id:"swepub:oai:lup.lub.lu.se:a52357e9-783b-4590-b175-aa9946602988"
Sökning: id:"swepub:oai:lup.lub.lu.se:a52357e9-783b-4590-b175-aa9946602988" > Reversed sexual dim...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03298naa a2200349 4500 | |
| 001 | oai:lup.lub.lu.se:a52357e9-783b-4590-b175-aa9946602988 | |
| 003 | SwePub | |
| 008 | 160401s2003 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://lup.lub.lu.se/record/1373222 URI |
| 024 | 7 | a https://doi.org/10.1034/j.1600-0706.2003.12203.x2 DOI |
| 040 | a (SwePub)lu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Sunde, Peteru Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science4 aut0 (Swepub:lu)zooe-psu |
| 245 | 1 0 | a Reversed sexual dimorphism in tawny owls, Strix aluco, correlates with duty division in breeding effort |
| 264 | c 2003-04-25 | |
| 264 | 1 | b Wiley,c 2003 |
| 338 | a electronic2 rdacarrier | |
| 520 | a Even though most bird species with a raptorial feeding habit express varying extents of reversed sexual dimorphism (RSD: females bigger than males), the evolutionary basis for its maintenance, as well as its possible secondary consequences for the ecological adaptations of the different sexes, is debated. We studied pairs of tawny owls, Strix aluco (females 20% heavier than males), throughout the year by telemetry to test whether any inter-sexual differences in movement patterns, resource partitioning and breeding effort correlated with RSD. Females were larger than males in all body size measures and were 16% heavier than would be expected from the difference in wing length alone. In accordance with predictions from flight economics, males moved longer distances per time unit than females, in particular during the post-fledging season, when they also fed chicks more often than the females. Males had larger home ranges than females during the post-fledging period, whereas the sexes had home ranges of equal size during the non-breeding season. Until 10 days after fledging, females foraged much closer to the offspring than males, apparently balancing their distance to offspring between the needs of offspring guarding and foraging. In males, the parent-offspring distance only increased with decreasing brood condition. The sexes did not differ in habitat use or feeding habits, rendering no indications of food niche partitioning. The study provides further evidence that selection for males to be light and energetically efficient foragers is the main evolutionary force behind RSD in raptorial birds, even when the prey base is confined by territoriality. | |
| 650 | 7 | a NATURVETENSKAPx Biologix Ekologi0 (SwePub)106112 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Biological Sciencesx Ecology0 (SwePub)106112 hsv//eng |
| 700 | 1 | a Bolstad, M S4 aut |
| 700 | 1 | a Moller, J D4 aut |
| 710 | 2 | a Biologiska institutionenb Naturvetenskapliga fakulteten4 org |
| 773 | 0 | t Oikosd : Wileyg 101:2, s. 265-278q 101:2<265-278x 1600-0706x 0030-1299 |
| 856 | 4 | u https://portal.research.lu.se/files/2912381/624650.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u http://dx.doi.org/10.1034/j.1600-0706.2003.12203.xy FULLTEXT |
| 856 | 4 | u https://lup.lub.lu.se/search/files/2912381/624650.pdf |
| 856 | 4 8 | u https://lup.lub.lu.se/record/137322 |
| 856 | 4 8 | u https://doi.org/10.1034/j.1600-0706.2003.12203.x |
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