منابع مشابه
Prey conspicuousness can explain apparent prey selectivity
daughters. However, our finding that α α-males sired their daughters' offspring less frequently than non-daughters' offspring remains highly significant when the analysis is restricted to the 34 offspring known to have been born to non first time mothers (Fisher's exact p = 0.0003). A third alternative explanation for our findings is that father–daughter matings are not avoided, but when they ...
متن کاملSupplemental Data: Prey Conspicuousness Can Explain Apparent Prey Selectivity
Supplemental Experimental Procedures Determination of prey abundance The field study was conducted using a colony of 300 M. myotis roosting in a church at Flawil, eastern Switzerland. The abundance of epigaeic arthropods was measured using pitfall traps (16 cm diameter, 4% formaldehyde, 10 m spacing between the 3 to 5 traps) in four forest and four grassland sites which had been identified as m...
متن کاملConcealed by conspicuousness: distractive prey markings and backgrounds.
High-contrast markings, called distractive or dazzle markings, have been suggested to draw and hold the attention of a viewer, thus hindering detection or recognition of revealing prey characteristics, such as the body outline. We tested this hypothesis in a predation experiment with blue tits (Cyanistes caeruleus) and artificial prey. We also tested whether this idea can be extrapolated to the...
متن کاملPrey Selection of Scandinavian Wolves: Single Large or Several Small?
Research on large predator-prey interactions are often limited to the predators' primary prey, with the potential for prey switching in systems with multiple ungulate species rarely investigated. We evaluated wolf (Canis lupus) prey selection at two different spatial scales, i.e., inter- and intra-territorial, using data from 409 ungulate wolf-kills in an expanding wolf population in Scandinavi...
متن کاملSuccessive Cambia: A Developmental Oddity or an Adaptive Structure?
BACKGROUND Secondary growth by successive cambia is a rare phenomenon in woody plant species. Only few plant species, within different phylogenetic clades, have secondary growth by more than one vascular cambium. Often, these successive cambia are organised concentrically. In the mangrove genus Avicennia however, the successive cambia seem to have a more complex organisation. This study aimed (...
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ژورنال
عنوان ژورنال: Nature
سال: 1968
ISSN: 0028-0836,1476-4687
DOI: 10.1038/217092a0