Cruise inventory

FRV Clupea 0906C Part 1

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0906C Part 1
Cruise period2006-07-03 — 2006-07-12
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnMallaig, United Kingdom
PurposeResearch
ObjectivesObjectives

1. To investigate the distribution of juvenile herring and sprat through the North and South Minch through bottom, or near-bottom trawling. Species composition and length-frequency distributions of all the fish caught will be determined. Sub-samples will be weighed and otolithed to establish age-length and length-weight relationships. Herring samples will be analysed for sex, maturity, Ichthyophonus and Cryptocotyle lingua infection. Sprat samples will be analysed for Lernaeenicus sprattae, L. encrasicoli and Cryptocotyle lingua infection.
2. To collect stomach samples from both herring and sprat to compare summer feeding patterns to the winter patterns to be established from previously collected samples.
3. To collect viscera samples from herring for possible stock ID.

Narrative

Staff joined the Clupea in Fraserburgh on Monday 3 July 2006, from where she sailed at 1130. Clupea proceeded to sail round to the west coast, anchoring overnight in Loch Eriboll. Clupea commenced fishing on the morning of 4 July off Cape Wrath. Trawling positions for each day's fishing were determined, on a daily basis, in consultation with the skipper and from previously documented demersal tows in the area. At each station in Part 1 a bottom trawl of 30 minute duration using the BT158 was carried out, along with an oblique plankton tow, CTD and vertical plankton net dip. The suitability of the ground for towing with the PT154 net was established at each station. The EK500 unit ran throughout each day to enable comparison of marks at station fished and fish caught. Clupea continued to work across and down through the North Minch and find a suitable anchorage each night until the evening of 6 July when she docked in Gairloch to take on fresh water supplies. Clupea then proceeded to work down through Raasay Sound and into the Sound of Sleat on 7 July and then headed for work around the eastern side of the South Minch. Work was restricted to the eastern portion of the South Minch until the half landing due to weather restrictions, working around Coll and Tiree, Mull, Colonsay, Rhum, Eigg, Skye, off Mallaig and into Loch Nevis.

The CTD data could not be uploaded to a PC due to a problem with communication with the SEARAM unit that was unable to be rectified. Unfortunately, some of the data from the final CTD deployments were lost.

A total of 26 demersal tows, 24 double oblique and 24 vertical plankton tows and 26 CTD deployments were performed.

On the evening of 12 July, after completing Part 1 of the survey, Clupea steamed to Mallaig where Emma Hatfield handed over to Steve Hay as SIC. Emma Hatfield then left the ship and used the laboratory car to return to Aberdeen.
Chief scientistEmma Hatfield (Fisheries Research Services Aberdeen Marine Laboratory)
ProjectMFO1Ta
Coordinating bodyFRS
Cruise reportFRV Clupea 0906C Part 1 cruise report 0906c.pdf — access key 'C' (0.03 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
SpecificOff Cape Wrath, North Minch, Raasay Sound, Sound of Sleat, eastern side of the South Minch, Coll and Tiree, Mull Colonsay, Rhum, Eigg, Skye, off Mallaif, and Loch Nevis
Measurements 
Physical oceanography 
CTD stationsQuantity: number of deployments = 26
Description: CTD deployments
Biology and fisheries 
SestonQuantity: number of measurements = 48
Description: 24 double oblique plankton tows and 24 vertical plankton net dips.
Demersal fishQuantity: number of measurements = 26
Description: 26 Demersal tows. A bottom trawl of 30 minute duration using the BT158 was carried out at each station
Demersal fishQuantity: activity duration in days = 9
Description: The EK500 unit ran throughout each day to enable comparison of marks at station fished and fish caught.
Data held at BODC 
Series/Profiles 
34  CTD/STD cast
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Raw light meter output
Temperature of the water column
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Raw light meter output
Temperature of the water column

