstrate that juvenile Lake Sturgeon will reside in the river system for extended periods of time and congregate into focal habitat areas. Six core habitat areas were identified in the upper river section suggesting the presence of functional nursery habitat. This is the first documentation of juvenile Lake Sturgeon habitat use following restoration activities in the Lower Fox River and will serve to help guide future habitat improvements and further knowledge of juvenile life stage ecology in this river system. The information gathered in this study provides a greater understanding to the reproductive limitations of this population and early life history needs as well as assign restoration targets to improve Lake Sturgeon sustainability in the Lower Fox River.

Evaluation of Spawning Habiat, Juvenile Habitat, and Larval Drift of Lake Sturgeon (Acipenser Fulvescens) in the Big Manistee River, Michigan

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (589 download)

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Book Synopsis Evaluation of Spawning Habiat, Juvenile Habitat, and Larval Drift of Lake Sturgeon (Acipenser Fulvescens) in the Big Manistee River, Michigan by : Justin A. Chiotti

Download or read book Evaluation of Spawning Habiat, Juvenile Habitat, and Larval Drift of Lake Sturgeon (Acipenser Fulvescens) in the Big Manistee River, Michigan written by Justin A. Chiotti and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evaluating Collection, Rearing, and Stocking Methods for Lake Sturgeon (Acipenser Fulvescens) Restoration Programs in the Great Lakes

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ISBN 13 :
Total Pages : 388 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Evaluating Collection, Rearing, and Stocking Methods for Lake Sturgeon (Acipenser Fulvescens) Restoration Programs in the Great Lakes by : James Andrew Crossman

Download or read book Evaluating Collection, Rearing, and Stocking Methods for Lake Sturgeon (Acipenser Fulvescens) Restoration Programs in the Great Lakes written by James Andrew Crossman and published by . This book was released on 2008 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Production, Drift Behavior and Morphological Analysis of Outmigrating Larval Lake Sturgeon in the Menominee and Oconto Rivers, Wisconsin

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (926 download)

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Book Synopsis Production, Drift Behavior and Morphological Analysis of Outmigrating Larval Lake Sturgeon in the Menominee and Oconto Rivers, Wisconsin by : David Allen Lawrence

Download or read book Production, Drift Behavior and Morphological Analysis of Outmigrating Larval Lake Sturgeon in the Menominee and Oconto Rivers, Wisconsin written by David Allen Lawrence and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current populations of lake sturgeon (Acipenser fulvescens) are affected by many anthropogenic activities such as dams, pollution, development, and overharvest. Management and recovery efforts hinge on acquisition of basic biological data to better understand variation in recruitment. However, little information is available regarding differences in spawning time, egg development, and larval ecology between river systems that harbor remnant populations. The objectives of this study were to compare and contrast the relative production of larval lake sturgeon observed within and between populations over multiple reproductive seasons, and to evaluate whether there is evidence for morphological differences between larval lake sturgeon that have experienced quite different incubation conditions. Transects of standard D-frame drift nets were deployed below known spawning sites in both the Menominee River, Wisconsin in 2012, 2013 and 2014 (10 nets, evenly spaced along a 200 meter wide transect, 800 meters downstream from the Hattie Street Dam), and the Oconto River, Wisconsin in 2013, 2014 and 2015 (6 nets evenly spaced along a 60 meter wide transect, 1,250 meters downstream from Stiles Dam). A total of 4,442 larvae were captured across all seasons and both rivers. Significant differences were seen in both the number and length of larval lake sturgeon across the Menominee and Oconto Rivers. Rates of change in average body size were significantly different among annual drift events. This information had practical management connections to estimating population recruitment, as well as, providing a better understanding of lake sturgeon early life history patterns on a system by system basis.

