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John Dory

Zeus faber

Method of production - Caught at sea
Capture method - Demersal otter trawl
Capture area - North East Atlantic (FAO 27)
Stock area - All Areas
Stock detail - I- IX
Accreditation -
Fish type - White round 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

John Dory is moderately vulnerable to exploitation but is not actively targeted, it is generally taken as bycatch in trawl nets. As an unregulated or unprotected species there is potential for landing and marketing of immature fish. However, as John Dory is not a typical 'round fish', regulations in trawl mesh are largely deemed ineffective. Avoid eating immature fish (less than 35cm) and during their breeding season, June-August.

Biology

John Dory has a distinctive appearance with its laterally compressed body and large dark "eyespot". It usually lives a solitary life or is found in small schools in inshore waters. They become sexually mature at an age of around 4 years and at a length of 29-35cm. Spawns in June-August off the coasts of southern England, earlier in the Mediterranean. It can reach lengths of 70cm and has a maximum age of about 12 years.

Stock information

Stock area
All Areas

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Stock information
There is no specific information available regarding John Dory as there is no directed fishery for this species. Although a valuable species, its habits are such that landings are sporadic. Studies suggest that the eastern Channel, southern North Sea and the Irish sea can be regarded as seasonal nursery grounds for this species. John Dory is considered an under-utilised species. Under-utilised species are ones that fishermen don't catch their full quota of; or they catch them but then discard the fish because no one wants to buy them. CEFAS have compiled a list of these species using quota and discard information, expert advice and local knowledge and chose around 50 under-utilised species to study. To determine their sensitivity to over-fishing CEFAS has developed a system, the Relative Life History Sensitivity Analysis, to study the risk. It uses biological information like growth and breeding strategies to see how increased fishing pressure might damage each species. They then ranked the species by how tolerant they are to being over-fished. For a full list of the species that are most under-utilised AND most tolerant of over-fishing and therefore the best ones for consumers to consider choosing see www.cefas.defra.gov.uk/our-science/fisheries-information/marine-fisheries/under-utilised-species.aspx

Management

Capture information

John Dory is generally taken as bycatch in trawls. Because it is an unregulated or unprotected species, there is potential for landing and marketing of immature fish.

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.

Mullet, Red, Striped red mullet Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

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

Basa, Tra, Catfish or Vietnamese River Cobbler Depending on how and where it's caught this species ranges from sustainable to unsustainable. Click the name to display only the sustainable options.

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

Bream, Black or porgy or seabream

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

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

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

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

Hake, Cape

Japanese amberjack, Yellowtail or Seriola

Meagre

Pouting or Bib

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

Tilapia

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

Wolffish

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