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- Aquatic ecology (1)
- Aquatic habitats (1)
- Bioclimatology (1)
- Boats and boating (1)
- Chinook salmon (Oncorhynchus tshawytscha) (1)
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- Climatic changes (1)
- Climatic factors (1)
- Columbia River (1)
- Cowlitz River (Wash.) (1)
- Fish populations (1)
- Introduced aquatic organisms (1)
- Kalama River (Wash.) (1)
- Lake Mead National Recreation Area (Ariz. and Nev.) (1)
- Lewis River (Wash.) (1)
- Nevada (1)
- Nonindigenous pests prevention (1)
- Pacific salmon (1)
- Spawning (1)
- Washington (1)
- Zebra mussel (1)
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
The 100th Meridian Initiative In Nevada: Assessing The Westward Movement Of The Zebra Mussel To The Lake Mead National Recreation Area, Megan Mccoy
UNLV Theses, Dissertations, Professional Papers, and Capstones
Zebra mussels, Dreissena polymorpha, are a concern for all bodies of water in North America. East of the 100th Meridian, zebra mussels have infested the waters and dramatically changed the natural ecosystems. The US Fish and Wildlife Services set up the 100th Meridian Initiative project to monitor the boat traffic to and from infested and non-infested waters of the United States and Canada. Surveys were conducted from October 19, 2002 through March 31, 2003, focusing specifically on the Lake Mead National Recreation Area (LMNRA) for the scope of this thesis. This study addresses the movement of trailers, boats, and other …
Fluctuations In Chinook Salmon (Oncorhynchus Tshawytscha) Counts At Three Lower Columbia River Spawning Sites, Eric Michael Loomis
Fluctuations In Chinook Salmon (Oncorhynchus Tshawytscha) Counts At Three Lower Columbia River Spawning Sites, Eric Michael Loomis
UNLV Theses, Dissertations, Professional Papers, and Capstones
Several hypotheses were developed to explore the pronounced increase in Chinook salmon (Oncorhynchus tshawytscha) returning to spawning grounds at the Cowlitz, Kalama, and Lewis Rivers, three tributaries of the lower Columbia River. The study was conducted using data compiled over a ten-year span from 1991-2001. Preliminary indications are that trends in climate are linked to these increases, with the absence of El Niño events and fluctuations in winter precipitation as likely explanations of these phenomena. The unique nature of Chinook life cycles causes them to utilize a variety of habitats that require ideal conditions for maximum survival rates. Correlations between …