The effect of livestock grazing upon abundance of the lizard, Sceloporus scalaris, in southeastern Arizona

  • Published source details Bock C.E., Smith H.M. & Bock J.H. (1990) The effect of livestock grazing upon abundance of the lizard, Sceloporus scalaris, in southeastern Arizona. Journal of Herpetology, 24, 445-446.


This study is summarised as evidence for the following.

Action Category

Cease livestock grazing: Grassland & shrubland

Action Link
Reptile Conservation
  1. Cease livestock grazing: Grassland & shrubland

    A site comparison study in 1989 in semi-arid grassland and oak savanna in Arizona, USA (Bock et al. 1990) found bunchgrass lizard Sceloporus scalaris slevini abundance was higher in ungrazed areas compared to grazed areas. In nine hours of searching ungrazed grassland, 41 lizards were observed compared to three lizards in nine hours of searching in grazed grassland. The ungrazed area (in a 3,160 ha ranch sanctuary) had not been grazed by livestock since 1967. The adjacent grazed area had been grazed for over a century. Abundance was determined by active searches counting the numbers of lizards over nine days in August 1989.

    (Summarised by: Guy Rotem, Katie Sainsbury)

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