Browsing Bergen Open Research Archive by Author "Högstedt, Göran"

Now showing items 1-7 of 7

    • Conditions favouring hard seededness as a dispersal and predator escape strategy 

      Paulsen, Torbjørn Rage; Högstedt, Göran; Ken, Thompson; Vandvik, Vigdis; Eliassen, Sigrunn (Peer reviewed; Journal article, 2014-09-16)
      1. The water-impermeable seed coat of ‘hard’ seeds is commonly considered a dormancy trait. Seed smell is, however, strongly correlated with seed water content, and hard seeds are therefore olfactionally cryptic ...

    • The crypsis hypothesis explained: a reply to Jayasuriya et al. (2015) 

      Paulsen, Torbjørn Rage; Colville, Louise; Daws, Matthew I.; Eliassen, Sigrunn; Högstedt, Göran; Kranner, Ilse; Thompson, Ken; Vandvik, Vigdis (Peer reviewed; Journal article, 2015-08-18)
      In imbibing seeds, resumption of metabolism leads to the unavoidable release of volatile by-products that are perceived as cues by rodent seed predators. The crypsis hypothesis proposes that the primary function of a ...

    • Nest distribution and nest habitat of the Tibetan Partridge ( Perdix hodgsoniae ) near Lhasa, Tibet 

      Dorge, Tsering; Högstedt, Göran; Lislevand, Terje (Peer reviewed; Journal article, 2014-10-10)
      Background: Little is hitherto known about the breeding ecology of the Tibetan Partridge (Perdix hodgsoniae) which is endemic to the Tibetan plateau. Here we describe nest densities, inter-nest distances and general nest ...

    • Nest distribution and nest habitat of the Tibetan Partridge (Perdix hodgsoniae) near Lhasa, Tibet 

      Dorge, Tsering; Högstedt, Göran; Lislevand, Terje (Peer reviewed; Journal article, 2014-10-10)
      Background: Little is hitherto known about the breeding ecology of the Tibetan Partridge (Perdix hodgsoniae) which is endemic to the Tibetan plateau. Here we describe nest densities, inter-nest distances and general nest ...

    • Numbers of Horned Lark Eremophila alpestris are increasing at high alpine and arctic breeding sites in Norway 

      Byrkjedal, Ingvar; Högstedt, Göran (Journal article; Peer reviewed, 2022)
      Strong declines in number of breeding Horned Larks Eremophila alpestris were reported from several Fennoscandian breeding grounds in the 1960s and 1970s. Counts from the species’ high alpine breeding grounds at Hardangervidda, ...

    • Period lenght in cyclic animal populations 

      Högstedt, Göran; Seldal, Tarald; Breistøl, Arild (Peer reviewed; Journal article, 2005)
      Although cyclic animal dynamics have long been a focus of scientific interest, the variable cycle lengths are poorly understood. Based on a review of the literature, we suggest that period length in animals showing multiannual ...

    • When to reproduce? A new answer to an old question 

      Skorping, Arne; Jensen, Knut Helge; Mennerat, Adele; Högstedt, Göran (Peer reviewed; Journal article, 2016-04)
      We present a life-history model based on the assumptions that juvenile survival follows a negative exponential function and that fecundity gain increases linearly with time to maturity. This model predicts that the optimal ...