We completed the annual monitoring of rodents last February. The objective was to know its monthly abundance in four study areas at two different altitudes. We used the "capture-recapture" technique to estimate the index of abundance, seasonal variations and vital areas.
The results indicate that the density of rodents in Corvo may be influenced by the altitude, in general, higher densities were obtained at low altitudes. The highest abundance was observed in November in all areas for both captured species domestic mouse Mus musculus and black rat Rattus rattus.
Based on these first results, we aim to continue the captures at different habitats during the autumn and early winter in 2011, to obtain a sample of the most pronounced variations.
We'll continue to give updates on this work.
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