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Université de Fribourg

Apex predators decline after an influx of pastoralists in former Central African Republic hunting zones

Aebischer, Thierry ; Ibrahim, Tidjani ; Hickisch, Raffael ; Furrer, Roman D. ; Leuenberger, Christoph ; Wegmann, Daniel

In: Biological Conservation, 2020, vol. 241, p. 108326

Pastoralism is spreading in Central Africa, where many protected areas are under consideration to be opened for grazing, in particular hunting zones. Here we document the loss of biodiversity followed by an influx of transhumant pastoralism into previously uninhabited and virtually pristine habitat in the Central African Republic. Our track count and camera trap surveys of 2012, 2016 and...

Université de Fribourg

Predicting financial extremes based on weighted visual graph of major stock indices

Chen, Dong-Rui ; Liu, Chuang ; Zhang, Yi-Cheng ; Zhang, Zi-Ke

In: Complexity, 2019, vol. 2019, p. 1–17

Understanding and predicting extreme turning points in the financial market, such as financial bubbles and crashes, has attracted much attention in recent years. Experimental observations of the superexponential increase of prices before crashes indicate the predictability of financial extremes. In this study, we aim to forecast extreme events in the stock market using 19-year time-series...

Haute école de gestion de Genève

Is China the new land of football ?

Sliwowski, Nicolas ; Depetris Chauvin, Nicolas (Dir.)

Mémoire de bachelor : Haute école de gestion de Genève, 2017 ; TD IBM 27.

In recent years, China has been in the spotlight for its determination to develop a relatively unexpected industry within its boundaries, football. The idea was introduced by the current President of the People’s Republic of China, Mr Xi Jinping, who intends to turn China into a top football nation. This is rather surprising considering that China has never been successful in football and has...

Université de Fribourg

First quantitative survey delineates the distribution of chimpanzees in the Eastern Central African Republic

Aebischer, Thierry ; Siguindo, Guy ; Rochat, Estelle ; Arandjelovic, Mimi ; Heilman, Amy ; Hickisch, Raffael ; Vigilant, Linda ; Joost, Stéphane ; Wegmann, Daniel

In: Biological Conservation, 2017, vol. 213, no. Part A, p. 84–94

Vast, pristine ecosystems and their biodiversity are vanishing globally at frightening speed, but many large tracts of wilderness have not yet been systematically inventoried and important natural populations of threatened species remain poorly characterized. The forest-savanna ecotone of the Eastern Central African Republic (CAR) is one such poorly studied area. Using camera traps, transect...