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Author: Andrew D. Gryska Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 44
Book Description
A stock assessment was performed for the Arctic grayling (Thymallus arcticus) population inhabiting a 16.2 km portion of the Snake River near Nome, Alaska. The study was conducted during June 2016 and used mark–recapture techniques to estimate abundance and length composition of the population. This population is periodically assessed to ensure that it is sustained at or above a management-prescribed level of 600 fish ≥350 mm fork length (FL), and this population was last assessed during 2011. Using hook-and-line gear, a total of 255 fish were captured. Estimated abundance of Arctic grayling ≥350 mm FL was 764 (SE = 151), of which 85% of the population was 375–474 mm FL. No management actions were deemed necessary because the abundance estimate exceeded the management objective and was sufficiently precise.
Author: Andrew D. Gryska Publisher: ISBN: Category : Arctic grayling Languages : en Pages : 44
Book Description
A stock assessment was performed for the Arctic grayling (Thymallus arcticus) population inhabiting a 16.2 km portion of the Snake River near Nome, Alaska. The study was conducted during June 2016 and used mark–recapture techniques to estimate abundance and length composition of the population. This population is periodically assessed to ensure that it is sustained at or above a management-prescribed level of 600 fish ≥350 mm fork length (FL), and this population was last assessed during 2011. Using hook-and-line gear, a total of 255 fish were captured. Estimated abundance of Arctic grayling ≥350 mm FL was 764 (SE = 151), of which 85% of the population was 375–474 mm FL. No management actions were deemed necessary because the abundance estimate exceeded the management objective and was sufficiently precise.
Author: Javier Lobón-Cerviá Publisher: John Wiley & Sons ISBN: 1119268311 Category : Technology & Engineering Languages : en Pages : 821
Book Description
Brown Trout: Biology, Ecology and Management A comprehensive guide to the most current research, history, genetics and ecology of the brown trout including challenging environmental problems The brown trout is an iconic species across its natural European distribution and has been introduced throughout the World. Brown Trout offers a comprehensive review of the scientific information and current research on this major fish species. While the brown trout is the most sought species by anglers, its introduction to various waters around the world is causing serious environmental problems. At the same time, introduction of exogenous brown trout lineages threats conservation of native gene pools of populations in many regions. The authors summarize the important aspects of the brown trout’s life history and ecology and focus on the impact caused by the species. The text explores potential management strategies in order to maintain numerous damaged populations within its natural distributional range and to ameliorate its impacts in exotic environments. The authors include information on a wide-range of topics such as recent updates in population genetics, evolutionary history, reproductive traits and early ontogeny, life history plasticity in anadromous brown trout and life history of the adfluvial brown trout and much more. This vital resource: Contains the latest research on the biology and ecology of brown trout Includes information on phylogeography, genetics, population dynamics and stock management Spotlights the brown trout’s introduction to regions around the world and the serious environmental impacts Offers a comprehensive review of conservation and management techniques Written for salmonid scientists and researchers, fishery and environmental managers, and students of population genetics, ecology and population dynamics, Brown Trout explores the most recent findings on the history, ecology and sustainability of this much-researched species.
Author: Hiroshi Ueda Publisher: CRC Press ISBN: 1466595140 Category : Nature Languages : en Pages : 196
Book Description
Among the roughly 30,000 species of fish, migratory species account for only 165 species, but most of them are very important fisheries resources. This book presents up-to-date innovative research results on the physiology and ecology of fish migration. It focuses on salmon, eels, lampreys, and bluefin tuna. The book examines migratory behavior, sp
Author: Joseph S. Nelson Publisher: John Wiley & Sons ISBN: 1119220823 Category : Nature Languages : en Pages : 752
Book Description
Take your knowledge of fishes to the next level Fishes of the World, Fifth Edition is the only modern, phylogenetically based classification of the world’s fishes. The updated text offers new phylogenetic diagrams that clarify the relationships among fish groups, as well as cutting-edge global knowledge that brings this classic reference up to date. With this resource, you can classify orders, families, and genera of fishes, understand the connections among fish groups, organize fishes in their evolutionary context, and imagine new areas of research. To further assist your work, this text provides representative drawings, many of them new, for most families of fishes, allowing you to make visual connections to the information as you read. It also contains many references to the classical as well as the most up-to-date literature on fish relationships, based on both morphology and molecular biology. The study of fishes is one that certainly requires dedication—and access to reliable, accurate information. With more than 30,000 known species of sharks, rays, and bony fishes, both lobe-finned and ray-finned, you will need to master your area of study with the assistance of the best reference materials available. This text will help you bring your knowledge of fishes to the next level. Explore the anatomical characteristics, distribution, common and scientific names, and phylogenetic relationships of fishes Access biological and anatomical information on more than 515 families of living fishes Better appreciate the complexities and controversies behind the modern view of fish relationships Refer to an extensive bibliography, which points you in the direction of additional, valuable, and up-to-date information, much of it published within the last few years Fishes of the World, Fifth Edition is an invaluable resource for professional ichthyologists, aquatic ecologists, marine biologists, fish breeders, aquaculturists, and conservationists.
