MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 612:167-192 (2019) - DOI: https://doi.org/10.3354/meps12874 Global baselines and benchmarks for fish biomass: comparing remote reefs and fisheries closures Tim R. McClanahan1,*, Robert E. Schroeder2, Alan M. Friedlander3,4, Laurent Vigliola5, Laurent Wantiez6, Jennifer E. Caselle7, Nicholas A. J. Graham8, Shaun Wilson9,10, Graham J. Edgar11, Rick D. Stuart-Smith11, Remy M. Oddenyo12, J. E. Cinner13 1Wildlife Conservation Society, Marine Programs, Bronx, NY 10460, USA 2National Oceanic and Atmospheric Administration Fisheries, Honolulu, HI 96818, USA 3Pristine Seas, National Geographic Society, Washington, DC 20036, USA 4Fisheries Ecology Research Lab, University of Hawaii, Honolulu, HI 96822, USA 5Institut de Recherche pour le Développement (IRD), UMR ENTROPIE, Laboratoire Excellence LABEX Corail, 98851 Noumea, New Caledonia, France 6Institut De Sciences Exactes Et Appliquées (ISEA), EA7484, University of New Caledonia, 98851 Noumea, New Caledonia, France 7Marine Science Institute, University of California Santa Barbara, Santa Barbara, CA 93106, USA 8Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK 9Department of Biodiversity Conservation and Attractions, Kensington, WA 6151, Australia 10Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia 11Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS 7001, Australia 12Wildlife Conservation Society, Coral Reef Conservation Program, Mombasa 80107, Kenya 13Australian Research Council, James Cook University, Townsville, QLD 4811, Australia *Corresponding author: tmcclanahan@wcs.org ABSTRACT: Baselines and benchmarks (B&Bs) are needed to evaluate the ecological status and fisheries potential of coral reefs. B&Bs may depend on habitat features and energetic limitations that constrain biomass within the natural variability of the environment and fish behaviors. To evaluate if broad B&Bs exist, we compiled data on the biomass of fishes in ~1000 reefs with no recent history of fishing in 19 ecoregions. These reefs spanned the full longitude and latitude of Indian and Pacific Ocean reefs and included older high-compliance fisheries closures (>15 yr closure) and remote reef areas (>9 h travel time from fisheries markets). There was no significant change in biomass over the 15 to 48 yr closure period but closures had only ~40% of the biomass (740 kg ha-1, lower confidence interval [LCI] = 660 kg ha-1, upper confidence interval [UCI] = 810 kg ha-1, n = 157) of remote tropical reefs (1870 [1730, 2000] kg ha-1, n = 503). Remote subtropical reefs had lower biomass (950 [860, 1040] kg ha-1, n = 329) than tropical reefs. Closures and remote reef fish biomass responded differently to environmental variables of coral cover, net primary productivity, and light, indicating that remote reefs are more limited by productivity and habitat than closures. Closures in fished seascapes are unlikely to achieve the biomass and community composition of remote reefs, which suggests fisheries benchmarks will differ substantially from wilderness baselines. A fishery benchmark (B0) of ~1000 kg ha-1 adjusted for geography is suggested for fisheries purposes. For ecological purposes, a wilderness baseline of ~1900 kg ha-1 is appropriate for including large and mobile species not well protected by closures. KEY WORDS: Baselines · Coral reef fish · Fisheries and ecological indicators · Pristine or virgin biomass · Sustainability Full text in pdf format Supplementary material PreviousNextCite this article as: McClanahan TR, Schroeder RE, Friedlander AM, Vigliola L and others (2019) Global baselines and benchmarks for fish biomass: comparing remote reefs and fisheries closures. Mar Ecol Prog Ser 612:167-192. https://doi.org/10.3354/meps12874 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 612. Online publication date: March 07, 2019 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2019 Inter-Research.