Fishing Down Marine Food Webs
1998; American Association for the Advancement of Science; Volume: 279; Issue: 5352 Linguagem: Inglês
10.1126/science.279.5352.860
ISSN1095-9203
AutoresDaniel Pauly, Villy Christensen, Johanne Dalsgaard, Rainer Froese, Francisco Torres,
Tópico(s)Coral and Marine Ecosystems Studies
ResumoThe 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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