Modelling population dynamics of the Common hamster (Cricetus cricetus): Timing of harvest as a critical aspect in the conservation of a highly endangered rodent

摘要

The Common hamster Cricetus cricetus was an agricultural pest in large parts of Europe less than 50 years ago. Currently the species is highly threatened or locally extinct and acknowledged as an important and even iconic species for nature conservation in farmland areas in Western Europe. The species was listed in the European habitats directive in 1992 to prevent a further decline, but the Common hamster is still declining in most parts of its European range despite large conservation efforts. Only a few local conservation successes have been reported so far. These disappointing conservation results raise the question: why is it so difficult to conserve this former pest species?