Limitations in the technique of baiting to attract white sharks, Carcharodon carcharias, to the Neptune Islands, South Australia
R. L. Robbins
The problem of data bias can arise when using baited conditions to study white shark populations. The aim of this chapter was to determine the effect of soak time on the “catch rates” of white sharks at the Neptune Islands, since any relationship would bias the results of the study. The relationship between soak time and frequency of shark visitation to baits was Poisson, suggesting no relationship existed between soak time and the catch rate of white sharks. An increased soak time did not affect the number of sharks at the Neptune Islands. Therefore, it is inferred that chumming only attracted sharks from the immediate vicinity of the area, and that the sample area was not affected by trip duration.
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