monitoring winter and summer abundance of cetaceans in the pelagos sanctuary (northwestern mediterranean sea) through aerial surveys监控冬季和夏季大量的鲸类海洋生物保护区(地中海西北部)通过航空调查.pdfVIP

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monitoring winter and summer abundance of cetaceans in the pelagos sanctuary (northwestern mediterranean sea) through aerial surveys监控冬季和夏季大量的鲸类海洋生物保护区(地中海西北部)通过航空调查.pdf

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monitoring winter and summer abundance of cetaceans in the pelagos sanctuary (northwestern mediterranean sea) through aerial surveys监控冬季和夏季大量的鲸类海洋生物保护区(地中海西北部)通过航空调查

Monitoring Winter and Summer Abundance of Cetaceans in the Pelagos Sanctuary (Northwestern Mediterranean Sea) Through Aerial Surveys 1,2 2 3 1 4 Simone Panigada *, Giancarlo Lauriano , Louise Burt , Nino Pierantonio , Greg Donovan 1Tethys Research Institute, Milano, Italy, 2 Institute for Environmental Protection and Research - ISPRA, Roma, Italy, 3 RUWPA, University of St. Andrews, Scotland, United Kingdom, 4 International Whaling Commission, The Red House, Cambridge, United Kingdom Abstract Systematic long-term monitoring of abundance is essential to inform conservation measures and evaluate their effectiveness. To instigate such work in the Pelagos Sanctuary in the Mediterranean, two aerial surveys were conducted in winter and summer 2009. A total of 467 (131 in winter, 336 in summer) sightings of 7 species was made. Sample sizes were sufficient to estimate abundance of fin whales in summer (148; 95% CI = 87–254) and striped dolphins in winter (19,462; 95% CI = 12 939–29 273) and in summer (38 488; 95% CI = 27 447–53 968). Numbers of animals within the Sanctuary are significantly higher in summer, when human activities and thus potential population level impacts are highest. Comparisons with data from past shipboard surveys suggest an appreciable decrease in fin whales within the Sanctuary area and an appreciable increase in striped dolphins. Aerial surveys proved to be more efficient than ship surveys, allowing more robust estimates, with smaller CIs and CVs. These results provide essential baseline data for this marine protected area and continued regular surveys will allow the effectiveness of the MPA in terms of cetacean conservation to be evaluated and inform futur