European Directory of Marine Environmental Data (EDMED)

Data set information

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General
Data set name

Ichthyoplankton in the Central Baltic

Data holding centreLatvian Fish Resources Agency (LATFRA)
CountryLatvia  Latvia
Time period1973-1991. ICES subdivisions 25,26,28 and 29 - Coastal zone of Soviet Union. 1991-2004. ICES subdivision 26 and 28 - Coastal zone of Latvia
OngoingNo
Geographical area

Baltic Sea

Observations 
Parameters

Fish non taxonomy-related abundance per unit volume of the water column; Fish behaviour

Instruments

Plankton nets

Description 
Summary

Sample collections were done in March - August, 3 to 5 surveys per year. Samples were collected at the hydrological stations, since 1992 a standard grid of stations is used. Ichthyoplankton net is operated vertically from the bottom (or 140 m depth in the deepest places) to the water surface; the net is also towed in the surface layer for 10 minutes while vessel is going on circulation at a speed of ca. 3 knots. Data processing: the total of fish eggs and larvae is determined in the whole sample and the total number of eggs and larvae by species per 1 m2 (vertical hauls) or per 10 minutes (towing in the surface layer) is determined.

OriginatorsLatvian Fish Resources Agency (LATFRA)
Availability 
OrganisationLatvian Fish Resources Agency (LATFRA)
AvailabilityBy negotiation
ContactAndrei Makarchouk (Researcher)
Address

Latvian Fish Resources Agency (LATFRA)
Daugavgrivas str. 8
Riga

LV-1048
Latvia

Telephone+371 67613775
Facsimile+371 67616946
Emailmaris.vitins@latzra.lv
Administration 
Collating centreLatvian Institute of Aquatic Ecology
Local identifier43002002
Global identifier1467
Last revised2009-01-30