Scottish Marine and Freshwater Science Vol 6 No 9: Behavioural Responses of Atlantic Salmon to Mains Frequency Magnetic Fields

Figures

Figure 1 The annular tank used to tests effects of MF on Atlantic salmon. General elements are shown in an artist's impression (top frame); the cylinder of netting between each pair of Helmholtz coils is omitted for clarity. Details of dimensions are drawn to scale in the side (middle frame) and plan (lower frame) views.

Figure 2 The percentage change in passage time when the coil-pair is activated when approaching, traversing and departing the coil-pair: estimates (dots) with pointwise 95 % confidence intervals (horizontal lines).

Figure 3 The percentage change in the number of individuals and shoals traversing the coil-pair when the coil-pair is activated for three different field intensities: estimates (dots) with pointwise 95 % confidence intervals (horizontal lines). These estimates are based on model (5) in which the order in which the intensities were presented is assumed to have no effect