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Ninety-five per cent of world's fish hide in mesopelagic zone

RATE THIS! +24
Posted in Science on 3rd Mar, 2014 11:56 PM by AlexMuller

An international team of marine biologists has found mesopelagic fish in the earth's oceans constitute 10 to 30 times more biomass than previously thought. UWA Professor Carlos Duarte says mesopelagic fish, fish that live between 100 and 1000m below the surface, must therefore constitute 95 per cent of the world's fish biomass.

 

"Because the stock is much larger it means this layer must play a more significant role in the functioning of the ocean and affecting the flow of carbon and oxygen in the ocean," he says.
 
Prof Duarte led a seven-month circumnavigation of the globe in the Spanish research vessel Hesperides, with a team of scientists collecting echo-soundings of mesopelagic fish.
 
He says most mesopelagic species tend to feed near the surface at night, and move to deeper layers in the daytime to avoid birds. They have large eyes to see in the dim light, and also enhanced pressure-sensitivity.
 
"They are able to detect nets from at least five metres and avoid them," he says. "Because the fish are very skilled at avoiding nets, every previous attempt to quantify them in terms of biomass that fishing nets have delivered are very low estimates.

Tags: fishmarine biologybiologynatureoceanenvionment

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Comments

Author: Guest
Posted: 2014-03-04
+2
This is very good news. It is great to know that there is more fish than previously estimated and also this points to a need to research more and find and catalog marine life better before we make any regulation - about fishing, for example
2 Replies
Author: Guest
Posted: 2014-03-04
+3
Yes, this is a very large stock of fish that researchers just discovered and this also shows that the oceans are healthier than we previously thought Reply
Author: Guest
Posted: 2014-03-04
+0
As for fishing- it seems this stock can't be harvested with nets. There will be other ways ..... Reply
Reply
Author: Guest
Posted: 2014-03-04
+2
We should be careful with all ocean layers. Just recently there was an article that "Seafloor Marine Life Face Major Threat from Climate Change" Reply
Author: Guest
Posted: 2015-07-29
+0
MitchellandpaigeWe appreciate you taikng the time to enter our contest and am sory you are having problems.We just realized that perhaps you may have been clicking the like button on the right sidebar as opposed to the inline Like button that appears in the body of the entry page. Clicking the right sidebar like button would not reload the page and reveal the entry form, so we have removed that to avoid further confusion.I have created a comment below to show the what you should be seeing if you has yet to like our page and reveal the entry form.Please try again and tell us if you have any further problems. Reply


 

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