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Ferenc Kassai (HNHM, Hungary)
Ferenc Kassai is studying the population
structure of all Maculinea species using the capture-recapture
method. Based on this method several aspects of population dynamics,
density and movement patterns are being explored. His research is focusing
on the comparison of populations at different sites and of different
species and the evaluation of external factors (e.g. weather conditions,
habitat attributes) on survival, recruitment and mobility.
He is also exploring methodological problems, such as the handling
effect, establishing methods that require less sampling.
Ádám Kőrösi (HNHM, Hungary)
Maculinea sp.
are among the most endangered butterflies of Europe. Their long-term
survival is only possible in a metapopulation structure, therefore the
knowledge on their dispersal characteristics is essential. Adam primarily
aims to describe and analyse the movement patterns of individuals and
populations. Quantitative analysis of movement patterns will be described
by using estimators of random walk models. In order to find perfect models
describing movement patterns within and between habitat patches of each
species field data is being gathered and analysed (individual
mark-release-recapture and tracking of individual paths).
Martin Musche (UFZ, Germany)
The initial host plant and the host ant
are the two main resources necessary for the completion of the
Maculinea life cycle. Martin Musche is focusing on the role of the
host plant at different levels. His study system is the butterfly
Maculinea nausithous, its host plant Sanguisorba officinalis
and its host ant Myrmica rubra.
At the level of the individual butterfly he is interested in the
cues (ant or plant-related) which M. nausithous females use to
choose an optimal oviposition site. A field experiment was conducted to
explore this topic. The main part of his research investigates the
relationship between host plants and butterfly densities at the
metapopulation level. A field survey in the Upper Rhine Valley in Germany
was conducted to answer the following questions:
i) What are the key factors determining the
density of M. nausithous (host plant density, - distribution or
host ant density)?
ii)Does host plant quality (flower- and seed
quality) of S. officinalis affect the persistence of M.
nausithous populations?
iii)Are there any relationships between host
plant quality and the genetic population structure of the plant or habitat
quality?
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