PT Unknown
AU Kotzerka, J
TI Identification of foraging behaviour and feeding areas of threeseabird species breeding sympatrically in a highly productive regime, the northern Gulf of Alaska
PY 2012
PU Christian-Albrechts-Universität zu Kiel
WP https://macau.uni-kiel.de/receive/diss_mods_00008067
LA en
DE Alaska; seabirds; foraging; feeding areas; diving behaviour; Pelagic Cormorant; Black-legged Kittiwake; Tufted Puffin; Phalacrocorax pelagicus; Rissa tridactyla; Fratercula cirrhata; Seevögel; Nahrungssuche; Fressgebiete; Tauchverhalten; Pelagischer Kormoran; Dreizehenmöwe; Gelbschopflund
AB The Gulf of Alaska is a highly productive regime and supports several millions of seabirds. But populations fluctuate sharply and reasons for that are not completely understood. However, understanding of how seabirds react to their marine environment is essential in order to assess naturally or human induced changes of their abundances and distributions. This thesis focuses on the at-sea distribution, foraging ecology and diving behaviour of three seabird species breeding sympatrically on Middleton Island in the northern Gulf of Alaska. Pelagic Cormorants (Phalacrocorax pelagicus), Black-legged Kittiwakes (Rissa tridactyla) and Tufted Puffins (Fratercula cirrhata) were studied during three consecutive years using novel data logger technologies like GPS data loggers or time-depth-recorders (TDR’s). The present study provides several completely new aspects of the ecology of these species and indicates how these different seabird species use the marine environment successfully.
PI Kiel
ER