Download or read book Variation in Freshwater Growth and Development Among Five New England Atlantic Salmon Salmo Salar Populations Reared in a Common Environment written by Mariska Obedzinski and published by . This book was released on 2003 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Salmon Ecology written by Øystein Aas and published by John Wiley & Sons. This book was released on 2011-07-05 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic salmon is one of the most prized and exploited species worldwide, being at the centre of a massive sports fishing industry and increasingly as the major farmed species in many countries worldwide. Atlantic Salmon Ecology is a landmark publication, both scientifically important and visually attractive. Comprehensively covering all major aspects of the relationship of the Atlantic salmon with its environment, chapters include details of migration and dispersal, reproduction, habitat requirements, feeding, growth rates, competition, predation, parasitsm, population dynamics, effects of landscape use, hydro power development, climate change, and exploitation. The book closes with a summary and look at possible future research directions. Backed by the Norwegian Research Council and with editors and contributors widely known and respected, Atlantic Salmon Ecology is an essential purchase for all those working with this species, including fisheries scientists and managers, fish biologists, ecologists, physiologists, environmental biologists and aquatic scientists, fish and wildlife department personnel and regulatory bodies. Libraries in all universities and research establishments where these subjects are studied and taught should have copies of this important publication. Comprehensive and up-to-date coverage of Atlantic Salmon Atlantic Salmon is one of the world's most commercially important species Backed by the Norwegian Research Council Experienced editor and internationally respected contributors
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.
Download or read book Conservation Biology written by Scott P. Carroll and published by Oxford University Press. This book was released on 2008-09-15 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this book is to encourage and formalize the infusion of evolutionary thinking into mainstream conservation biology. It reviews the evolutionary foundations of conservation issues, and unifies conceptual and empirical advances in evolutionary conservation biology. The book can be used either as a primary textbook or as a supplementary reading in an advanced undergraduate or graduate level course - likely to be called Conservation Biology or in some cases Evolutionary Ecology. The focus of chapters is on current concepts in evolution as they pertain to conservation, and the empirical study of these concepts. The balanced treatment avoids exhaustive reviews and overlapping duplication among the chapters. Little background in genetics is assumed of the reader.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2014 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Challenges for Diadromous Fishes in a Dynamic Global Environment written by Alex Haro and published by . This book was released on 2009 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponsored by the Northeastern Division, American Fisheries Society.
Download or read book Age Growth and Mortality of Juvenile Atlantic Salmon in Streams written by Patrick W. Bley and published by . This book was released on 1987 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Suitability Index Models written by Jon G. Stanley and published by . This book was released on 1995 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model was developed by evaluating individual suitability indices of 17 environmental variables that have been shown to afffect productivity or survival of nonmigratory freshwater life history stages of Atlantic salmon (Salmo salar L.).
Download or read book Mortality and Development of Wild Atlantic Salmon Salmo Salar Embryos Associated with Environmental Conditions Over Winter in the Miramichi River Basin written by Jacqueline Michelle Lavery and published by . This book was released on 2017 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic winter conditions in northern streams present considerable challenges for incubating wild Atlantic salmon (Salmo salar) embryos. How these winter conditions affect embryo mortality and development in nature is poorly understood. The goals of the present study were to 1) identify abiotic variables associated with the mortality of wild salmon embryos and 2) assess the accuracy and precision of embryonic developmental prediction methods currently used for conservation and basic research purposes. Over two study years (2013-2014 and 2014-2015), embryos were reared in artificial redds in five active spawning reaches in the Miramichi River basin and mortality was quantified at two sampling events (late March, pre-freshet and late May, post-freshet). Through partial least squares regression analyses, 37.6% of the total variation in embryo mortality was explained by abiotic predictor variables from five continuous measurements of incubation conditions in each reach (water temperature, water level, dissolved oxygen, ice conditions, and substrate characteristics). Each of the five groups of predictor variables contributed uniformly to the explained variation, which suggests that mortality is influenced by multiple interacting abiotic conditions, rather than a single variable. Developmental states based on external morphology were assigned to live embryos and alevins at various points through the incubation periods. Corresponding temperature records were used to calculate predicted developmental progression using three temperature-based relative age methods (cumulative degree-days, effective degree-days, and tau somites). Embryonic development was not observed to match any of the prediction methods. However, a linear model fitting effective degree-days to assigned developmental state was suggested as a first step to improve predictions. Population-specific adjustments to parameters within the effective degree-day or tau somite methods and the inclusion of other abiotic variables are recommended. Results from the present study support a multi-faceted ecological perspective of embryonic mortality and development in nature and may provide a baseline from which to measure the impacts of further environmental change.
Download or read book Evolutionary Biology of the Atlantic Salmon written by Tomislav Vladić and published by CRC Press. This book was released on 2015-08-10 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlantic salmon (Salmo salar, L) is an anadromous species contributing to major fishery catches and comprising a significant part of the aquaculturally produced fish for human consumption. The aim of this book is to incite the interest in the field of knowledge gathered from a broad scope of disciplines that have investigated this fish species. Und
Download or read book Estimated Genetic Parameters of Freshwater and Seawater Measures of Growth and Development in Cultured Atlantic Salmon Salmo Salar written by Fiona Marcella O'Flynn and published by . This book was released on 1990 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Atlantic Salmon written by Eric Verspoor and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlantic Salmon is a cultural icon throughout its North Atlantic range; it is the focus of probably the World’s highest profile recreational fishery and is the basis for one of the World’s largest aquaculture industries. Despite this, many wild stocks of salmon are in decline and underpinning this is a dearth of information on the nature and extent of population structuring and adaptive population differentiation, and its implications for species conservation. This important new book will go a long way to rectify this situation by providing a thorough review of the genetics of Atlantic salmon. Sponsored by the European Union and the Atlantic Salmon Trust, this book comprises the work of an international team of scientists, carefully integrated and edited to provide a landmark book of vital interest to all those working with Atlantic salmon.
