Steelhead Abundance in Seasonally Closed Estuaries Estimated Using Mark Recapture Methods

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ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (986 download)

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Book Synopsis Steelhead Abundance in Seasonally Closed Estuaries Estimated Using Mark Recapture Methods by : Danielle M. Frechette

Download or read book Steelhead Abundance in Seasonally Closed Estuaries Estimated Using Mark Recapture Methods written by Danielle M. Frechette and published by . This book was released on 2016 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonally-closed estuaries in central California are important rearing habitat for populations of steelhead (Oncorhynchus mykiss). During periods of estuary closure, juvenile steelhead recruit to the resulting freshwater lagoons, where they may benefit from enhanced growth conditions afforded by inputs of marine nutrients and subsequent increased marine survival, but also face high predation pressure. Accurate estimation of the number of steelhead rearing in lagoon habitat is, therefore, essential for effective management. We implemented a monthly mark-recapture sampling protocol to estimate abundance of steelhead in the Scott Creek lagoon (Santa Cruz County, California) during three years that experienced different patterns of sandbar closure. Specifically, we conducted paired sampling events in which a marking event and a recapture event were conducted each month during the period of sandbar closure. We used recaptures of steelhead individually marked with passive integrated transponders (PIT tags) to assess performance of three methods of abundance estimation; two methods assuming an open population and one assuming a closed population. Monthly estimates of abundance generated using the open population methods were similar to the closed-population method when recapture rates were ≥10% and the assumption of closure was met. By incorporating each encounter with an individually marked steelhead to inform the estimates of lagoon abundance, the open population methods increased the number of recaptured steelhead in the sampled population, thereby increasing the precision of our abundance estimates relative to the closed-population method. Thus, the open population methods allowed us to more precisely estimate the lagoon population during months when recaptures were very low (0-4%) or the closure assumption was not met. Further, our paired, two-day mark-recapture sampling program provided a consistent sampling routine that could be applied across years with different lagoon closure and population closure dynamics, while minimizing sampling effort and disturbance to the lagoon. Our methods may be broadly applied to bar-built estuary systems throughout central California and will offer valuable insights into ecology and population biology of Central Coast steelhead, which can be applied directly to management of this threatened Distinct Population Segment. [doi:10.7289/V5/TM-SWFSC-555 (http://dx.doi.org/10.7289/V5/TM-SWFSC-555)]

California Fish and Game

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ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (312 download)

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Book Synopsis California Fish and Game by :

Download or read book California Fish and Game written by and published by . This book was released on 2015 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Temporarily Open/closed Estuaries in South Africa

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ISBN 13 : 9781616684129
Total Pages : 0 pages
Book Rating : 4.6/5 (841 download)

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Book Synopsis Temporarily Open/closed Estuaries in South Africa by : R. Perissinotto

Download or read book Temporarily Open/closed Estuaries in South Africa written by R. Perissinotto and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: South African temporarily open/closed estuaries (TOCEs) and similar systems along the coastlines of other regions of the world, especially Australia, are amongst the most productive aquatic ecosystems. They shift seasonally from mostly open mouth states during rainy seasons to mostly closed mouth states during the dry part of the year. This allows a whole range of juvenile forms of estuarine-dependent and estuarine-associated marine species to be recruited inside their sheltered and productive reaches, where they complete their growth to maturity. This book covers topics such as the structure and function of open/closed estuaries in South Africa, as well as outlining the future management decisions that need to be made in order to ensure the longevity of these productive ecosystems.

Stanislaus River, California

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ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (327 download)

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Book Synopsis Stanislaus River, California by : United States. War Department

Download or read book Stanislaus River, California written by United States. War Department and published by . This book was released on 1892 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Government Reports Announcements & Index

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ISBN 13 :
Total Pages : 828 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Government Reports Announcements & Index by :

Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1977 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Estimation of Animal Abundance and Related Parameters

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ISBN 13 : 9781930665552
Total Pages : 0 pages
Book Rating : 4.6/5 (655 download)

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Book Synopsis The Estimation of Animal Abundance and Related Parameters by : George Arthur Frederick Seber

