Double-crested Cormorant (Phalacrocorax auritus) Science Article 6 abstract Outbreaks of morbidity and mortality in double-crested cormorants (Phalacrocorax auritus) along Florida’s Gulf Coast have occurred sporadically for at least 30 yr. During these outbreaks, the Clinic for the Rehabilitation of Wildlife, located on Sanibel Island in Florida, has admitted a substantial number of cormorants with consistent […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 11 abstract Much is made of the many non-market values contributed by wildlife and the many forms of wildlife dependent recreation. However, sometimes lost in the discussion of wildlife values and the importance of wildlife are the market and non-market costs resulting from wildlife damages to human enterprises. Often […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 13 abstract For many years the Double-crested Cormorant (Phalacrocorax auritus) has been suspectedof nesting in South Carolina. Wayne (Birds of South Carolina, 1910, p. 12) saw Double-crested Cormorants on the coast during the summer, and he believed that they bred, WILLIAM POST and COLIN A. POST, The Chat Vol. […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 3 abstract Diving endotherms inhabiting polar regions face potentially high thermoregulatory costs. Unless properly insulated, these animals will lose vast amounts of heat when diving in cold water, which has to be balanced by heat production. Heat generated as a by-product of digestion (heat increment of feeding, HIF) or […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 15 abstract The ability to determine the age of birds accurately from their skeletons would be useful not only for population biology and wildlife management research but for avian palaeontological and archaeological analyses as well. While accurate osteologically based age determination techniques are available for some amphibians and reptiles […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 16 abstract Double-crested Cormorants (Phalacmcorax avril us) are normally considered a diurnal species. Herewe describe cormorants foraging nocturnally in an oxbow lake in Mississippi. We have observed this behavior onlyonce during 30 capture attempts over seven years. D. Tommy King, J. Brent Harrf, Brian Dorr and David Reinhoid, Colonial […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 9 abstract Kleptoparasitism, or the stealing of resources, has been observed within and betweenmany bird species (Brockmann and Barnard 1979, Furness and Monaghan 1987).Although the kleptoparasite sometimes steals food without aggression towards the host,the host may be threatened or even attacked (Brockmann and Barnard 1979). In thisnote, I report […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 12 abstract During the summer of 1998, the New York State Department of Environmental Conservation (NYSDEC) and the United States Geological Survey (USGS) conducted 11 studies designed to evaluate the impact of double-crested cormorant predation on smallmouth bass and other fish populations in the New York waters of the […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 2 abstract In the early 1970s, censuses of Double-crested Cormorants Phalacrocorax auritus albociliatus on Isla Alcatraz in the Gulf of California suggested that Isla Alcatraz was one of the largest Double-crested Cormorant nesting colonies in the Gulf. To update information on the size of the colony, we counted active […]

Double-crested Cormorant (Phalacrocorax auritus) Science Article 14 abstract The Double-crested Cormorant (Phalacrocorax auritus) is a common inhabitant of most water bodies in Florida (Hatch and Weseloh 1999). Cormorants are primarily piscivorous(Nettleship and Duffy 1995). While most studies have examined the impact of cormorant predation on fish, other prey items noted include crayfish and salamanders (Derby […]