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Université de Fribourg

Surviving in the BRICS: the struggle of South African business in coping with new partners and investors

Wenzel, Nadine ; Freund, Bill ; Graefe, Olivier

In: International Review of Applied Economics, 2019, vol. 33, no. 1, p. 51–70

The purpose of this paper is to improve our understanding of how South African economic actors react to the gradual entry of non-South African BRICS firms in their established business areas. Throughout the twentieth century, South Africa’s trade and investment activities were conducted overwhelmingly with Western countries. However, the end of apartheid coincided with significant shifts as...

Université de Fribourg

Link prediction in bipartite nested networks

Medo, Matúš ; Mariani, Manuel Sebastian ; Lü, Linyuan

In: Entropy, 2018, vol. 20, no. 10, p. 777

Real networks typically studied in various research fields—ecology and economic complexity, for example—often exhibit a nested topology, which means that the neighborhoods of high-degree nodes tend to include the neighborhoods of low-degree nodes. Focusing on nested networks, we study the problem of link prediction in complex networks, which aims at identifying likely candidates for...

Haute école de gestion de Genève

How could Tippytea penetrate the organic, sustainable and premium Swiss tea market?

Culebras Almeida, Ana ; Mugione, Fiorina (Dir.)

Mémoire de bachelor : Haute école de gestion de Genève, 2018 ; TDIBM 34.

The research’s goal is to provide insights about tea market opportunities in Switzerland, and to analyse how a Small and Medium-Sized Enterprise (SMEs) from Ecuador can deal with the export process for the first time and build up a business strategy to enter a new market. The report analysed the different barriers such as, the poor infrastructure, lack of access to new technologies and...

Université de Neuchâtel

Oxidative stress as a life history constraint : pespectives from a bat species with alternative reproductive tactics

Meniri, Magali ; Helfenstein, Fabrice (Dir.) ; Fasel, Nicolas (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Au cours de cette thèse, j’ai étudié le rôle du stress oxydant en tant que contrainte pour les traits d’histoire de vie, en utilisant les chauves-souris Fer de lance à lunettes (Carollia perspicillata) comme modèle d’étude. Chez cette espèce, les mâles présentent trois tactiques de reproduction alternatives qui ont des succès reproducteurs différents, et dont...

Université de Fribourg

Progressively excluding mammals of different body size affects community and trait structure of ground beetles

Wang, Xiaowei ; Steiner, Magdalena ; Schütz, Martin ; Vandegehuchte, Martijn L. ; Risch, Anita C.

In: Oikos, 2018, vol. 127, no. 10, p. 1515–1525

Mammalian grazing induces changes in vegetation properties in grasslands, which can affect a wide variety of other animals including many arthropods. However, the impacts may depend on the type and body size of these mammals. Furthermore, how mammals influence functional trait syndromes of arthropod communities is not well known. We progressively excluded large (e.g. red deer, chamois),...

Université de Fribourg

An inversion supergene in Drosophila underpins latitudinal clines in survival traits

Durmaz, Esra ; Benson, Clare ; Kapun, Martin ; Schmidt, Paul ; Flatt, Thomas

In: Journal of Evolutionary Biology, 2018, vol. 31, no. 9, p. 1354–1364

Chromosomal inversions often contribute to local adaptation across latitudinal clines, but the underlying selective mechanisms remain poorly understood. We and others have previously shown that a clinal inversion polymorphism in Drosophila melanogaster, In(3R)Payne, underpins body size clines along the North American and Australian east coasts. Here, we ask whether this polymorphism also...

Université de Fribourg

Horizons in the evolution of aging

Flatt, Thomas ; Partridge, Linda

In: BMC Biology, 2018, vol. 16, no. 1, p. 93

Between the 1930s and 50s, evolutionary biologists developed a successful theory of why organisms age, firmly rooted in population genetic principles. By the 1980s the evolution of aging had a secure experimental basis. Since the force of selection declines with age, aging evolves due to mutation accumulation or a benefit to fitness early in life. Here we review major insights and challenges...

Université de Fribourg

A local risk map using field observations of the Asian longhorned beetle to optimize monitoring activities

Fragnière, Yann ; Forster, B. ; Hölling, D. ; Wermelinger, B. ; Bacher, Sven

In: Journal of Applied Entomology, 2018, vol. 142, no. 6, p. 578–588

The Asian longhorned beetle Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae) is one of the most dangerous xylophagous pests affecting broadleaf trees in the world. Eradication programmes are undertaken in non-native regions, requiring extensive resources and involving high costs. An adapted strategy must be set up to optimize the ratio cost/probability of success. We...

Université de Fribourg

Developing a framework of minimum standards for the risk assessment of alien species

Roy, Helen E. ; Rabitsch, Wolfgang ; Scalera, Riccardo ; Stewart, Alan ; Gallardo, Belinda ; Genovesi, Piero ; Essl, Franz ; Adriaens, Tim ; Bacher, Sven ; Booy, Olaf ; Branquart, Etienne ; Brunel, Sarah ; Copp, Gordon Howard ; Dean, Hannah ; D?hondt, Bram ; Josefsson, Melanie ; Kenis, Marc ; Kettunen, Marianne ; Linnamagi, Merike ; Lucy, Frances ; Martinou, Angeliki ; Moore, Niall ; Nentwig, Wolfgang ; Nieto, Ana ; Pergl, Jan ; Peyton, Jodey ; Roques, Alain ; Schindler, Stefan ; Schönrogge, Karsten ; Solarz, Wojciech ; Stebbing, Paul D. ; Trichkova, Teodora ; Vanderhoeven, Sonia ; Valkenburg, Johan van ; Zenetos, Argyro

In: Journal of Applied Ecology, 2018, vol. 55, no. 2, p. 526–538

Biological invasions are a threat to biodiversity, society and the economy. There is an urgent need to provide evidence-based assessments of the risks posed by invasive alien species (IAS) to prioritize action. Risk assessments underpin IAS policies in many ways: informing legislation; providing justification of restrictions in trade or consumer activities; prioritizing surveillance and rapid...