Download or read book Allometric and Ecological Determinants of Territory Size in Juvenile Atlantic Salmon Salmo Salar written by Ernest Robert Keeley and published by . This book was released on 1993 with total page 0 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 1995 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2012 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Production of Juvenile Atlantic Salmon Salmo Salar in Natural Waters written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date information, knowledge and research in progress in scientific fields related to natural production of juvenile Atlantic salmon and some other ecologically similar fluvial salmonids is contained in the 25 papers and 12 abstracts contained in this publication, which were prepared for an international symposium held in St. John's, Newfoundland. Studies relate to stream ecology, invertebrates and predators, habitat improvement, competitive effects, behaviour and dispersal, habitat and production of juvenile salmon, population dynamics and relationships of juvenile salmon estimates to smolt yields. A list of participants at the conference is also provided.
Download or read book Masters Abstracts International written by and published by . This book was released on 1994 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Allometry of Territory Size and Metabolic Rate as Predictors of Self thinning in Young of the year Atlantic Salmon Salmo Salar written by Stefán Óli Steingrímsson and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-thinning is a progressive decline in population density caused by competitively induced losses in a cohort of growing individuals and is frequently depicted as: $\log\sb?$ (density) = $\rm c -\beta\log\sb?$ (body mass). In mobile animals, two self-thinning mechanisms have been proposed. The territory-size hypothesis predicts that maximum population density for a given body size is set by the allometry of territory size. The energetic equivalence hypothesis suggests that if there is a constant amount of energy flowing through a population, the self-thinning slope is set by the allometry of metabolic rate. I tested the predictions of both hypotheses by monitoring body size, food availability, habitat features and population density for young-of-the-year Atlantic salmon (Salmo salar) in Catamaran Brook, New Brunswick, throughout their first growing season. In general, the results were consistent with the predictions of the territory-size hypothesis since the observed densities were high enough to expect competition for space while they did not exceed the maximum densities predicted. Moreover, the observed self-thinning slope of $-$1.16 was consistent with the slope predicted by the allometry of territory size established specifically for the population under study. The overall slope, however, was steeper than predicted by the allometry of metabolic rate, most likely because of a gradual decline in food abundance over the study period. The results suggest that territoriality may play a role as a mechanism of self-thinning in populations of indeterminate growers competing for food and space.
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 Animal Behavior written by Ken Yasukawa and published by Bloomsbury Publishing USA. This book was released on 2014-01-22 with total page 1251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover why animals do what they do, based on their genes, physiologies, cultures, traditions, survival and mating advantages, and evolutionary histories—and find out how studying behavior in the animal world helps us understand human behavior. The three volumes of Animal Behavior: How and Why Animals Do the Things They Do cover the breadth of the field, addressing causation, development, function, and evolution in a wide range of animals, from invertebrates to humans. Inspired by Nobel laureate Nikolaas Tinbergen's work, the first two volumes follow Tinbergen's four classic questions of animal behavior, while the third volume supplies integrated examples of Tinbergen's investigative process applied in specific cases. Written in an engaging, accessible manner ideal for college students as well as general audiences, this evidence-based collection provides a fascinating tour of animal behaviorists' findings, such as how animal communication can be truthful or deceitful, the deadly serious business behind clashes in the "battle of the sexes," and how documentation of animal behavior can lead to a deeper understanding of human behavior. Each chapter provides both historical background and information about current developments in animal behavior knowledge.
Download or read book Behavioural and Ecological Implications of Predation Risk in Juvenile Atlantic Salmon Salmo Salar written by Jae-Woo Kim and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the wealth of laboratory studies, the effects of local predation risk on the behaviour and ecology of a prey species under natural conditions have rarely been examined. In Chapter 1, I tested the hypothesis that juvenile Atlantic salmon (Salmo salar) use both chemical and visual information to assess predation risk under natural conditions. Both young-of-the-year (YOY) and parr salmon exhibited antipredator responses when exposed to a chemical alarm cue and exposure to alarm cues influenced their response to a visual threat. While YOY and parr differed in the type and intensity of antipredator responses, both chemical and visual cues are used in an additive manner. In Chapter 2, I tested the prediction that YOY use chemical alarm cues to assess the predation risk of alternative habitats and decide where to settle over a two-week period following emergence. In seven similar reaches of Catamaran Brook, New Brunswick, I established three contiguous sections where I manipulated the perceived predation risk by releasing alarm cues versus a stream water control. The density of YOY decreased in risky sections and increased in control and untreated buffer sections, whereas the density of parr was not affected. Clearly, YOY salmon can assess and select habitats based on the perceived level of predation risk. If one assumes that predation risk is a cost, optimality models predict that territory size will decrease with increasing predation risk. In Chapter 3, I examined whether both acute and chronic predation risk influences the territorial behaviour of YOY. When exposed to a single dose of chemical alarm cue, YOY salmon decreased the number of switches between foraging stations, but did not change their territory size or foraging rate. When exposed to chemical alarm cue over a two week period, YOY salmon reduced the size of their territories, but did not change their foraging rate or number of switches. Clearly, YOY adjusted their territorial behaviour in response to both acute and chronic increases in perceived predation risk, but in different ways. Together, my results suggest that predation risk influences not only short-term (immediate) anti-predator behaviour, but is also an important component of habitat selection and shapes territorial behaviour over longer periods.
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2003 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Stock Recruitment and Reference Points written by Etienne Prévost and published by Editions Quae. This book was released on 2001 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects the available knowledge about the ecology of Atlantic salmon and contemporary stock assessment methods supporting the specific task of establishing reference points. Bayesian approaches for incorporating uncertainty are front and centre in the book. Stock and recruitment analysis methods, transport of reference points, risk analysis and use of index measures of abundance are presented in a format which can be readily understood and applied by scientists, educators, professionals and undergraduate students.
Download or read book The Allometry of Territory Size and Metabolic Rate as Predictors of Self thinning in Young of the year Atlantic Salmon Salmo Salar written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Proceedings of the International Workshop Entitled Integrating Across Scales Predicting Patterns of Change in Atlantic Salmon written by Martha Ellen Mather and published by . This book was released on 1998 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology Abstracts written by and published by . This book was released on 1996 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Download or read book Foraging and Territorial Decisions by Juvenile Atlantic Salmon Salmo Salar Under Chronic Predation Threat in the Wild written by Patrick H. Malka and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Territoriality and Population Regulation in Juvenile Salmonids written by István Imre and published by . This book was released on 2003 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
