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Crisan A.,Romanian Lepidopterological Society | Sitar C.,Romanian Lepidopterological Society | Sitar C.,Babes - Bolyai University | Craioveanu M.C.,Romanian Lepidopterological Society | And 4 more authors.
North-Western Journal of Zoology | Year: 2014

Pseudophilotes bavius hungarica is an endemic butterfly subspecies with high conservation value from Transylvania, yet its populations have not been consistently analysed. We assessed two fragments of a population of P. bavius hungarica from a botanical natural reserve and its surroundings with Mark-Release-Recapture method in the years 2004-2006, 2010-2012. The area considered to harbor one of the strongest populations known in Romania. Our study shows a fragmentation of the population and a tendency to decline in the number of individuals over the last 8 years as a result of abandonment of traditional management practices. The short lifespan (3 days) and low mobility (30 meters per day) of this butterfly negatively influences its dispersal capacity, which is aggravated by the spread of native and non-native shrubs (at a rate of 40% in 5 years), isolating population fragments. © NwjZ, Oradea, Romania, 2014.

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