CONTAINMENT SPECIAL
CASE STUDIES
CASE STUDY - 9 WE’VE SORTED IT – OR HAVE WE?
SITUATION: SEAL ATTACK INCIDENT: TWO HOLES MADE IN NET, BUT ONLY ONE WAS REPAIRED
RESPONSE: COMPANY WILL NOW USE DIVERS TO INSPECT NETS
The situation:
In the unfortunate event of a breach of containment, a quick response is essen- tial to help limit the number of escaped fi sh. However, whilst responding quickly, we need to ensure that we’ve fully iden- tifi ed the cause of the incident – and to be aware that there may be more than one.
The incident:
Working 80m circular cages at sea, farm- ers became aware that there had been an escape incident. This had been caused by a seal making a hole in the net. The farmers quickly found the hole in the net at a depth of about 2m from the surface. This was quickly repaired. Whilst bemoaning the initial incident, they had thought they had responded suc- cinctly and appropriately.
And, indeed they had. Except that they were unfortunate enough to have actual- ly suffered two holes in the net – both caused by seals. The second hole was very much deeper – at the base line of the net – and hence remained unidentifi ed. Having secured the fi rst hole they hadn’t inves- tigated the thought that there may be a second hole and hence suffered further fi sh losses.
THE RESPONSE
The company has put in place a policy to help address such a situation. Their ap- proach is that, should they have concerns about a possible hole in the net, they will not initially lift part of the net to investigate and affect repairs as this may inadvertently crowd the fish towards a second hole. Instead, it is now company policy to bring in divers to investigate any possible holes and to help effect any repairs.
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