1 Ocak 2016 Dergi makalesi Açık Erişim

Froese, Rainer; Coro, Gianpaolo; Kleisner, Kristin; Demirel, Nazli

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{
  "@context": "https://schema.org/", 
  "@id": 57607, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "GEOMAR Helmholtz Ctr Ocean Res, Dusternbrooker Weg 20, D-24105 Kiel, Germany", 
      "name": "Froese, Rainer"
    }, 
    {
      "@type": "Person", 
      "affiliation": "CNR, Ist Sci & Tecnol Informaz A Faedo, Via Moruzzi 1, I-56124 Pisa, Italy", 
      "name": "Coro, Gianpaolo"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Univ British Columbia, Fisheries Ctr, Sea Us Project, 2202 Main Mall, Vancouver, BC V6J 1Z4, Canada", 
      "name": "Kleisner, Kristin"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Istanbul Univ, Inst Marine Sci & Management, Muskule Sok 17, TR-34134 Istanbul, Turkey", 
      "name": "Demirel, Nazli"
    }
  ], 
  "datePublished": "2016-01-01", 
  "description": "The appropriateness of three official fisheries management reference points used in the north-east Atlantic was investigated: (i) the smallest stock size that is still within safe biological limits (SSBpa), (ii) the maximum sustainable rate of exploitation (F-msy) and (iii) the age at first capture. As for (i), in 45% of the examined stocks, the official value for SSBpa was below the consensus estimates determined from three different methods. With respect to (ii), the official estimates of F-msy exceeded natural mortality M in 76% of the stocks, although M is widely regarded as natural upper limit for F-msy. And regarding (iii), the age at first capture was below the age at maturity in 74% of the stocks. No official estimates of the stock size (SSBmsy) that can produce the maximum sustainable yield (MSY) are available for the north-east Atlantic. An analysis of stocks from other areas confirmed that twice SSBpa provides a reasonable preliminary estimate. Comparing stock sizes in 2013 against this proxy showed that 88% were below the level that can produce MSY. Also, 52% of the stocks were outside of safe biological limits, and 12% were severely depleted. Fishing mortality in 2013 exceeded natural mortality in 73% of the stocks, including those that were severely depleted. These results point to the urgent need to re-assess fisheries reference points in the north-east Atlantic and to implement the regulations of the new European Common Fisheries Policy regarding sustainable fishing pressure, healthy stock sizes and adult age/size at first capture.", 
  "headline": "Revisiting safe biological limits in fisheries", 
  "identifier": 57607, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Revisiting safe biological limits in fisheries", 
  "url": "https://aperta.ulakbim.gov.tr/record/57607"
}