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    Ongoing decline of shark populations in the Eastern Red Sea

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    Type
    Article
    Authors
    Spaet, Julia L.Y. cc
    Nanninga, Gerrit B. cc
    Berumen, Michael L. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Coastal and Marine Resources Core Lab
    Environmental Science and Engineering Program
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2016-06-30
    Online Publication Date
    2016-06-30
    Print Publication Date
    2016-09
    Permanent link to this record
    http://hdl.handle.net/10754/621457
    
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    Abstract
    Information on the abundance and diversity of Red Sea elasmobranchs is notoriously scarce, even though sharks are among the most profitable fisheries of the region. Effective conservation would ideally entail baselines on pristine conditions, yet no such data is available for the Red Sea. To collect distribution and abundance data on Red Sea elasmobranchs, we conducted a dedicated longline and Baited Remote Underwater Video system (BRUVs) sampling program along the entire Red Sea coast of Saudi Arabia over the course of two years. Both survey techniques were opportunistically employed at central and southern Saudi Arabian (SA) Red Sea reef systems. In addition, BRUVs were employed in the northern SA Red Sea and at selected reef systems in Sudan. Shark catch per unit effort (CPUE) data for BRUVs and longline surveys were compared to published data from non-Red Sea reef systems. This comparison revealed CPUE estimates several orders of magnitude lower for both survey methods in the SA Red Sea compared to other reef systems around the world. Catch per unit effort values of BRUVs on Sudanese reefs on the contrary were within the range of estimates from various locations where sharks are considered common. We argue that decades of heavy fishing pressure on Red Sea marine resources has significantly altered the community structure of SA Red Sea reefs. There is an urgent need to establish effective management strategies for species of highest conservation concern. Our results have the potential to be used as a baseline, if such management strategies were to be established. © 2016 Elsevier Ltd
    Citation
    Spaet JLY, Nanninga GB, Berumen ML (2016) Ongoing decline of shark populations in the Eastern Red Sea. Biological Conservation 201: 20–28. Available: http://dx.doi.org/10.1016/j.biocon.2016.06.018.
    Sponsors
    King Abdullah University of Science and Technology
    Publisher
    Elsevier BV
    Journal
    Biological Conservation
    DOI
    10.1016/j.biocon.2016.06.018
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biocon.2016.06.018
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Environmental Science and Engineering Program; Marine Science Program; Coastal and Marine Resources Core Lab

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