Articles by Author: Brian T Henen

Search results for Brian T Henen

We found 51 results for you
  1. Tick infestations in the Namaqualand speckled padloper, <em>Homopus signatus signatus</em> (Gmelin, 1789)

    Tick infestations in the Namaqualand speckled padloper, <em>Homopus signatus signatus</em> (Gmelin, 1789)

    Item type: Journal Article • Journal: African Zoology
    Many terrestrial chelonians are parasitized by ticks, but we have a poor understanding of what determines tick infestations on chelonian hosts. We counted ticks on Homopus signatus signatus during each spring in the years 2001–2004, and evaluated tick frequencies in...
  2. Sexual disparity in activity patterns and time budgets of angulate tortoises (<em>Chersina angulata</em>) on Dassen Island, South Africa

    Sexual disparity in activity patterns and time budgets of angulate tortoises (<em>Chersina angulata</em>) on Dassen Island, South Africa

    Item type: Journal Article • Journal: African Zoology
    Behavioural frequencies and time budgets for male and female Chersina angulata were recorded in spring, September 2004. The daily activity of the population was 10.51 ± 0.42 h (mean ± CI), but individual males and females were in the open...
  3. Leaf biomechanics as a potential tool to predict feeding preferences of the geometric tortoise <em>Psammobates geometricu</em>s

    Leaf biomechanics as a potential tool to predict feeding preferences of the geometric tortoise <em>Psammobates geometricu</em>s

    Item type: Journal Article • Journal: African Zoology
    Food and non food plant characteristics were studied for the geometric tortoise, Psammobates geometricus, to test the hypothesis that feeding preferences in tortoises may be influenced by the mechanical properties of plant leaves. Twelve focal feeding observations made between 8...
  4. Season, sex and age variation in the haematology and body condition of geometric tortoises <em>Psammobates geometricus</em>

    Season, sex and age variation in the haematology and body condition of geometric tortoises <em>Psammobates geometricus</em>

    Item type: Journal Article • Journal: African Zoology
    Body condition and haematological indices provide powerful information when assessing wildlife health. Reference intervals for these indices can facilitate wildlife management, and would benefit initiatives to save the Critically Endangered geometric tortoise (Psammobates geometricus). We collected data from 126 geometric...
  5. Variation in the daily activity, movement and refugia of Critically Endangered geometric tortoises, <em>Psammobates geometricus</em>, in autumn and spring

    Variation in the daily activity, movement and refugia of Critically Endangered geometric tortoises, <em>Psammobates geometricus</em>, in autumn and spring

    Item type: Journal Article • Journal: African Journal of Herpetology
    To help assess habitat requirements of Critically Endangered geometric tortoises, we used thread-trailing to measure daily activity, movements and refugia of adult Psammobates geometricus in autumn and spring 2002. We found strong differences between seasons, and effects of weather, individuals...
  6. BOOK REVIEW

    Item type: Journal Article • Journal: South African Forestry Journal
  7. Sawlog Class Proportions of <em>Pinus radiata</em>

    Item type: Journal Article • Journal: South African Forestry Journal
    Tabular values of proportions of tree volume expected to fall into particular log classes were used to estimate the parameters of equations for prediction of the log class proportions of P. radiata. No new information is presented, but equations to...
  8. Book Review

    Item type: Journal Article • Journal: South African Forestry Journal