Winter roosts of great cormorant Phalacrocorax carbo sinensis in Campania region: distribution and multiyear analysis of the population, from 1998 to 2022
Abstract
The great cormorants' (Phalacrocorax carbo sinensis) habit of gathering in roosts in winter makes it easier to monitor the wintering populations. In Campania region (Southern Italy) winter roosts have been counted since the 1980s. However,
since January 1998 the monitoring has been standardized and made constant over the years. Therefore, there is a 25-year historical series on which analyzes were carried out on the trend, periodicity, nature of the various roosts monitored in the considered period, and the geographical origins of the wintering specimens. A moderate increasing trend emerged, also confirmed by the comparison of the median number of animals present in the decade 2003-2012 with those of the
decade 2013-2022. No periodicity phenomenon was found.
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