Download or read book History of the Fishery and Summary Statistics of the Sockeye Salmon Oncorhynchus Nerka Runs to the Chignik Lakes Alaska 1888 1966 written by Michael L. Dahlberg and published by . This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Informational Leaflet written by and published by . This book was released on 1985 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Digest U S Fish and Wildlife Service written by U.S. Fish and Wildlife Service and published by . This book was released on 1953 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report on the Salmon Fisheries in Alaska written by and published by . This book was released on 1914 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Before the Fish and Wildlife Service Department of the Interior written by U.S. Fish and Wildlife Service and published by . This book was released on 1948 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Market News written by and published by . This book was released on 1988 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Progress Report on Alaska Fishery Management and Research 1957 1958 written by United States. Bureau of Commercial Fisheries and published by . This book was released on 1958 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alaska Fishery Research Bulletin written by and published by . This book was released on 2005 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report on the Salmon Fisheries of Alaska written by and published by . This book was released on 1896 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ethology and Behavioral Ecology of Sea Otters and Polar Bears written by Randall W. Davis and published by Springer. This book was released on 2022-07-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea otters and polar bears are carnivorous marine mammals that still resemble their terrestrial ancestors. Compared with Cetacea (whales and dolphins), Sirenia (dugongs and manatees), and Pinnipedia (seals, sea lions, and walrus), they are less adapted for an aquatic life and the most recently evolved among marine mammals. Sea otters are amphibious but seldom come ashore, and polar bears primarily occur on sea ice or along the shore. When at sea, both species spend most of their time swimming at the surface or making short, shallow dives when foraging or pursuing prey. Indeed, polar bears rarely pursue seals in water. Nevertheless, polar bears are powerful swimmers and will stalk seals from the water. As with many other large carnivores, they are solitary hunters. Although sea otters are gregarious and form aggregations at sea called rafts, they are primarily asocial. Except during mating, the principal interaction among sea otters occurs between a female and offspring during the six-month dependency period. In large carnivores (e.g., wolves and lions) that feed on ungulates, sociality and cooperation are favored because of the need to capture large prey and defend carcasses. Polar bears, which are the largest terrestrial carnivore, are solitary hunters of seals and are neither gregarious nor social. Males and females briefly associate during courtship and mating. During this time, males aggressively compete for females. At other times, males generally avoid each other except for aggregations of males that form while summering on land, and females with cubs avoid males, which are known for infanticide. As with sea otters, the interaction of polar bears outside of mating occurs between a female and her offspring during the 2-3 year dependency period. This interaction is critically important when altricial cubs are born in the winter den. This book provides new insight into the ethology and behavioral ecology of sea otters and polar bears. Each chapter reviews the discoveries of previous studies and integrates recent research using new techniques and technology. The authors also address historic and current anthropogenic challenges for their survival as climate change alters entire marine ecosystems.

Download or read book An Assessment of Potential Mining Impacts on Salmon Ecosystems of Bristol Bay Alaska written by U.s. Environment Protection Agency and published by Createspace Independent Publishing Platform. This book was released on 2014-08 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bristol Bay watershed in southwestern Alaska supports the largest sockeye salmon fishery in the world, is home to 25 Federally Recognized Tribal Governments, and contains large mineral resources. The potential for large-scale mining activities in the watershed has raised concerns about the impact of mining on the sustainability of Bristol Bay's world-class fisheries, and the future of Alaska Native tribes in the watershed who have maintained a salmon-based culture and subsistence-based lifestyle for at least 4,000 years. The U.S. Environmental Protection Agency (USEPA) launched this assessment to determine the significance of Bristol Bay's ecological resources and evaluate the potential impacts of large-scale mining on these resources. The USEPA will use the results of this assessment to inform the consideration of options consistent with its role under the Clean Water Act. The assessment is intended to provide a scientific and technical foundation for future decision making; the USEPA will not address use of its regulatory authority until the assessment becomes final and has made no judgment about whether and how to use that authority at this time.

Download or read book The Pacific Salmon Fisheries written by James A. Crutchfield and published by Routledge. This book was released on 2013-10-18 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study attributes the chronic economic distress of the valuable Pacific salmon industry not only to decline in catch but also to the economic problems of open access ocean fisheries. It analyzes salmon public management programs and proposes alternatives. Originally published in 1969

Download or read book Alaska Fishery and Fur seal Industries in written by and published by . This book was released on 1954 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Review of the Alaska Salmon Fisheries written by Willis Horton Rich and published by . This book was released on 1931 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report on the Salmon Fisheries of Alaska written by United States. Division of Alaskan Fisheries and published by . This book was released on 1896 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alaska Salmon Fishery written by United States. Congress. House. Committee on Merchant Marine and Fisheries and published by . This book was released on 1938 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 1980 Alaska Commercial Salmon Fisheries Review written by and published by . This book was released on 1980 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: