The extremely wet summer in 2015 has resulted in many areas of the west being classified as 'high risk' for the winter of 2015/2016. The graphs below show the clear difference between the overwinter index for 2014/2015 and the summer of 2015.
The Ollerenshaw Index, from Met Eireann, is used as a predictive model to evaluate the climatic conditions of a season for liver fluke development.
Values are assessed as follows:
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M < 300 = little or no disease
300> M > 400 = occasional losses
M > 400 = high prevalence of disease
The model uses monthly estimates of potential evapotranspiration and measured rainfall totals together with the number of raindays to derive the monthly contribution (M) to the seasons index.
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The extremely wet summer in 2015 has resulted in many areas of the west being classified as 'high risk' for the winter of 2015/2016. The graphs below show the clear difference between the overwinter index for 2014/2015 and the summer of 2015.
The Ollerenshaw Index, from Met Eireann, is used as a predictive model to evaluate the climatic conditions of a season for liver fluke development.
Values are assessed as follows:
M < 300 = little or no disease
300> M > 400 = occasional losses
M > 400 = high prevalence of disease
The model uses monthly estimates of potential evapotranspiration and measured rainfall totals together with the number of raindays to derive the monthly contribution (M) to the seasons index.
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