Abstract
Community-based fisheries management that integrates local knowledge and existing user rights is often seen as a solution to the failures of top-down fisheries management in the Pacific. In Roviana Lagoon, Western Solomon Islands, a network of community-based marine protected areas (MPAs) was established in the early 2000s to conserve declining populations of bumphead parrotfish (Bolbometopon muricatum) and other locally valuable fish species such as humphead wrasse (Cheilinus undulatus). We aimed to evaluate the success of these protected areas at preventing declines of B. muricatum and C. undulatus. We conducted 27 underwater visual census (UVC) surveys at permanent passage and outer reef monitoring sites in Roviana Lagoon in 2018 and compared our findings with results from 72 UVC surveys that we had conducted at the same sites 18 yrs earlier. We also interviewed Roviana spearfishers about their maximum nightly B. muricatum catches from 2018, the early 2000s and the 1980s. Abundances of all B. muricatum and C. undulatus sighted on UVC surveys declined by 62% and 57%, respectively, between 2000 and 2018, and abundances of adult B. muricatum and C. undulatus declined by 78% and 72%, respectively, over the same period. Using a joint model of B. muricatum abundance and its reported maximum catch, we estimated that in 2018 the population of B. muricatum was 8% of its 1980’s abundance. By modelling projected rates of decline over three generations, we show that populations of B. muricatum and C. undulatus in Roviana Lagoon meet the IUCN Red List thresholds for Critically Endangered (CR). The probable causes of these declines are sustained fishing pressure, poor enforcement of community-based management measures and loss of fish nursery habitats due to logging. Our findings suggest urgent co-management of the ridge-to-reef system is needed to prevent further fish population declines in Roviana Lagoon.
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References
Albert S, Grinham A, Gibbes B, Tibbetts I (2014) Indicators of coral reef ecosystem recovery following reduction in logging and implementation of community-based management schemes in the Solomon Islands. Pac Conserv Biol 20:75–85
Andrews AH, Choat JH, Hamilton RJ, DeMartini EE (2015) Refined bomb radiocarbon dating of two iconic fishes of the Great Barrier Reef. Mar Freshw Res 66:305–316
Aswani S (1997) Customary sea tenure and artisanal fishing in the Roviana and Vonavona Lagoons, Solomon Islands: the evolutionary ecology of marine resource utilization. Ph.D. dissertation, University of Hawaii, Honolulu, Hawaii
Aswani S, Hamilton RJ (2004a) Integrating indigenous ecological knowledge and customary sea tenure with marine and social science for conservation of bumphead parrotfish (Bolbometopon muricatum) in the Roviana Lagoon, Solomon Islands. Environ Conserv 31:69–83
Aswani S, Hamilton R (2004b) The value of many small v. few large marine protected areas in the Western Solomon Islands. Traditional marine resource management and knowledge information bulletin 16:3–14
Aswani S, Sabetian A (2010) Implications of urbanization for artisanal parrotfish fisheries in the western Solomon Islands. Conserv Biol 24:520–530
Aswani S, Flores CF, Broitman BR (2015) Human harvesting impacts on managed areas: ecological effects of socially-compatible shellfish reserves. Rev Fish Biol Fisheries 25:217–230
Aswani S, Albert S, Love M (2017) One size does not fit all: critical insights for effective community-based resource management in Melanesia. Mar Policy 81:381–391
Aswani S, Albert S, Sabetian A, Furusawa T (2007) Customary management as precautionary and adaptive principles for protecting coral reefs in Oceania. Coral Reefs 26:1009–1021
Bellwood DR, Hoey AS, Choat JH (2003) Limited functional redundancy in high diversity systems: resilience and ecosystem function on coral reefs. Ecol Lett 6:281–285
Brown CJ, Hamilton RJ (2018) Estimating the footprint of pollution on coral reefs with models of species turnover. Conserv Biol 32:949–958
