Dataset

The International Herring Larvae Surveys

EurOBIS MeasurementOrFact Open in mapper Explore occurrences

The ICES programme of international herring larval surveys in the North Sea and adjacent areas is in operation since 1967. The main purpose of this programme is to provide quantitative estimates of herring larval abundance, which are used as a relative index of changes of the herring spawning‐stock biomass in the assessment. The larvae surveys are carried out in specific periods and areas, following autumn and winter spawning activity of herring from north to south. Catch data together with specific information like haul position, survey area etc. are reported to the ICES International Herring Larvae database annually. The database contains information about the surveys conducted since 1972. The ICES responsible group for the dataset is WGIPS.

Citation: ICES. The International Herring Larvae Surveys. Available online at http://eggsandlarvae.ices.dk. Consulted on yyyy-mm-dd.

Published: September 09, 2024 at 17:31

URL: http://ipt.vliz.be/eurobis/resource?r=ihls

International Council for the Exploration of the Sea
International Council for the Exploration of the Sea

Flanders Marine Institute (VLIZ)
Flanders Marine Institute (VLIZ)

36,898
occurrence records
9,532
measurements and facts
2
taxa
1
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 36,898
100.0%
maximumDepthInMeters 33,338
90.4%
minimumDepthInMeters 36,898
100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 33,338
90.4%
ON_LAND 68
0.2%
DEPTH_EXCEEDS_BATH 7
0.0%

Measurement types

DNA derived data