The energy intake of a consumer can theoretically be limited either by the time it has available to forage or by its capacity to process energy. Nolet and Klaassen (2005; termed ‘‘NK’ ’ henceforth) recently provided evidence that Bewick’s swans (Cygnus columbianus bewickii) are time limited during m...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.9537 http://sci.bio.lmu.de/ecology/evol_e/documents/Jeschke_et_al_2006.pdf |
| Summary: | The energy intake of a consumer can theoretically be limited either by the time it has available to forage or by its capacity to process energy. Nolet and Klaassen (2005; termed ‘‘NK’ ’ henceforth) recently provided evidence that Bewick’s swans (Cygnus columbianus bewickii) are time limited during migration when food abundance is low. Based on this finding, they suggested that animals are not always energy-processing limited but can be time limited during demanding phases of the year. We agree with them. However, NK claimed that their finding was surprising because ‘‘the common notion is that also in the field animals are generally energy-processing limited (Jeschke et al. 2002).’ ’ (p. 302 in NK) NK misquoted us at this and similar passages of their text (Abstract, pp. 303, 309), thereby telling an |
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