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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/45132
Title: Inter-insular variation of the diet of osprey Pandion haliaetus in the Canarian archipelago
Authors: Siverio, Manuel; Rodríguez, Beneharo; Rodríguez, Airam ; Siverio, Felipe
Keywords: Canary Islands
direct observations
Pandion haliaetus
prey remains
Issue Date: 2011
Publisher: Nordic Council for Wildlife Research
Citation: Wildl. Biol. 17: 240-247 (2011)
Abstract: We studied the diet of the osprey Pandion haliaetus in the Canary Islands during 1997-2008 using prey remains under perches and nests, and direct observations. We collected data both in breeding territories and in non-breeding areas. We counted a minimum of 307 fish individuals as prey remains (both during breeding and non-breeding seasons), and identified another 78 during 433 hours of field observations. According to our results, ospreys consumed at least 15 taxa belonging to 12 families. We found slight differences in the spatial (both intra and inter insular) and temporal diet composition. During the breeding season, the main prey species were flying fishes (belonging to the family Exocoetidae) and needlefishes (belonging to the family Belonidae) according to the two employed methods (i.e. prey remains and direct observations). In the non-breeding period, the diet was composed primarily of non-autochthones freshwater fishes such as common carp Cyprinus carpio and goldfish Carassius auratus. In general, the diet diversity was similar to the diversity reported in other breeding populations of subtropical areas, and being less diverse than those of tropical areas. More precise studies evaluating the effect of fish availability in marine reserves, overfishing areas or fish farms on the demographic parameters are necessary for the management and conservation of threatened Canarian ospreys
Publisher version (URL): http://dx.doi.org/10.2981/10-004
URI: http://hdl.handle.net/10261/45132
DOI: 10.2981/10-004
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