FRV Scotia 1701S
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Scotia (748S) |
| Cruise identifier | 1701S |
| Cruise period | 2001-11-19 — 2001-12-01 |
| Status | Completed |
| Port of departure | Aberdeen, United Kingdom |
| Port of return | Aberdeen, United Kingdom |
| Purpose | Research |
| Objectives | 1. To assess the performance of the newly designed small mesh cod-end cover with respect to its effect, if any, on the geometry and water flow in the cod-end of the trawl.
2. To obtain quantitative information on fish populations in the mouth of the trawl using the Reson Seabat mounted on the RCTV along with simultaneous video footage using the SIT and CCD cameras, where possible, to give information on species identification. 3. To mount low light CCD cameras on the trawl extension in order to make quantitative counts of fish passing into the cod-end which can be correlated with cod-end and cover catches. 4. Time permitting, to indirectly assess whole gear selectivity by changing either ground gear or altering sweep lengths and monitoring consequent changes in catch composition. |
| Chief scientist | David G Reid (Fisheries Research Services Aberdeen Marine Laboratory) |
| Cruise report |  (0.08 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | North Sea, Moray Firth, East Orkney |
| Measurements | |
| Physical oceanography | |
| Optics (eg underwater light levels) | Quantity: number of profiles = 17 Description: Log lux. Profiles of light intensity through the water column using photomultiplier |
| Biology and fisheries | |
| Zoobenthos | Quantity: number of hauls = 25 Description: GOV hauls (30 min) where catch was worked up as per IBTS protocols |
| Demersal fish | Quantity: number of hauls = 25 Description: GOV hauls (30 min) where catch was worked up as per IBTS protocols |
| Acoustic reflection on marine organisms. | Quantity: number of hauls = 21 Description: GOV hauls where acoustic data collected using a multibeam sonar on fish populations in the mouth of the net |
| Gear research | Quantity: number of deployments = 2 Description: Instrument tows collecting data on water flow and warp tensions at different towing speeds. |
| Other biological/fisheries measurement | Quantity: number of stations = 8 Description: Video footage of fish passing into the mouth and along the extension of the GOV |
