• Everybody loses: intraspecific competition induces tragedy of the commons in Allenby's gerbils

      Berger-Tal, Oded; Embar, Keren; Kotler, Burt P.; Saltz, David (2015)
      Interference competition may lead to a tragedy of the commons in which individuals driven by self‐interest reduce the fitness of the entire group. We investigated this hypothesis in Allenby's gerbils, Gerbillus andersoni allenbyi , by comparing foraging behaviors of single vs. pairs of gerbils....
    • Past experiences and future expectations generate context-dependent costs of foraging

      Berger-Tal, Oded; Embar, Keren; Kotler, Burt P.; Saltz, David (2014)
      We released Allenby’s gerbils (Gerbillus andersoni allenbyi) into an enclosure containing rich patches with equal amounts of food and manipulated the quality of the environment over time by reducing the amount of food in most (but not all) food patches and then increasing it again…. Specifically, in the second rich period, the gerbils spent more time foraging and harvested more food from the patches. Thus, seemingly identical environments can be treated as strikingly different by foragers as a function of their past experiences and future expectations.