000K utf8 1100 $c2002 1500 ger 2050 urn:nbn:de:gbv:8-diss-5023 3000 Hennicke, Janos 4000 Variabilität im Jagdverhalten des Humboldtpinguins (Spheniscus humboldti) unter verschiedenen ozeanographischen Bedingungen$hChristian-Albrechts-Universität zu Kiel [Hennicke, Janos] 4030 Kiel$nChristian-Albrechts-Universität zu Kiel 4209 This study deals with the adjustment of behaviour to environmental conditions and the extent to which these adaptations affect an animal's fitness. The adjustments by Humboldt Penguins (Spheniscus humboldti) to different oceanographic conditions and the consequences of the behaviour for reproduction were investigated. During the austral summer breeding seasons 1997/98 and 1998/99 data on foraging effort, foraging success, and reproductive success were collected at two penguin breeding colonies in Chile. Data on oceanographic conditions were compiled from several sources. The effects of the strong El Niño 1997/98 were given particular attention. The results showed that Humboldt Penguins mainly adjust the horizontal components of their foraging behaviour, particularly foraging trip duration, according to prey availability. It is hypothesised that the highly variable environment puts a selection pressure on the variability of horizontal components of the foraging behaviour, and that the Humboldt Penguin adjusts foraging trip duration according to prey availability balancing proximate with lifetime reproductive success. 4950 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-5023$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/diss_mods_00000502 5051 590 5550 Anpassung 5550 Beutefang 5550 diving behaviour 5550 ecophysi 5550 El Niño 5550 foraging ecology 5550 Fortpflanzungsverhalten 5550 Humboldt Penguin 5550 Humboldtpinguin 5550 Meer 5550 oceanography 5550 Spheniscus humboldti 5550 time-depth-recorder