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The Collapse of the Cod Fishery of the Grand Banks http://www.sjsu.edu/faculty/watkins/grandbanks.htm http://www.sjsu.edu/faculty/watkins/grandbanks.htm "The
by philipkglass 10y ago
The Collapse of the Cod Fishery of the Grand Banks
http://www.sjsu.edu/faculty/watkins/grandbanks.htm http://www.sjsu.edu/faculty/watkins/grandbanks.htm
"The Canadian Department of Fisheries and Oceans (DFO) formulated a mathematical model of the cod fish population which they used to calculate the maximum sustainable yield (MSY). The U.S. government had a similar concept which was called optimal yield. ...
In 1989 the DFO advised that the total allowable catch (TAC) of codfish should be 125,000 tons. The Canadian Minister of Fisheries thought this figure was too low and arbitrarily increased it to 235,000 tons. In the course of DFO management the TAC was often set by negotiation between the DFO, the fishing industry and politicians. The DFO, using their defective model, was setting setting the TAC too high. The politicians responding to pressure from the industry increased the TAC from the already too high figures. The net result was that in the last years of codfishing on the Grand Banks the catch was about 60 percent of the population instead of 16 percent. The collapse was catastrophic.
In January of 1992 the DFO was advising that the TAC should be 185,000 tons. By June of 1992 the DFO was advising that the cod fishing should be stopped."
25 years later, the cod haven't recovered to healthy levels. In 1989 the industry representatives probably thought that getting politicians to discount the scientists' advice was a victory.
- bpodgursky 10y agoI don't mean to in any way challenge the analysis here (obviously the overfishing was catastrophic), but FWIW the atlantic cod fishery is actually recovering (at last): https://www.bostonglobe.com/metro/2016/08/06/after-years-decline-cod-and-community-rebound-newfoundland/oNxKF14RpE47yc65OOAy6O/story.html https://www.bostonglobe.com/metro/2016/08/06/after-years-dec... There was some concern that Cod had been permanently dislodged as a predator in the ecosystem, but there has been good news recently.