USCpres2008 birds - Seabird-fisheries Interactions in South...

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Seabird-fisheries Interactions in South Carolina Lisa Wickliffe USGS SC Cooperative Fish & Wildlife Research Unit Upstate Forever Seabirds Defined as those birds living or making a living in marine environments Equally at home in water, air, and land which requires unique adaptations Great diversity Relative to land birds, seabirds have – Long life (20-60 yrs.) – Deferred maturity (delayed up to 10 yrs.) – Small clutch size – Extended chick-rearing periods (up to 6 months) (Schreiber & Burger 2002) Seabirds • Orders –Pelecaniformes –Charadriiformes –Procellariiformes –Sphenisciformes –Ciconiiformes (excluded) Order 1: Pelecaniformes Found worldwide All have throat pouch (gular) used for catching and storing fish Pelicans, frigatebirds, commerants, Colonial nesting, young are altricial Order 2: Charadriiformes Main focus: – Family Laridae : gulls, terns and skimmers Shorebirds (plovers, snipes, sandpipers, oystercatchers)- excluded Order 3: Procellariiformes Albatrosses, Petrels, Shearwaters Almost exclusively pelagic (feed in open ocean) Show great philopatry Breed on predator free islands 1 egg; monogamous • Vulnerable
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