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Megrim

Lepidorhombus whiffiagonis

Method of production - Caught at sea
Capture method - Demersal otter trawl
Capture area - North East Atlantic (FAO 27)
Stock area - Celtic Sea and West of Scotland
Stock detail - IVa and VIa
Accreditation -
Fish type - White flat fish

Sustainability rating Click for explaination of rating

This fish, caught by the methods and in the area listed above, is not the most sustainable choice of fish to eat. Click on the rating icon above to read more and on the alternatives tab below to find more sustainable fish to eat.


Sustainability overview

The stock is assessed as healthy and is being harvested sustainably. Avoid eating immature fish (less than 25cm) and during their spawning season (January to April).

Biology

A common flatfish found in shelf seas throughout the northeast Atlantic. Megrim spawns in spring in deep water off Iceland, and between January and April along the edge of the continental shelf to the southwest and west of the British Isles. It is found at depths ranging from 50-800 m, but with the highest abundance around 100-300 m. For both sexes combined, 50% of individuals mature at about 20cm at 2.5 years old. Males reach first maturity at a lower length and age than females. Megrim can attain a length of about 60cm, although more usually 35-45cm, and a maximum age of 14-15 years.

Stock information

Stock area
Celtic Sea and West of Scotland

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Stock information
The stock in this area is assessed as having full reproductive capacity and harvested sustainably. Discard rates are calculated at around 15%. ICES advises that catches should be no more than 7000t in 2014 and 2015. If discard rates do not change this implies landings of no more than 5950 t (4700t in 2013 and 2014).

Management

No specific management objectives are known to ICES for this stock. Because of restictive quotas for anglerfish area misreporting of catches is prevalent. The extent of the problem is unknown and ICES recommends that it be investigated.

Capture information

Megrim are predominantly caught using otter trawls as part of a targeted fishery for monkfish or anglerfish, and as bycatch in fisheries for demersal species such as cod and haddock. Male megrim grow to a smaller maximum size than females, and as a consequence the majority of males in the catch are discarded and the bulk of fish landed is comprised of females. The minimum landing size for megrim in EU waters is 20cm (25cm in Skagerrak/Kattegat). Increased mesh sizes brought in to protect cod are expected to also benefit the megrim population by reducing the bycatch of juveniles.

Read more about capture methods

Alternatives

Based on method of production, fish type, and consumer rating: only fish rated 2 and below are included as an alternative in the list below . Click on a name to show the sustainable options available.

Dab Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

Halibut, Atlantic Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

Halibut, Greenland Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

Halibut, Pacific

Sole, Dover sole, Common sole Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

Turbot Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.


References
ICES Advice 2014, Book 5 http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2014/2014/meg-4a6a.pdf

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