BODC idDate/TimeLocationDoc.
7233682006-07-04 12:08 58° 35' 50" N  5° 4' 27" W  View metadata report for BODC series reference number 723368
7233812006-07-04 15:06 58° 28' 48" N  5° 25' 41" W  View metadata report for BODC series reference number 723381
7233932006-07-05 08:24 58° 18' 14" N  6° 10' 55" W  View metadata report for BODC series reference number 723393
7234002006-07-05 10:28 58° 16' 40" N  6° 0' 34" W  View metadata report for BODC series reference number 723400
7234122006-07-05 12:58 58° 8' 56" N  5° 54' 20" W  View metadata report for BODC series reference number 723412
7234242006-07-05 15:29 58° 3' 7" N  5° 48' 43" W  View metadata report for BODC series reference number 723424
7234362006-07-06 09:33 57° 51' 25" N  5° 51' 31" W  View metadata report for BODC series reference number 723436
7234482006-07-06 12:18 57° 51' 45" N  6° 6' 28" W  View metadata report for BODC series reference number 723448
7234612006-07-06 14:37 57° 44' 10" N  6° 0' 2" W  View metadata report for BODC series reference number 723461
7234732006-07-06 16:31 57° 43' 43" N  5° 54' 41" W  View metadata report for BODC series reference number 723473
7234852006-07-07 09:36 57° 38' 39" N  6° 1' 10" W  View metadata report for BODC series reference number 723485
7234972006-07-07 11:42 57° 32' 49" N  6° 5' 19" W  View metadata report for BODC series reference number 723497
7235042006-07-07 17:34 57° 2' 13" N  5° 47' 31" W  View metadata report for BODC series reference number 723504
7235162006-07-08 12:49 56° 44' 1" N  6° 28' 27" W  View metadata report for BODC series reference number 723516
7235282006-07-08 15:21 56° 49' 30" N  6° 40' 4" W  View metadata report for BODC series reference number 723528
7235412006-07-09 11:23 56° 15' 10" N  5° 55' 25" W  View metadata report for BODC series reference number 723541
7235532006-07-14 10:01 56° 54' 9" N  6° 25' 53" W  View metadata report for BODC series reference number 723553
7235652006-07-14 12:09 56° 42' 47" N  6° 29' 48" W  View metadata report for BODC series reference number 723565
7235772006-07-15 08:12 56° 17' 31" N  5° 55' 18" W  View metadata report for BODC series reference number 723577
7235892006-07-15 09:36 56° 15' 8" N  5° 56' 25" W  View metadata report for BODC series reference number 723589
7235902006-07-15 11:59 56° 10' 36" N  6° 5' 27" W  View metadata report for BODC series reference number 723590
7236082006-07-15 13:47 56° 7' 37" N  6° 19' 13" W  View metadata report for BODC series reference number 723608
7236212006-07-15 17:09 56° 25' 14" N  6° 39' 41" W  View metadata report for BODC series reference number 723621
7236332006-07-16 10:55 56° 57' 1" N  6° 5' 16" W  View metadata report for BODC series reference number 723633
7236452006-07-16 11:44 56° 56' 42" N  5° 57' 16" W  View metadata report for BODC series reference number 723645
7236572006-07-16 17:51 57° 28' 0" N  6° 6' 38" W  View metadata report for BODC series reference number 723657
7236692006-07-17 08:58 57° 40' 34" N  5° 59' 32" W  View metadata report for BODC series reference number 723669
7236702006-07-17 11:40 57° 53' 14" N  6° 7' 9" W  View metadata report for BODC series reference number 723670
7236822006-07-17 13:28 58° 4' 9" N  5° 43' 22" W  View metadata report for BODC series reference number 723682
7236942006-07-17 17:08 58° 5' 18" N  6° 9' 54" W  View metadata report for BODC series reference number 723694
7237012006-07-18 08:41 58° 16' 30" N  6° 0' 24" W  View metadata report for BODC series reference number 723701
7237132006-07-18 10:48 58° 26' 50" N  5° 51' 20" W  View metadata report for BODC series reference number 723713
7237252006-07-18 13:11 58° 28' 20" N  5° 30' 40" W  View metadata report for BODC series reference number 723725
7237372006-07-18 14:32 58° 29' 37" N  5° 22' 49" W  View metadata report for BODC series reference number 723737