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Full-Text Articles in Life Sciences
American Eel Behavior And Survival In An Impounded River System, Matthew A. Mensinger
American Eel Behavior And Survival In An Impounded River System, Matthew A. Mensinger
Electronic Theses and Dissertations
After beginning life in the Sargasso Sea, American eel enter river systems as juveniles and swim upstream in pursuit of freshwater habitat. Many encounter dams during this migration which act as barriers to upstream movement and limit eel establishment in headwater systems. Some dams have been retrofitted with fishways to improve watershed connectivity, but the individual selection imposed by these structures remains uncharacterized. We considered whether individual differences in behavior (i.e., personality) may be used to predict the propensity of juveniles to use a passage structure, suggesting that eel personality may predict access to habitat upstream of dams. Migrating, juvenile …
Movement And Survival Of Atlantic Salmon Smolts In The Penobscot River, Maine, Alejandro Molina Moctezuma
Movement And Survival Of Atlantic Salmon Smolts In The Penobscot River, Maine, Alejandro Molina Moctezuma
Electronic Theses and Dissertations
The Penobscot River system hosts the largest population of endangered Atlantic salmon Salmo salar in the United States. However, total adult returns in this river remain low. Historically low numbers led to listing of the distinct population segment (DPS) in 2000, and the Penobscot River population was included in the DPS in 2009. Reducing mortality in all life stages is crucial for the recovery of Atlantic salmon populations. One of the life stages associated to high mortality is the juvenile stage (smolts), in which individuals migrate downstream towards the estuary. During this migration smolts face a series of new conditions …
Deforestation In Nineteenth-Century Maine: The Record Of Henry David Thoreau, Geoffrey Paul Carpenter
Deforestation In Nineteenth-Century Maine: The Record Of Henry David Thoreau, Geoffrey Paul Carpenter
Maine History
Thoreau’s Maine Woods, a record of three trips made between 1846 and 1857, offers a combination of literary metaphor and precise botanical and topographical observation. Comparing Thoreau’s journals with recent advances in forest ecology, author Geoffrey Paul Carpenter reveals a detailed picture of the various ways in which logging activity changed the forests, lakes, and rivers of Maine. Carpenter demonstrates that a precise understanding of forest history depends not only on traditional statistical sources, but also on the subjective personal testimony found in the literary record.
Dickey-Lincoln School Lakes Project At Dickey, Maine : Final Environmental Statement, Volume 1-4, U. S. Army Engineer Division, New England
Dickey-Lincoln School Lakes Project At Dickey, Maine : Final Environmental Statement, Volume 1-4, U. S. Army Engineer Division, New England
Dickey-Lincoln School Lakes Project
The proposed Dickey-Lincoln School Lakes Project in northern Maine is a multipurpose installation on the St.John River. The combination hydroelectric power and flood control project is located in Aroostook County, Maine, near the Canadian border. The two proposed earth fill dams located at Dickey are 10,200 feet in length with a maximum height of 335 feet. They would impound 7.7 million acre feet of water at a maximum pool elevation 910 feet mean sea level. A second earth filled dam located 11 miles downstream at Lincoln School would serve as a regulatory dam. It would be 2100 feet in lenqth, …
Water Resources Development Project, Saint John River Basin : Dickey-Lincoln School Lakes, Maine, U.S.A. And Quebec, Canada : Design Memorandum No. 2 : Hydrology And Hydraulic Analysis, Section Iv - Lincoln School Dam-Spillway Design Flood, Department Of The Army, New England Division, Corps Of Engineers
Water Resources Development Project, Saint John River Basin : Dickey-Lincoln School Lakes, Maine, U.S.A. And Quebec, Canada : Design Memorandum No. 2 : Hydrology And Hydraulic Analysis, Section Iv - Lincoln School Dam-Spillway Design Flood, Department Of The Army, New England Division, Corps Of Engineers
Dickey-Lincoln School Lakes Project
The first of four sections comprising Design Memo-randum No. 2. The other sections are: II - Dickey Dam - Spillway Design Flood, III - Lincoln School Dam - Spillway Design Flood and IV - Flood Analysis and Reservoir Regulation. la section I, hydro-logic studies will be confined generally to the drainage area of the Saint John River above the gaging station at Fort Kent, Maine. The purpose of section I is to present the climatological and streamflow data for the Saint John River above Fort Kent in order to establish hydrologic criteria for the design of the Dickey and Lincoln …