*Site fidelity tests*
The Linearity Index L_{i} = (F_{n }– F_{1}) / D, where F_{n }– F_{1 }is the distance between the first and the last location fixes of the shark, and D is the total distance traveled by the animal. An animal moving in a nomadic fashion should have L_{i }approach 1, while an animal exhibiting strong site fidelity should have L_{i }approach 0. We also calculated the Index of Reuse (IOR), IOR = [OV(A1+A2)] / (A1+A2), where [OV(A1+A2)] is the area of overlap between two daily activity spaces (e.g., 12 h) and (A1+A2) is the total area of both daily activity spaces. IOR = 1 indicates 100 % re-use of an area on a daily basis (site fidelity) while an IOR = 0 indicates 0 % overlap in area (nomadic behavior). |