CE0713 Herring Biomass Assessment Survey

Acoustic data were collected using the Simrad ER60 scientific echosounder. A single pelagic midwater trawl with the dimensions of 19m in length (LOA) and 6m at the wing ends and a fishing circle of 330 m was employed during the survey. All components of the catch from the trawl hauls were sorted and weighed; fish and other taxa were identified to species level. stations were carried out during the survey at predetermined locations along the track.

Oceanographic (CTD) stations were carried out during the survey at predetermined locations along the track. Visual observations for marine mammals and seabirds were conducted during daylight hours. Survey into the abundance and distribution of herring in the southwest of Ireland and Celtic Sea.