60 research outputs found
Long-term changes in diet and trophic niche of the European wildcat (Felis silvestris silvestris) in Italy
No full textPrevious studies on the feeding habits of the European wildcat (Felis silvestris silvestris) have shown high variability in the diet and in the degree of trophic specialisation of this felid. In order to update and improve the knowledge about the feeding habits of this carnivore, its diet and trophic niche in Italy were examined based on the material collected in 1996–2003 and compared with data obtained in 1968–1987 and with those from literature concerning other European areas. The present study pointed out that in Italy, the European wildcat displayed a broad dietary spectrum. Rodents permanently constituted the main food category; however, the most consumed prey shifted from Cricetidae in the past to Muridae more recently. Through time, the felid has changed its main prey and exploited a greater number of food categories reducing the predominant consumption of some of them. These changes involved an increase of the diet diversity resulting in a widening of the trophic niche and an incomplete niche overlap between time periods. Long-term changes in diet and trophic niche of the European wildcat which were found in this study indicate high flexibility of its feeding habits. This was confirmed by a review of the relevant literature on wildcat diet in Europe, which highlights the ability of this felid to either specialise on different main food items or to widen its feeding spectrum depending on the availability of prey
Analisi biomolecolare e indici di presenza indiretta: uno strumento utile al riconoscimento specie-specifico di Mustelidi.
No full textMartes foina cytochrome b (cytb) gene, partial cds
No full textNCBI, , Pubblicazione sequenza in banca dati, AY97158
Riconoscimento specie-specifico di Mustelidi mediante analisi biomolecolare applicata a indici di presenza indiretta - 66° Congresso Nazionale U.Z.I.
No full textRhythmic motor behaviour influences perception of visual time
No full textTemporal processing is fundamental for an accurate synchronization between motor behaviour and sensory processing. Here, we investigate how motor timing during rhythmic tapping influences perception of visual time. Participants listen to a sequence of four auditory tones played at 1 Hz and continue the sequence (without auditory stimulation) by tapping four times with their finger. During finger tapping, they are presented with an empty visual interval and are asked to judge its length compared to a previously internalized interval of 150ms. The visual temporal estimates show non-monotonic changes locked to the finger tapping: perceived time is maximally expanded at halftime between the two consecutive finger taps, and maximally compressed near tap onsets. Importantly, the temporal dynamics of the perceptual time distortion scales linearly with the timing of the motor tapping, with maximal expansion always being anchored to the centre of the inter-tap interval. These results reveal an intrinsic coupling between distortion of perceptual time and production of self-timed motor rhythms, suggesting the existence of a timing mechanism that keeps perception and action accurately synchronized
On a nonstationary discrete time infinite horizon growth model with uncertainty
No full textsummary:In this paper we examine a nonstationary discrete time, infinite horizon growth model with uncertainty. Under very general hypotheses on the data of the model, we establish the existence of an optimal program and we show that the values of the finite horizon problems tend to that of the infinite horizon as the end of the planning period approaches infinity. Finally we derive a transversality condition for optimality which does not involve dual variables (prices)
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