Download or read book Diversity in Migration Habitat Use and Growth of Dolly Varden Char in Chignik Lakes Alaska written by Morgan Howard Bond and published by . This book was released on 2013 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dolly Varden (Salvelinus malma) are a facultatively anadromous salmonid common around much of the north Pacific Rim, but little is known of the factors that determine their migration and life-history patterns. In the Chignik Lakes system on the Alaska Peninsula, Dolly Varden are the only large bodied resident fish species and use nearly all available aquatic habitats at different life stages. In addition, they are often the numerical dominant fish in both freshwater and estuarine habitats. I employed a multifaceted approach to understand variation in Dolly Varden migration timing, growth, habitat use, and variation in anadromy. By integrating daily counts of Dolly Varden ascending rivers and streams throughout the migratory range over a wide temporal scale, I determined upstream migration generally occurs earlier in southern stream and later in northern streams. Interannual variation in ascent timing in southern streams is correlated with sea-surface temperatures, while in northern streams it was not. Plasma insulin-like growth factor 1 concentrations indicate rapid summer growth in estuarine waters compared to freshwater lake habitats. However, the growth benefits of discrete sub-regions of the estuary vary by month. Muscle tissue stable isotope analyses of carbon and nitrogen indicate non-overlapping isotopic signatures of Dolly Varden captured at each estuary sub-region. Therefore there is behavioral spatial separation among estuarine Dolly Varden despite broadly similar body size and diet across the estuarine habitat. Finally, I employed otolith microchemistry (Sr/Ca, Ba/Ca) to evaluate the lifetime migratory history of 366 Dolly Varden captured throughout the watershed. Nearly all Dolly Varden migrate to sea at least once in their life, with most doing so at age four. However, after age four migration rates decline, to near zero by age seven. Fully resident individuals exist within marine-accessible portions of the watershed, and comprise almost 15% of fish over age six. These data demonstrate that Dolly Varden exhibit wide diversity in movement behavior among and within watersheds. These patterns change with ontogeny, and are likely shaped by the size-specific costs and benefits of alternative habitat use and resource availability. Analogous dynamics likely drive life-history diversity in many iteroparous, facultatively anadromous species.
Download or read book A Preliminary Study of the Migration Growth of the Dolly Varden Char in Kitoi Bay Alaska written by L. Revet and published by . This book was released on 1962 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feeding Habits of Dolly Varden Char Salvelinus Malma at Afognak Lake Alaska written by Charles S. Polityka and published by . This book was released on 1965 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters thesis on study made in 1963 to determine feeding habits and the extent of their predation on salmon of the Afognak system.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2013 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Alaskan Beaufort Sea written by Peter W. Barnes and published by Elsevier. This book was released on 2013-09-17 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaskan Beaufort Sea: Ecosystems and Environments provides an interdisciplinary view into almost all aspects of the environment, with a detailed survey of the background literature. This book focuses on the Alaskan Beaufort Shelf environment. Organized into four parts encompassing 20 chapters, this book begins with an overview of the characteristics and history of the region in which the research took place and defines the objectives of the studies program. This text then examines the subsynoptic meteorological networks along the Beaufort Sea coast and shelf. Other chapters consider the thermally generated mesoscale effects on surface winds and the orographic mesoscale effects on surface winds. This book discusses as well the phytoplankton associations and relative phytoplankton production in the area between the 20-m depth contour and the edge of the ice in summer. The final chapter deals with the characteristics of the ice cover and oil-ice interactions that will affect cleanup activities after blowout. This book is a valuable resource for scientists and conservationists.
Download or read book Evolution Illuminated written by Andrew P. Hendry and published by Oxford University Press, USA. This book was released on 2004 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work gives a critical overview on the evolution and population biology of salmon and their relatives. It should appeal to investigators in each of the scientific disciplines it integrates - evolutionary biology, ecology, salmonid biology, management and conservation. Variation in salmonids can be used to illustrate virtually all evolution.
Download or read book The Freshwater Fishes of Alaska written by James Edwin Morrow and published by . This book was released on 1980 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists all known species.
