Evidence for positive density-dependent emigration in butterfly metapopulations

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F11%3A53158" target="_blank" >RIV/60460709:41210/11:53158 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s00442-011-2025-x" target="_blank" >http://dx.doi.org/10.1007/s00442-011-2025-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00442-011-2025-x" target="_blank" >10.1007/s00442-011-2025-x</a>

Result language
angličtina
Original language name
Evidence for positive density-dependent emigration in butterfly metapopulations
Original language description
A positive effect of (meta)population density on emigration has been predicted by many theoretical models and confirmed empirically in various organisms. However, in butterflies, the most popular species for dispersal studies, the evidence for its existence has so far been equivocal, with negative relationships between density and emigration being reported more frequently. We analysed dispersal in sympatric metapopulations of two Maculinea butterflies, intensively surveyed with mark?release?recapture methods for 7 years. Dispersal parameters, derived using the virtual migration model, were assessed against butterfly densities, which fluctuated strongly over the study period. Emigration was positively correlated with density, and this effect was particularly strong at densities above carrying capacity, when emigration increased up to threefold in females and twofold in males compared with the normal levels. In turn, density had little impact on other dispersal parameters analysed.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
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Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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