Brown CJ, Broadley A, Adame MF, Branch TA, Turschwell MP, Connolly RM (2019a) The assessment of fishery status depends on fish habitats. Fish and Fish 20:1–14
Brown CJ, Jupiter SD, Albert S, Anthony KRN, Hamilton RJ, Fredston-Hermann A, Halpern BS, Lin H, Maina J, Mangubhai S, Mumby PJ, Possingham HP, Saunders MI, Tulloch VJD, Wenger A, Klein CJ (2019b) A guide to modelling priorities for managing land-based impacts on coastal ecosystems. Journal of Applied Ecology. https://doi.org/10.1111/1365-2664.13331
Chan T, Sadovy Y, Donaldson TJ (2012) Bolbometopon muricatum. The IUCN Red List of Threatened Species 2012: e.T63571A17894276. http://dx.doi.org/10.2305/IUCN.UK.2012.RLTS.T63571A17894276.en. Downloaded 11 November 2018
Choat JH, Pears R (2003) A rapid, quantitative survey method for large, vulnerable reef fishes. In: Wilkinson C, Green A, Almany J, Dionne S (eds) Monitoring coral reef marine protected areas. A practical guide on how monitoring can support effective management MPAs. Australian Institute of Marine Science and the IUCN Marine Program Publication, Townsville, pp 54–55
Choat JH, Davies CR, Ackerman JL, Mapstone BD (2006) Age structure and growth in a large teleost, Cheilinus undulatus, with a review of size distribution in labrid fishes. Mar Ecol Prog Ser 318:237–246
Cinner JE, Marnane MJ, McClanahan TR (2005) Conservation and community benefits from traditional coral reef management at Ahus Island, Papua New Guinea. Conserv Biol 19:1714–1723
Cohen PJ, Alexander TJ (2013) Catch rates, composition and fish size from reefs managed with periodically-harvested closures. PLoS One 8:e73383
Colin PL, de Mitcheson YS (2012) Humphead wrasse—Cheilinus undulatus. In: Colin PL, de Mitcheson YS (eds) Reef fish spawning aggregations: biology, research and management. Springer Fish and Fisheries Series, vol 35. Springer Science + Business Media, New York, pp 478–487
Davis AD, Wagner JR (2003) Who knows? On the importance of identifying “experts” when researching local ecological knowledge. Hum Ecol 31:463–489
Donaldson TJ, Dulvy NK (2004) Threatened fishes of the world: Bolbometopon muricatum (Valenciennes 1840) (Scaridae). Environ Biol Fish 70:373
Dulvy NK, Polunin NVC (2004) Using informal knowledge to infer human-induced rarity of a conspicuous reef fish. Anim Conserv 7:365–374
Ensor JE, Abernethy KE, Hoddy ET, Aswani S, Albert S, Vaccaro I, Benedict JJ, Beare DJ (2018) Variation in perception of environmental change in nine Solomon Islands communities: implications for securing fairness in community-based adaptation. Reg Environ Change 18:1131–1143
Fenner D (2014) Fishing down the largest coral reef fish species. Mar Pollut Bull 84:9–16
Fisheries Management Prohibited Activates (2018) Supplement to this Gazettee: Legal Notice No. 61. Schedule 3, p. 186. Printed on 27th August 2018 under the Authority of the Solomon Islands Government. Honiara, Solomon Islands. Pacific Printers Limited
Foale SJ (1998) Assessment and management of the trochus fishery at West Nggela, Solomon Islands: an interdisciplinary approach. Ocean Coast Manag 40:187–205
Foale S, Cohen P, Januchowski-Hartley S, Wenger A, Macintyre M (2011) Tenure and taboos: origins and implications for fisheries in the Pacific. Fish Fish 12:357–369
Govan H, Tawake A, Tabunakawai K, Jenkins A, Lasgorceix A, Schwarz AM, Aalbersberg B, Manele B, Vieux C, Notere D, Afzal D (2009) Status and potential of locally-managed marine areas in the South Pacific: meeting nature conservation and sustainable livelihood targets through wide-spread implementation of LMMAs: Study Report
Green AL, Maypa AP, Almany GR, Rhodes KL, Weeks R, Abesamis RA, Gleason MG, Mumby PJ, White AT (2015) Larval dispersal and movement patterns of coral reef fishes, and implications for marine reserve network design. Biol Rev 90:1215–1247
