The status of Large Blues Phengaris population on the locality Labišťata near Přelouč

In 2015, two butterfly species Phengaris teleius and Phengaris nausithous from the family Lycaenidae (Lycaenidae) were studied to obtain the basic knowledge of their occurrences in the Labišťata area, Přelouč. The hypothesis was formulated: The population size of Phengaris butterflies at Labišťata area is same as the population of the nearly locality Slavíkovy ostrovy. To obtain required data the capture - recapture method was used. Subsequently, the population sizes of investigated species were estimated using MARK Sowtware. At all fields of Labišťata area, there were totally identified 139 individuals of P. teleius (Bergsträsser, 1779) and 135 individuals of P. nausithous (Bergsträsser, 1779). The population estimations were then calculated as 224 resp 294 butterflies. In comparison with Slavíkovy ostrovy (with the estimated population 5 105 individuals of P. teleius and 1 045 individuals of P.nausithous), the populations of both species at studied locality were significantly lower. Therefore, we disapproved the hypothesis