Evidence for dynamic resource partitioning between two sympatric reef shark species within the British Indian Ocean Territory
- Stable-isotope analyses (δ13C,δ15N andδ34S) of multiple tissues (fin, muscle, red blood cells andplasma), revealed ontogenetic shifts in resource use by grey reef sharksCarcharhinus amblyr-hynchosand resource partitioning with silvertip sharksCarcharhinus albimarginatuswithin theBritish Indian Ocean Territory marine protected area (MPA). Resource partitioning varied tem-porally, withC. albimarginatusfeeding on more pelagic prey during October to January, poten-tially attributable to an influx of pelagic prey from outside the MPA at that time. Reef sharksmay therefore be affected by processes outside an MPA, even if the sharks do not leavethe MPA.
- Curnick David , Schallert Robert , Carlisle Aaron .
- British Indian Ocean Territory, reef shark, resource partitioning, stable isotope, δ13C, δ15N, δ34S