Movements, Habitat Use, and Abundance of Lake Sturgeon (Acipenser Fulvescens) in Lake Champlain

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ISBN 13 :
Total Pages : 314 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Movements, Habitat Use, and Abundance of Lake Sturgeon (Acipenser Fulvescens) in Lake Champlain by : Lisa K. Izzo

Download or read book Movements, Habitat Use, and Abundance of Lake Sturgeon (Acipenser Fulvescens) in Lake Champlain written by Lisa K. Izzo and published by . This book was released on 2021 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake sturgeon (Acipenser fulvescens) in Lake Champlain were listed as endangered in 1972. Significant gaps exist in understanding lake sturgeon in the system as well as the methods needed to properly monitor and assess them. My research had three main goals: (1) investigate movements and habitat use of lake sturgeon in the Lake Champlain basin, (2) develop a method to estimate lake sturgeon abundance using sonar technology, and (3) test an alternative method for aging lake sturgeon. One of the primary information gaps for lake sturgeon in Lake Champlain is an understanding of the movements and habitat use of multiple life stages. I used acoustic telemetry to describe seasonal movement patterns and distribution of adult and juvenile lake sturgeon and to quantify the spatial overlap between these life stages. We found that juvenile and adult home ranges overlapped in shallow ( 10 m) water in the summer and fall. During the winter, adults remained in shallow water and juveniles moved to deep-water ( 25 m) overwintering sites. These results identified important areas for lake sturgeon and indicated that there are seasonal differences in habitat use between life stages. I also used acoustic telemetry to describe adult lake sturgeon movement patterns during the spawning period and to investigate environmental drivers of these movements in the Winooski River. River discharge, temperature, the magnitude and direction of the change in temperature (3-day lag), and time of day were significant factors in describing upstream movements. Adult lake sturgeon displayed general movement patterns that included a single run upstream, upstream and downstream movements throughout the river, or multiple runs made up the entire length of the spawning tributary to the spawning site. An understanding of the movements during the spawning period was key in the method I developed to estimate lake sturgeon abundance. To estimate abundance of lake sturgeon spawning in the Winooski River, I used acoustic telemetry data from adult lake sturgeon to estimate observation probability of the sonar and the probability that a lake sturgeon had been seen previously during the season. Using a Bayesian integrated model, I combined these parameters with counts from a dual-frequency identification sonar (DIDSON) to estimate abundances each year: 110 (47 -- 229 CI) in 2017, 133 (79 -- 242 CI) in 2018, and 99 (51 -- 220 CI). The results of this work represent the first estimate of abundance for spawning lake sturgeon in a Lake Champlain tributary, and will be key to tracking progress towards lake sturgeon recovery moving forward. Age data in long-lived species such as lake sturgeon can point to signs of successful recruitment and recovery. I investigated use of the second marginal pectoral fin ray as an alternative, less invasive method for estimating ages of lake sturgeon. The variability of age estimates among different readers and fin structures indicated that the second fin ray may provide some utility to age juvenile lake sturgeon but is not a viable substitute for estimating ages of adult lake sturgeon. These results provide valuable information to managers looking to gain essential age data while also decreasing the impact of handling endangered lake sturgeon.

Creating a Spatially-explicit Habitat Suitability Index Model for Lake Sturgeon (Acipenser Fulvescens) in the Maumee River, Ohio

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ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Creating a Spatially-explicit Habitat Suitability Index Model for Lake Sturgeon (Acipenser Fulvescens) in the Maumee River, Ohio by : Jessica J. Collier

Download or read book Creating a Spatially-explicit Habitat Suitability Index Model for Lake Sturgeon (Acipenser Fulvescens) in the Maumee River, Ohio written by Jessica J. Collier and published by . This book was released on 2018 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiversity and ecological function are increasingly threatened by human impacts including fragmented systems, modified water and sediment flow, pollution, habitat degradation and alteration, overexploitation of species, and invasive species introduction. These impacts necessitate the need for conservation and restoration practices to protect natural resources and biodiversity. This dissertation outlines the development and implementation of habitat suitability index (HSI) models as tools to support species reintroduction efforts and monitor populations of imperiled species. Lake sturgeon (Acipenser fulvescens), a state listed species in Ohio, are a candidate for reintroduction in the Maumee River, Ohio, where they were historically abundant, but are now functionally extirpated. The goal of my dissertation was to determine if current habitat quantity and quality in the Maumee River are sufficient to support lake sturgeon reintroduction using habitat suitability index models for two important life stages: spawning adult and age-0 fish. The models I developed, using substrate, water velocity, and water depth, indicated that habitat quality, quantity, and connectivity for both spawning adult and age-0 lake sturgeon would support efforts to reintroduce this species. The results of these HSI models were used in the development of a reintroduction plan to summarize important elements for successful reintroduction efforts. The reintroduction plan provided a comprehensive outline incorporating biological, managerial, and societal perspectives, to identify potential barriers to lake sturgeon reintroduction and highlight direct actions to increase success. HSI models are valuable tools for reinforcing species restoration plans and improve conservation monitoring. After the development of the lake sturgeon HSI models for the Maumee River, I wanted to further investigate if the model structure and habitat data could be utilized for other species in the Maumee River. I tested model transferability on native unionid communities, a highly imperiled group of organisms, and found that the HSI model structure successfully predicted higher unionid abundances in habitats designated as high-quality, compared to marginal and unsuitable habitats. The models developed in this dissertation provide a tool for resource managers to evaluate restoration practices and monitor species populations which will help protect biodiversity and sustain our natural resources.

