Troubled waters

Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters

Rima W. Jabado, Peter M. Kyne, Riley A. Pollom, David A. Ebert, Colin A. Simpfendorfer, Gina M. Ralph, Shaikha S. Al Dhaheri, K. V. Akhilesh, Khadeeja Ali, Mohamud Hassan Ali, Tariq M.S. Al Mamari, K. K. Bineesh, Igbal S. El Hassan, Daniel Fernando, Edwin M. Grandcourt, Muhammad Moazzam Khan, Alec B.M. Moore, Fereidoon Owfi, David P. Robinson, Evgeny Romanov & 5 others Ana Lucia Soares, Julia L.Y. Spaet, Dawit Tesfamichael, Tooraj Valinassab, Nicholas K. Dulvy

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The extinction risk of sharks, rays and chimaeras is higher than that for most other vertebrates due to low intrinsic population growth rates of many species and the fishing intensity they face. The Arabian Sea and adjacent waters border some of the most important chondrichthyan fishing and trading nations globally, yet there has been no previous attempt to assess the conservation status of species occurring here. Using IUCN Red List of Threatened Species Categories and Criteria and their guidelines for application at the regional level, we present the first assessment of extinction risk for 153 species of sharks, rays and chimaeras. Results indicate that this region, home to 15% of described chondrichthyans including 30 endemic species, has some of the most threatened chondrichthyan populations in the world. Seventy-eight species (50.9%) were assessed as threatened (Critically Endangered, Endangered or Vulnerable), and 27 species (17.6%) as Near Threatened. Twenty-nine species (19%) were Data Deficient with insufficient information to assess their status. Chondrichthyan populations have significantly declined due to largely uncontrolled and unregulated fisheries combined with habitat degradation. Further, there is limited political will and national and regional capacities to assess, manage, conserve or rebuild stocks. Outside the few deepsea locations that are lightly exploited, the prognosis for the recovery of most species is poor in the near-absence of management. Concerted national and regional management measures are urgently needed to ensure extinctions are avoided, the sustainability of more productive species is secured, and to avoid the continued thinning of the regional food security portfolio.

    Original languageEnglish
    Pages (from-to)1043-1062
    Number of pages20
    JournalFish and Fisheries
    Volume19
    Issue number6
    Early online date15 Aug 2018
    DOIs
    Publication statusPublished - Nov 2018

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    chimera
    Arabian Sea
    extinction risk
    chimerism
    shark
    sharks
    extinction
    traditional foods
    threatened species
    food security
    water
    prognosis
    population growth
    indigenous species
    vertebrates
    fisheries
    degradation
    fishing
    habitats
    sea

