Results 21 to 30 of about 378 (155)

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

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   +1 more source

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

Predation probabilities and functional responses: How piscivorous waterbirds respond to pulses in fish abundance

Ecosphere, 2022
How predators respond to changes in prey abundance (i.e., functional responses) is foundational to consumer–resource interactions, predator–prey dynamics, and the stability of predator–prey systems.
Nathan J. Hostetter, Quinn Payton, Daniel D. Roby, Ken Collis, Allen F. Evans   +4 more
doaj   +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

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   +3 more sources

Fine scale characteristics of catfish aquaculture ponds influencing piscivorous avian species foraging use in the Mississippi Delta.

PLoS ONE, 2020
Piscivorous avian species are the main source of catfish depredation at aquaculture facilities in Mississippi, resulting in the economic loss of millions of dollars every year.
Paul C Burr, Jimmy L Avery, Garrett M Street, Bronson K Strickland, Brian S Dorr   +4 more
doaj   +1 more source

Photogrammetry and multievent modeling to determine effects of disturbance on seabird colony nest success

Endangered Species Research
Seabirds are sentinel species, with shifts in their demographics reflecting the cumulative pressures facing global marine ecosystems. However, studying their reproductive success is often limited by the difficulty of continuous observation throughout the
RM Stapleton, LLE Cowen, GTW McClelland, SJR Broadley, R Joy   +4 more
doaj   +1 more source

Cormorant abundance, diet, and foraging habits in Arizona

Journal of Field Ornithology, 2022
In Arizona, USA, Double-crested Cormorants (Nannopterum auritum) primarily overwinter, whereas Neotropic Cormorants (N. brasilianum) are common residents year round.
Larisa E. Harding, Jacob I. Mesler
doaj  

Comparison of Sampling Strategies to Estimate Abundance of Double-Crested Cormorants in Western Mississippi

Human-Wildlife Interactions, 2017
We compared 2 sampling strategies designed to estimate abundance of double-crested cormorants (Phalacrocorax auritus, hereafter cormorants) on aquaculture ponds in western Mississippi.
Aaron T. Pearse , Brian S. Dorr, Stephen J. Dinsmore, Richard M. Kaminski   +3 more
doaj   +1 more source