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tahir
Joined: 28 Oct 2004 Posts: 45676 Location: Essex
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Jonnyboy
Joined: 29 Oct 2004 Posts: 23956 Location: under some rain.
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tahir
Joined: 28 Oct 2004 Posts: 45676 Location: Essex
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judith
Joined: 16 Dec 2004 Posts: 22789 Location: Montgomeryshire
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crackapple
Joined: 19 Jun 2005 Posts: 204 Location: teeside
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dougal
Joined: 15 Jan 2005 Posts: 7184 Location: South Kent
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Posted: Fri Aug 26, 05 10:54 am Post subject: |
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tahir wrote: |
Jonnyboy wrote: |
I'm not sure about shellfish farming, will have to look into it a bit more, but as they are filter feeders I assume that sustainable water quality is a far greater priority. |
From my understanding I believe that most mollusc farming in the UK relies on little or no inputs and is carried out quite sustainably |
As well as being low-input and improving water quality, farming obviates the wholesale habitat destruction of bottom trawling. No question, such farming is 'a good thing'.
I refer again to
https://www.thefishlist.org/thelist.shtml
which is a US site that brings together the recommendations of a number of environmental, conservation (and even medical) groups on this very subject.
I have no problem agreeing that salmon farming has a considerable room for environmental improvement.
I have to wonder whether the farming of 'bottom-feeders' in conjunction with salmon, and possibly moluscs too, might result in a more efficient use of resources and less environmental impact... Wouldn't do anything much for the escapee problem though.
I'm surprised not to have noticed anything about bio-control of sea lice, rather than chemical control... is there a natural sea lice predator? That could itself be farmed?
A major fish farming problem is the input of fishmeal.
A lot of European fishmeal came from sand eels. These have been industrially over-fished to the point that the EU has banned the practice in the North Sea for now. (The effects had been visible for a few years in low numbers and malnourishment of those seabirds that also depend on the sand eel.)
However, only some fishmeal comes from sand eels.
And only some fishmeal goes to fish farming. (IMHO a better use than making fertiliser out of it.)
I note, in passing that "The Fish List" praises wild North Atlantic prawns and (US) farmed tilapia and striped bass... |
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tahir
Joined: 28 Oct 2004 Posts: 45676 Location: Essex
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Jonnyboy
Joined: 29 Oct 2004 Posts: 23956 Location: under some rain.
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mick ball
Joined: 26 Nov 2006 Posts: 36 Location: DONCASTER sth yorks
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Bunnykiller
Joined: 04 May 2005 Posts: 56 Location: Brixham S.Devon
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Jonnyboy
Joined: 29 Oct 2004 Posts: 23956 Location: under some rain.
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dpack
Joined: 02 Jul 2005 Posts: 46247 Location: yes
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Gus
Joined: 06 Dec 2006 Posts: 38 Location: scottish borders
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doctoral
Joined: 19 Oct 2006 Posts: 697 Location: Now in Surrey ... I need a good avatar
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cab
Joined: 01 Nov 2004 Posts: 32429
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