    Cite this

    Jabado, R. W., Kyne, P. M., Pollom, R. A., Ebert, D. A., Simpfendorfer, C. A., Ralph, G. M., ... Dulvy, N. K. (2018). Troubled waters: Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters. Fish and Fisheries, 19(6), 1043-1062. https://doi.org/10.1111/faf.12311
    Jabado, Rima W. ; Kyne, Peter M. ; Pollom, Riley A. ; Ebert, David A. ; Simpfendorfer, Colin A. ; Ralph, Gina M. ; Al Dhaheri, Shaikha S. ; Akhilesh, K. V. ; Ali, Khadeeja ; Ali, Mohamud Hassan ; Al Mamari, Tariq M.S. ; Bineesh, K. K. ; El Hassan, Igbal S. ; Fernando, Daniel ; Grandcourt, Edwin M. ; Khan, Muhammad Moazzam ; Moore, Alec B.M. ; Owfi, Fereidoon ; Robinson, David P. ; Romanov, Evgeny ; Soares, Ana Lucia ; Spaet, Julia L.Y. ; Tesfamichael, Dawit ; Valinassab, Tooraj ; Dulvy, Nicholas K. / Troubled waters : Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters. In: Fish and Fisheries. 2018 ; Vol. 19, No. 6. pp. 1043-1062.
    @article{1004eb7ea5ae4f0abde27fc279fc227d,
    title = "Troubled waters: Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters",
    abstract = "The extinction risk of sharks, rays and chimaeras is higher than that for most other vertebrates due to low intrinsic population growth rates of many species and the fishing intensity they face. The Arabian Sea and adjacent waters border some of the most important chondrichthyan fishing and trading nations globally, yet there has been no previous attempt to assess the conservation status of species occurring here. Using IUCN Red List of Threatened Species Categories and Criteria and their guidelines for application at the regional level, we present the first assessment of extinction risk for 153 species of sharks, rays and chimaeras. Results indicate that this region, home to 15{\%} of described chondrichthyans including 30 endemic species, has some of the most threatened chondrichthyan populations in the world. Seventy-eight species (50.9{\%}) were assessed as threatened (Critically Endangered, Endangered or Vulnerable), and 27 species (17.6{\%}) as Near Threatened. Twenty-nine species (19{\%}) were Data Deficient with insufficient information to assess their status. Chondrichthyan populations have significantly declined due to largely uncontrolled and unregulated fisheries combined with habitat degradation. Further, there is limited political will and national and regional capacities to assess, manage, conserve or rebuild stocks. Outside the few deepsea locations that are lightly exploited, the prognosis for the recovery of most species is poor in the near-absence of management. Concerted national and regional management measures are urgently needed to ensure extinctions are avoided, the sustainability of more productive species is secured, and to avoid the continued thinning of the regional food security portfolio.",
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    author = "Jabado, {Rima W.} and Kyne, {Peter M.} and Pollom, {Riley A.} and Ebert, {David A.} and Simpfendorfer, {Colin A.} and Ralph, {Gina M.} and {Al Dhaheri}, {Shaikha S.} and Akhilesh, {K. V.} and Khadeeja Ali and Ali, {Mohamud Hassan} and {Al Mamari}, {Tariq M.S.} and Bineesh, {K. K.} and {El Hassan}, {Igbal S.} and Daniel Fernando and Grandcourt, {Edwin M.} and Khan, {Muhammad Moazzam} and Moore, {Alec B.M.} and Fereidoon Owfi and Robinson, {David P.} and Evgeny Romanov and Soares, {Ana Lucia} and Spaet, {Julia L.Y.} and Dawit Tesfamichael and Tooraj Valinassab and Dulvy, {Nicholas K.}",
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    Jabado, RW, Kyne, PM, Pollom, RA, Ebert, DA, Simpfendorfer, CA, Ralph, GM, Al Dhaheri, SS, Akhilesh, KV, Ali, K, Ali, MH, Al Mamari, TMS, Bineesh, KK, El Hassan, IS, Fernando, D, Grandcourt, EM, Khan, MM, Moore, ABM, Owfi, F, Robinson, DP, Romanov, E, Soares, AL, Spaet, JLY, Tesfamichael, D, Valinassab, T & Dulvy, NK 2018, 'Troubled waters: Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters', Fish and Fisheries, vol. 19, no. 6, pp. 1043-1062. https://doi.org/10.1111/faf.12311

    Troubled waters : Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters. / Jabado, Rima W.; Kyne, Peter M.; Pollom, Riley A.; Ebert, David A.; Simpfendorfer, Colin A.; Ralph, Gina M.; Al Dhaheri, Shaikha S.; Akhilesh, K. V.; Ali, Khadeeja; Ali, Mohamud Hassan; Al Mamari, Tariq M.S.; Bineesh, K. K.; El Hassan, Igbal S.; Fernando, Daniel; Grandcourt, Edwin M.; Khan, Muhammad Moazzam; Moore, Alec B.M.; Owfi, Fereidoon; Robinson, David P.; Romanov, Evgeny; Soares, Ana Lucia; Spaet, Julia L.Y.; Tesfamichael, Dawit; Valinassab, Tooraj; Dulvy, Nicholas K.

    In: Fish and Fisheries, Vol. 19, No. 6, 11.2018, p. 1043-1062.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Troubled waters

    T2 - Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters

    AU - Jabado, Rima W.

