caa a22 4500 463176324 CHVBK 20180406164827.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10336-007-0125-5 doi (NATIONALLICENCE)springer-10.1007/s10336-007-0125-5 Effect of fog on the arrival time of little penguins Eudyptula minor [Elektronische Daten] a clue for visual orientation? [André Chiaradia, John McBride, Tanya Murray, Peter Dann] We report a dramatic change in the arrival time of little penguins Eudyptula minor at their breeding colony when a heavy low-level fog was present on the southern beaches of Phillip Island, Australia. On the evening of 21 December 2002, only 5% of penguins arrived at the expected time, and the peak time at arrival that night was 2h behind the peak arrival times of previous and subsequent days. It appears that little penguins were unable or unwilling to return to the colony under the low visibility caused by the fog. Only half (52%) of the average number of penguins returned to the colony on the evening of the fog. We propose two explanations for our observation. First, penguins could have been close to the colony but did not come ashore in conditions of poor visibility to avoid predation. Secondly, the extensive fog may have affected the orientation of the penguins and they were unable to find their way back home. Our results could serve as indirect evidence for both hypotheses. Dt. Ornithologen-Gesellschaft e.V., 2007 Arrival time nationallicence Breeding colony nationallicence Eudyptula minor nationallicence Low-level fog nationallicence Orientation nationallicence Chiaradia André Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut McBride John Bureau of Meteorology Research Centre, GPO Box1289K, 3001, Melbourne, VIC, Australia aut Murray Tanya Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut Dann Peter Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut Journal of Ornithology Springer-Verlag 148/2(2007-04-01), 229-233 0021-8375 148:2<229 2007 148 10336 https://doi.org/10.1007/s10336-007-0125-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10336-007-0125-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chiaradia André Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut NATIONALLICENCE 700 1- McBride John Bureau of Meteorology Research Centre, GPO Box1289K, 3001, Melbourne, VIC, Australia aut NATIONALLICENCE 700 1- Murray Tanya Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut NATIONALLICENCE 700 1- Dann Peter Phillip Island Nature Park, PO Box 97, 3922, Cowes, VIC, Australia aut NATIONALLICENCE 773 0- Journal of Ornithology Springer-Verlag 148/2(2007-04-01), 229-233 0021-8375 148:2<229 2007 148 10336 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer