Results 41 to 50 of about 17,813 (296)

Riverine Migration Success of Salmonid Smolts Following Their Entrainment in a Hydropower Off‐Channel Diversion in an Upland River

River Research and Applications, EarlyView.
ABSTRACT Salmonid fishes typically express anadromy. During their juvenile riverine emigration, their downstream movements can be inhibited by hydropower schemes that entrain fish in their intakes. Here, the riverine migration success of smolts of brown trout Salmo trutta (“trout smolt”) and Atlantic salmon Salmo salar smolts (“salmon smolt”) was ...
Bertram I. C. Warren, J. Robert Britton
wiley   +1 more source

Hydropower Operations Reduce Alluvial Nesting Habitat and Alter Riverine Turtle Population Demographics

River Research and Applications, EarlyView.
ABSTRACT Hydropower management has altered discharge regimes of large rivers worldwide, reducing sediment mobilization and early‐seral conditions essential for many riverine species. Spiny softshell turtles (Apalone spinifera) rely on alluvial habitats for nesting and may serve as sentinel species to assess the effects of regulated flow regimes and ...
Kayhan Ostovar, Larissa Saarel, Joanna‐Lynn C. Borgogna, Luke Ward, Whalen Alston, Matt Prinkki, Addison Valdez   +6 more
wiley   +1 more source

Experimental Study on Fine Sediment Infiltration (FSI) Processes in Different Gravel Mixtures

River Research and Applications, EarlyView.
ABSTRACT Fine sediment infiltration (FSI) can lead to riverbed clogging, thereby degrading important habitats for aquatic biota in the hyporheic interstitial zone of gravel‐bed rivers (e.g., by reducing oxygen availability). This stress on rivers may increase from anthropogenic influences and can be counteracted by artificial gravel augmentation to ...
Michael Paster, Gábor Fleit, Helmut Habersack, Christoph Hauer   +3 more
wiley   +1 more source

Chinook and Coho salmon hybrids linked to habitat and climatic changes on Vancouver Island, British Columbia

Ecology and Evolution, 2021
Between 2013 and 2019, 63 presumed Chinook salmon Oncorhynchus tshawytscha sampled primarily in the Strait of Georgia (0.63% of total sample) were identified as potential Chinook–Coho (Oncorhynchus kisutch) hybrids by the presence of anomalous ...
H. Andres Araujo, William D. P. Duguid, Ruth Withler, Janine Supernault, Angela D. Schulze, Jessica L. Mckenzie, Kevin Pellett, Terry D. Beacham, Kim Jonsen, Anna Gummer   +9 more
doaj   +1 more source

Saprolegniosis in salmonids and their eggs in Japan [PDF]

Journal of Wildlife Diseases, 2001
An epizootic of the fungal infection saprolegniosis that occurred in freshwater-cultured salmons and their eggs at some hatcheries in Hokkaido (Japan) was investigated. In almost all cases, the initial clinical sign was characterized by the growth of cotton-like mycelia on the fishs' body surface, especially the head, adipose fin, and caudal fin, but ...
M M, Hussein, K, Hatai, T, Nomura
openaire   +2 more sources

Development and Improvement of Habitat Suitability Criteria for Instream Habitat Assessments Conducted in Support of Environmental Flows in Florida

River Research and Applications, EarlyView.
ABSTRACT Florida's regulatory framework requires the establishment of minimum flows to protect aquatic ecosystems and water resources from significant harm. One of the primary methods used to evaluate significant harm is assessment of instream habitat, which relies on Habitat Suitability Criteria (HSC) curves that relate flow regimes and habitat ...
Eric J. Nagid, Kym Rouse Holzwart
wiley   +1 more source

Genetic identification of native populations of Mediterranean brown trout Salmo trutta L. complex (Osteichthyes: Salmonidae) in central Italy

The European Zoological Journal, 2019
Italian native populations of Mediterranean brown trout belong to the Salmo trutta complex. This species complex includes many mitochondrial lineages and phenotypes that have caused taxonomic controversies over time.
A. R. Rossi, G. Petrosino, V. Milana, M. Martinoli, A. Rakaj, L. Tancioni   +5 more
doaj   +1 more source

Search and Passage Are Decoupled for Migrating Trout Kelts at Multi‐Exit Dam

River Research and Applications, EarlyView.
ABSTRACT Longitudinal and lateral river connectivity have been drastically reduced over time, with hydropower development as a major driver of fragmentation. While fishways are widely implemented to support upstream migration, downstream passage remains a major challenge.
Halvor Kjærås, Jon Museth, Finn Økland, Karl Øystein Gjelland, Henrik Baktoft, Torbjørn Forseth   +5 more
wiley   +1 more source

Developing nondestructive techniques for managing conflicts between fisheries and double‐crested cormorant colonies

Wildlife Society Bulletin, 2015
Double‐crested cormorants (Phalacrocorax auritus) have been identified as the source of significant mortality to juvenile salmonids (Oncorhynchus spp.) in the Columbia River Basin.
Yasuko Suzuki, Daniel D. Roby, Donald E. Lyons, Karen N. Courtot, Ken Collis   +4 more
doaj   +1 more source

Restoring Lateral Connectivity to Anthropogenic Riverscapes: Six Lessons From Stage Zero

River Research and Applications, EarlyView.
ABSTRACT Centuries of river modification, particularly straightening and incision, have severely reduced lateral connectivity between rivers and their floodplains. As a result, Stage 0 riverscapes, characterised by high lateral connectivity (e.g., anastomosing or wetland riverscapes), are now rare in anthropogenic landscapes.
Richard J. Mason, Matthew F. Johnson, Ben Eardley, Matthew J. Hemsworth, Arnaud Foret, Luca Mao, Matt Parr, Alan Puttock, Richard E. Brazier   +8 more
wiley   +1 more source