Download or read book The Effects of Spring Climate Spawner Abundance and Cannibalism on the Abundance of Rainbow Smelt Osmerus Mordax at Two Sites in the Upper Great Lakes written by Robert Daniel Sluka and published by . This book was released on 1991 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report to Congress Great Lakes Fishery Resources Restoration Study Report written by U.S. Fish and Wildlife Service and published by . This book was released on 1995 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Review written by and published by . This book was released on 1992 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydroacoustic Evaluation of Rainbow Smelt Osmerus Mordax Abundance Spatial Distribution and Cannibalism in Lake Champlain written by Sandra L. Parker-Stetter and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 2005 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Lake Utopia Rainbow Smelt Osmerus Mordax Spawner Abundance and Allowable Harm written by Fisheries and published by . This book was released on 2016 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Updated Estimate of Lake Utopia Rainbow Smelt Osmerus Mordax Large bodied Population Spawner Abundance and Allowable Harm written by Canadian Science Advisory Secretariat and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rainbow Smelt Osmerus Mordax in Lake Champlain written by Jennifer L. Stritzel Thomson and published by . This book was released on 2006 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainbow smelt (Osmerus mordax) occupy the middle of the pelagic foodweb in Lake Champlain as zooplanktivores and cannibals, while serving as the major forage fish for piscivores. The focus of this study was to (i) relate spatial and temporal distributions of young-of-the-year (YOY) and yearling-and-older (YAO) smelt to zooplanktivory patterns and (ii) to determine the effects of density and availability of larger prey (Mysis relicta and YOY smelt) on smelt individual growth rates. We used hydroacoustics to obtain smelt abundance, midwater trawling to verify acoustic targets and to collect fish for size and stomach content information, and sampled zooplankton with vertical tows throughout the lake from June to September in 2001 and 2002. From these data, diets of smelt and zooplankton consumption were related to zooplankton abundance and species composition and we calculated individual growth rates of smelt. The 2001 smelt yea class was very large, which subsequently resulted in a large number of YAO smelt in 2002. Therefore, in 2001 YOY smelt consumed a major portion of the available zooplankton whereas the majority was consumed by YAO smelt in 2002. Through bioenergetics modeling and zooplankton production estimates, we determined that zooplankton production remained positive in most months and areas during both years despite high consumption of zooplankton by smelt. Seasonally, smelt consumed more zooplankton in September than in June or July. Through AIC analyses, we concluded that YOY growth rates were negatively influenced by YOY density and YAO growth rates were positively influenced by the abundance of Mysis in diets. The findings of this study provide a substantial contribution to our knowledge of the Lake Champlain food web, especially in light of the recent invasion of alewife (Alosa pseudoharengus). Preinvasion levels of smelt consumption and growth rates will be the information needed to document the effect of alewife on the food web as the alewife population becomes more abundant.
Download or read book Updated Estimate of Lake Utopia Rainbow Smelt Osmerus Mordax Large bodied Population Spawner Abundance and Allowable Harm written by and published by . This book was released on 2018 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating Lake Utopia Rainbow Smelt Osmerus Mordax Spawner Abundance and Allowable Harm written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The spawning period is of a short duration, approximately 5 days, and can begin before the ice is out of the lake. [...] At the time of the study, a beaver dam was across the mouth of a culvert under Route 785 located at the outflow of Mill Lake Stream. [...] The spawning tributaries of the large-bodied form of LURS, Mill Lake Stream and Trout Lake Stream, are located at the northeast portion of the lake. [...] Through real-time reporting of the presence of smelt, DFO initiated the mark-recapture project when the smelt appeared at the mouth of Mill Lake Stream at the beginning of spawning season. [...] However, the increase in nightly spawner abundance between the first and last day of sampling suggests that there is immigration and the system may not be closed, a violation of the assumptions of the Schnabel method, which would result in a less precise estimate.
Download or read book Management and Ecology of Lake and Reservoir Fisheries written by Ian G. Cowx and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this comprehensive edited book, international experts infisheries management and ecology review and appraise the status oflake and reservoir fisheries, assessment of fisheries yields,trophic ecology, rehabilitation and conservation, including aspecial section on African lakes where so much information of hugerelevance to fisheries managers is now available. Contributions from around the world. Carefully edited by internationally respected editor. Has been generated from acclaimed HIFI Symposium.
