نتایج جستجو برای: great cormorant
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Cormorants are water birds that forage by submerged swimming in search and pursuit of fish. Underwater they swim by paddling with both feet simultaneously in a gait that includes long glides between consecutive strokes. At shallow swimming depths the birds are highly buoyant as a consequence of their aerial lifestyle. To counter this buoyancy cormorants swim underwater with their body at an ang...
The south Atlantic coast supports one of the highest assemblages non-breeding double-crested cormorants ( Nannopterum auritum ) known and is a convergence area for menhaden Brevoortia tyrannus during winter months. We surveyed along North Carolina used bioenergetics approach to estimate potential consumption. estimated cormorant numbers using network repeatable aerial transects outer (366 km) w...
Of the 6 cormorant species that inhabit the North Pacific, the Pelagic Cormorant (Phalocrocorax pelagicus) is the smallest and most widely distributed (Hobson 1997). Pelagic Cormorants breed from Baja California in the eastern Pacific north to the Bering and Chukchi Seas, and south across the western Pacific to southern China. North America supports an estimated one-third of the global populati...
Abstract The aptly named microcormorants (currently placed in the genus Microcarbo) form a morphologically diminutive and distinct clade sister to all other living cormorants shags. However, relationships within Microcarbo are largely speculative. Sequence data resolve these unambiguously, with our phylogeny suggesting that separated from ~16 Mya showing two African species [the reed (or long-t...
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