Cruise inventory

FRV Scotia 0812S

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Scotia (748S)
Cruise identifier0812S
Cruise period2012-06-30 — 2012-07-19
StatusCompleted
Port of departureAberdeen, United Kingdom
Port of returnAberdeen, United Kingdom
PurposeFisheries
ObjectivesObjectives

1. To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and north of Scotland between 58°30'-62°N and from the shelf edge to 2°E, excluding Faroese waters.
2. To obtain biological samples for echosounder trace identification using a pelagic trawl.
3. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection.
4. To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring.

Narrative

Scotia departed Aberdeen at 0900 on 30 June and made passage for Scapa Flow, Orkney Islands, to commence calibration of acoustic systems. Two trial deployments of fishing gear took place en route to familiarize crew with fishing gear and to set up the new netsonde systems onboard. Scanmar distance units were used to confirm that the addition of dropper chains to the footrope of the gear had no significant effect on the net geometry.

Calibration took place between 0030 and 0800 on 1 July. The survey commenced at 1200. Numerous fish traces were seen throughout the South Eastern area in particular and fishing took place as appropriate. Fishing was generally successful throughout the first half of the survey and herring were caught in all hauls. Poor weather on 7 July restricted the vessel speed and precluded fishing operations for 24 hours. (The netsonde cable having parted due to the swell height when fishing had been attempted). In order to avoid the poor weather an attempt was made at a second calibration of acoustic systems in the evening of 8 July in Hope Wick at the South end of Bressay. Unfortunately, there was insufficient shelter from the 40 knot winds and the calibration was abandoned in the early hours of 9 July. Scotia made her way into Lerwick at 0900 on 9 July for her 24 hour half landing and to change scientific and compliance staff. R Catarino also joined the vessel during this period.

Scotia departed Lerwick at 0900 on 10 July and was able to recommence surveying as the weather had greatly improved. Scotia's planned survey track had to be reduced in the Northern part of the survey area to compensate for the time lost to weather. However, transects undertaken by the accompanying charter vessel ensured that sampling densities still met the required minimum for the survey in this area. As in previous surveys, few fish traces were seen through the Northern area.

Few traces were seen on the western side of the survey area and these were fished where tidal conditions and seabed topography allowed.
Chief scientistPhilip J Copland (Marine Scotland Aberdeen Marine Laboratory)
ProjectRV1206 (20090)
Cruise reportFRV Scotia 0812S cruise report 0812s.pdf — access key 'C' (0.12 MB) 
Ocean/sea areas 
GeneralNorth Sea
North East Atlantic Ocean (limit 40W)
SpecificNorth western North Sea. North of Scotland between 58º30’-62ºN and from the shelf edge to 2ºE
Track chartsFRV Scotia 0812S cruise track — 0812strk.pdf (00 MB) 
Data held at BODC 
Series/Profiles 
41  CTD/STD cast
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature of the water column
Reference numbers
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature of the water column
Reference numbers

