Earth's edible fish face extinction
A US scientist predicts that continued over-fishing would lead to the
extinction of the Earth's edible (could be eaten) species of fish and
affect other levels of the food chain.
However, Jeremy Jackson, a senior scientist at the Smithsonian
Tropical Research Institute and the Scripps Institution of Oceanography,
says just the enforcement of fishery regulations would not help prevent
Jackson says certain steps, if taken immediately, might reverse the
demise of the Earth's ocean species. Those measures include establishing
marine reserves, eliminating subsidies for fertiliser use and limiting
fossil fuel consumption.
In addition to the extinction of edible fish species, he said without
the immediate implementation of ocean-protection measures, larger dead
zones and toxic algal blooms may form along the coastal zones of all of
the world's continents, increasing disease outbreaks and inhibiting
vertical mixing of ocean waters.
"Some may say that it is irresponsible to make such predictions
pending further detailed study to be sure of every point," said Jackson.
"However, we will never be certain about every detail, and it would be
irresponsible to remain silent in the face of what we already know."
The study appears in the early online edition of the Proceedings of
the National Academy of Sciences.