Download or read book Water Quality Requirements for Atlantic Salmon written by Joseph N. DeCola and published by . This book was released on 1970 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Salmon Ecology written by Øystein Aas and published by John Wiley & Sons. This book was released on 2010-10-18 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic salmon is one of the most prized and exploited species worldwide, being at the centre of a massive sports fishing industry and increasingly as the major farmed species in many countries worldwide. Atlantic Salmon Ecology is a landmark publication, both scientifically important and visually attractive. Comprehensively covering all major aspects of the relationship of the Atlantic salmon with its environment, chapters include details of migration and dispersal, reproduction, habitat requirements, feeding, growth rates, competition, predation, parasitsm, population dynamics, effects of landscape use, hydro power development, climate change, and exploitation. The book closes with a summary and look at possible future research directions. Backed by the Norwegian Research Council and with editors and contributors widely known and respected, Atlantic Salmon Ecology is an essential purchase for all those working with this species, including fisheries scientists and managers, fish biologists, ecologists, physiologists, environmental biologists and aquatic scientists, fish and wildlife department personnel and regulatory bodies. Libraries in all universities and research establishments where these subjects are studied and taught should have copies of this important publication. Comprehensive and up-to-date coverage of Atlantic Salmon Atlantic Salmon is one of the world's most commercially important species Backed by the Norwegian Research Council Experienced editor and internationally respected contributors
Download or read book Environmental and Genetic Sources of Geographic Variation in Populations of Atlantic Salmon Salmo Salar Linnaeus written by Brian Everett Riddell and published by . This book was released on 1979 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth of Atlantic Salmon Salmo Salar in Freshwater written by Douglas B. Sigourney and published by . This book was released on 2010 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Structural Complexity on Phenotypic Development and Post release Performance of Juvenile Atlantic Salmon Salmo Salar written by John James Winkowski and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The environment can play an integral role on phenotypic development of an organism. In this thesis, I experimentally tested the influence of structural complexity on phenotypic development and post-release performance of juvenile Atlantic salmon (Salmo salar) when released into semi-natural and natural environments. From an applied perspective, I was interested in investigating alternative rearing strategies of juvenile Salmo salar with the goal of enhancing performance of fish when released into nature. In my first data chapter, I conducted an experiment to test the influence of environmental enrichment during incubation (i.e. addition of gravel to create a "complex" environment) on the phenotype and performance of juvenile salmon in a semi-natural environment. At the culmination of endogenous feeding (i.e. "emergence"), fish that incubated in a complex environment were heavier, in better body condition, fed more on novel prey, and took longer to reappear from a shelter after a simulated predator attack. In addition, when transferred from incubation environments to semi-natural stream channels, fish originating from the complex incubation environment expressed enhanced growth and survival. These findings suggest that Salmo salar are plastic to environmental factors during incubation and developmental differences could be contributing to performance in semi-natural stream channels. There were, however, no commensurate differences in brain volume with those observed in behaviour and performance, which may suggest that other developmental processes in the brain of juvenile Atlantic salmon are occurring that are not reflected in overall brain volume. In my second data chapter, I reared the fish from the preceding incubation study for 60 days after emergence in tanks with ("complex") or without cobble substrate ("simple"). I used a reciprocal approach to rearing and moved fish between complex and simple environments for two 30-day rearing periods to investigate if timing or duration of timing of exposure to habitat complexity influenced growth and condition in the hatchery and subsequent survival in semi-natural and wild environments. I found that fish reared in complex tanks exhibited higher body condition (i.e. heavier for a given length) for the first 30 days, however, differences generally faded during the second 30 days of hatchery rearing. Additionally, I observed rearing groups with smaller fish, on average, at release expressed higher growth rates in semi-natural stream channels and in the wild, such that sizes and conditions did not differ among groups at final recapture. Estimated survival after release into the wild (over ca. 260 days) was higher for fish incubated in a complex environment and reared in a simple environment for consecutive 30 d rearing periods (Complex>Simple>Simple, or "CSS") and those in SCC treatment than fish from 3 of the 7 other groups (CCC, CSC, SSC). There were no other differences in survival between treatment groups. Survival in the semi-natural stream channels was high (> 85%) and I did not detect differences between groups. The results presented in this thesis suggest that phenotypic traits of juvenile Atlantic salmon are sensitive to environmental factors early in development. Enriched environments containing gravel and cobble may serve to provide cover for juvenile fish during early life, allowing them to rest, hide from predators, metabolize, and allocate energy towards somatic growth and development. Such enrichment can provide fish an advantage when released into the wild, though effects may be complicated. As a rearing strategy for the release of salmon into nature to re-establish depleted populations, modifications are likely needed to simplify maintenance of rearing tanks, however this study serves as a benchmark for future efforts at alternative rearing techniques for enhancing performance of released juvenile Salmo salar in nature.
