Flock of New Zealand sheep on a farm in a pen
Haemonchosis risk in New Zealand under changing climates
  • Haemonchosis is an animal health issue caused by the highly pathogenic intestinal nematode, Haemonchosis contortus. Haemonchosis has historically been restricted to the warmer upper North Island for its acute, but sporadic outbreaks. Climate change will likely see changes in Haemonchosis spatial distribution and intensity.

    The dataset - What is it?

    The data shows historical and futuristic maps of New Zealand showing risk of haemonchosis at different Representative Concentration Pathways (RCP). RCPs are different amounts of greenhouse gas concentrations, from a low of 2.6 to 8.5.

    The map above shows the predictedhaemonchosis risk for the year 2040 in the highest emissions scenario. The dataset includes further scenarios.

    Why it's important

    As the climate warms the distribution and prevalence of Haemonchosis will increase subsequently the importance of its management.

    • How to use this information safely
      • Fitness for purpose / limitations

        This table indicates whether the dataset is suitable for different types of questions at different scales.

        Note: Users should carefully consider their purpose as this dataset may not be suitable.

         

        Operational

        Absolute

        Relative

        Screening/scoping

        Block/farm

        No

        No

        No

        No

        Multi-farms(5+)

        No

        No

        Maybe

        Maybe

        Catchment

        Maybe

        No

        Maybe

        Maybe

        National/regional

        Maybe

        No

        Maybe

        Yes

        Caveats

        The estimated risk of haemonchosis is based on a simplistic model, which would benefit from further refinement. The probability and severity of a Haemonchus contortus outbreak is also highly dependant on the management strategies implemented at an individual farm level.

        How to interpret this table

  • Please note:

    You can use this information to help form an understanding of haemonchosis risks in NZ under a changing climate.

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