Field and Experimental Studies Find Variation in Levels of Larval Lake Sturgeon Predation is Associated with Behavior and Environmental Conditions

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.8/5 (417 download)

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Book Synopsis Field and Experimental Studies Find Variation in Levels of Larval Lake Sturgeon Predation is Associated with Behavior and Environmental Conditions by : Joseph Jerry Riedy

Download or read book Field and Experimental Studies Find Variation in Levels of Larval Lake Sturgeon Predation is Associated with Behavior and Environmental Conditions written by Joseph Jerry Riedy and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Species are vulnerable to predation during early in life stages, especially those who provide little or no parental care. Predation risk is further elevated during periods of migration when individuals are exposed to a greater abundance and diversity of predators. Levels of predation during migration are often variable and can be heavily influenced by environmental conditions and changes in behavior. It is important to understand how these factors influence predation rates of threatened and endangered species. Lake sturgeon are an imperiled species native to the Great Lakes, Mississippi River, and Hudson Bay drainages that undergo a downstream from spawning grounds to nursery habitat at the beginning of the larval stage. This migration begins at night and larvae are exposed to several known predator species as they migrate the length of the spawning river in event. In this dissertation, I examine influences of ecological factors and behavior on levels of predation during the downstream migration. In Chapters 1 and 2, I used mesocosm experiments to determine the effects of night light level, rearing temperature, and prey abundance on survival during migration. Survival is highest during the environmental conditions present early in the season: new moon light levels, colder rearing conditions, and when prey abundance is high. In Chapters 3 and 4, I returned to the mesocosms to examine the survival implications of the behavioral responses to alarm cues during the larval stage. Lake sturgeon larvae exposed to a predator species odor and lake sturgeon alarm cue have higher survival rates when later exposed to the predator species. Additionally, lake sturgeon can use alarm cues from unrelated allopatric and sympatric species as kairomones similarly to conspecific alarm cues. In Chapter 5, I collected lake sturgeon larvae and predator diets from a natural lake sturgeon spawning stream to estimate nightly mortality rates, identify the predatory species that consumed, and determine the environmental factors that influence lake sturgeon mortality in a wild population. Survival rates varied greatly, but on average, approximately one third of lake sturgeon larvae survived the section of the river sampled. Additionally, roughly one third of all potential predator diets sampled contained lake sturgeon. Similar to previous chapters, light level and the abundance of prey had the greatest influence on the survival rates of lake sturgeon and the probability of detecting lake sturgeon in the diets of potential predators. Results indicate the timing of lake sturgeon spawning influences larval survival by determining the ecological conditions present during offspring development and downstream migration. Work presented here identifies the factors with the strongest influence on larval lake sturgeon survival. Though variation in larval lake sturgeon mortality is high, managers may begin to use these factors to forecast larval lake sturgeon survival rates in populations. It will be important to monitor changes to these ecological variables, such as fluctuations in co-distributed fish and invertebrate populations, and variation in water temperatures during development, because these factors have strong and predictable influences lake sturgeon recruitment rates.

Establishment of and Egg and Larval Development Index for Lake Sturgeon Acipenser Fulvenscens

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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (878 download)

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Book Synopsis Establishment of and Egg and Larval Development Index for Lake Sturgeon Acipenser Fulvenscens by : Orey T. Eckes

Download or read book Establishment of and Egg and Larval Development Index for Lake Sturgeon Acipenser Fulvenscens written by Orey T. Eckes and published by . This book was released on 2013 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the development of production scale cultural practices many federal, state and tribal agencies have developed restoration plans consisting of managing and enhancing wild populations of lake sturgeon Acipenser fulvescens. A lake sturgeon egg and larval development index was created to incrementally chart development over time. This index provides a tool for accurately predicting and manipulating timing of development stages. Fish culturists and fisheries resources managers may use this index in ongoing restoration programs to assist in the recovery and restoration of lake sturgeon populations.

Fish Passage Technologies

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Publisher : Office of Technology Assessment
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Fish Passage Technologies by :

Download or read book Fish Passage Technologies written by and published by Office of Technology Assessment. This book was released on 1995 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sturgeons and Paddlefish of North America

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Publisher : Springer Science & Business Media
ISBN 13 : 1402028334
Total Pages : 336 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Sturgeons and Paddlefish of North America by : G.T.O LeBreton

Download or read book Sturgeons and Paddlefish of North America written by G.T.O LeBreton and published by Springer Science & Business Media. This book was released on 2006-01-20 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern North American sturgeons and paddlefish are the result of 100 million years of evolution. Once an integral part of aboriginal culture, their numbers were decimated by overfishing and habitat destruction during the past two centuries. This book details the extensive science aimed at helping these remarkable species recover from the brink of extinction, and describes the historical, biological, and ecological importance of North American sturgeon and paddlefish. The text is enhanced by photographs and detailed line drawings. This comprehensive volume will be an invaluable resource for researchers, educators, and consultants, in academic and government settings, who work to further scientific understanding of these fishes. No other single compilation has documented current information in such detail.

Action Before Extinction

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ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Action Before Extinction by : World Fisheries Trust

Download or read book Action Before Extinction written by World Fisheries Trust and published by . This book was released on 1998 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Biology, Management, and Culture of Walleye and Sauger

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ISBN 13 : 9781934874226
Total Pages : 600 pages
Book Rating : 4.8/5 (742 download)

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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:

Freshwater Biodiversity

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Publisher : Cambridge University Press
ISBN 13 : 1108882625
Total Pages : 517 pages
Book Rating : 4.1/5 (88 download)

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Book Synopsis Freshwater Biodiversity by : David Dudgeon

Download or read book Freshwater Biodiversity written by David Dudgeon and published by Cambridge University Press. This book was released on 2020-05-21 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.

Garrison Diversion Unit

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ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.A/5 ( download)

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Book Synopsis Garrison Diversion Unit by : United States. Department of the Interior

Download or read book Garrison Diversion Unit written by United States. Department of the Interior and published by . This book was released on 1960 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

From the Forest to the Sea

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Publisher : CRC Press
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis From the Forest to the Sea by : Chris Maser

Download or read book From the Forest to the Sea written by Chris Maser and published by CRC Press. This book was released on 1994-05 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This is a very readable book in which the ecological concepts are carefully explained and the glossary of key terms will be a welcome inclusion for those getting to grips with ecology. The book will therefore appeal to a wide readership of aquatic ecologists and foresters, both professional and amateur alike". Scottish Forestry Royal Scottish Forestry Society"...the book makes a very significant contribution to our growing awareness of the ecological importance of driftwood. This contribution is founded on two particular aspects of the book: the writing style, which is clear and directed very much at the general reader; and the scope of the book, which is very broad and, to my knowledge, goes far beyond other reviews of the topic". Angela Gurnell School of Geography, University of Birmingham British Journal of Forestry"This is not a review article containing a current review of all works on wood in aquatic ecosystems. Instead, it is a comprehensive treatment of the general role of wood". J.L. Tank and J.R. Webster Journal of the North American Benthological SocietyFrom the Forest to the Sea: The Ecology of Wood in Streams, Rivers, Estuaries and Oceans is a fascinating scientific work that discusses the role wood plays in very complex and diverse aquatic ecosystems. Until now almost nothing has been published on this little understood topic.-- European settlement and laissez-faire capitalism-- Streams-- The Sea-- The Sea and estuaries-- Rivers

Conservation Biology

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Publisher : Springer Science & Business Media
ISBN 13 : 1402068913
Total Pages : 491 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Conservation Biology by : Fred Van Dyke

Download or read book Conservation Biology written by Fred Van Dyke and published by Springer Science & Business Media. This book was released on 2008-02-28 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fred Van Dyke’s new textbook, Conservation Biology: Foundations, Concepts, Applications, 2nd Edition, represents a major new text for anyone interested in conservation. Drawing on his vast experience, Van Dyke’s organizational clarity and readable style make this book an invaluable resource for students in conservation around the globe. Presenting key information and well-selected examples, this student-friendly volume carefully integrates the science of conservation biology with its implications for ethics, law, policy and economics.