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Thread: Ecology of trawling

  1. #1 Ecology of trawling 
    Forum Radioactive Isotope skeptic's Avatar
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    Item in New Scientist 14 September 2013, page 14.

    Trawlers who rake the sea bed to drag up fish, have been criticised for a long time as being ecological destroyers. It appears that is not always the case. The act of trawling a soft sea bottom turns over the sediment, and encourages the growth of marine worms, which are fish food. Trawling may actually increase fish stocks.

    Of course, this only applies to certain sea bottoms. Trawling over rocky bottoms does not have this effect, and will destroy delicate and long lived deep sea corals.

    Should we change our views towards fishing by trawling?


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  3. #2  
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    NZ has trawler free zones?


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  4. #3  
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    Should we change our views towards fishing by trawling?
    If we had an undertaking from every ship's master concerned that they would only use the equipment when there were ....

    a) no corals on seabed
    b) no seagrass meadows on seabed
    c) no kelp forests on seabed
    d) no other vulnerable structures or systems on seabed ...

    then that would be just fine and dandy.

    However, fishing vessels are having trouble getting fish / making a profit already. Climate Change Devastating Ocean Fisherman: 'Sometimes We'll Catch 5,000 Pounds Of Jellyfish' | ThinkProgress I'd not put much stock in such an undertaking. Remember, the only reason they need to trawl so much is because other fish stocks are so depleted.
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." Winston Churchill
    "nature is like a game of Jenga; you never know which brick you pull out will cause the whole stack to collapse" Lucy Cooke
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  5. #4  
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    Quote Originally Posted by sculptor View Post
    NZ has trawler free zones?
    No. Do you think we should?

    NZ manages fish stocks with a transferrable quota system. Not perfect, but better than most alternatives.
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  6. #5  
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    yes
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  7. #6  
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    To Sculptor
    I take back my earlier reply.
    NZ has a number of marine reserves where fishing of any kind is not permitted. But not enough.
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  8. #7  
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    That's what I had thought........
    memory being iffy on a good day, i asked.

    If memory serves, it was one of your countrymen who wrote an anti trawling article 2-3-4 years ago.
    Rather convincing if i remember correctly.
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