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Preliminary evaluation of the characteristics of nocturnal feeding sites of avocets Recurvirostra avosetta, on the Guerande peninsula, western France Caracteristiques des sites dalimentation nocturne des avocettes elegantes Recurvirostra avosetta dans la presquile Guerandaise



Preliminary evaluation of the characteristics of nocturnal feeding sites of avocets Recurvirostra avosetta, on the Guerande peninsula, western France Caracteristiques des sites dalimentation nocturne des avocettes elegantes Recurvirostra avosetta dans la presquile Guerandaise



Alauda 633: 169-178



The Avocet Recurvirostra avocetta has, as apposed to other waders, an activity rhythm that is independent of the tidal rhythm on the Guerande peninsula. (Loire-Atlantique, western France): birds rest during the day, on the Traicts du Croisic intertidal zone, feeding at night in the guerande salt-pans. Here the authors give their first results of a study trying to identify the characteristics of the chosen nocturnal feeding sites of this species. They show that avocets appear to prefer pans with water shallower than 15 cm, but they also avoid dry pans. At the present stage of the study it appears that mudflats (in reservoir pans) and preferred to salt-pans (evaporation pans). A took at the benthic invertebrates of these mudflats shows there to be few species but at a high density, particularly Chironomid larvae This study should allow for the development of a management plan.

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