Marine_Scotland_FishDAC_1726
eng
dataset
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
marinescotland@gov.scot
pointOfContact
2016-05-03
MEDIN Discovery Metadata
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
1007S HERAS North sea herring acoustic survey-Scotia cruise 1007S
HERAS, North sea herring acoustic survey, Scotia, 2007, 1007S
2016-04-07
publication
Marine_Scotland_FishDAC_1726
Daily folders (19) of Simrad format (.raw) acoustic data. 15 daily folders of acoustic data (.ek5 format) from autonomous echo-sounder. 19 Echoview format (EV) format analysis files. Excel biological data for 38 pelagic hauls. CTD data for 45 oblique deployments. NO Excel data for 45 plankton dips.
Objectives
• To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and north of Scotland between 58º15-61.45’N and 4ºW to 2ºE, excluding Faroese waters.
• To obtain biological samples for echo-sounder trace identification using a pelagic trawl.
• To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity, ichthyophonus infection and fat content.
• To obtain hydrographic data for comparison with the horizontal and vertical distribution of herring.
• To obtain plankton samples map the distribution and abundance of zooplankton.
• To obtain in-situ target strength data on herring using the autonomous echo-sounder mounted in a drop frame.
• To obtain live herring and live juvenile haddock for transport back to the laboratory.
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
Mailpoint 11, Area 1B South, Victoria Quay
Edinburgh
EH6 6QQ
United Kingdom
marinescotland@gov.scot
pointOfContact
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
Mailpoint 11, Area 1B South, Victoria Quay
Edinburgh
EH6 6QQ
United Kingdom
marinescotland@gov.scot
custodian
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
Mailpoint 11, Area 1B South, Victoria Quay
Edinburgh
EH6 6QQ
United Kingdom
marinescotland@gov.scot
distributor
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
Mailpoint 11, Area 1B South, Victoria Quay
Edinburgh
EH6 6QQ
United Kingdom
marinescotland@gov.scot
originator
Not Planned
Marine Environmental Data and Information Network
Acoustics
Biota composition
Fish
Water column temperature and salinity
Zooplankton
SeaDataNet Agreed Parameter Groups
2010-10-23
revision
Acoustic backscatter in the water column
Fish abundance in water bodies
Fish biomass in water bodies
Fish morphology, age and physiology
BODC Parameter Discovery Vocabulary
2011-03-25
revision
Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/)
otherRestrictions
no limitations to public access
55000.00
eng
oceans
-4
2
58.5
62
ICES Rectangles
1910-01-01
creation
46E6
ICES Rectangles
1910-01-01
creation
47E6
ICES Rectangles
1910-01-01
creation
48E6
ICES Rectangles
1910-01-01
creation
49E6
ICES Rectangles
1910-01-01
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46E7
ICES Rectangles
1910-01-01
creation
47E7
ICES Rectangles
1910-01-01
creation
48E7
ICES Rectangles
1910-01-01
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49E7
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50E7
ICES Rectangles
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46E8
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47E8
ICES Rectangles
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48E8
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49E8
ICES Rectangles
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50E8
ICES Rectangles
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51E8
ICES Rectangles
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46E9
ICES Rectangles
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creation
47E9
ICES Rectangles
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creation
48E9
ICES Rectangles
1910-01-01
creation
49E9
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creation
50E9
ICES Rectangles
1910-01-01
creation
51E9
ICES Rectangles
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creation
52E9
ICES Rectangles
1910-01-01
creation
46F0
ICES Rectangles
1910-01-01
creation
47F0
ICES Rectangles
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creation
48F0
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creation
49F0
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1910-01-01
creation
50F0
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51F0
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52F0
ICES Rectangles
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46F1
ICES Rectangles
1910-01-01
creation
47F1
ICES Rectangles
1910-01-01
creation
48F1
ICES Rectangles
1910-01-01
creation
49F1
ICES Rectangles
1910-01-01
creation
50F1
ICES Rectangles
1910-01-01
creation
51F1
ICES Rectangles
1910-01-01
creation
52F1
SeaDataNet vertical extent keywords
2010-01-01
revision
The entire body of water between the bed and the atmosphere.
2007-06-29
2007-07-19
https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/
Reference info #0
Electronic - 35.2GB ek60 files, 4.5GB ek5 files - Daily folders (19) of Simrad format (.raw) acoustic data. 15 daily folders of acoustic data (.ek5 format) from autonomous echo-sounder. 19 Echoview format (EV) format analysis files. Excel biological data for 38 pelagic hauls. CTD data for 45 oblique deployments. NO Excel data for 45 plankton dips. Continual Thermosalinograph data.
dataset
Acoustic data will be collected at four frequencies (18, 38, 120 and 200 kHz) between 0300 and 2300 hours. Fish shoals seen on the echosounder will be identified using a pelagic trawl (PT160). Trawling operations will be carried out between two and four times per day; in addition, trawling may also be required between 2300 and 0300 hours to obtain species verification data and length samples for the target strength studies (see below). Samples of all species caught will be measured for length to partition the echo integral amongst species and size classes for target strength functions. Fish will also be weighed to establish a length-weight relationship. Otoliths will be collected from a sub-sample of the herring to determine age; the state of maturity and presence of Icthyophonus infection will also be recorded. The fat content of herring will be measured with a handheld fatmeter. Jellyfish will be counted and a sample taken to measure umbrella diameter.
Where required, a Gulf VII tow will be carried out immediately following a pelagic trawl. The decision to carry this out will be based on achieving at least one CTD & plankton cast in each ICES rectangle. The Gulf VII will be equipped with: a CTD to measure temperature and salinity and zooplankton nets. Only the CTD will be used on every haul. The ships thermosalinograph will be run continuously to obtain sea surface temperature and salinity throughout the survey area.
In-situ target strengths from herring will be obtained by lowering the autonomous echosounder into area where fish schools have been detected using the drop frame. The drop frame will be deployed from the hanger deck and monitored with an onboard camera. This activity will take place between 2300 and 0300. Trawling may be required to obtain biological samples from the fish schools. Passage may be required to suitable locations, but the bridge watch should ensure that at the end of this period (0300) the vessel is at the end point of the survey from the previous night.
In addition, some live herring and live juvenile haddock will be collected using the protected cod end cover. This will take place between the periods 2300 – 0300. The fish will be transferred to holding tanks and offloaded in Aberdeen for transfer to the FRS aquaria.