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Krill catch is “probably” sustainable: Antarctic researcher

3 commentsBy Shane Starling , 08-Mar-2011
Last updated on 30-May-2012 at 13:43 GMT2012-05-30T13:43:59Z

Krill:

Krill: "Probably" sustainable

Current krill catches are well below established 'trigger limits' for concern and are “probably” sustainable, a British researcher has said.

Speaking at an omega-3 conference in Bruges, Belgium, last week, British Antarctic Survey’s Simeon Hill noted current yearly catches of 210,000 tonnes was 34 per cent of the trigger limit of 620,000 tonnes, a level established to minimise environmental risk, although Hill called for ongoing spatial, population, environmental and harvesting research.

But data to hand indicated that current activity was “probably sustainable”.

In particular, he said more research was needed into where krill populations are fished, as those in coastal areas may have greater influence on air-breathing predators such as penguins and seals than, for example, populations of fish and whales further out to sea.

The 620,000 tonne trigger figure itself represents 9.3 per cent of a precautionary catch level of 5.61 million tonnes, which projections indicate would affect the species ability to reproduce.

The total omega-3 rich krill biomass is estimated at 60.3 million tonnes.

“Like counting trees except they are invisible and keep moving”

But he cautioned that all sustainability efforts required compromise and did not rule out potential risk to krill populations and those that feed on them such as fish, penguins, seals, whales and albatross.

He noted that sustainability efforts were hampered because of the difficulty in determining the size of marine populations which could be, as the marine biologist, John Shepherd, had put it, “like counting trees except they are invisible and keep moving”.

The Antarctic krill fishery is managed by CCAMLR (Commission for the Conservation of Antarctic Marine Living Resources) and industry players like Aker Biomarine have been involved in ongoing research efforts by allowing CCAMLR researchers to use its craft.

Ecosystem approach

Hill said changes in the environment are affecting the krill population, effects that he said were factored into an “ecosystem approach”.

"Industry and NGOs need to support the full implementation of the ecosystem approach which recognises the ecological role of krill, identifies sensible trade-offs between objectives and takes a precautionary approach to managing risks," he said.

“Sustainability is about managing and limiting these risks. Expansion beyond the ‘trigger level’ requires better data, science and cooperation.”

3 comments (Comments are now closed)

the sum of it

yeah each one of those fisheries are "probably" sustainable but when you take it all together into account then we are just destroying the food web from too many angles.
letis put human health first i mean there are so many people who would be starving if they could not get their omega-3 from krill, this is really important! the problem is, the people who are starving won't have access to the krill, this goes to the well fed ones in the first world.
so marine mammals and fish have to change their feeidng habits and the whole food chain has to rearrange itself so that we can get our omega-3?

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Posted by Barbara
10 March 2011 | 01h452011-03-10T01:45:15Z

Reality Check

Isn't it time we put human health first. Omega 3's are proven to prevent CVD and the phospholipid structure of omega 3's in krill show promise as being more available than the triglyceride structure in fish oil.

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Posted by Tony Moore
08 March 2011 | 22h252011-03-08T22:25:51Z

"Probably" not good enough

Science has made serious wrong calls about wildlife sustainability. As a result several marine mammal populations are starving and collapsing. Penguins are on hard times. Krill is key to the marine food web. Find some way to farm krill and leave the oceans be!

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Posted by Benno Bingstaff
08 March 2011 | 20h072011-03-08T20:07:31Z

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