| Zoaelite |
12-10-2011 06:40 PM |
Quote:
Originally Posted by MarkoD
(Post 659392)
i have no idea whats going on in the maritimes. but i find it hard to believe that humans could ever strip the entire ocean of a certain type of fish
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Quote:
Originally Posted by Lampshade
(Post 659399)
+1, the earth has been around a lot longer than we have, with many species going extinct long before we showed up. It's like global warming, we measure temperatures for a hundred years, notice it's going up, and say it's because of us. What about the other million's of years?
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Sorry gentlemen but your being flat out ignorant if you actually believe what you just posted.
This was an article in Science now for May of 2003, there are 1000's of articles with countless hours of study put into them all detailing vastly similar results. Do yourself a favor and go do some scholarly searches on the topic prior to posting garbage like this. Ignorance is bliss and it also happens to be highly contagious.
Quote:
Swordfish, tuna, and other predatory fish species have plunged to 10% of their abundance before industrialized fishing, according to a new global analysis. It confirms smaller studies showing that overfishing has decimated certain fish species and gives a baseline estimate of earlier population numbers that should aid in conservation.
Many studies have documented the decline of coastal marine species, from sea turtles to rockfish, but pinning down large-scale changes of fish populations in the open ocean has proved more elusive. And those oceanic studies have usually focused on individual species fished beyond recovery, such as Canada's Atlantic cod. Partly because of the difficulty of estimating population size for far-traveling fish, few studies have looked for global changes. Many have relied on estimates of unexploited abundance that are too low, because they were calculated after fishing had already begun to impact stocks.
To get at global trends, fisheries biologists Ransom Myers and Boris Worm at Dalhousie University in Nova Scotia, Canada, analyzed a range of existing data, they report in the 15 May issue of Nature. They got hold of records from Japanese oceanic fishing expeditions that use kilometer-long lines with hundreds of baited hooks. These trips have covered all open ocean except the polar seas. For fish that live in the shallower waters over the continental shelf, the researchers used data from research cruises. They found that while the vessels caught six to 12 large fish per 100 hooks whenever longliners began fishing, the catch dropped to .5 to two fish per 100 hooks in the first 10 years of fishing in a given region. On average, populations have plummeted to a tenth of their former abundance from prefishing times.
“I think what this paper gives is a magic number,” says Jeremy Jackson, a marine ecologist at the Scripps Institution of Oceanography. By giving a solid estimate of worldwide declines, Jackson says, the study makes a case for aggressive, international conservation of remaining stocks.
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Quote:
Originally Posted by MarkoD
(Post 659361)
I think it's just bologna. There isn't that many people with saltwater aquariums in the world that it would cause a fish to become extinct.
Look at tuna for example; almost everyone in the world eats tuna, and it's nowhere near extinction.
I think the expression "there's plenty of fish in the sea" literally holds true
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Would you like to back up this statement with some proof? Nowhere near extinction eh?
Quote:
Bluefin tuna have been eaten by humans for centuries. However, in the 1970s, demand and prices for large bluefins soared worldwide, particularly in Japan, and commercial fishing operations found new ways to find and catch these sleek giants. As a result, bluefin stocks, especially of large, breeding-age fish, have plummeted, and international conservation efforts have led to curbs on commercial takes. Nevertheless, at least one group says illegal fishing in Europe has pushed the Atlantic bluefin populations there to the brink of extinction.
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-From National Geographic.
http://freshfromqatar.marvivablog.co...oberto-mielgo/
That link alone has over 15 full length scholarly reports detailing how ridiculous your statement was. Go read at least a few of them before you come back and post nonsense as such. |
