Results 21 to 30 of about 5,601 (127)

Using species distribution models to define nesting habitat of the eastern metapopulation of double‐crested cormorants

Ecology and Evolution, 2017
When organisms with similar phenotypes have conflicting management and conservation initiatives, approaches are needed to differentiate among subpopulations or discrete groups.
Kate L. Sheehan, Samuel T. Esswein, Brian S. Dorr, Greg K. Yarrow, Ron J. Johnson   +4 more
doaj   +1 more source

Estimating Waterbird Abundance on Catfish Aquaculture Ponds Using an Unmanned Aerial System

Human-Wildlife Interactions, 2019
In this study, we examined the use of an unmanned aerial system (UAS) to monitor fish-eating birds on catfish (Ictalurus spp.) aquaculture facilities in Mississippi, USA.
Paul C. Burr, Sathishkumar Samiappan, Lee A. Hathcock, Robert J. Moorhead, Brian S. Dorr   +4 more
doaj   +1 more source

Evidence for a Negative Effect of Double-crested Cormorants (Phalacrocorax auritus) on Invasive European Fire Ants (Myrmica rubra) [PDF]

, 2018
Nesting of Double-crested Cormorants (Phalacrocorax auritus) in western Lake Ontario is associated with reduced abundance and nest density of European Fire Ants (Myrmica rubra). The impact on fire ants may be substrate related.
Rudmik, Kristi, Kristi Rudmik, Fraser, Gail S, Gupta, Aditi, Fraser, Gail S., Aditi Gupta, Gail S. Fraser   +6 more
core   +1 more source

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

Growth rates of Thuja occidentalis in an ecosystem altered by the double-crested cormorant, Phalacrocorax auritus.

, 2005
Double-crested cormorants, Phalacrocorax auritus, have been shown to have drastic effects on the vegetation in their nesting and roosting sites. In this study I examined how large depositions of cormorant guano affected the growth rates of Northern white-
Wilkinson, Lauren J.
core   +7 more sources

Changes in heron and egret populations on the Laurentian Great Lakes and connecting channels, 1977-2009

Avian Conservation and Ecology, 2015
Canadian and U.S. federal wildlife agencies completed four decadal surveys, spanning the years 1977 to 2009, to census colonial waterbirds breeding on the Great Lakes and adjoining bodies of water.
Scott A. Rush, Cynthia Pekarik, D.V. Weseloh, Francesca Cuthbert, David Moore, Linda Wires   +5 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

Presencia y abundancia de aves de la Isla Farallón de San Ignacio, Sinaloa

Huitzil, 2015
Para determinar la presencia y abundancia de aves que utilizan la isla Farallón de San Ignacio, Sinaloa, documentamos las aves observadas durante 46 visitas de cinco días a la isla entre 2003 y 2008. Registramos 57 especies de aves.
Miguel Angel Guevara Medina, José Alfredo Castillo Guerrero, Marco Antonio González Bernal   +2 more
doaj   +1 more source

Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba

Avian Conservation and Ecology, 2021
Management of colonial waterbirds at regional, national, and continental scales requires up-to-date monitoring information on breeding locations, population sizes, and trends.
Ann E. McKellar, Steven E. Simpson, Scott Wilson   +2 more
doaj  

Refinement of Biomarker Pentosidine Methodology for use on Aging Birds

Human-Wildlife Interactions, 2017
There is no reliable method for determining age for most species of long-lived birds. Recent success using the skin chemical pentosidine as a biomarker has shown promise as an aging tool for birds.
Crissa K. Cooey, Jesse A. Fallon, Michael L. Avery, James T. Anderson, Elizabeth A. Falkenstein, Hillar Klandorf   +5 more
doaj   +1 more source