Download or read book The Estimation of Animal Abundance and Related Parameters written by George Arthur Frederick Seber and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Originally published in 1982, this reprint of the second edition of The Estimation of Animal Abundance and Related Parameters has been described as the "bible" of the field. Censuses of living populations are required for many purposes in wildlife management, fisheries and pest control and they are essential in policy making for the protection of the environment. In this book Professor Seber, one of the leading experts in the field, explains in detail the methods that have been developed by ecologists for estimating animal numbers and related parameters such as mortality and birth rates. He insists on the importance of experimental design and describes a great variety of statistical techniques that are required in analyzing the data obtained. These designs and techniques are classified for easy reference according to the particular types of problems encountered by the field worker and the kind of information that is available. The assumptions underlying practical methods in current use are fully examined, together with procedures for testing their validity. Each method is demonstrated by at least one worked example; in all there are over 90 such examples, mostly using data obtained from natural or free-ranging populations around the world. Ecologists will find this book - the first full-length treatment of its subject - a sound statistical assessment of methods which in the past were frequently developed on an intuitive basis; while applied mathematicians will benefit no less from a study of the interaction between mathematics and biology in this important branch of statistics. Field workers will be stimulated and helped by the real-life examples and the practical nature of the work. "George Seber's book became an instant classic following its publication in 1973. It dealt comprehensively with previously published research on methods for estimating abundance and demographic parameters of animal populations. Professor Seber provided detailed reviews of methods that were originally published with adequate statistical development, and he provided derivations and development for intuitive estimators that had been initially presented by ecologists. The second edition of the book was published in 1982 and included substantive additional coverage of "new" developments that had occurred since 1973. The 1982 book has become a citation classic and can be found on the bookshelf of every serious animal population ecologist and every biostatistician dealing with animal population data. For the 20 years since its publication, it has remained the only book of its kind. Many important methodological developments have occurred in animal estimation problems since 1982, but virtually all such methods represent extensions of the initial methods described by Seber (1982). Several excellent monographs and books have been written over the last 2 decades that deal in detail with particular subsets of the material in Seber (1982). What is remarkable is that these recent contributions have not superseded Seber's book, but are best viewed as supplements to his original comprehensive treatment. Thus, Seber's (1982) book can still be found on the bookshelf of every serious animal population ecologist and biostatistician. Now, in 2002, it is surrounded on the bookshelf by a handful of related books and monographs, but it has not lost its relevance or importance and remains the most detailed, comprehensive treatment of methods to estimate animal abundance and related parameters." Jim Nichols, Patuxent Wildlife Research Center, U.S. Geological Survey, Laurel, MD Professor Seber, Professor Emeritus at the University of Auckland, is regarded as the world's foremost authority on statistical methods for estimating the size of animal populations. His early work on capture-recapture methods was groundbreaking and the Jolly-Seber method still forms the basis of most modern work, more than 30 years after his first paper on the method in 1962.

Recovery Plan for the Sacramento/San Joaquin Delta Native Fishes

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Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Recovery Plan for the Sacramento/San Joaquin Delta Native Fishes by :

Download or read book Recovery Plan for the Sacramento/San Joaquin Delta Native Fishes written by and published by . This book was released on 1996 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monitoring Vertebrate Populations

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Publisher : Elsevier
ISBN 13 : 0080536948
Total Pages : 383 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Monitoring Vertebrate Populations by : William L. Thompson

Download or read book Monitoring Vertebrate Populations written by William L. Thompson and published by Elsevier. This book was released on 1998-08-17 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written to serve as a general reference for biologists and resource managers with relatively little statistical training. It focuses on both basic concepts and practical applications to provide professionals with the tools needed to assess monitoring methods that can detect trends in populations. It combines classical finite population sampling designs with population enumeration procedures in a unified approach for obtaining abundance estimates for species of interest. The statistical information is presented in practical, easy-to-understand terminology. Presented in practical, easy-to-understand terminology Serves as a general reference for biologists and resource managers Provides the tools needed to detect trends in populations Introduces a unified approach for obtaining abundance estimates

Ecology of Atlantic Salmon and Brown Trout

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Publisher : Springer Science & Business Media
ISBN 13 : 9400711891
Total Pages : 720 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Ecology of Atlantic Salmon and Brown Trout by : Bror Jonsson

