Speed Presentation 2024 Australian Marine Sciences Association Annual Meeting combined with NZMSS

Safe Havens and Home Improvements – Does Long-Term Protection and Reef Restoration Benefit Sharks? (#350)

Nico Fassbender 1 , Robert Bullock 2 , Charlotte Dale 3 , Luca Saponari 3 , Dirk Zeller 1 , Jessica Meeuwig 1
  1. School of Biological Sciences, University of Western Australia, Perth, WA, Australia
  2. Save Our Seas Foundation, D'Arros Island, Seychelles
  3. Nature Seychelles, Praslin and Cousin Island, Seychelles

Reef-associated shark species rely on healthy coral reefs. These reefs continue to degrade under global climate change and reef shark presence has declined steeply over the last decades due to anthropogenic pressures. To combat these threats, reefs may be declared as marine protected areas (MPAs) and coral reef restoration efforts are implemented on degraded reefs to help rebuild coral cover. What remains unclear is how top predators, such as sharks, benefit from long-term protection measures that are not shark-sanctuaries and to what extent sharks associate with restored reefs. Here we use seabed baited remote underwater video systems (BRUVS) to assess the shark assemblage at two of the oldest MPAs in Seychelles that also feature reef restoration efforts: the Cousin Island Special Reserve and St. Anne Marine Park. We deployed 105 BRUVS between November and December 2023 across depths of 2 – 25 metres. Whilst video processing and data analysis are ongoing, we expect that sharks as top predators benefit from ‘non-focused’ protection and reef restoration efforts resulting in higher shark abundance, diversity, and biomass around these reefs. This should help inform MPA design and aid in the conservation and targeted management of shark species.