Bakkafrost seeks cause of 750,000 dead fish

Fish Farmer - - European News -

BAKKAFROST re­ported the death last month of hun­dreds of thou­sands of fish at one of its salmon farm­ing sites on the Faroe Is­lands, with the pre­cise cause still un­known.

How­ever, it is be­gin­ning to look as if the spread of a po­ten­tially harm­ful al­gae could be at the heart of the prob­lem which has so far killed 750,000 fish.

The big Faroese salmon com­pany said in a state­ment that it had recorded an ‘el­e­vated mor­tal­ity level’ at farm­ing site A-81 Kol­banagjógv on Septem­ber 20.

Bakkafrost added: ‘Ap­prox­i­mately 750,000 fish with an av­er­age weight of 500g live weight died within a cou­ple of hours. The fish at farm­ing site A-81 Kol­banagjógv was re­leased into the sea in June - Au­gust 2018.

‘It has not been pos­si­ble to con­firm the cause of the in­ci­dent, but al­gae phaeo­cys­tis, pseudo-nitzs­cia and het­erosigma were regis­tered in the sea at farm­ing site A-81 Kol­banagjógv on Septem­ber 20 2018, and the al­gae are sus­pected to have caused the mor­tal­ity in­ci­dent.’

All three pos­si­ble causes are forms of al­gae with het­erosigma which is also known as harm­ful al­gal bloom.

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