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Full-Text Articles in Life Sciences
Summer And Migrational Movements Of Satellite-Marked Doublecrested Cormorants From A Breeding Colony Managed By Egg-Oiling In Lake Ontario, Usa, Brian S. Dorr, Jimmy D. Taylor Ii, Scott J. Werner, D. Tommy King, James F. Farquhar, Irene M. Mazzocchi, Russell D. Mccullough
Summer And Migrational Movements Of Satellite-Marked Doublecrested Cormorants From A Breeding Colony Managed By Egg-Oiling In Lake Ontario, Usa, Brian S. Dorr, Jimmy D. Taylor Ii, Scott J. Werner, D. Tommy King, James F. Farquhar, Irene M. Mazzocchi, Russell D. Mccullough
USDA Wildlife Services: Staff Publications
A two-year satellite telemetry study was initiated in May 2000 at a Double-crested Cormorant (Phalacrocorax auritus) breeding colony on Little Galloo Island (LGI) in eastern Lake Ontario, New York, USA, which is managed by egg-oiling. The objective was to describe cormorant (N = 26/year) movements, specifically during the period of reproductive management by egg-oiling and seasonally (breeding, migration and wintering). Egg-oiling at two-week intervals resulted in a hatch success on LGI of 5.7% for 2000 and 2001, combined. The majority (97%) of core use areas of marked cormorants contained LGI throughout three egg-oiling treatments (six weeks), and 71% …
The Direction Of Research And Management Of Double-Crested Cormorants Heading Into The 2000s: Symposium Overview And Future Information Needs, Brian S. Dorr, Christopher Somers
The Direction Of Research And Management Of Double-Crested Cormorants Heading Into The 2000s: Symposium Overview And Future Information Needs, Brian S. Dorr, Christopher Somers
USDA Wildlife Services: Staff Publications
An overview is provided of a symposium on the direction of research and management of Doublecrested Cormorants (Phalacrocorax auritus) heading into the 2000s. The current symposium built on previous efforts and described a number of focus areas of informational need, including cormorant impacts on natural resources, demographics of cormorants, assessment of control efforts, assessment of fish consumption and bioenergetics, and cormorant spatial ecology and influences on movements. The cormorant symposium highlighted a shift in research focus relative to earlier symposia, from evaluating potential impacts on commercial and natural resources to evaluating management actions in attaining desired goals. In …
Winter And Summer Home Ranges And Core Use Areas Of Double-Crested Cormorants Captured Near Aquaculture Facilities In The Southeastern United States, D. Tommy King, Bronson K. Strickland, Andrew A. Radomski
Winter And Summer Home Ranges And Core Use Areas Of Double-Crested Cormorants Captured Near Aquaculture Facilities In The Southeastern United States, D. Tommy King, Bronson K. Strickland, Andrew A. Radomski
USDA Wildlife Services: Staff Publications
Numbers of Double-crested Cormorants (Phalacrocorax auritus) wintering in the southeastern United States have increased dramatically during the last 30 years concomitant with the rise of the aquaculture industry in this region. These cormorants commonly foraged at commercial aquaculture facilities and thereby came into conflict with farmers. Various interest groups are seeking ecologically sound strategies for minimizing the effects of burgeoning cormorant populations. Therefore, this study was conducted to estimate winter and summer home ranges of cormorants captured in the southeastern U.S. and determine whether age class, body mass, density of aquaculture facilities and availability of roost sites influenced …
Migration Patterns Of Double-Crested Cormorants Wintering In The Southeastern United States, D. Tommy King, Bronson K. Strickland, Andrew Radomski
Migration Patterns Of Double-Crested Cormorants Wintering In The Southeastern United States, D. Tommy King, Bronson K. Strickland, Andrew Radomski
USDA Wildlife Services: Staff Publications
Migration patterns of Double-crested Cormorants (Phalacrocorax auritus) wintering in the southeastern U.S. are poorly understood. Movement data were analyzed from 28 cormorants captured in Alabama, Arkansas, Louisiana and Mississippi and equipped with satellite transmitters. Four (three immature, one adult) cormorants did not migrate and stayed in the southeastern U.S. throughout the year. During spring, cormorants captured in Alabama migrated east of the Mississippi River and primarily west of the Appalachian Mountains. Cormorants from Arkansas, Louisiana and Mississippi migrated north along the Mississippi River Valley, the Missouri River Valley and/or the Ohio River Valley. The earliest departure for spring …
Mitigation Of Double-Crested Cormorant Impacts On Lake Ontario: From Planning And Practice To Product Delivery, James F. Farquhar, Irene M. Mazzocchi, Russell D. Mccullough, Richard B. Chipman, Travis L. Devault
Mitigation Of Double-Crested Cormorant Impacts On Lake Ontario: From Planning And Practice To Product Delivery, James F. Farquhar, Irene M. Mazzocchi, Russell D. Mccullough, Richard B. Chipman, Travis L. Devault
USDA Wildlife Services: Staff Publications
The New York State Department of Environmental Conservation initiated a Double-crested Cormorant (Phalacrocorax auritus) control program in the eastern basin of Lake Ontario to mitigate cormorant impacts in 1999. Key objectives included improving the quality of Smallmouth Bass (Micropterus dolomieu) and other fisheries, restoring the structure and function of the warmwater fish community and reducing cormorant impacts to nesting habitats of other colonial waterbird species. In eight years of intensive control, cormorant numbers declined, with a corresponding reduction in estimated fish consumption. Diversity and numbers of co-occurring waterbirds either increased or have not been shown to …