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Université de Fribourg

Sampbias, a method for quantifying geographic sampling biases in species distribution data

Zizka, Alexander ; Antonelli, Alexandre ; Silvestro, Daniele

In: Ecography, 2020/n/a/n/a/-

Geo-referenced species occurrences from public databases have become essential to biodiversity research and conservation. However, geographical biases are widely recognized as a factor limiting the usefulness of such data for understanding species diversity and distribution. In particular, differences in sampling intensity across a landscape due to differences in human accessibility are...

Université de Fribourg

The fossil record of the genus Varanus from the Southern Caucasus (Armenia, Georgia)

Vasilyan, Davit ; Bukhsianidze, Maia

In: PeerJ, 2020, p. e8322

The Southern Caucasus, with its special geographic position and complex topography, is a well-known biodiversity hotspot. However, the formation of this hotspot remains largely unstudied. To reveal this, a thorough study of the fossil record of the region is necessary. In the present paper, we describe for the first time fossil monitor lizards (Varanus sp.) from two late Miocene localities from...

Université de Fribourg

A review of the fossil record of nonbaenid turtles of the clade Paracryptodira

Joyce, Walter G. ; Anquetin, Jérémy

In: Bulletin of the Peabody Museum of Natural History, 2019, vol. 60, no. 2, p. 129–155

The fossil record of nonbaenid paracryptodires ranges from the Late Jurassic (Kimmeridgian) to the Paleocene of North America and Europe only. Earlier remains may be present as early as the Middle Jurassic (Bathonian). Only a single dispersal event is documented between the two continents after their breakup during the Cretaceous in the form of the appearance of the Compsemys lineage in the ...

Université de Fribourg

The influence of ant-attendance on aphid behaviour investigated with the electrical penetration graph technique

Rauch, Gisep ; Simon, Jean-Christophe ; Chaubet, Bernard ; Haack, Lucie ; Flatt, Thomas ; Weisser, Wolfgang W.

In: Entomologia Experimentalis et Applicata, 2002, no. 102, p. 13-20

For themutualistic interaction between the aphidMetopeurum fuscoviride Stroyan (Homoptera:Aphididae) and the ant Lasius niger L. (Hymenoptera: Formicidae) it has been shown that ant-tended aphids develop faster, reproduce at a higher rate, and live longer than aphids not tended by ants. We used electrical penetration graphs (EPG) to investigate if behavioural patterns differ between...

Università della Svizzera italiana

Strategic M&A announcement timing, information asymmetry and behavioral biases

Filipovic, Zoran ; Degeorge, François (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2018 ; 2018ECO012.

Mergers and acquisitions (M&As) are among the largest and most important corporate events. Companies acquire other companies for a variety of reasons. The most quoted one is without any doubt the potential additional value from combining two firms, better known as synergy, while the most obscure and the most controversial one is probably the elimination of future competition. No matter what...

Université de Fribourg

Cognitive biases in response to visual body-related stimuli in eating disorders : study protocol for a systematic review and meta-analysis

Schuck, Kathrin ; Munsch, Simone ; Schneider, Silvia

In: Systematic Reviews, 2015, vol. 4, no. 103, p. 2-6

Background: Biased processing of body-related information may be linked to the development and maintenance of eating disorders (ED). The objective of this systematic review will be to examine the occurrence and the extent of cognitive biases in response to visual body-related stimuli in individuals with ED and individuals with an increased risk to develop ED. Methods: Studies will be identified...

Université de Fribourg

Spatiotemporal brain dynamics underlying attentional bias modifications

Sallard, Etienne ; Hartmann, Lea ; Ptak, Radek ; Spierer, Lucas

In: International Journal of Psychophysiology, 2018, vol. 130, p. 29–39

Exaggerated attentional biases toward specific elements of the environment contribute to the maintenance of several psychiatric conditions, such as biases to threatening faces in social anxiety. Although recent literature indicates that attentional bias modification may constitute an effective approach for psychiatric remediation, the underlying neurophysiological mechanisms remain unclear....