Global status and conservation potential of reef sharks

  title={Global status and conservation potential of reef sharks},
  author={M. MacNeil and D. Chapman and M. Heupel and C. Simpfendorfer and M. Heithaus and M. Meekan and E. Harvey and J. Goetze and J. Kiszka and M. Bond and Leanne M. Currey-Randall and C. Speed and C. Sherman and M. Rees and Vinay Udyawer and K. I. Flowers and Gina M. Clementi and J. Valentin-Albanese and T. Gorham and M. S. Adam and Khadeeja Ali and F. Pina-Amarg{\'o}s and Jorge A. Angulo-Vald{\'e}s and J. Asher and Laura Garc{\'i}a Barcia and Oc{\'e}ane Beaufort and Cecilie Benjamin and A. Bernard and M. Berumen and S. Bierwagen and Erika Bonnema and Rosalind M. K. Bown and Darcy Bradley and Edd J. Brooks and J. J. Brown and D. Buddo and P. Burke and C. C{\'a}ceres and D. Carde{\~n}osa and J. Carrier and J. Caselle and Venkatesh Charloo and T. Claverie and E. Clua and J. Cochran and Neil Cook and Jessica E. Cramp and Brooke M. D’Alberto and M. de Graaf and Mareike Dornhege and A. Estep and Lanya Fanovich and N. F. Farabaugh and Daniel Fernando and A. Flam and C. Floros and Virginia Fourqurean and R. Garla and K. Gastrich and Lachlan George and R. Graham and T. Guttridge and R. Hardenstine and S. Heck and A. C. Henderson and H. Hertler and R. Hueter and Mohini Johnson and S. Jupiter and Devanshi Kasana and S. Kessel and Benedict Kiilu and Taratu Kirata and B. Kuguru and F. Kyne and T. Langlois and Elodie J. I. L{\'e}d{\'e}e and S. Lindfield and A. Luna-Acosta and J. Maggs and B. M. Manjaji-Matsumoto and A. Marshall and P. Matich and E. McCombs and D. McLean and L. Meggs and Stephen K. Moore and Sushmita Mukherji and Ryan Murray and Muslimin Kaimuddin and S. Newman and J. Nogu{\'e}s and C. Obota and O. O’Shea and K. Osuka and Y. Papastamatiou and N. Perera and B. Peterson and A. Ponzo and Andhika Prasetyo and L. M. S. Quamar and J. Quinlan and A. Ruiz-Abierno and E. Sala and M. Samoilys and M. Sch{\"a}rer-Umpierre and A. Schlaff and N. Simpson and Adam N. H. Smith and Lauren Sparks and A. Tanna and Rub{\'e}n Torres and M. Travers and Maurits van Zinnicq Bergmann and L. Vigliola and J. Ward and A. Watts and Colin Wen and Elizabeth Whitman and A. Wirsing and Aljoscha Wothke and Esteban Zarza-Gonz{\^a}lez and J. Cinner},
Decades of overexploitation have devastated shark populations, leaving considerable doubt as to their ecological status 1 , 2 . Yet much of what is known about sharks has been inferred from catch records in industrial fisheries, whereas far less information is available about sharks that live in coastal habitats 3 . Here we address this knowledge gap using data from more than 15,000 standardized baited remote underwater video stations that were deployed on 371 reefs in 58 nations to estimate… Expand
Anthropogenic pressures on reef-associated sharks in jurisdictions with and without directed shark fishing
Shark populations have declined across the Caribbean region, with negative associations between shark abundance and human population density, open access to fishing, and proximity to large marketsExpand
Shark Conservation – Analysis and Synthesis
A detailed analysis of fishing records shows that the shark species accessible to global fisheries have been depleted for decades; they were already at about 10 percent of their former levels byExpand
Evaluating artisanal fishing of globally threatened sharks and rays in the Bay of Bengal, Bangladesh
Sharks and rays are at risk of extinction globally. This reflects low resilience to increasing fishing pressure, exacerbated by habitat loss, climate change, increasing value in a trade andExpand
Spatial Connectivity and Drivers of Shark Habitat Use Within a Large Marine Protected Area in the Caribbean, The Bahamas Shark Sanctuary
Marine protected areas (MPAs) have emerged as potentially important conservation tools for the conservation of biodiversity and mitigation of climate impacts. Among MPAs, a large percentage has beenExpand
Recent expansion of marine protected areas matches with home range of grey reef sharks
The recent implementation of several orders of magnitude larger MPAs in New Caledonia and abroad show that recent Indo-Pacific MPAs are now sufficiently large to protect the home ranges of this species, including males, across its geographical range. Expand
The biodiversity of fishes at the Islas Marías Biosphere Reserve, Mexico, as determined by baited remote underwater video
The Islas Marías Biosphere Reserve, made up of 4 islands in Pacific waters off central Mexico, supports a large diversity of marine life. However, scientific research was restricted for decades byExpand
Ensuring the Sustainability of Coastal Small-Scale Fisheries at Pitcairn Island (South Pacific) Within a Large Scale No-Take MPA
