Results 21 to 30 of about 4,195 (192)

The multi-scale aggregative response of cormorants to the mass stocking of fish in rivers [PDF]

, 2013
journal ...
Arima Tomoko, Ashizawa Akihiko, FUJIOKA Masahiro, Kumada Nao, Tsuboi Jun-ichi   +4 more
core   +1 more source

Assessing the validity of the accelerometry technique for estimating the energy expenditure of diving double-crested cormorants Phalacrocorax auritus [PDF]

, 2011
Over the past few years, acceleration-data loggers have been used to provide calibrated proxies of energy expenditure: The accelerometry technique. Relationships between rate of oxygen consumption and a derivation of acceleration data termed "overall ...
Butler, P. J., Enstipp, M. R., Gremillet, D., Halsey, L. G., Jones, D. R., Martin, G. R., White, C. R., Wilson, R. P.   +7 more
core   +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

Cormorant predation on PIT-tagged lake fish [PDF]

, 2014
The present study use data from recovered PIT (Passive Integrated Transponder) tags to explore species- and size-specific annual predation rates by cormorants on three common lacustrine fishes (size range 120-367 mm) in a European lake; roach (Rutilus ...
Baktoft, Henrik, Jansen, Teunis, Jepsen, Niels, Koed, Anders, Pedersen, Stig, Skov, Christian   +5 more
core   +2 more sources

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

Metabolic rate throughout the annual cycle reveals the demands of an Arctic existence in Great Cormorants [PDF]

, 2011
Aquatic endotherms living in polar regions are faced with a multitude of challenges, including low air and water temperatures and low illumination, especially in winter. Like other endotherms from cold environments, Great Cormorants (Phalacrocorax carbo)
Ancel A., Andersen S. M., Bevan R. M., Cook T., Craig R. White, David Grémillet, Drent R. H., Dunn E. H., Graham R. Martin, Jobling M., Jonathan A. Green, Keller T. M., Patrick J. Butler, Platteeuw M., Rezende E. L., Stephenson R., Wilson R. P., Wilson R. P.   +17 more
core   +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

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