Hamilton RJ (2003) The role of indigenous knowledge in depleting a limited resource—a case study of the bumphead Parrotfish (Bolbometopon muricatum) artisanal fishery in Roviana Lagoon, Western Province, Solomon Islands. In: Putting fishers’ knowledge to work conference proceedings, vol 11 no. 1, 27–30 Aug 2001. University of British Columbia, Canada. Fish Cent Res Rep, pp 68–77
Hamilton RJ (2005) The demographics of bumphead Parrotfish (Bolbometopon muricatum) in lightly and heavily fished regions of the Western Solomon Islands. Ph.D. Thesis, University of Otago, Dunedin, New Zealand, p 273
Hamilton RJ, Choat JH (2012) Bumphead parrotfish: Bolbometopon muricatum. In: de Mitcheson YS, Colin PL (eds) Reef fish spawning aggregations: biology, research and management. Springer fish and fisheries series, vol 35. Springer Science + Business Media, New York, pp 490–496
Hamilton RJ, Adams S, Choat JH (2008) Sexual development and reproductive demography of the green humphead parrotfish (Bolbometopon muricatum) in the Solomon Islands. Coral Reefs 27:153–163
Hamilton RJ, Potuku T, Montambault JR (2011) Community-based conservation results in the recovery of reef fish spawning aggregations in the Coral Triangle. Biol Conserv 144:1850–1858
Hamilton RJ, Giningele M, Aswani S, Ecochard JL (2012a) Fishing in the dark—local knowledge, night spearfishing and spawning aggregations in the Western Solomon Islands. Biol Conserv 145:246–257
Hamilton R, de Mitcheson YS, Aguilar-Perera A (2012b) The role of local ecological knowledge in the conservation and management of reef fish spawning aggregations. In: de Mitcheson YS, Colin PL (eds) Reef fish spawning aggregations: biology, research and management. Springer fish and fisheries series, vol 35. Springer Science + Business Media, New York, pp 331–370
Hamilton RJ, Almany GR, Stevens D, Bode M, Pita J, Peterson NA, Choat JH (2016) Hyperstability masks declines in bumphead parrotfish (Bolbometopon muricatum) populations. Coral Reefs. 35:751–763
Hamilton RJ, Almany GR, Brown CJ, Pita J, Peterson NA, Choat JH (2017) Logging degrades nursery habitat for an iconic coral reef fish. Biol Conserv 210:273–280
Halpern BS, Selkoe KA, White C, Albert S, Aswani S, Lauer M (2013) Marine protected areas and resilience to sedimentation in the Solomon Islands. Coral Reefs 32:61–69
IUCN. (2012). Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41 pp
IUCN Standards and Petitions Subcommittee (2017) Guidelines for using the IUCN Red List categories and criteria: version 13. Prepared by the Standards and Petitions Subcommittee. http://www.iucnredlist.org/documents/RedListGuidelines.pdf
Johannes RE, Lam M (1999) The live reef food fish trade in the Solomon Islands. SPC Live Reef Fish Inf Bull 5:8–15
Jupiter SD (2017) Culture, kastom and conservation in Melanesia: what happens when worldviews collide? Pac Conserv Biol 23:139–145
Jupiter S, McCarter J, Albert S, Hughes A, Grinham A (2019) Solomon Islands: Coastal and marine ecosystems. In: World seas: an environmental evaluation (pp. 855–874). Academic Press
Larsen SN, Leisher C, Mangubhai S, Muljadi A, Tapilatu RF (2018) Fisher perceptions of threats and fisheries decline in the heart of the Coral Triangle. Ocean Life 2:41–46
Lavides MN, Molina EPV, de la Rosa GE, Mill AC, Rushton SP, Stead SM, Polunin NVC (2016) Patterns of coral-reef finfish species disappearances inferred from fishers’ knowledge in global epicentre of marine shorefish diversity. PLoS One 11:e0155752
Lindfield SJ, McIlwain JL, Harvey ES (2014) Depth refuge and the impacts of SCUBA spearfishing on coral reef fishes. PLoS One 9:e92628
McClure EC, Richardson LE, Graba-Landry A, Loffler Z, Russ GR, Hoey AS (2019) Cross-shelf differences in the response of herbivorous fish assemblages to severe environmental disturbances. Diversity 11(2):23
McElreath R (2016) Statistical Rethinking: A Bayesian Course with Examples in R and Stan, vol 122. CRC Press, Boca Raton
McMahon KW, Berumen ML, Mateo I, Elsdon TS, Thorrold SR (2011) Carbon isotopes in otolith amino acids identify residency of juvenile snapper (family: Lutjanidae) in coastal nurseries. Coral Reefs 30:1135–1145
