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Nest crypsis, reproductive value of a clutch and escape decisions in incubating female mallards Anas platyrhynchos
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SYSNO ASEP 0101759 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Nest crypsis, reproductive value of a clutch and escape decisions in incubating female mallards Anas platyrhynchos Title Krypse hnízda, reprodukční hodnota snůšky a únikové vzdálenosti inkubujících samic kachny divoké Anas platyrhynchos Author(s) Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Klvaňa, P. (CZ)Source Title Ethology. - : Wiley - ISSN 0179-1613
Roč. 110, č. 8 (2004), s. 603-613Number of pages 11 s. Language eng - English Country DE - Germany Keywords ducks ; behavior ; reproduction Subject RIV EG - Zoology R&D Projects IAA6093403 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IAB6130001 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z6093917 - UBO-W DOI 10.1111/j.1439-0310.2004.00992.x Annotation Escape decisions of incubating parents should be optimized based on the risk-to-parent/cost of escape equilibrium. Animal prey may assess predation risk depending on a variety of cues. We examined interactive effects of nest crypsis and the current reproductive value of a clutch on flushing distances in incubating mallards approached by a human. Flushing distances were inversely correlated with measures of the reproductive value of the current clutch. In addition, individual females tended to increase/decrease flushing distances according to change in nest cover. The results further suggest that vegetation concealment greatly influenced the risk of nest detection by local predators, suggesting that vegetation may act as a protective cover for incubating female. A femaleŽs ability to delay flushes according to the actual vegetation cover might be viewed as an antipredator strategy that reduces premature nest advertising to visually oriented predators. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2005
Number of the records: 1