Download or read book Migratory Fish Resources of Northwest Coastal Streams written by Leon A. Verhoeven and published by . This book was released on 1974 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Opposing Forces Evaluating Multiple Ecological Roles of Pacific Salmon in Coastal Stream Ecosystems written by 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 Final Environmental Statement written by United States. Bureau of Land Management and published by . This book was released on 1979 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S West Coast Fisheries for Highly Migratory Species Fishery Management Plan written by and published by . This book was released on 2003 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Species Profiles written by Gilbert B. Pauley and published by [Washington, D.C.] : Fish and Wildlife Service, U.S. Department of the Interior, Coastal Ecology Group, Waterways Experiment Station, U.S. Army Corps of Engineers. This book was released on 1989 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NOAA Technical Memorandum OMPA written by and published by . This book was released on 1981 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Resources Research Catalog written by and published by . This book was released on 1966 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft Environmental Statement written by United States. Bureau of Land Management and published by . This book was released on 1978 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Movement and Assemblage Dynamics in a Pacific Northwest Riverscape written by Colden V. Baxter and published by . This book was released on 2002 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined fish movements and assemblage dynamics in the Wenaha, Grande Ronde, Snake river system of northeast Oregon and southeast Washington. I investigated the role of fish movement in the dynamics of stream fish assemblages and evaluated relationships between species movement, assemblage structure, and the heterogeneity of habitat at multiple scales within the river network. In doing so, I employed a landscape approach, visualizing the heterogeneity and dynamics of the system as a "riverscape" that sets the stage for the ecology of stream fishes. I quantified fish assemblage dynamics, characterized the nature and extent of movement by representative fish species, and assessed spatial and temporal heterogeneity of stream habitat within the river network. I applied multiple methods, including underwater fish surveys and radio telemetry, and used multiple sampling approaches that allowed me to detect patterns at nested spatial and temporal scales. I found that spatial patterns in fish assemblage structure were highly dynamic over seasonal to diel temporal scales. Seasonal changes in fish assemblage patterns along the length of the river system were primarily driven by the migration of native fishes such as mountain whitefish, bull trout, and largescale suckers. These highly migratory species exhibited a diverse array of movement strategies and often had annual ranges of hundreds of kilometers. The movement of fishes at smaller spatial scales influenced diel dynamics of fish assemblage patterns. Important habitat features at stream, valley segment and channel unit scales were separated spatially, and fish species exhibited a variety of migratory strategies that reflected the complementary use of habitats distributed throughout the riverscape. The importance of fish migration and the dynamic nature of stream fish assemblages and fish habitat relationships should be taken into account in research and conservation of stream fishes. Current conceptual frameworks for stream fish assemblages do not fully reflect the temporal complexity of stream fish life histories or the spatial heterogeneity of stream habitat. I introduce an alternative framework by integrating fish movement into a dynamic perspective of assemblages set within the context of the riverscape, and raise questions regarding the nature of ecological communities.
Download or read book Fish Migration and Fish Passage written by Willis A. Evans and published by . This book was released on 1974 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitats and Biota of the Gulf of Mexico Before the Deepwater Horizon Oil Spill written by C. Herb Ward and published by Springer. This book was released on 2017-06-26 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is open access under a CC BY-NC 2.5 license. The Gulf of Mexico is an open and dynamic marine ecosystem rich in natural resources but heavily impacted by human activities, including agricultural, industrial, commercial and coastal development. The Gulf of Mexico has been continuously exposed to petroleum hydrocarbons for millions of years from natural oil and gas seeps on the sea floor, and more recently from oil drilling and production activities located in the water near and far from shore. Major accidental oil spills in the Gulf are infrequent; two of the most significant include the Ixtoc I blowout in the Bay of Campeche in 1979 and the Deepwater Horizon Oil Spill in 2010. Unfortunately, baseline assessments of the status of habitats and biota in the Gulf of Mexico before these spills either were not available, or the data had not been systematically compiled in a way that would help scientists assess the potential short-term and long-term effects of such events. This 2-volume series compiles and summarizes thousands of data sets showing the status of habitats and biota in the Gulf of Mexico before the Deepwater Horizon Oil Spill. Volume 2 covers historical data on commercial and recreational fisheries, with an analysis of marketing trends and drivers; ecology, populations and risks to birds, sea turtles and marine mammals in the Gulf; and diseases and mortalities of fish and other animals that inhabit the Gulf of Mexico.
Download or read book OCS Outer Continental Shelf Lease Sale No 48 Offshore Southern California written by and published by . This book was released on 1979 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proposed 1979 Outer Continental Shelf Oil and Gas Lease Sale Offshore Southern California written by United States. Bureau of Land Management and published by . This book was released on 1979 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbia River Basin Fishery Resources written by United States. Congress. Senate. Committee on Interstate and Foreign Commerce. Subcommittee on Merchant Marine and Fisheries and published by . This book was released on 1959 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Columbia River Basin Fishery Resources written by United States. Congress. Senate. Interstate and Foreign Commerce Committee. Merchant Marine and Fisheries Subcommittee and published by . This book was released on 1959 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ecological Characterization of the Pacific Northwest Coastal Region Characterization atlas regional synopsis written by and published by . This book was released on 1980 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Migration and the Development of Economic Opportunity in the Pacific Northwest written by United States. National Resources Planning Board and published by . This book was released on 1939 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
