Within-patch mobility and flight morphology reflect resource use and dispersal potential in the dryad butterfly Minois dryas

Konrad Kalarus , Piotr Skórka , Wiktor Halecki , Agata Jirak , Joanna Kajzer-Bonk , Piotr Nowicki

Abstract

Knowledge of mobility is essential for understanding animal habitat use and dispersal potential, especially in the case of species occurring in fragmented habitats. We compared within-patch movement distances, turning angles, resting times, and flight-related morphological traits in the locally endangered butterfly, the dryad (Minois dryas), between its old populations occupying xerothermic grasslands and newly established ones in wet meadows. We expected that the latter group should be more mobile. Individuals living in both habitat types did not differ in their body mass and size, but those from xerothermic grasslands had wider thoraxes and longer wings, thus lower wing loading index (defined as body mass to wing length ratio). The majority of movements were short and did not exceed 10 m. Movement distances were significantly larger in males. However, there was no direct effect of habitat type on movement distances. Our results suggest that the dryads from xerothermic grasslands have better flight capabilities, whereas those from wet meadows are likely to invest more in reproduction. This implies that mobility is shaped by resource availability rather than by recent evolutionary history. Lower female mobility may have negative implications for the metapopulation persistence because only mated females are able to (re)colonise vacant habitat patches efficiently. Conservation efforts should thus be focused on maintaining large habitat patches that prevent stochastic local extinctions. Furthermore, the recommendation of promoting the exchange of individuals among patches through improving matrix permeability, as well as assisted reintroductions of the species into suitable vacant habitats should also improve its conservation.
Author Konrad Kalarus
Konrad Kalarus,,
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, Piotr Skórka
Piotr Skórka,,
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, Wiktor Halecki (FoEEaLS / DoLRaED)
Wiktor Halecki,,
- Department of Land Reclamation and Environmental Development
, Agata Jirak
Agata Jirak,,
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, Joanna Kajzer-Bonk
Joanna Kajzer-Bonk,,
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, Piotr Nowicki
Piotr Nowicki,,
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Journal seriesJournal of Insect Conservation, ISSN 1366-638X, (A 35 pkt)
Issue year2013
Vol17
Pages1221-1228
Publication size in sheets0.5
Keywords in EnglishEndangered species, Metapopulation, Morphometric measurements, Mosaic landscape, Phenotypic plasticity
ASJC Classification1103 Animal Science and Zoology; 1109 Insect Science; 2303 Ecology; 2309 Nature and Landscape Conservation
DOIDOI:10.1007/s10841-013-9603-7
URL http://link.springer.com/content/pdf/10.1007%2Fs10841-013-9603-7.pdf
Internal identifierWIŚIG/2013/202
Languageen angielski
Score (nominal)35
Score sourcejournalList
Publication indicators WoS Citations = 9; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.058; WoS Impact Factor: 2013 = 1.789 (2) - 2013=1.945 (5)
Citation count*5 (2016-05-26)
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