marginally significantp = .053
However, when the two species were compared using a linear model, species had the greatest effect on FECs (plains zebras had higher FECs than Grevy's zebras; slope = 1244.5, p < .05) and the species x centroid distance interaction was also significant (plains zebras had a steeper response than Grevy's zebras; slope = −1.53, p < .01), while the centroid distance effect on FECs became marginally significant (slope = −0.49, p = .053; model adj.