Table 1 Description and summary of the five variables used in analysis.
From: Drivers of variation in occurrence, abundance, and behaviour of sharks on coral reefs
Variable | Description | Description of variable levels | Source |
|---|---|---|---|
Status | Factor describing whether the stereo-BRUV was deployed inside a No-Take Zone or an area open to fishing | No-Take Zone: fishing prohibited (22.4% of data) | GlobalArchive |
Fished: fishing permitted (77.6%) | |||
Standard deviation of relief | The standard deviation of the height and structural complexity of the substrate | 0–5 | GlobalArchive |
0—Flat substrate, sandy, rubble with few features. ~ 0 substrate slope | |||
1—Some relief features amongst mostly flat substrate/sand/rubble. < 45 degree substrate slope | |||
2—Mostly relief features amongst some flat substrate or rubble. ~ 45 substrate slope | |||
3—Good relief structure with some overhangs. > 45 substrate slope | |||
4—High structural complexity, fissures and caves. Vertical wall. ~ 90 substrate slope | |||
5—Very high structural complexity, numerous large holes and caves. Vertical wall. ~ 90 substrate slope | |||
Range: 0–2.17 | |||
Mean: 0.41 | |||
Reef cover | The total reef cover, which is the sum percentage cover of habitat that was classified as reef, sponges, ascidians and macroalgae | Range: 0–1 | GlobalArchive |
Mean: 0.47 | |||
Depth | Factor describing the depth of the stereo-BRUV deployment | Shallow: < 25 m (61.7% of data) | GlobalArchive |
Deep: > 25 m (38.3% of data) | |||
Distance to ramp (square root transformation) | The minimum Euclidean distance from the stereo-BRUV deployment to the closest boat ramp in metres | Range: 32.7–408 m | GlobalArchive |
Mean: 225.9 m |
