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Fishing down marine food webs
Pauly, D.; Christensen, V.; Dalsgaard, J.; Froese, R.; Torres Jr., F. (1998). Fishing down marine food webs. Science (Wash.) 279: 860-863
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Peer reviewed article  

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Keywords

Authors  Top 
  • Pauly, D., more
  • Christensen, V.
  • Dalsgaard, J.
  • Froese, R., more
  • Torres Jr., F.

Abstract
    The mean trophic level of the species groups reported in Food and Agricultural Organization global fisheries statistics declined from 1950 to 1994. This reflects a gradual transition in landings from long-lived, high trophic level, piscivorous bottom fish toward short-lived, low trophic level invertebrates and planktivorous pelagic fish. This effect, also found to be occurring in inland fisheries, is most pronounced in the Northern Hemisphere. Fishing down food webs (that is, at lower trophic levels) leads at first to increasing catches, then to a phase transition associated with stagnating or declining catches. These results indicate that present exploitation patterns are unsustainable.

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