MEI, an index to quantify the strength of Southern Oscillation, differed in its effect on the recorded numbers of male and female white sharks, with highly significant interannual trends.
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Environmental influences on the abundance and sexual composition of white sharks Carcharodon carcharias in Gansbaai, South Africa.
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The sentences
The coefficient of the trend variable was positive, indicating an increasing trend in the total numbers of sharks per trip over the five-year study period.