Bjarni Saemundsson B4-2013
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | Bjarni Saemundsson (46BS) |
| Cruise identifier | B4-2013 |
| Cruise period | 2013-06-10 — 2013-06-26 |
| Status | Completed |
| Port of departure | Reykjavík, Iceland |
| Port of return | Reykjavík, Iceland |
| Purpose | Research |
| Objectives | Objectives
The MRI sampling undertaken on board the RV Bjarni Sæmundsson will provide egg data in the area between 59°45´ N to 63°45´ N and 0°15´ W to 22°15´ W during period 5. Also, pelagic hauls were carried out to collect adult mackerel samples to estimate fecundity. These data will be combined to provide a fisheries-independent estimate of the spawning stock biomass of western mackerel and horse mackerel. Methods The sampling of the fish eggs was carried out with "Bongo 60" plankton sampler with a 280 micron mesh sized net and an opening diameter of 60 cm. The amount of water filtered during each haul was measured using a calibrated mechanical flow meter mounted in the opening of the net. The Bongo sampler was deployed on double oblique hauls to maximum depth of 200 m or to within 5 m of the bottom in shallower water. On every station temperature and salinity data were collected with a CTD applied from 0-50 m. Additionally a DST-tag was attached to the Bongo registering temperature and salinity profiles. On the way to the area to be surveyed, additional plankton stations were taken along the transect 62°45´ N. Due to the findings there, the investigation area was expanded further northwest. 2/3 of the plankton samples were sorted for fish eggs during the survey, using the spray method and mackerel eggs were staged according the sampling protocol while 1/3 of the samples were processed in the laboratory after the cruise. For quality assurance sorting of the samples was checked after the survey. In this survey, 4 pelagic trawl hauls were carried out in the sea surface using the pelagic WB trawl. |
| Chief scientist | Bjorn Gunnarsson (Marine Research Institute, Reykjavik) |
| Coordinating body | International Council for the Exploration of the Sea (ICES) |
| Cruise report |  (0.28 MB) |
| NPRC | (1.17 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | 59 45N to 63 45N, 0W to 22 15W |
| Track charts | (0.09 MB) |
