Spatial variability of nile crocodiles (Crocodylus Niloticus) in the lower Zambezi river reaches

  • Published source details Nyirenda V.R. (2015) Spatial variability of nile crocodiles (Crocodylus Niloticus) in the lower Zambezi river reaches. Herpetological Conservation and Biology, 10, 874-882.


This study is summarised as evidence for the following.

Action Category

Protect habitat: All reptiles (excluding sea turtles)

Action Link
Reptile Conservation
  1. Protect habitat: All reptiles (excluding sea turtles)

    A study in 2007 along a river on the borders of Zambia and Zimbabwe (Nyirenda 2015) found that abundance of Nile crocodiles Crocodylus niloticus was highest in river areas on the edge of national parks. Abundance of Nile crocodiles was higher in river reaches on the edge of national parks (21 crocodiles/km river) compared to areas with less protection (7 crocodiles/km river). In October 2007, Nile crocodiles were surveyed at night by boat using spotlights along a 262 km stretch of the Zambezi river. Two boats with three people (a navigator, recorder and observer) each surveyed a stretch at a time. The river edge bordered national parks (with 75 km2/scout protection levels, use limited to ecotourism and mineral extraction), and other areas with less protection, including game management areas (with 122–123 km2/scout protection levels and multiple legal natural resource uses) and open areas (>200 km2/scout protection and uncontrolled natural resource use).

    (Summarised by: Katie Sainsbury)

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust