• Comparison of social complexity in two independent pastoralist societies 

      Du, Juan; Thomas, Matthew; Bårdsen, Bård-Jørgen; Mace, Ruth; Næss, Marius Warg (Peer reviewed; Journal article, 2019)
      Pastoralists rely on networks of cooperating households containing relatives and others to help with production and various other daily activities. To understand how socioecological differences and commonalities affect ...
    • Market Economy vs. Risk Management: How Do Nomadic Pastoralists Respond to Increasing Meat Prices? 

      Næss, Marius Warg; Bårdsen, Bård-Jørgen (Journal article; Peer reviewed, 2015)
      A growing body of evidence shows that for nomadic pastoralists herd accumulation is an efficient strategy for buffering environmental variation and maximizes long-term survival. Pastoralists may thus view livestock as ...
    • The Pursuit of Population Collapses: Long-Term Dynamics of Semi-Domestic Reindeer in Sweden 

      Bårdsen, Bård-Jørgen; Næss, Marius Warg; Singh, Navinder J.; Åhman, Birgitta (Peer reviewed; Journal article, 2017)
      Spatiotemporal reindeer population fluctuations are a result of multiple factors that working in concert affectingthe structure and functioning of many Arctic and Sub-Arctic ecosystems. We investigated the population ...
    • The Pursuit of Population Collapses: Long-Term Dynamics of Semi-Domestic Reindeer in Sweden 

      Bårdsen, Bård-Jørgen; Næss, Marius Warg; Singh, Navinder J.; Åhman, Birgitta (Peer reviewed; Journal article, 2017)
      Spatiotemporal reindeer population fluctuations are a result of multiple factors that working in concert affectingthe structure and functioning of many Arctic and Sub-Arctic ecosystems. We investigated the population ...
    • Saami reindeer herders cooperate with social group members and genetic kin 

      Thomas, Matthew G.; Næss, Marius Warg; Bårdsen, Bård-Jørgen; Mace, Ruth (Journal article; Peer reviewed, 2015)
      Cooperative behaviors evolve by ultimately increasing the inclusive fitness of performers as well as recipients of those behaviors. Such increases can occur via direct or indirect fitness benefits, theoretically explained ...
    • The Sami cooperative herding group: the siida system from past to present 

      Næss, Marius Warg; Fisktjønmo, Guro Lovise Hole; Bårdsen, Bård-Jørgen (Peer reviewed; Journal article, 2021)
      The Sami siida has been described as an organizational institution tailored to meet the dynamic demands of reindeer herding. Historically, it has been characterized as a relatively small group based on kinship. It was ...
    • Smaller saami herding groups cooperate more in a public goods experiment 

      Thomas, Matthew Gwynfryn; Næss, Marius Warg; Bårdsen, Bård-Jørgen (Journal article; Peer reviewed, 2016)
      Group living often entails a balance between individual selfinterest and benefits to the group as a whole. Situations in which an individual’s vested interests conflict with collective interests are known as social dilemmas ...
    • The narrow gap between norms and cooperative behaviour in a reindeer herding community 

      Thomas, Matthew; Bårdsen, Bård-Jørgen; Næss, Marius Warg (Journal article; Peer reviewed, 2018)
      Cooperation evolves on social networks and is shaped, in part, by norms: beliefs and expectations about the behaviour of others or of oneself. Networks of cooperative social partners and associated norms are vital for ...
    • Why do Tibetan pastoralists hunt? 

      Næss, Marius Warg; Bårdsen, Bård-Jørgen (Journal article; Peer reviewed, 2016)
      The Tibetan nomads in the Aru Basin have until recently relied on hunting as an additional source forsubsistence. They hunted the endangered Tibetan antelope or chiru (Pantholops hodgsoni), blue sheep(Pseudois nayaur), ...