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Comparison of population parameters of Large blues from genus Phengaris on multiannual basis
Bártů, Nikola ; Vrabec, Vladimír (advisor) ; Petr, Petr (referee)
There where evaluated the changes in abundance of overall metapopulations and abundace of butterflies on surveyed areas occupied by Phengaris nausithous (Lepidoptera: Lycaenidae). It ran on two long-term monitored locations in the Czech Republic : Slavíkovy ostrovy u Přelouče a Dolní Labe u Děčína. Data for this comparison was obtained by longterm monitoring of the abundance of butterflies on these locations. The method of reverse capture of labeled specimens was used and then statisticall processing of marking results in program MARK. In final number of the target species has been found significant fluctuation , after our evaluation. Abudance of total metapopulation in Přelouč in years from 2004 till 2016is variable from 148 up to 1 369 butterflies, numbers in Děčín between 2008 and 2016 has vacillated from 273 to 1952 individuals. Growth of abudance of metapopulation on these two locations are obvious from crossing both diagrams (in years 2006, 2010-11 and 2014-2015). However, observing time-lime is not so long, this is very strong argument to support this hypothesis: ,,From aged time sequence there is noticable graduation periodicity. Than has been compared progression of population of individual locations compare to metapopulation of both locations together and it has discovered this observation is a real picture of aged progress. Most of places of research copying trend of metapopulation. If there are any differences, for example total metapopulation grows, but population of individual location declines, it could be explain as a change of familiar location related on mamagement, in this case on the wrong one. Contrariwise, rising of individual colony against the trend of metapopulation, mostly shows a positive changes in maintenance of site. Long therm researching is highly recommented for rating of impact of management.
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