Mills M, Pressey RL, Weeks R, Foale S, Ban NC (2010) A mismatch of scales: challenges in planning for implementation of marine protected areas in the Coral Triangle. Conserv Lett 3:291–303
Moseby KE, Labere JP, Read JL (2012) Landowner surveys inform protected area management: a case study from Tetepare Island, Solomon Islands. Hum Ecol 40:227–235
Olds AD, Connolly RM, Pitt KA, Maxwell PS, Aswani S, Albert S (2014) Incorporating surrogate species and seascape connectivity to improve marine conservation outcomes. Conserv Biol 28:982–991
Pauly D, Hilborn R, Branch TA (2013) Fisheries: does catch reflect abundance? Nature 494:303–306
Pearse AR, Hamilton RJ, Choat JH, Pita J, Almany G, Peterson NA, Hamilton GS, Peterson EE (2018) Giant coral reef fishes display markedly different susceptibility to night spearfishing. Ecol Evol. https://doi.org/10.1002/ece3.4501
Read JL, Argument D, Moseby KE (2010) Initial conservation outcomes of the Tetepare Island protected area. Pac Conserv Biol 16:173–180
Rhodes KL, Hernandez-Ortiz DX, Cuetos-Bueno J, Ioanisc M, Washington W, Ladore R (2018) A 10-year comparison of the Pohnpei, Micronesia, commercial inshore fishery reveals an increasingly unsustainable fishery. Fish Res 204:156–164
Russell, B. (Grouper & Wrasse Specialist Group) 2004. Cheilinus undulatus. The IUCN Red List of Threatened Species 2004: e.T4592A11023949. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T4592A11023949.en. Downloaded 11 November 2018
Sadovy Y, Kulbicki M, Labrosse P, Letourneur Y, Lokani P, Donaldson TJ (2003) The humphead wrasse, Cheilinus undulatus: synopsis of a threatened and poorly known giant coral reef fish. Rev Fish Biol Fish 13:327–364
Stan Development Team (2018). RStan: the R interface to Stan. R package version 2.17.3. http://mc-stan.org/
Taylor BM, Hamilton RJ, Almany GR, Choat JH (2018) The world’s largest parrotfish has slow growth and a complex reproductive ecology. Coral Reefs. https://doi.org/10.1007/s00338-018-1723-9
Thompson CP, Skowronski JJ, Larsen SF, Betz A (1996) Autobiographical memory: remembering what and remembering when. L. Erlbaum Associates, Mahwah
Vincent ACJ, Sadovy de Mitcheson YJ, Fowler SL, Lieberman S (2014) The role of CITES in the conservation of marine fishes subject to international trade. Fish Fish 15:563–592
Weiant P, Aswani S (2006) Early effects of a community-based marine protected area on the food security of participating households. SPC Traditional Marine Resource Management and Knowledge Information Bulletin 19:16–30
Weeks R, Russ GR, Alcala AC, White AT (2010) Effectiveness of marine protected areas in the Philippines for biodiversity conservation. Conserv Biol 24:531–540
Westneat MW, Alfaro ME (2005) Phylogenetic relationships and evolutionary history of the reef fish family Labridae. Mol Phylogenet Evol 36:370–390
Zilio MI, London S, Perillo GM, Piccolo MC (2013) The social cost of dredging: The Bahia Blanca Estuary case. Ocean Coast Manag 71:195–202
Acknowledgements
We would like to express our sincere thanks to Ezekiel Kama for his humour and for captaining our dive boats on numerous occasions. RH extends his gratitude to the late Margert and Bailey Kama, for accepting him and his wife Sarah into their wider Nusabanga family in 2000. We are also grateful to all the Roviana spearfishermen of past and present who shared their local knowledge on Topa with us. We thank Professor Howard Choat for reviewing and improving and earlier version of this paper and Nate Peterson for producing Fig. 1. CJB was supported by the Global Wetlands Program and a Discovery Early Career Researcher Award (DE160101207) from the Australian Research Council.
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Hamilton, R.J., Hughes, A., Brown, C.J. et al. Community-based management fails to halt declines of bumphead parrotfish and humphead wrasse in Roviana Lagoon, Solomon Islands. Coral Reefs 38, 455–465 (2019). https://doi.org/10.1007/s00338-019-01801-z
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DOI: https://doi.org/10.1007/s00338-019-01801-z