Pollack

Pollachius pollachius

Pollack by Sarah McCartney

Image | by Sarah McCartney, Copyright Cornwall Wildlife Trust

Description

Pollack are closely related to cod, and they can grow very big! Their flesh is not as white in colour but is very similar in taste and texture to cod. They live near to the sea bed around rocky reefs and wrecks. Pollack is becoming increasingly popular, look out for handline caught pollack which is the higest quality and most sustainable option available.


Sustainability Overview

More research is needed on pollack stocks but they are thought to be healthy in Cornwall. The gear used has an impact on the sea bed but improvements such as square mesh panels and CCTV prove that fishermen are improving the way they operate. Seek out fish from trawlers that work with scientists to research ways to improve their sustainability.

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When is best to eat?

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Gill Netting

Cornish vessels landing to Cornish ports

Gill nets are lightweight nets made of nylon (monofilament) fishing line that are anchored to the seabed and are used to catch fish by entangling the gills.

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Demersal Trawl

Cornish vessels landing to Cornish ports

Demersal trawls are large nets that are pulled through the water with the bottom edge of the net touching the seabed. At each edge the net is

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Handlining

Cornish vessels landing to Cornish ports

Handlining is a simple fishing method where hooks on lines are used to catch fish in a very traditional and sustainable way.

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How we rate fish

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Cornwall Good Seafood Guide rates fish on sustainability using a scale of 1 to 5.

1, 2 and 3 are recommended, Fish to avoid are rated 5.

We use the system devised by the Marine Conservation Society (MCS) so our scores are comparable with the scores produced by MCS for the UK and fisheries from all around the world. For more information on scoring click here.

Sustainability Overview

More research is needed on pollack stocks but they are thought to be healthy in Cornwall. The gear used has an impact on the sea bed but improvements such as square mesh panels and CCTV prove that fishermen are improving the way they operate. Seek out fish from trawlers that work with scientists to research ways to improve their sustainability.

Pollack by Sarah McCartney

Biology

Distributed throughout the northeast Atlantic, pollack is a warm, temperate species belonging to the cod family. It is mostly found close to the shore with a preference for wrecks and rocky bottom. It usually occurs at 40-100 m depth but is found down to 200m.Growth is rapid, approaching 10 cms per year. It migrates into deeper water as it grows. Maturity occurs at approximately 3 years. It spawns between January and April. Young of the first year are particularly common close inshore and may therefore be protected from fisheries in the early life stages. Species can reach a length of 120-130cm. A maximum size of 130 cm, a maximum weight of 18 kg and a maximum age of 15 years are reported. Pollack are moderately vulnerable to fishing 59% (Chueng et al 2005)

Stock Info

Pollack are a difficult species to survey as they live near reefs and wrecks and are thus not easily surveyed using typical trawl methods  the information fisheries scientists have is limited. A limited model called Depletion Corrected Average Catch modelling which uses landings data shows that stocks in area VII have stayed the same for last 20 years (project inshore).MMO landings data shows that catches landed to Cornish ports have remained constant at around 1000 tonnes per year.

Management

Catches are limited by a quota set by the EU common fisheries policy. There is a minimum landing soze of 30cm. 

Capture Info

Pollack are caught by gill netters around rocks and reefs. So called wreck netting is very risky and can result in gear being lost and ghost fishing. Pollack are also caught in demersal trawls and rarely in beam trawls. 
Due to increased prices handline fishing for Pollack is becoming more common. Handlining using hook and line is a very selective method, with virtually zero by catch. Pollack landed by handline fishermen in Southwest England are tagged by members of the SW handline fishermens association so that there is full traceability. Handlining is relatively inefficient so is unlikely to have a large impact on stocks. Fuel consumption is low so there is a low carbon footprint.  
 

References

Seafish responsible sourcing guides Pollack
 
Project inshore pre-assessment database 
 
WGNEW Report 2014 ICES
 
Cheung, W.W.L., T.J. Pitcher and D. Pauly, 2005. A fuzzy logic expert system to estimate intrinsic extinction vulnerabilities of marine fishes to fishing. Biol. Conserv. 124:97-111 source www.fishbase.org
 
www.fishonline.org.uk
 

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