Download or read book Cumulative Environmental Effects of Oil and Gas Activities on Alaska s North Slope written by National Research Council and published by National Academies Press. This book was released on 2003-09-04 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book identifies accumulated environmental, social and economic effects of oil and gas leasing, exploration, and production on Alaska's North Slope. Economic benefits to the region have been accompanied by effects of the roads, infrastructure and activies of oil and gas production on the terrain, plants, animals and peoples of the North Slope. While attempts by the oil industry and regulatory agencies have reduced many of the environmental effects, they have not been eliminated. The book makes recommendations for further environmental research related to environmental effects.
Download or read book At the Heart of Katmai written by Katherine Johnson Ringsmuth and published by Department of Interior National Park Service. This book was released on 2013 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Companion to the Anthropology of American Indians written by Thomas Biolsi and published by John Wiley & Sons. This book was released on 2008-03-10 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Companion is comprised of 27 original contributions by leading scholars in the field and summarizes the state of anthropological knowledge of Indian peoples, as well as the history that got us to this point. Surveys the full range of American Indian anthropology: from ecological and political-economic questions to topics concerning religion, language, and expressive culture Each chapter provides definitive coverage of its topic, as well as situating ethnographic and ethnohistorical data into larger frameworks Explores anthropology’s contribution to knowledge, its historic and ongoing complicities with colonialism, and its political and ethical obligations toward the people 'studied'
Download or read book Charrs written by E.K. Balon and published by Springer. This book was released on 1980-04-30 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A History of Sockeye Salmon Research Karluk River System Alaska 1880 2010 written by Richard Gard and published by . This book was released on 2014 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Success written by T. H. Clutton-Brock and published by University of Chicago Press. This book was released on 1988 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is well worth buying for its detailed summaries of the 25 studies, many of which are classic long-term projects, and for its insights into the factors determining reproductive success."—William J. Sutherland, TREE "A must read for anyone interested in evolution, mating/social systems, and population ecology."—John L. Koprowski, IJournal of Insect Behavior
Download or read book EPA 670 2 written by and published by . This book was released on 1973-11 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coastal Ecological Systems of the United States written by Howard T. Odum and published by Conservation Foundation. This book was released on 1974-06-01 with total page 1977 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration of Freshwater Fishes written by Martyn Lucas and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies have increasingly demonstrated the widespread existence of spatio-temporal variations in the abundance and distribution of species of freshwater fishes, previously assumed not to move between habitats. These movements are often on a seasonal or ontogenetic basis, for spawning, feeding and refuge, and in many cases are fundamental for the successful completion of lifecycles. This important book provides a single source for a range of previously widely dispersed information on these movements of fish in fresh waters, covering potamodromous fishes as well as the more familiar diadromous species, worldwide. Contents include full descriptions of types of migration and spatial behaviour, the stimulus and capacity for fish to migrate, the effects of climate on patterns of migratory behaviour, a taxonomic analysis (mostly by family) of freshwater fish migration, methods for studying migration, and details of the impacts of man's activities on freshwater fish migration. Migration of Freshwater Fishes provides an excellent and comprehensive reference to which the river manager, biologist or student can now refer to obtain information, advice and current opinion on the migratory behaviour of most taxonomic groups of fishes occurring in fresh water. University libraries and aquatic research stations should also have copies of this essential reference book on their shelves. Well-known international authors. Of great commercial importance to fisheries and professional angling bodies. Draws together much new information in one place. Detailed review of world wide migratory behaviour for most groups of freshwater fishes. Pure and applied relevance, for academics, fisheries scientists, river managers and conservationists. This comprehensive book includes 67 tables and figures and over 1,400 references.
Download or read book Drafting a Conservation Blueprint written by Craig Groves and published by . This book was released on 2003-05-16 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drafting a Conservation Blueprint lays out for the first time in book form a step-by-step planning process for conserving the biological diversity of entire regions. In an engaging and accessible style, the author explains how to develop a regional conservation plan and offers experience-based guidance that brings together relevant information from the fields of ecology, conservation biology, planning, and policy. Individual chapters outline and discuss the main steps of the planning process, including: • an overview of the planning framework • selecting conservation targets and setting goals • assessing existing conservation areas and filling information gaps • assessing population viability and ecological integrity • selecting and designing a portfolio of conservation areas • assessing threats and setting priorities A concluding section offers advice on turning conservation plans into action, along with specific examples from around the world. The book brings together a wide range of information about conservation planning that is grounded in both a strong scientific foundation and in the realities of implementation.
