Cruise inventory

FRV Alba Na Mara 0909A

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Alba Na Mara (74NM)
Cruise identifier0909A
Cruise period2009-06-04 — 2009-06-17
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeFisheries
ObjectivesObjectives

1. To carry out an acoustic survey to determine an abundance estimate for sandeels in the in the water column. Three frequencies, 38, 120, and 200 kH were used to aid species recognition. This acoustic survey also produced herring and sprat abundance estimates. Concentrations of fish were sampled using the pelagic trawl to determine species composition and length frequency distributions. Sub samples of the fish caught were weighed and had otoliths removed to establish length-weight relationships and age composition.

2. To carry out a demersal trawl survey to determine an abundance index for sandeels in the seabed sediment. This demersal trawl survey also produced abundance indices for herring and sprats, the two other main prey species, as well as abundance indices for the major piscivorous fish predators in the area, whiting, haddock and cod. At each trawl station, the length frequency of all fish species caught was determined. Sub-samples of sandeels, herring, sprats, cod, haddock, and whiting were weighed to determine length-weight relationships. Otoliths were removed from sandeels and clupeids to determine age composition. Sub-samples of the gadoid predators were retained and frozen for subsequent dietary and age composition analysis if required.

3. Simultaneously with the demersal trawl survey, to carry out hydrographic survey using a Seabird 19 CTD sampler fitted with a fluorometer to determine spatial variation in water temperature, salinity and fluoroescence across the study area.

4. Simultaneously with the acoustic survey, to survey seabirds at sea within the study area using standard census methods. Protection of local breeding seabirds was one of the principal motives underpinning the sandeel fishery closure.

5. Whilst carrying out seabird at sea survey, to record all sightings of marine mammals (number of animals, species if possible, and their location).

Narrative

Scientific equipment was lo
Chief scientistSimon Greenstreet (Marine Scotland Aberdeen Marine Laboratory)
ProjectAE11D
Cruise reportFRV Alba Na Mara 0909A cruise report 0909a.pdf — access key 'C' (0.13 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificFirth of Forth
Track chartsFRV Alba Na Mara 0909A cruise track — 0909atrk.pdf (00 MB) 
Data held at BODC 
Series/Profiles 
41  CTD/STD cast
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
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.
10248722009-06-05 05:08 56° 27' 25" N  1° 48' 16" W  View metadata report for BODC series reference number 1024872
10248842009-06-05 06:04 56° 22' 25" N  1° 40' 3" W  View metadata report for BODC series reference number 1024884
10248962009-06-05 07:11 56° 17' 46" N  1° 31' 7" W  View metadata report for BODC series reference number 1024896
10249032009-06-05 08:21 56° 17' 9" N  1° 39' 59" W  View metadata report for BODC series reference number 1024903
10249152009-06-05 10:06 56° 17' 31" N  1° 49' 16" W  View metadata report for BODC series reference number 1024915
10249272009-06-06 07:31 56° 27' 47" N  2° 7' 52" W  View metadata report for BODC series reference number 1024927
10249392009-06-06 08:22 56° 27' 12" N  2° 0' 10" W  View metadata report for BODC series reference number 1024939
10249402009-06-06 09:41 56° 22' 33" N  1° 57' 1" W  View metadata report for BODC series reference number 1024940
10249522009-06-06 11:08 56° 22' 11" N  1° 50' 17" W  View metadata report for BODC series reference number 1024952
10249642009-06-06 13:24 56° 17' 17" N  1° 59' 42" W  View metadata report for BODC series reference number 1024964
10249762009-06-06 14:09 56° 17' 43" N  2° 8' 5" W  View metadata report for BODC series reference number 1024976
10249882009-06-07 05:45 56° 7' 11" N  2° 30' 28" W  View metadata report for BODC series reference number 1024988
10250032009-06-07 06:31 56° 2' 34" N  2° 29' 41" W  View metadata report for BODC series reference number 1025003
10250152009-06-07 07:15 56° 2' 40" N  2° 22' 7" W  View metadata report for BODC series reference number 1025015
10250272009-06-07 09:03 56° 2' 31" N  2° 10' 11" W  View metadata report for BODC series reference number 1025027
10250392009-06-07 09:49 56° 2' 27" N  2° 3' 31" W  View metadata report for BODC series reference number 1025039
10250402009-06-07 12:46 56° 7' 24" N  2° 0' 13" W  View metadata report for BODC series reference number 1025040
10250522009-06-07 13:35 56° 8' 40" N  2° 7' 53" W  View metadata report for BODC series reference number 1025052
10250642009-06-07 15:24 56° 7' 25" N  2° 20' 4" W  View metadata report for BODC series reference number 1025064
10250762009-06-08 04:08 56° 12' 24" N  2° 30' 0" W  View metadata report for BODC series reference number 1025076
10250882009-06-08 05:10 56° 11' 34" N  2° 20' 21" W  View metadata report for BODC series reference number 1025088
10251072009-06-08 06:55 56° 12' 27" N  2° 10' 0" W  View metadata report for BODC series reference number 1025107
10251192009-06-08 07:50 56° 12' 27" N  1° 59' 40" W  View metadata report for BODC series reference number 1025119
10251202009-06-08 09:25 56° 12' 23" N  1° 49' 43" W  View metadata report for BODC series reference number 1025120
10251322009-06-08 10:00 56° 9' 16" N  1° 51' 18" W  View metadata report for BODC series reference number 1025132
10251442009-06-08 11:37 56° 2' 39" N  1° 49' 50" W  View metadata report for BODC series reference number 1025144
10251562009-06-08 12:20 56° 2' 10" N  1° 42' 35" W  View metadata report for BODC series reference number 1025156
10251682009-06-08 14:04 56° 7' 5" N  1° 39' 31" W  View metadata report for BODC series reference number 1025168
10251812009-06-08 14:45 56° 6' 53" N  1° 32' 31" W  View metadata report for BODC series reference number 1025181
10251932009-06-09 04:13 56° 2' 25" N  1° 29' 39" W  View metadata report for BODC series reference number 1025193
10252002009-06-09 04:57 56° 2' 39" N  1° 23' 38" W  View metadata report for BODC series reference number 1025200
10252122009-06-09 06:45 56° 7' 38" N  1° 20' 29" W  View metadata report for BODC series reference number 1025212
10252242009-06-09 07:49 56° 12' 34" N  1° 30' 7" W  View metadata report for BODC series reference number 1025224
10252362009-06-09 08:32 56° 13' 22" N  1° 37' 58" W  View metadata report for BODC series reference number 1025236
10252482009-06-09 11:58 56° 22' 20" N  2° 10' 6" W  View metadata report for BODC series reference number 1025248
10252612009-06-09 12:59 56° 17' 38" N  2° 20' 13" W  View metadata report for BODC series reference number 1025261
10252732009-06-09 13:49 56° 17' 17" N  2° 29' 48" W  View metadata report for BODC series reference number 1025273
10252852009-06-10 06:03 56° 22' 1" N  2° 22' 4" W  View metadata report for BODC series reference number 1025285
10252972009-06-10 06:44 56° 22' 34" N  2° 29' 35" W  View metadata report for BODC series reference number 1025297
10253042009-06-10 07:27 56° 27' 36" N  2° 31' 45" W  View metadata report for BODC series reference number 1025304
10253162009-06-10 08:59 56° 27' 36" N  2° 20' 13" W  View metadata report for BODC series reference number 1025316