Table 2.

Summary of skate behaviour.

Behavioural Parameter	Statistically significant	Summary
Spatial Distribution	Yes	Skates used the full available space in both enclosures, and they spent most of their time at the ends of the enclosure. However, skates spent more time in the central space of the control enclosure compared to the treatment enclosure.The skates spent more time in zone 2 at the control enclosure, whereas there was no difference in their distribution across zones 1 and 2 at the treatment enclosure. Comparing the difference in the use of zones between enclosures indicated that the skates spent a greater amount of time in zone 1, the zone of high EMF (>52.6 µT), at the treatment enclosure, compared to zone 1 in the control enclosure.
Total Distance Travelled (per day)	Yes	The skates travelled further at the treatment enclosure. This effect was more pronounced when they were exposed to the treatment enclosure first (93%) than when they were exposed to the treatment enclosure second in the sequence (21%). The distances travelled in each zone differed significantly when compared between enclosures; the skates travelled further in the zone of high EMF (>52.6 µT) at the treatment enclosure.
Speed of Movement	Yes	Skates moved faster within the enclosure second in the sequence of exposure, regardless of which enclosure that was. However, the difference was larger when the second enclosure was the treatment where the increase was 29% compared to when the second enclosure was the control, where there was a slight increase of 3%. There was however no indication that the change in mean speed was associated with zones of high (>52.6 µT) or low (<49.7 µT) EMF.
Proportion of Large Turns	Yes	At the treatment enclosure, the skates exhibited a significantly higher proportion of large turns (38%) compared to the control enclosure. Skates exhibited a higher proportion of large turns in Zone 2 at the control enclosure, but the reverse was true at the treatment enclosure indicating that the proportion of large turns was associated with the zone of high EMF (>52.5 µT). Independent of the enclosure, skates from Sequence 1 exhibited a higher proportion of large turns (20%) than those from Sequence 2.
Height from Seabed	Yes	Skates were on average closer to the seabed (35%) at the treatment enclosure compared to the control enclosure. There was however, no indication that being closer to the seabed was associated with high (>52.6 µT) or low (<49.7 µT) EMF zones.

The findings from multiple statistical analyses are drawn together to summarise the findings of the changes in behaviour that were found when comparing the behaviour of skates between the two enclosures (control and treatment).