Download or read book Fish Population Dynamics Monitoring and Management written by Ichiro Aoki and published by Springer. This book was released on 2018-05-22 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores how we can solve the urgent problem of optimizing the use of variable, uncertain but finite fisheries resources while maintaining sustainability from a marine-ecosystem conservation perspective. It offers readers a broad understanding of the current methods and theory for sustainable exploitation of fisheries resources, and introduces recent findings and technological developments. The book is divided into three parts: Part I discusses fish stock dynamics, and illustrates how ecological processes affecting life cycles and biological interactions in marine environments lead to fish stock variability in space and time in major fish groups; small pelagic fish, demersal fish and large predatory fish. These insights shed light on the mechanisms underlying the variability in fish stocks and form the essential biological basis for fisheries management. Part II addresses the technologies and systems that monitor changes in fisheries resources and marine ecosystems using two approaches: fishery-dependent and fishery-independent data. It also describes acoustic surveys and biological sampling, as well as stock assessment methods. Part III examines management models for effectively assessing the natural variability in fisheries resources. The authors explore ways of determining the allowable catch in response to changes in stock abundance and how to incorporate ecological processes and monitoring procedures into management models. This book offers readers a broad understanding of sustainable exploitation as well as insights into fisheries management for the next generation.
Download or read book Developmental Biology of Teleost Fishes written by Yvette Kunz-Ramsay and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the compiling of this book, the vast literature dealing with the descriptive morphology, histology and cytology of teleost development has been combed and integrated. The book is divided into 21 chapters, starting with the egg and embryonic development up to hatching. This is followed by a description of ectodermal, mesodermal and entodermal derivatives and the development of various organs. The subject index, species index and the abundant illustrations add extra value to this long awaited book. Developmental Biology of Teleost Fishes will be a valuable tool for scientists and students in the fields of biology, developmental biology, molecular biology and fish biology.
Download or read book Fishery Science written by Lee A. Fuiman and published by John Wiley & Sons. This book was released on 2009-02-12 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now clear that data based on the studies of fish eggs and larvae make a number of unique contributions to fishery science that are crucial for accurate assessment and management of fish populations, including those of commercially important fisheries. This valuable book demonstrates why fish eggs and larvae are important, how the characteristics of early life stages require a somewhat different research approach and how information on early life stages can be applied and interpreted to yield unique insights into fish populations. The editors of Fishery Science have drawn together an extremely useful and well-written book with contributions from internationally respected researchers from North America, Asia and Europe. Chapters include a discussion of the unique nature of early life stages, age and growth, mortality, recruitment, populations analysis, habitats, human impacts and management. A carefully selected set of case studies demonstrates several specific applications of early life history information to a number of fishery problems. Fishery Science was designed to complement existing textbooks and is an essential purchase for all fisheries students and professionals, and for biologists working on the early life stages of fish. This exciting book is also of great value to ecologists, marine, freshwater and environmental scientists, populations biologists and oceanographers. All libraries in universities and research establishments where biological and fishery science are studied and taught should have copies of this book available on their shelves.
Download or read book Early Life History and Recruitment in Fish Populations written by R.C. Chambers and published by Springer Science & Business Media. This book was released on 1997-07-31 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many of the processes influencing recruitment to an adult fish population or entry into a fishery occur very early in life. The variations in life histories and behaviours of young fish and the selective processes operating on this variation ultimately determine the identities and abundance of survivors. This important volume brings together contributions from many of the world's leading researchers from the field of fish ecology. The book focuses on three major themes of pressing importance in the analysis of the role that the early life history of fishes plays in the number and quality of recruits: the selective processes at play in their early life history; the contributions of early life history to the understanding of recruitment.
Download or read book POLAR NIGHT Marine Ecology written by Jørgen Berge and published by Springer Nature. This book was released on 2020-04-08 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until recently, the prevailing view of marine life at high latitudes has been that organisms enter a general resting state during the dark Polar Night and that the system only awakens with the return of the sun. Recent research, however, with coordinated, multidisciplinary field campaigns based on the high Arctic Archipelago of Svalbard, have provided a radical new perspective. Instead of a system in dormancy, a new perspective of a system in full operation and with high levels of activity across all major phyla is emerging. Examples of such activities and processes include: Active marine organisms at sea surface, water column and the sea-floor. At surface we find active foraging in seabirds and fish, in the water column we find a high biodiversity and activity of zooplankton and larvae such as active light induced synchronized diurnal vertical migration, and at seafloor there is a high biodiversity in benthic animals and macroalgae. The Polar Night is a period for reproduction in many benthic and pelagic taxa, mass occurrence of ghost shrimps (Caprellides), high abundance of Ctenophores, physiological evidence of micro- and macroalgal cells that are ready to utilize the first rays of light when they appear, deep water fishes found at water surface in the Polar night, and continuous growth of bivalves throughout the winter. These findings not only begin to shape a new paradigm for marine winter ecology in the high Arctic, but also provide conclusive evidence for a top-down controlled system in which primary production levels are close to zero. In an era of environmental change that is accelerated at high latitudes, we believe that this new insight is likely to strongly impact how the scientific community views the high latitude marine ecosystem. Despite the overwhelming darkness, the main environmental variable affecting marine organisms in the Polar Night is in fact light. The light regime during the Polar Night is unique with respect to light intensity, spectral composition of light and photoperiod.
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:
Download or read book Draft Additional Water Acquisition for Meeting VAMP Flow Objectives 1999 written by and published by . This book was released on 1999 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
