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BODC Cruise Metadata Report for FRV Scotia (748S) cruise 1504S

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name FRV Scotia (748S) cruise 1504S
Short name 1504S
Objectives and Narrative Objectives

1. To conduct an acoustic survey to estimate the abundance and distribution of mackerel in the northern North Sea (ICES division IVa).

2. To obtain samples of mackerel for biological analysis, including age, length, weight, sex and maturity.

3. To determine the species composition and target strength of fish in schools using the autonomous echosounder and video rig.

4. To make video observations of the multi-sampling pelagic trawl with the RCTV.

Narrative

Scientific staff joined the vessel at 0900 on 21 October and the vessel departed at 1000. A small meeting was held with all scientists and the ship's fishing mates and navigation officers to explain the objectives of the survey and to describe general operating procedures. The vessel proceeded to Scapa Flow to calibrate the acoustic transducers, however, prior to arrival it was evident that poor weather would prevent a successful exercise and so this was abandoned. The survey commenced on 22 October at 1347 at 6155.5'N 00100'W. Transects progressed southward along lines of latitude, at spacings of 15 or 7.5 nautical miles (nmi) as planned. Problems with the hydraulic systems on the vessel prevented any fishing operations from 2130 on 22 October until 1500 on 25 October. At 1520 on 27 October, an opportunity was taken to calibrate the echosounders due to a break in the [poor] weather in Wick of Grunting, north of Fetlar, Shetland. The vessel docked into Lerwick harbour on 29 October for 24 hours to enable a change of personnel and to give staff their rest day in line with working time directives. The survey resumed at 1432 on 30 October. The first part of the survey was completed at 0656 on 4 November. The second survey commenced immediately, following a zigzag design of the area of higher mackerel abundance along the 200 m contour: this was interlaced with a complementary survey carried out by the Norwegian FRV GO Sars. FRV Scotia completed its survey at 1320 on 5 November, after which the vessel rendezvoused with the GO Sars to carry out an intercalibration exercise starting at 2040. This lasted for approximately 7 hours (73 nmi) covering four transects with each vessel taking the lead alternately. The intercalibration was completed at 0400 on 6 November. The vessel returned to Aberdeen on the morning of 7 November.
Ship FRV Scotia
Departure Port Aberdeen, United Kingdom
Departure Date 2004-10-21
Arrival Port Aberdeen, United Kingdom
Arrival Date 2004-11-07
Principal Scientist(s) Paul G Fernandes (Fisheries Research Services Aberdeen Marine Laboratory)
Responsible Organisation Fisheries Research Services Aberdeen Marine Laboratory
Associated Project(s) MF01ta
IHB Sea Areas Visited North Sea, North East Atlantic Ocean (limit 40W)
Marsden Squares Visited 181;3/216;3/217;1
Work Area Description Orkneys and Shetlands, northern North Sea
Work Area Bounding Polygon 55N,5W; 65N,5W; 65N,5E; 55N,5E; 55N,5W
Southern Limit 55N
Northern Limit 65N
Western Limit 5W
Eastern Limit 5E

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of profiles = 27
Description:  
Biology and fisheries  
Acoustic reflection on marine organisms. Quantity: data volume in gigabytes = 50
Description: acoustic data recorded using a EK60 echosounder (38, 120 and 200 kHz) to detect mackerel  
Pelagic fish Quantity: number of hauls = 16
Description: PT160 pelagic trawl hauls with 2042 mackerel length measurements, 624 mackerel sampled for weight, sex, maturity and otoliths, 1513 herring lengths, 155 blue whiting lengths, 13 saithe lengths, silversides, pearlsides, and a variety of small gadoids. No cod were caught  

Cruise Inventory Mooring/Buoy Operations

No information on datasets is currently available

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
27 CTD/STD cast Electrical conductivity of the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
656373 CTD/STD cast 2004-10-22 23:18Z 61° 55' N, 1° 31' E Click for more
656385 CTD/STD cast 2004-10-24 15:38Z 61° 7' N, 1° 0' E Click for more
656397 CTD/STD cast 2004-10-24 20:31Z 61° 10' N, 0° 28' W Click for more
656404 CTD/STD cast 2004-10-26 09:50Z 60° 42' N, 2° 25' E Click for more
656416 CTD/STD cast 2004-10-26 18:46Z 60° 36' N, 3° 28' E Click for more
656428 CTD/STD cast 2004-10-27 02:36Z 60° 40' N, 1° 51' E Click for more
656441 CTD/STD cast 2004-10-27 07:40Z 60° 40' N, 0° 13' E Click for more
656453 CTD/STD cast 2004-10-27 11:15Z 60° 40' N, 0° 19' W Click for more
656465 CTD/STD cast 2004-10-27 15:32Z 60° 36' N, 0° 48' W Click for more
656477 CTD/STD cast 2004-10-28 11:39Z 60° 25' N, 1° 25' E Click for more
656489 CTD/STD cast 2004-10-28 19:25Z 60° 20' N, 3° 29' E Click for more
656490 CTD/STD cast 2004-10-28 22:52Z 60° 20' N, 2° 33' E Click for more
656508 CTD/STD cast 2004-10-29 06:24Z 60° 10' N, 0° 29' E Click for more
656521 CTD/STD cast 2004-10-30 17:12Z 59° 55' N, 0° 9' W Click for more
656533 CTD/STD cast 2004-10-30 20:16Z 59° 55' N, 0° 37' E Click for more
656545 CTD/STD cast 2004-10-30 21:40Z 59° 55' N, 0° 57' E Click for more
656557 CTD/STD cast 2004-10-31 08:02Z 60° 12' N, 3° 13' E Click for more
656569 CTD/STD cast 2004-10-31 16:43Z 60° 4' N, 3° 11' E Click for more
656570 CTD/STD cast 2004-11-01 06:43Z 60° 49' N, 3° 13' E Click for more
656582 CTD/STD cast 2004-11-01 16:04Z 59° 43' N, 3° 3' E Click for more
656594 CTD/STD cast 2004-11-01 23:25Z 59° 34' N, 2° 52' E Click for more
656601 CTD/STD cast 2004-11-02 08:06Z 59° 40' N, 0° 15' E Click for more
656613 CTD/STD cast 2004-11-02 13:36Z 59° 40' N, 0° 39' E Click for more
656625 CTD/STD cast 2004-11-02 19:37Z 59° 21' N, 0° 22' E Click for more
656637 CTD/STD cast 2004-11-03 02:25Z 59° 21' N, 1° 17' E Click for more
656649 CTD/STD cast 2004-11-03 07:25Z 59° 21' N, 2° 22' E Click for more
656650 CTD/STD cast 2004-11-03 16:09Z 59° 19' N, 3° 31' E Click for more

Project Database

No data currently held for this cruise in the BODC Project Database

References

Track Charts

No track charts currently available

Reports

Cruise Report