170 research outputs found
Data from: Study "Eurasian teal, Giunchi, Italy"
No full textThis data file is published by the Movebank Data Repository (www.datarepository.movebank.org). As of the time of publication, a version of this published animal tracking dataset can be viewed on Movebank (www.movebank.org) in the study "Eurasian teal, Giunchi, Italy" (Movebank Study ID 14512695). Individual attributes in the data files are defined below, in the NERC Vocabulary Server at http://vocab.nerc.ac.uk/collection/MVB and in the Movebank Attribute Dictionary at www.movebank.org/cms/movebank-content/movebank-attribute-dictionary. Metadata describing this data package are maintained at https://datacite.org
La vocalità dell’occhione (Burhinus oedicnemus): conoscenze attuali e nuove prospettive
No full textThe vocal repertoire by the Stone-curlew is broad and complex. Recent studies have shown that some adult calls are used in well-defined circumstances (e.g. in sexual or anti-predatory context), which suggests that they have specialized functions. The meaning of other calls is still unknown, but most of them are always used in non-random combination with the most typical vocalizations (gallop and kurlee call), suggesting the existence of a vocal syntax. The two typical chick calls were quantitatively described only recently; they develop well before hatching and remain almost structurally unchanged until fledging. Preliminary data on the vocal ontogeny indicate that near fledging young stone curlews undergo a process of voice breaking, consisting in the sudden emergence of new call types, which differ from the chick’s ones, while tending to take on the characteristics of adult vocalizations. In this period both chick calls and attempts to vocalize as adults coexist. The study of chick vocalizations and of the vocal relationships between parent and offspring can provide interesting insights on the presence and possibly on the mechanisms of parental recognition in this species. Future developments of bioacoustic researches on the Stone-curlew are further discussed
Uso di gps logger per descrivere il comportamento spaziale dell’occhione (Burhinus oedicnemus) in periodo riproduttivo: risultati preliminari
No full textIn this paper we evaluate the effectiveness of GPS data loggers to study the spatial behaviour of the Stone-curlew during the breeding period. Two females were tagged in the Taro River Regional Park (Parma, Italy) in the autumn 2013 and were followed during the next breeding season. The birds reacted well to tagging and for both some breeding attempts were recorded and at least one resulted successful, as proved by the observation of one 7-10-days old chick in July 2014. Regarding the spatial behaviour, the pattern observed was roughly comparable to what was recorded for the same study area using VHF tracking. The high number of recorded data, however, allowed to carry out a more detailed analysis of the behaviour of the animals, resulting in the identification of a series of behavioural changes during the reproductive season apparently not directly related to different phases of the breeding activity. The available data illustrate the great potential of the GPS tracking method, which has to be considered of extreme importance to plan effective conservation actions for the specie
Il ritorno dell’occhione (Burhinus oedicnemus) nel medio corso del fiume Piave
No full textIn the Piave River the Stone-curlew was considered extinct as breeder by the beginning of XX century. In recent years the species was detected again in Treviso province and the number of recorded breeding pairs showed a clearly positive trend. The breeding population estimated by means of binomial counts consisted of > 60 individuals in 2014. The available results underline the importance of the Piave River for the conservation of the species in the region and for understanding the process of re-colonization of the area
Initial orientation of sand martins (Riparia riparia): evidence of an influence of PCD-like biasing factors
No full textL’occhione (Burhinus oedicnemus) nel Parco Nazionale dell’Alta Murgia: effetti della struttura di vegetazione e dell’uso del suolo sull’abbondanza della specie
No full textThe density of the Stone-curlew in the Alta Murgia National Park during the breeding season 2013. The estimated density was equal to 11 ind/Km2, with a minimum number of individuals between 164 and 172. The values of abundance of the species appear to be adversely affected by the height of the sward that is found mainly in the arable land with cereals, in pseudosteppe and uncultivated land, while in arable leguminous this parameter seems to affect positively the values of abundance. Currently one of the factors of threat are to be highlighted in the changes of land use, from arable crops to irrigated tree crops
Le popolazioni urbane di colombo: considerazioni sulla loro genesi e sulle metodologie di gestione
No full textOrientation experiments with displaced juvenile barn swallows (Hirundo rustica) during autumn migratory season
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