Author: John D. Varley Publisher: Stackpole Books ISBN: 9780811727778 Category : Nature Languages : en Pages : 170
Book Description
This richly illustrated and thoroughly researched reference covers all the species of fish and every aspect of their existence in one of the most famous sport fisheries in the world. This edition includes new material on the impact of forest fires and the introduction of non-native species; an expanded chapter on angling; and an assessment of recent management policies. Full color plates and historic b&w photos.
Author: Food and Agriculture Organization of the United Nations Publisher: Food & Agriculture Org. ISBN: 9251307938 Category : Technology & Engineering Languages : en Pages : 399
Book Description
The FAO Fishery and Aquaculture Circular C942 Revision 3 (C942 Rev. 3) updates and expands the scope of previous revisions of the circular. C942 Rev. 3 is an important baseline document, intended to assist in the global understanding of inland fisheries and inform dialogue on their current and future role. The third revision reviews the status and trends of inland fisheries catch at global, continental and subcontinental levels. It places inland capture fisheries in the context of overall global fish production, and calls attention to the importance of inland capture fisheries with respect to food security and nutrition and the Sustainable Development Goals. It quantifies global inland fisheries resources in terms of food production, nutrition, employment, economic contribution with respect to those countries/regions or subnational areas where they are important. A characterization approach to distinguish large-scale and small-scale fishing operations and their relative contributions is provided. The review provides estimated economic values of inland fisheries, as well as a valuation of potential replacement cost of these (in terms of dollars, other resources such as land and water, feeds). There is also an analysis of the extent and economic value of recreational inland fisheries. The contribution to employment and the gender differences related to this are quantified. The linkages between inland fisheries and biodiversity are also explored. C942 Rev. 3 discusses ways to measure and assess inland fisheries, in particular, how to establish more accurately inland fishery catches in the many situations where there are challenges to collection of catch statistics.
Author: Food and Agriculture Organization of the United Nations Publisher: Food & Agriculture Org. ISBN: 9251072140 Category : Nature Languages : en Pages : 194
Book Description
The importance of recreational fisheries is increasing in many transitional economies. These guidelines focus on recreational fisheries and describe strategies to promote environmentally sustainable and socially responsible management of such fisheries. To this end, the document details policy, managerial and behavioural recommendations for sustainable recreational fisheries.
Author: Andrew J Hansen Publisher: Island Press ISBN: 161091712X Category : Nature Languages : en Pages : 408
Book Description
Scientists have been warning for years that human activity is heating up the planet and climate change is under way. We are only just beginning to acknowledge the serious effects this will have on all life on Earth. The federal government is crafting broad-scale strategies to protect wildland ecosystems from the worst effects of climate change. One of the greatest challenges is to get the latest science into the hands of resource managers entrusted with vulnerable wildland ecosystems. This book examines climate and land-use changes in montane environments, assesses the vulnerability of species and ecosystems to these changes, and provides resource managers with collaborative management approaches to mitigate expected impacts. Climate Change in Wildlands proposes a new kind of collaboration between scientists and managers--a science-derived framework and common-sense approaches for keeping parks and protected areas healthy on a rapidly changing planet.
Author: Andrew D. Gryska
Author: Andrew D. Gryska
Author: Andrew D. Gryska
Author: Javier Lobón-Cerviá
Author: United States. Bureau of Sport Fisheries and Wildlife
Author: Hiroshi Ueda
Author: Joseph S. Nelson
Author: John D. Varley
Author: Food and Agriculture Organization of the United Nations
Author: Food and Agriculture Organization of the United Nations
Author: Andrew J Hansen