30.06.2014 Views

Gurnards - Seafish

Gurnards - Seafish

Gurnards - Seafish

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Research & Development<br />

Species guide<br />

March 2011 2 nd edition<br />

<strong>Gurnards</strong><br />

<strong>Gurnards</strong> belong to the Triglidae family (1) of<br />

fish. There are three common species: red,<br />

yellow/tub and grey gurnard. They vary by<br />

colour but are very similar in shape and taste.<br />

Red gurnard<br />

Distribution<br />

Red gurnard is widely distributed in the<br />

North East Atlantic from southern Norway<br />

and north to Mauritania.<br />

Red gurnard, Aspitrigla cuculus, is the<br />

smallest of the European gurnards. It spawns<br />

in summer, can attain a length of 40 cms, a<br />

weight of 900g and lives to a maximum of 21.<br />

Tub gurnard<br />

Tub gurnard occurs in the Eastern Atlantic<br />

from Norway to Senegal, also in South Africa<br />

and in the Mediterranean Sea.<br />

Tub gurnard, Chelidonicthys lucerna, is the<br />

largest European. It spawns from May to July,<br />

can attain a length of 75 cms and lives to a<br />

maximum of 15 years.<br />

Grey gurnard<br />

Grey gurnard occurs in the Eastern Atlantic<br />

from Iceland, in Norway, the southern Baltic<br />

and the North Sea to southern Morocco.<br />

Grey gurnard, Eutrigla gurnardus, spawns<br />

from April to August, can attain a length of 45<br />

cms and lives to a maximum of six years.


