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Linear tracks and restricted temperature ranges characterise penguin foraging pathways

By Phil N. Trathan, C. Bishop, G. Maclean, P. Brown, Andrew Fleming and Martin Anthony Collins


Marine predators are thought to follow sophisticated scale-dependent search strategies when seeking patchy and unpredictable prey. However, fine-scale information about these strategies has hitherto been difficult to obtain for diving predators that often remain at the sea surface for only limited periods of time. Using ARGOS telemetry and novel, low-powered, archival GPS, we followed the fine-scale at-sea behaviour of king penguins breeding on South Georgia. Results revealed that foraging pathways were generally linear, except at the finest scale, where movements probably reflected either fine-scale searching behaviour, or fine-scale random movements associated with having found prey. King penguins focused 45% of their foraging effort in waters with a specific surface temperature (5.0 to 5.5 degrees C) - an environmental cue potentially important in helping them locate prey, thereby reducing their need to expend energy in area-restricted search patterns. Within these waters, penguins slowed down and increased their dive effort and degree of meandering. First Passage Time analysis revealed that penguins focused much of their effort at local scales, generally in areas with a radius of 2 km. In these areas, penguins dived marginally deeper and targeted waters that, were significantly warmer at the bottom of their dives. Such information about fine-scale foraging behaviour will help increase our understanding of the environmental correlates that characterise areas where marine predators exploit their prey. The scale of these behavioural processes is better resolved using the fine-scale temporal and spatial resolution of GPS tracking data

Topics: Marine Sciences, Zoology, Ecology and Environment, Electronics, Engineering and Technology
Publisher: Inter-Research
Year: 2008
DOI identifier: 10.3354/meps07638
OAI identifier:

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  1. (2007). A compilation of parameters for ecosystem dynamics models of the Scotia Sea–Antarctic Peninsula region.
  2. (1997). Characterization of the Antarctic Polar Frontal Zone to the north of South Georgia in summer doi
  3. (1987). Diving behaviour and performance with special reference to penguins. In: Croxall JP (ed) Seabirds feeding ecology and role in marine ecosystems. Cambridge University Press, Cambridge, p 63–75 Kozlov AN, Shust KV, Zemsky AV
  4. (1997). Long-term attachment of transmitting and recording devices to penguins and other seabirds.
  5. (1999). Soc Lond B Biol Sci 274:2385–2391 Fauchald P
  6. (2002). The Antarctic Circumpolar Current between the Falkland Islands and South Georgia. J Phys Oceanogr 32:1914–1931 Benhamou S doi
  7. (2003). Using first-passage time in the analysis of area-restricted search and habitat selection. Ecology 84:282–288 Fauchald P, Erikstad KE, Skarsfjord H doi

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