Results 11 to 20 of about 976 (197)

Modeling the Economic Impacts of Double-Crested Cormorant Damage to a Recreational Fishery

Human-Wildlife Interactions, 2017
The double-crested cormorant (Phalacrocorax auritus) has undergone a significant range expansion in the Great Lakes area of the United States since the 1970s, negatively impacting native fish populations and sport fisheries.
Stephanie A. Shwiff, Katy N. Kirkpatrick, Travis L. DeVault, Steven S. Shwiff   +3 more
doaj   +3 more sources

Mercury concentrations in Double—crested Cormorant chicks across Canada [PDF]

Archives of Environmental Contamination and Toxicology, 2017
Abstract Mercury (Hg) biomagnifies in aquatic food chains and can reach high concentrations in fish-eating birds. Spatial patterns of Hg have been found in freshwater ecosystems across Canada for many taxa including fish and birds.
Raphael A. Lavoie, Linda M. Campbell
openaire   +4 more sources

Double-crested Cormorants [PDF]

, 2016
The history of conflict between double-crested cormorants and human interest in fisheries is long and convoluted. Overall, double-crested cormorants are not major consumers of commercial and sportfish species. However, exceptions have been recorded at specific sites with documented impacts on local fisheries.
Brian S. Dorr, Kristi L. Sullivan, Paul D. Curtis, Richard B. Chipman, Russell D. McCullough   +4 more
openaire   +3 more sources

Observations of Nocturnal Foraging in the Double-Crested Cormorant

Colonial Waterbirds, 1998
-Double-crested Cormorants (Phalacrocwax auritusj are normally considered a diurnal species. Here we describe cormorants foraging nocturnally in an oxbow lake in Mississippi. We have observed this behavior only once during 30 capture attempts over seven years. Received 22 October 1997, accepted 3 March 1998.
King, D. Tommy, Harrel, J. Brent, Dorr, Brian, Reinhold, David   +3 more
openaire   +4 more sources

The Effectiveness of Commercially Available Double-Crested Cormorant (Nannopterum auritus) Deterrent Methods in Reducing Loafing Time on Floating Oyster Cages

Diversity, 2023
The Wildlife Services—National Wildlife Research Center Mississippi Field Station, working in conjunction with Mississippi State University, conducted a study to evaluate the effectiveness of several non-lethal, commercial, physical bird deterrents ...
Fred L. Cunningham, Paul Burr, Jason Glover, Jason Tappa, Madeline Redd, Guiming Wang   +5 more
doaj   +1 more source

Holding a wing horizontal: Roles for muscles of the pectoral girdle other than the main two flight muscles. [PDF]

J Anat
This report explores which muscles of the pectoral girdle are employed to allow birds to hold their wings horizontally with a level aerofoil surface during a glide. Abstract Whilst many birds glide briefly with wings held horizontally, some species maintain this posture for extended periods during soaring.
Deeming DC, Mosto MC.
europepmc   +2 more sources

Estimating potential menhaden consumption by double-crested cormorants along the coast of North Carolina

Frontiers in Marine Science, 2023
The south Atlantic coast supports one of the highest assemblages of non-breeding double-crested cormorants (Nannopterum auritum) known and is a convergence area for Atlantic menhaden (Brevoortia tyrannus) during the winter months.
Bryan D. Watts, Barton J. Paxton, Chance Hines, Scott K. Anderson   +3 more
doaj   +1 more source

Management of Double-Crested Cormorants to Improve Sport Fisheries in Michigan: Three Case Studies

Human-Wildlife Interactions, 2017
Impacts of double-crested cormorants (Phalacrocorax auritus) to fisheries have been documented, but evaluation of the process and outcomes of cormorant management to reduce impacts on fisheries is lacking. We provide a synthesis of adaptive management of
Brian S. Dorr, Shauna L. Hanisch, Peter H. Butchko, David G. Fielder   +3 more
doaj   +1 more source

Assessing Biodiversity at Eastern Oyster (<i>Crassostrea virginica</i>) Aquaculture and Reef Sites Utilizing Real-Time Monitoring and Environmental DNA in Rehoboth Bay, Delaware, USA. [PDF]

Ecol Evol
Eastern oysters (Crassostrea virginica) are a keystone species and vital to the commercial shellfish industry, acting as environmental engineers that enhance biodiversity. To study their impact, real‐time monitoring and Environmental DNA analysis were conducted at various sites in Rehoboth Bay, Delaware and 23 species were identified, with Spot ...
Attarwala T, Parsaeimehr A, Ozbay G.
europepmc   +2 more sources

Effects of Aquaculture on Migration and Movement Patterns of Double-Crested Cormorants

Human-Wildlife Interactions, 2017
We analyzed 10,620 recovery records for double-crested cormorants (Phalacrocorax auritus) banded as nestlings from 1923 to 2006 to determine the population’s age structure, migration routes, dispersal patterns, and the possible influence of the expansion
D. Tommy King, Bradley F. Blackwell, Brian S. Dorr, Jerrold L. Belant   +3 more
doaj   +1 more source