Composition and Distribution of Streambed Sediments in the Penobscot River, Maine, May 1999

Surficial geology and availability of ground water in part of the lower Penobscot River basin, Maine

10.3133/ha225 ◽

1966 ◽

Keyword(s):

Ground Water ◽

River Basin ◽

Surficial Geology ◽

Penobscot River

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Evidence of Life Cycle Diversity of River Herring in the Penobscot River Estuary, Maine

Marine and Coastal Fisheries ◽

10.1002/mcf2.10157 ◽

2021 ◽

Vol 13 (3) ◽

pp. 263-276

Author(s):

Justin R. Stevens ◽

Rory Saunders ◽

William Duffy

Keyword(s):

Life Cycle ◽

River Estuary ◽

River Herring ◽

Penobscot River

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Concentrations and Distribution of Trace Metals in Water and Streambed Sediments of Orogodo River, Southern Nigeria

Soil and Sediment Contamination An International Journal ◽

10.1080/15320383.2012.649378 ◽

2012 ◽

Vol 21 (3) ◽

pp. 382-406 ◽

Cited By ~ 9

Author(s):

Chukwujindu M. A. Iwegbue ◽

Francis O. Arimoro ◽

Godwin E. Nwajei ◽

Osayonmo I. Eguavoen

Keyword(s):

Trace Metals ◽

Southern Nigeria ◽

Streambed Sediments

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Assessing demographic effects of dams on diadromous fish: a case study for Atlantic salmon in the Penobscot River, Maine

ICES Journal of Marine Science ◽

10.1093/icesjms/fsv083 ◽

2015 ◽

Vol 72 (8) ◽

pp. 2423-2437 ◽

Cited By ~ 17

Author(s):

Julie L. Nieland ◽

Timothy F. Sheehan ◽

Rory Saunders

Keyword(s):

Atlantic Salmon ◽

Performance Metrics ◽

Survival Rates ◽

Population Viability Analysis ◽

River System ◽

Diadromous Fish ◽

Viability Analysis ◽

Penobscot River ◽

Passage Efficiency ◽

Demographic Effects

Abstract Dams are a major contributor to the historic decline and current low abundance of diadromous fish. We developed a population viability analysis to assess demographic effects of dams on diadromous fish within a river system and demonstrated an application of the model with Atlantic salmon in the Penobscot River, Maine. We used abundance and distribution of wild- and hatchery-origin adult salmon throughout the watershed as performance metrics. Salmon abundance, distribution to upper reaches of the Penobscot watershed, and the number and proportion of wild-origin fish in the upper reaches of the Penobscot watershed increased when dams, particularly mainstem dams, were removed or passage efficiency was increased. Salmon abundance decreased as indirect latent mortality per dam was increased. Salmon abundance increased as marine or freshwater survival rates were increased, but the increase in abundance was larger when marine survival was increased than when freshwater survival was increased. Without hatchery supplementation, salmon abundance equalled zero with low marine and freshwater survival but increased when marine and freshwater survival rates were increased. Models, such as this one, that incorporate biological, environmental, and functional parameters can be used to predict ecological responses of fish populations and can help evaluate and prioritize management and restoration actions for diadromous fish.

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