, Volume 27, Issue 3, pp 439–459

Mountain streams of the barberton area, eastern transvaal. Part II, the effect of vegetational shading and direct illumination on the distribution of stream fauna

  • D. A. Hughes

DOI: 10.1007/BF00042704

Cite this article as:
Hughes, D.A. Hydrobiologia (1966) 27: 439. doi:10.1007/BF00042704


During the survey reported in Part I, it became apparent that vegetational shading affected the incidences of certain species. The extent to which the distribution of stream fauna is influenced by direct or indirect consequences of shade or illumination was examined and an attempt was made to determine which species or groups are affected.

Three pairs of comparable sampling stations (stickles) were selected on the basis of their physical similarity, one of each pair being shaded and the other illuminated. Samples taken from these stations were compared and species found predominantly in shaded or exposed reaches were assessed.

Although certain species appeared influenced in their distribution, it appears that the population density is minimally affected and there is no overall effect on any group or family.

Copyright information

© Dr. W. Junk Publishers 1966

Authors and Affiliations

  • D. A. Hughes
    • 1
  1. 1.Department of ZoologyUniversity of the WitwatersrandJohannesburg
  2. 2.Institute of Marine Science, University of MiamiMiamiUSA