Download or read book Ecology of Atlantic Salmon and Brown Trout written by Bror Jonsson and published by Springer Science & Business Media. This book was released on 2011-05-03 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Destruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North America and Europe, brown trout in Europe, Northern Africa and Western Asia. The species live in small streams as well as large rivers, lakes, estuaries, coastal seas and oceans, with brown trout better adapted to small streams and less well adapted to feeding in the ocean than Atlantic salmon. Smolt and adult sizes and longevity are constrained by habitat conditions of populations spawning in small streams. Feeding, wintering and spawning opportunities influence migratory versus resident lifestyles, while the growth rate influences egg size and number, age at maturity, reproductive success and longevity. Further, early experiences influence later performance. For instance, juvenile behaviour influences adult homing, competition for spawning habitat, partner finding and predator avoidance. The abundance of wild Atlantic salmon populations has declined in recent years; climate change and escaped farmed salmon are major threats. The climate influences through changes in temperature and flow, while escaped farmed salmon do so through ecological competition, interbreeding and the spreading of contagious diseases. The authors pinpoint essential problems and offer suggestions as to how they can be reduced. In this context, population enhancement, habitat restoration and management are also discussed. The text closes with a presentation of what the authors view as major scientific challenges in ecological research on these species.

Goodness-of-Fit Tests and Model Validity

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Publisher : Springer Science & Business Media
ISBN 13 : 1461201039
Total Pages : 512 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Goodness-of-Fit Tests and Model Validity by : C. Huber-Carol

Download or read book Goodness-of-Fit Tests and Model Validity written by C. Huber-Carol and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 37 expository articles in this volume provide broad coverage of important topics relating to the theory, methods, and applications of goodness-of-fit tests and model validity. The book is divided into eight parts, each of which presents topics written by expert researchers in their areas. Key features include: * state-of-the-art exposition of modern model validity methods, graphical techniques, and computer-intensive methods * systematic presentation with sufficient history and coverage of the fundamentals of the subject * exposure to recent research and a variety of open problems * many interesting real life examples for practitioners * extensive bibliography, with special emphasis on recent literature * subject index This comprehensive reference work will serve the statistical and applied mathematics communities as well as practitioners in the field.

Current References in Fish Research

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Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Current References in Fish Research by :

Download or read book Current References in Fish Research written by and published by . This book was released on 1997 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Upstream

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Publisher : National Academies Press
ISBN 13 : 0309176204
Total Pages : 472 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Upstream by : National Research Council

Download or read book Upstream written by National Research Council and published by National Academies Press. This book was released on 1996-07-17 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of salmon to the Pacific Northwestâ€"economic, recreational, symbolicâ€"is enormous. Generations ago, salmon were abundant from central California through Idaho, Oregon, and Washington to British Columbia and Alaska. Now they have disappeared from about 40 percent of their historical range. The decline in salmon numbers has been lamented for at least 100 years, but the issue has become more widespread and acute recently. The Endangered Species Act has been invoked, federal laws have been passed, and lawsuits have been filed. More than $1 billion has been spent to improve salmon runsâ€"and still the populations decline. In this new volume a committee with diverse expertise explores the complications and conflicts surrounding the salmon problemâ€"starting with available data on the status of salmon populations and an illustrative case study from Washington state's Willapa Bay. The book offers specific recommendations for salmon rehabilitation that take into account the key role played by genetic variability in salmon survival and the urgent need for habitat protection and management of fishing. The committee presents a comprehensive discussion of the salmon problem, with a wealth of informative graphs and charts and the right amount of historical perspective to clarify today's issues, including: Salmon biology and geographyâ€"their life's journey from fresh waters to the sea and back again to spawn, and their interaction with ecosystems along the way. The impacts of human activitiesâ€"grazing, damming, timber, agriculture, and population and economic growth. Included is a case study of Washington state's Elwha River dam removal project. Values, attitudes, and the conflicting desires for short-term economic gain and long-term environmental health. The committee traces the roots of the salmon problem to the extractive philosophy characterizing management of land and water in the West. The impact of hatcheries, which were introduced to build fish stocks but which have actually harmed the genetic variability that wild stocks need to survive. This book offers something for everyone with an interest in the salmon issueâ€"policymakers and regulators in the United States and Canada; environmental scientists; environmental advocates; natural resource managers; commercial, tribal, and recreational fishers; and concerned residents of the Pacific Northwest.

The Striped Bass

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Publisher : Lyons Press
ISBN 13 :
Total Pages : 504 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis The Striped Bass by : Nick Karas

Download or read book The Striped Bass written by Nick Karas and published by Lyons Press. This book was released on 1993 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fullest, most authoritative and helpful book ever written on the species. It is an essential source of useful information for every striped bass enthusiast.