BODC idDate/TimeLocationDoc.
11813682012-07-13 00:08 61° 27' 36" N  1° 7' 10" W  View metadata report for BODC series reference number 1181368
11813812012-07-13 12:40 60° 32' 41" N  2° 54' 7" W  View metadata report for BODC series reference number 1181381
11813932012-07-13 19:28 60° 17' 15" N  3° 21' 13" W  View metadata report for BODC series reference number 1181393
11814002012-07-13 22:10 60° 17' 31" N  2° 33' 22" W  View metadata report for BODC series reference number 1181400
11814122012-07-14 07:13 60° 2' 16" N  1° 33' 20" W  View metadata report for BODC series reference number 1181412
11814242012-07-14 19:03 59° 48' 13" N  4° 13' 28" W  View metadata report for BODC series reference number 1181424
11814482012-07-15 22:10 59° 32' 26" N  5° 12' 57" W  View metadata report for BODC series reference number 1181448
11814732012-07-16 19:24 59° 2' 28" N  3° 58' 34" W  View metadata report for BODC series reference number 1181473
11814852012-07-17 06:11 59° 2' 40" N  5° 28' 16" W  View metadata report for BODC series reference number 1181485
11815162012-07-17 20:39 58° 47' 19" N  5° 9' 46" W  View metadata report for BODC series reference number 1181516
11815282012-07-17 22:09 58° 47' 31" N  4° 51' 15" W  View metadata report for BODC series reference number 1181528
11815412012-07-18 06:17 58° 47' 18" N  3° 28' 58" W  View metadata report for BODC series reference number 1181541
11810922012-07-01 10:29 58° 32' 28" N  2° 59' 35" W  View metadata report for BODC series reference number 1181092
11811352012-07-02 09:54 58° 32' 36" N  0° 15' 28" E  View metadata report for BODC series reference number 1181135
11811472012-07-02 18:05 58° 32' 59" N  1° 37' 34" E  View metadata report for BODC series reference number 1181147
11811592012-07-03 10:50 58° 47' 27" N  0° 28' 53" W  View metadata report for BODC series reference number 1181159
11811722012-07-04 09:07 59° 2' 31" N  0° 2' 31" E  View metadata report for BODC series reference number 1181172
11811842012-07-04 19:56 59° 17' 21" N  1° 1' 0" E  View metadata report for BODC series reference number 1181184
11812152012-07-05 19:54 59° 32' 58" N  0° 42' 27" W  View metadata report for BODC series reference number 1181215
11812272012-07-05 22:28 59° 32' 21" N  0° 2' 21" E  View metadata report for BODC series reference number 1181227
11812392012-07-06 13:56 59° 47' 28" N  1° 4' 2" E  View metadata report for BODC series reference number 1181239
11812522012-07-08 03:51 60° 17' 8" N  1° 44' 0" E  View metadata report for BODC series reference number 1181252
11812642012-07-08 11:47 60° 15' 54" N  0° 3' 22" E  View metadata report for BODC series reference number 1181264
11813192012-07-10 22:20 60° 32' 31" N  1° 3' 49" E  View metadata report for BODC series reference number 1181319
11813202012-07-11 10:58 61° 22' 28" N  1° 52' 12" E  View metadata report for BODC series reference number 1181320
11813442012-07-12 15:50 61° 0' 43" N  0° 37' 47" W  View metadata report for BODC series reference number 1181344
11814972012-07-17 09:43 59° 2' 24" N  6° 29' 45" W  View metadata report for BODC series reference number 1181497
11811112012-07-01 15:08 58° 32' 34" N  2° 35' 8" W  View metadata report for BODC series reference number 1181111
11811962012-07-05 07:13 59° 17' 30" N  0° 54' 1" W  View metadata report for BODC series reference number 1181196
11812882012-07-10 11:15 60° 30' 38" N  0° 55' 39" W  View metadata report for BODC series reference number 1181288
11812762012-07-08 15:16 60° 17' 18" N  0° 50' 26" W  View metadata report for BODC series reference number 1181276
11813322012-07-12 06:55 61° 20' 35" N  0° 2' 3" E  View metadata report for BODC series reference number 1181332
11814362012-07-14 22:11 59° 47' 21" N  3° 17' 19" W  View metadata report for BODC series reference number 1181436
11815042012-07-17 15:34 58° 47' 25" N  6° 19' 53" W  View metadata report for BODC series reference number 1181504
11811232012-07-01 19:46 58° 32' 7" N  1° 50' 52" W  View metadata report for BODC series reference number 1181123
11811602012-07-03 22:25 59° 2' 25" N  1° 46' 41" W  View metadata report for BODC series reference number 1181160
11812032012-07-05 13:36 59° 28' 55" N  2° 4' 13" W  View metadata report for BODC series reference number 1181203
11812402012-07-06 23:19 59° 47' 22" N  1° 4' 59" W  View metadata report for BODC series reference number 1181240
11813072012-07-10 15:58 60° 32' 28" N  0° 1' 0" E  View metadata report for BODC series reference number 1181307
11813562012-07-12 19:42 60° 46' 27" N  1° 9' 31" W  View metadata report for BODC series reference number 1181356
11814612012-07-16 12:28 59° 17' 37" N  4° 5' 25" W  View metadata report for BODC series reference number 1181461