2 Species Guide – <strong>Gurnards</strong>. March 2011 v2.<br />

Biology<br />

<strong>Gurnards</strong> are able to grunt or growl by using<br />

muscles associated with the swim bladder<br />

and this is believed to aid in keeping schools<br />

together. They feed on benthic crustaceans,<br />

other invertebrates and bottom-dwelling<br />

fishes.<br />

Fisheries and gears<br />

Red gurnard is mainly caught in a mixed<br />

fishery by otter trawlers. Tub and grey<br />

gurnard are mainly taken as a bycatch in<br />

mixed demersal fisheries for flatfish and<br />

roundfish.<br />

However the market for gurnard is limited and<br />

they are often thrown back into the sea as an<br />

unwanted bycatch and subsequently<br />

discarded. Surveys indicate that this species<br />

is one of the most widely discarded (3).<br />

Stock assessment and catches<br />

There are no formal assessments or advice<br />

on gurnards However, there are a number of<br />

sources of information on these species and<br />

their role in the ecosystem (4,5,6).<br />

According to landings statistics the annual<br />

catches in the North East Atlantic from 2006-<br />

2009 have been (2):<br />

Tonnes 2006 2007 2008 2009<br />

Red 5171 5175 4778 4055<br />

Tub 2995 3416 2510 3058<br />

Grey 529 399 317 438<br />

There are uncertainties in landings data and<br />

some nations do not discriminate between<br />

the species in the landings data.<br />

Red gurnard – French fishing vessels land<br />

the most red gurnard and it is data from these<br />

and research vessels which provide the best<br />

time series for this species. Information is<br />

available for the Bay of Biscay, Celtic Sea,<br />

Western Approaches, English Channel and<br />

North Sea. Most of these time series indicate<br />

fluctuations in abundance without trends, with<br />

the exception of the North Sea where there<br />

appears to have been an upward trend in the<br />

last decade.<br />

Tub gurnard – As for red gurnard, French<br />

trawl fisheries and research vessel data<br />

provide the best time series for this species.<br />

Information is available for the Bay of Biscay,<br />

Celtic Sea, Western Approaches, English<br />

Channel and North Sea. Most of these results<br />

indicate fluctuation in abundance without<br />

trend with some evidence of increasing<br />

numbers of tub gurnard overwintering in the<br />

North Sea in recent years. This effect has<br />

been observed with other species such as<br />

red mullet which until recently did not<br />

overwinter in the North Sea.<br />

Grey gurnard – Due to their low commercial<br />

value there is widespread discarding of this<br />

species so only research vessel data can be<br />

considered a valid source of information. The<br />

research vessel surveys in the North Sea<br />

show a marked increase in abundance over<br />

the period 1987-2009, and relatively stable,<br />

though fluctuating abundance in the<br />

Skagerrak and Kattegat.<br />

Ecological aspects<br />

<strong>Gurnards</strong> are key predators in the North Sea<br />

and their importance is considered to have<br />

increased over recent years (4).<br />

Sustainability<br />

Taken together the information described<br />

above suggests that gurnard populations are<br />

relatively robust; that is current exploitation is<br />

not likely to seriously affect their abundance.<br />

Responsible Sourcing Services<br />

This guide is one of a series of <strong>Seafish</strong><br />

Responsible Sourcing Guides.<br />

See:<br />

http://www.tinyurl.com/seafishrsg


3 Species Guide – <strong>Gurnards</strong>. March 2011 v2.<br />

Product Characteristics<br />

<strong>Gurnards</strong> are very distinctive bottom-living<br />

fish with large heads and eyes. The head is<br />

protected by large bony plates and strong<br />

spines. The lower three rays of the pectoral<br />

fins are separate, finger-like processes that<br />

contain sensory organs.<br />

Red gurnards are bright red with pinkishsilver<br />

mottling on the sides and head. The<br />

protective bony plates on the head which are<br />

characteristic of all gurnards are very<br />

conspicuous in this species. Along the lateral<br />

line there is a row of large, plate-like scales.<br />

Tub gurnards can vary in colour from bright<br />

red with pinkish mottling to yellowish-brown<br />

with darker brown or green mottling. The<br />

pectoral fins have brilliant peacock blue spots<br />

and outer rim.<br />

The grey gurnard is a relatively slender<br />

bodied gurnard with a sharply pointed snout.<br />

The colour ranges from grey to greyish-brown<br />

with small whitish-cream spots and there is a<br />

characteristic dark blotch on the rear edge of<br />

the first dorsal fin.<br />

<strong>Gurnards</strong> are most commonly used in fish<br />

stocks, soups or Mediterranean fish stews. It<br />

may be marketed fresh or frozen and eaten<br />

pan-fried, broiled, micro-waved or baked.<br />

The Gurnard is a tricky fish to fillet and<br />

‘debone’, but has been gaining in popularity.<br />

The red gurnard was the winner of the<br />

Billingsgate School Sustainable Seafood<br />

Award 2008 (7) and has been increasingly<br />

endorsed by celebrity chefs. There is a recipe<br />

for red gurnard in Rick Stein’s Mediterranean<br />

Escapes (BBC Books, 2007). The River<br />

Cottage Fish Book by Hugh Fearnley-<br />

Whittingstall and Nick Fisher (Bloomsbury,<br />

2007) includes red gurnard recipes for ‘Potroasted<br />

gurnard’, as a whole white fish in<br />

‘Crustacean soup’ and a descaled and gutted<br />

red gurnard for cooking as ‘Deep-fried whole<br />

fish with citrus salsa’.<br />

Supply chain standards<br />

<strong>Seafish</strong> has developed supply chain<br />

standards from capture to retailer:<br />

• Responsible Fishing Scheme.<br />

Sets best practice standards for<br />

fishing vessels: (BSi: PAS 72:2006).<br />

• British Retail Consortium (BRC)<br />

Global Standard/Safe and Local<br />

Supplier Approval (SALSA)<br />

certification. Designed to raise<br />

standards in the seafood processing<br />

and wholesaling sectors.<br />

References and sources<br />

1.www.food.gov.uk/foodindustry/guidancenotes/la<br />

belregsguidance/fishlabellingregs2010eng<br />

2. www.ices.dk/fish/CATChSTATISTICS.asp<br />

3. Enever R et al 2007 Fisheries Research 86<br />

(2007) 143–152.<br />

4. Mackinson S and G. Daskalov (2007) Sci.<br />

Ser. Tech Rep., Cefas Lowestoft, 142: 196pp.<br />

5.www.ices.dk/reports/ACOM/2007/WGNEW/WG<br />

NEW07.pdf<br />

6.www.ices.dk/reports/ACOM/2010/WGNEW/WG<br />

NEW%202010%20.pdf<br />

7.www.seafoodtraining.org/6_mike_berhtet_m&j_<br />

seafood_27.02.08.pdf<br />

Contact:<br />

Bill Lart - Tel: 01472 252323<br />

Email: w_lart@seafish.co.uk<br />

Karen Green - Email: k_green@seafish.co.uk<br />

18 Logie Mill, Logie Green Road, Edinburgh EH7 4HS<br />

t: 0131 558 3331 f: 0131 558 1442<br />

e: seafish@seafish.co.uk w: www.seafish.org SIN: http://sin.seafish.org<br />

supporting the seafood industry for a sustainable, profitable future

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!