European Directory of Marine Environmental Data (EDMED)

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Data set name

Mackerel Egg Survey North Atlantic Ocean Celtic Seas Bay of Biscay since 2007

Data holding centreMarine Institute
CountryIreland  Ireland
Time periodFrom 2007 onwards
Geographical area

North Atlantic Ocean, Celtic Seas and Bay of Biscay between Ireland and France.


Horizontal spatial co-ordinates; Date and time; Fish abundance in water bodies; Fish biomass in water bodies; Salinity of the water column; Plankton abundance per unit volume of the water column; Temperature of the water column


CTD; plankton nets


Fish egg and larval surveys were carried out to map spawning grounds and to derive information on the adult spawning stock of Mackerel and Horse Mackerel. Each station has Id, time, date, position, sample and bottom depth, water temperature at 5m, 20m, 50m, 100m and maximum sample depth where appropriate, salinity at 20m, volume of water filtered during the tow, and Stage 1 egg counts for mackerel and horse mackerel. The Mackerel Egg Survey covers marine grounds in the North Atlantic Ocean, Celtic Seas and Bay of Biscay between Ireland and France. The survey has been running since 1977 and therefore provides important information about the distribution and timing of spawning in relation to climate change. Marine Institute surveys have been taking place since 2007 and have been initiated every three years including 2010, 2013 and 2016. At each egg station the GULF plankton sampler was towed on a v-shaped profile to within 5m of the bottom, or a maximum depth of 200m, whichever is greater. Data feeds into the stock assessment as fisheries independent information. The Fisheries Ecosystem Advisory Services (FEAS) section of the Marine Institute (Ireland) are part of an international consortium of eight European countries that run the international mackerel and horse mackerel egg surveys. Data complete for surveys completed since 2007.

OriginatorsMarine Institute
Data web site
OrganisationMarine Institute
ContactBrendan O'Hea (Scientific and Technical Officer)

Marine Institute
Co. Galway
H91 R673

Collating centreMarine Institute
Local identifierf0c32fc2-4c5c-11df-9879-0800200c9a66
Global identifier2006
Last revised2017-12-04