The Pitcairn Islands, located in the central South Pacific, contain near-pristine marine ecosystems which support unique fish assemblages, together with both endemic and threatened species. PitcairnExpand
Baited Remote Underwater Video Surveys to assess relative abundance of sharks and rays in a long standing and remote marine protected area in the Arabian Gulf
The results show the value of this Sir Bu Nair Island MPA in protecting critical habitats for elasmobranchs while suggesting its limitation in protecting adult life stages and other elasmOBranchs with wider ranging movements that are likely threatened by fishing in waters adjacent to the MPA. Expand
Increased connectivity and depth improve the effectiveness of marine reserves
It is shown that marine reserves that are highly protected (no-take) and designed to optimize connectivity, size and depth range can provide an effective conservation strategy for fished species in temperate and tropical waters within an overarching marine biodiversity conservation framework. Expand
Fossil dermal denticles reveal the preexploitation baseline of a Caribbean coral reef shark community
It is demonstrated that the denticle record can reveal changes in shark communities over long ecological timescales, helping to contextualize contemporary abundances and inform shark management and ecology. Expand


Reef shark declines in remote atolls highlight the need for multi-faceted conservation action
1. The decline of large-bodied predatory species in the oceans is a concern both from a sustainability perspective and because such species can have important ecological roles. Sharks areExpand
Re-Creating Missing Population Baselines for Pacific Reef Sharks
  • M. Nadon, J. Baum, +5 authors R. Brainard
  • Biology, Medicine
  • Conservation biology : the journal of the Society for Conservation Biology
  • 2012
Estimates of shark density from towed-diver surveys were substantially lower than published estimates from surveys along small transects, which suggests that density of reef sharks has declined to 3–10% of baseline levels in these areas. Expand
Global economic value of shark ecotourism: implications for conservation
Abstract Amid declining shark populations because of overfishing, a burgeoning shark watching industry, already well established in some locations, generates benefits from shark protection. WeExpand
Recovery potential of the world's coral reef fishes
The results demonstrate that crucial ecosystem functions can be maintained through a range of fisheries restrictions, allowing coral reef managers to develop recovery plans that meet conservation and livelihood objectives in areas where marine reserves are not socially or politically feasible solutions. Expand
A global overview of shark sanctuary regulations and their impact on shark fisheries
Abstract Due to rapid declines of shark populations across many species and regions of the world, the need for large-scale conservation measures has become widely recognized. Some coastal states haveExpand
Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific
This work modeled three key predator community attributes: vertebrate species richness, mean maximum body size, and shark abundance as a function of geomorphology, environmental conditions, and human pressures and identified refuges at more than 1,250 km from human markets for body size and for shark abundance. Expand
Decline of coastal apex shark populations over the past half century
A unique fisheries-independent dataset from a shark control programme spanning 1760 km of the Australian coastline over the past 55 years is reconstructed, indicating that shark populations are highly vulnerable to exploitation. Expand
Higher Abundance of Marine Predators and Changes in Fishers' Behavior Following Spatial Protection within the World's Biggest Shark Fishery
Fisheries are complex social-ecological systems, where managers struggle to balance the socio-economic interests of fishing communities with the biology and ecology of fisheries species. SpatialExpand
Patterns and ecosystem consequences of shark declines in the ocean.
It is shown that the high natural diversity and abundance of sharks is vulnerable to even light fishing pressure, and that large sharks can exert strong top-down forces with the potential to shape marine communities over large spatial and temporal scales. Expand
Decline of coastal apex shark populations over the past half century.
Overexploitation of large apex marine predators is widespread in the world's oceans, yet the timing and extent of declines are poorly understood. Here we reconstruct a unique fisheries-independentExpand