Browsing by Author "Queiroz, Nuno"
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- Global spatial risk assessment of sharks under the footprint of fisheriesPublication . Queiroz, Nuno; Afonso, André S.; Humphries, Nicholas E.; Sims, David W.Effective ocean management and conservation of highly migratory species depends on resolving overlap between animal movements and distributions and fishing effort. Yet, this information is lacking at a global scale. Here we show, using a big-data approach combining satellite-tracked movements of pelagic sharks and global fishing fleets, that 24% of the mean monthly space used by sharks falls under the footprint of pelagic longline fisheries. Space use hotspots of commercially valuable sharks and of internationally protected species had the highest overlap with longlines (up to 76% and 64%, respectively) and were also associated with significant increases in fishing effort. We conclude that pelagic sharks have limited spatial refuge from current levels of high-seas fishing effort. Results demonstrate an urgent need for conservation and management measures at high-seas shark hotspots and highlight the potential of simultaneous satellite surveillance of megafauna and fishers as a tool for near-real time, dynamic management.
- Reply to: Caution over the use of ecological big data for conservationPublication . Queiroz, Nuno; Humphries, Nicolas E.; Couto, Ana; Afonso, André S.; Sims, David W.; Afonso, Pedro; Bezerra, Natalia P. A.; Fontes, Jorge; Hazin, Fábio H.V.; Macena, Bruno C.L.; Travassos, Paulo; Vandeperre, Frederic; Vedor, Marisa; Costa, Iva do; Sequeira, Ana M.M.; Mucientes, Gonzalo; Santos, António M.; Abascal, Francisco J.; Abercrombie, Debra L.; Abrantes, Katya; Acuña-Marrero, David; Ferreira, Luciana C.; Ladino, Felipe; Lana, Fernanda O.; Quintero, Lina Maria; Duarte, Carlos M.
- Reply to: Shark mortality cannot be assessed by fishery overlap alonePublication . Queiroz, Nuno; Humphries, Nicholas E.; Couto, Ana; Afonso, André S.; Sims, David W.; Afonso, Pedro; Bezerra, Natalia P.A.; Fontes, Jorge; Hazin, Fábio H.V.; Macena, Bruno C.L.; Travassos, Paulo; Vandeperre, Frederic; Vedor, Marisa; Costa, Ivo da; Sequeira, Ana M.M.; Santos, António M.; Mucientes, Gonzalo; Abascal, Francisco J.; Abercrombie, Debra L.; Anders, Darrell; Araujo, Gonzalo