    AU - Kyne, Peter M.

    AU - Pollom, Riley A.

    AU - Ebert, David A.

    AU - Simpfendorfer, Colin A.

    AU - Ralph, Gina M.

    AU - Al Dhaheri, Shaikha S.

    AU - Akhilesh, K. V.

    AU - Ali, Khadeeja

    AU - Ali, Mohamud Hassan

    AU - Al Mamari, Tariq M.S.

    AU - Bineesh, K. K.

    AU - El Hassan, Igbal S.

    AU - Fernando, Daniel

    AU - Grandcourt, Edwin M.

    AU - Khan, Muhammad Moazzam

    AU - Moore, Alec B.M.

    AU - Owfi, Fereidoon

    AU - Robinson, David P.

    AU - Romanov, Evgeny

    AU - Soares, Ana Lucia

    AU - Spaet, Julia L.Y.

    AU - Tesfamichael, Dawit

    AU - Valinassab, Tooraj

    AU - Dulvy, Nicholas K.

    PY - 2018/11

    Y1 - 2018/11

    N2 - The extinction risk of sharks, rays and chimaeras is higher than that for most other vertebrates due to low intrinsic population growth rates of many species and the fishing intensity they face. The Arabian Sea and adjacent waters border some of the most important chondrichthyan fishing and trading nations globally, yet there has been no previous attempt to assess the conservation status of species occurring here. Using IUCN Red List of Threatened Species Categories and Criteria and their guidelines for application at the regional level, we present the first assessment of extinction risk for 153 species of sharks, rays and chimaeras. Results indicate that this region, home to 15% of described chondrichthyans including 30 endemic species, has some of the most threatened chondrichthyan populations in the world. Seventy-eight species (50.9%) were assessed as threatened (Critically Endangered, Endangered or Vulnerable), and 27 species (17.6%) as Near Threatened. Twenty-nine species (19%) were Data Deficient with insufficient information to assess their status. Chondrichthyan populations have significantly declined due to largely uncontrolled and unregulated fisheries combined with habitat degradation. Further, there is limited political will and national and regional capacities to assess, manage, conserve or rebuild stocks. Outside the few deepsea locations that are lightly exploited, the prognosis for the recovery of most species is poor in the near-absence of management. Concerted national and regional management measures are urgently needed to ensure extinctions are avoided, the sustainability of more productive species is secured, and to avoid the continued thinning of the regional food security portfolio.

    AB - The extinction risk of sharks, rays and chimaeras is higher than that for most other vertebrates due to low intrinsic population growth rates of many species and the fishing intensity they face. The Arabian Sea and adjacent waters border some of the most important chondrichthyan fishing and trading nations globally, yet there has been no previous attempt to assess the conservation status of species occurring here. Using IUCN Red List of Threatened Species Categories and Criteria and their guidelines for application at the regional level, we present the first assessment of extinction risk for 153 species of sharks, rays and chimaeras. Results indicate that this region, home to 15% of described chondrichthyans including 30 endemic species, has some of the most threatened chondrichthyan populations in the world. Seventy-eight species (50.9%) were assessed as threatened (Critically Endangered, Endangered or Vulnerable), and 27 species (17.6%) as Near Threatened. Twenty-nine species (19%) were Data Deficient with insufficient information to assess their status. Chondrichthyan populations have significantly declined due to largely uncontrolled and unregulated fisheries combined with habitat degradation. Further, there is limited political will and national and regional capacities to assess, manage, conserve or rebuild stocks. Outside the few deepsea locations that are lightly exploited, the prognosis for the recovery of most species is poor in the near-absence of management. Concerted national and regional management measures are urgently needed to ensure extinctions are avoided, the sustainability of more productive species is secured, and to avoid the continued thinning of the regional food security portfolio.

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    KW - extinction risk

    KW - fisheries

    KW - IUCN Red List

    KW - population decline

    KW - species diversity

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