Table 1: Spraint numbers and otter numbers by month at Loch na Dal.

MonthSpraint numbersOtter numbers

October 2011242
November 2011223
December 2011522
January 2012722
February 2012522
March 2012382
April 2012273
May 2012341
June 2012161
July 2012181
August 2012151
September 2012152

No correlation was found to exist between spraint numbers and otter numbers during the 12-month survey ( , , and ). Using the Pearson Product Correlation Coefficient only 4.39% of spraint numbers could explain changes in otter numbers.