The Importance of the Chagos Archipelago for Pelagic Predators in the Indian Ocean
Apex predators are crucial as regulators of our oceans and indicators of a healthy ecosystem. Top predators such as tunas and sharks, most of which are threatened with extinction, are under increasing pressure from fisheries, energy extraction and climate change. Moreover, we have a very limited understanding of their population ecology which in turn hinders our ability to manage them effectively.
Recently, MPAs have been increasing both in number and size but only a few empirical studies have investigated their effectiveness and use for protecting its highly mobile pelagic predators. To address this question, we are running a three-year research interdisciplinary programme combining biologging, chemical tracer analysis (stable isotopes and genomics), applied fisheries science and oceanography. We hope the collected data will allow us to better understand where and when such pelagic predators aggregate within BIOT, how connected BIOT’s community is with the wider Indian Ocean and how efficient is its MPA as a management strategy for pelagic predators of the Indian Ocean.
Our belief is that this endeavor will help understand the role of the BIOT MPA plays in the ecology of pelagic predators within the Indian Ocean and shed light on its potential to conserve these crucial species.
Yellowfin tuna is classified as 'Overfished and Subject to Overfishing' in the Indian Ocean by the Indian Ocean Tuna Commission. We need urgent action to stabilise its population.
Emergent research and priorities for shark and ray conservation.
Jorgensen, S.J., Micheli, F., White, T.D., Van Houtan, K.S., Alfaro-Shigueto, J., Andrzejaczek, S., Arnoldi, N.S., Baum, J.K., Block, B., Britten, G.L., Butner, C., Caballero, S., Cardeñosa, D., Chapple, T.K., Clarke, S., Cortés, E., Dulvy, N.K., Fowler, S., Gallagher, A.J., Gilman, E., Godley, B.J., Graham, R.T., Hammerschlag, N., Harry, A.V., Heithaus, M.R., Hutchinson, M., Huveneers, C., Lowe, C.G., Lucifora, L.O., MacKeracher, T., Mangel, J.C., Martins, A.P.B., McCauley, D.J., McClenachan, L., Mull, C., Natanson, L.J., Pauly, D., Pazmiño, D.A., Pistevos, J.C.A., Queiroz, N., Roff, G., Shea, B.D., Simpfendorfer, C.A., Sims, D.W., Ward-Paige, C., Worm, B., Ferretti, F., (2022) Emergent research and priorities for shark and ray conservation. Endangered Species Research.
Behavior and Ecology of Silky Sharks Around the Chagos Archipelago and Evidence of Indian Ocean Wide Movement
Curnick, D.J., Andrzejaczek, S., Jacoby, D.M.P., Coffey, D.M., Carlisle, A.B., Chapple, T.K., Ferretti, F., Schallert, R.J., White, T., Block, B.A., Koldewey, H.J. and Collen, B. (2020) Behavior and Ecology of Silky Sharks Around the Chagos Archipelago and Evidence of Indian Ocean Wide Movement. Frontiers in Marine Science.
Mitochondrial Genome of the Silky Shark Carcharhinus falciformis From the British Indian Ocean Territory Marine Protected Area
Johri, S., Chapple, T.K., Dinsdale, E.A., Schallert, R. and Block, B.A., (2020) Mitochondrial genome of the silky shark Carcharhinus falciformis from the British Indian Ocean Territory Marine Protected Area. Mitochondrial DNA Part B.
Complete Mitochondrial Genome of the Whitetip Reef Shark Triaenodon obesus From the British Indian Ocean Territory Marine Protected Area
Johri, S., Chapple, T.K., Schallert, R., Dinsdale, E.A. and Block, B.A., (2020) Complete mitochondrial genome of the whitetip reef shark Triaenodon obesus from the British Indian Ocean Territory Marine Protected Area. Mitochondrial DNA Part B.
Tracking the Response of Industrial Fishing Fleets to Large Marine Protected Areas in the Pacific Ocean
White, T.D., Ong, T., Ferretti, F., Block, B.A., McCauley, D.J., Micheli, F. and De Leo, G.A.(2020) Tracking the response of industrial fishing fleets to large marine protected areas in the Pacific Ocean. Conservation Biology.