Aquatic Sciences and Fisheries Abstracts

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ISBN 13 :
Total Pages : 1008 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Aquatic Sciences and Fisheries Abstracts by :

Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1995 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Behavior and Ecology of Pacific Salmon and Trout

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Publisher : UBC Press
ISBN 13 : 0774842431
Total Pages : 392 pages
Book Rating : 4.7/5 (748 download)

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Book Synopsis The Behavior and Ecology of Pacific Salmon and Trout by : Thomas P. Quinn

Download or read book The Behavior and Ecology of Pacific Salmon and Trout written by Thomas P. Quinn and published by UBC Press. This book was released on 2011-11-01 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Behavior and Ecology of Pacific Salmon and Trout explains the patterns of mate choice, the competition for nest sites, and the fate of the salmon after their death. It describes the lives of offspring during the months they spend incubating in gravel, growing in fresh water, and migrating out to sea to mature. This thorough, up-to-date survey should be on the shelf of everyone with a professional or personal interest in Pacific salmon and trout. Written in a technically accurate but engaging style, it will appeal to a wide range of readers, including students, anglers, biologists, conservationists, legislators, and armchair naturalists.

Mechanisms of Migration in Fishes

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Publisher : Springer Science & Business Media
ISBN 13 : 1461327636
Total Pages : 567 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Mechanisms of Migration in Fishes by : James D. McCleave

Download or read book Mechanisms of Migration in Fishes written by James D. McCleave and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last major synthesis of our knowledge of fish migration and the underlying transport and guidance phenomena, both physical and biological, was "Fish Migration" published 16 years ago by F.R. Harden Jones (1968). That synthesis was based largely upon what could be gleaned by classical fishery-biology techni.ques, such as tagging and recapture studies, commercial fishing statistics, and netting and trapping studies. Despite the fact that Harden Jones also provided, with a good deal of thought and speculation, a theoretical basis for studying the various aspects of fish migration and migratory orientation, progress in this field has been, with a few excepti.ons, piecemeal and more disjointed than might have been expected. Thus we welcomed the approach from the NATO Marine Sciences Programme Panel and the encouragement from F.R. Harden Jones to develop a proprosal for, and ultimately to organize, a NATO Advanced Research Institute (ARI) on mechanisms of fish migration. Substantial progress had been made with descriptive, analytical and predictive approaches to fish migration since the appearance of "Fish ~ligration." Both because of the progress and the often conflicting results of research, we felt that the time was again right and the effort justified to synthesize and to critically assess our knowledge. Our ultimate aim was to identify the gains and shortcomings and to develop testable hypotheses for the next decade or two.

Bayesian Models

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Publisher : Princeton University Press
ISBN 13 : 1400866553
Total Pages : 315 pages
Book Rating : 4.4/5 (8 download)

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Book Synopsis Bayesian Models by : N. Thompson Hobbs

Download or read book Bayesian Models written by N. Thompson Hobbs and published by Princeton University Press. This book was released on 2015-08-04 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bayesian modeling has become an indispensable tool for ecological research because it is uniquely suited to deal with complexity in a statistically coherent way. This textbook provides a comprehensive and accessible introduction to the latest Bayesian methods—in language ecologists can understand. Unlike other books on the subject, this one emphasizes the principles behind the computations, giving ecologists a big-picture understanding of how to implement this powerful statistical approach. Bayesian Models is an essential primer for non-statisticians. It begins with a definition of probability and develops a step-by-step sequence of connected ideas, including basic distribution theory, network diagrams, hierarchical models, Markov chain Monte Carlo, and inference from single and multiple models. This unique book places less emphasis on computer coding, favoring instead a concise presentation of the mathematical statistics needed to understand how and why Bayesian analysis works. It also explains how to write out properly formulated hierarchical Bayesian models and use them in computing, research papers, and proposals. This primer enables ecologists to understand the statistical principles behind Bayesian modeling and apply them to research, teaching, policy, and management. Presents the mathematical and statistical foundations of Bayesian modeling in language accessible to non-statisticians Covers basic distribution theory, network diagrams, hierarchical models, Markov chain Monte Carlo, and more Deemphasizes computer coding in favor of basic principles Explains how to write out properly factored statistical expressions representing Bayesian models