Marine_Scotland_FishDAC_1712
eng
dataset
Scottish Government (Marine Scotland)
+44 (0)300 244 4000
marinescotland@gov.scot
pointOfContact
2016-10-19
MEDIN Discovery Metadata
Version 2.3.7
urn:ogc:def:crs:EPSG::4326
OGP
1415S Mackerel Acoustic Survey_-Scotia Cruise 1415S
Broadband acoustics, edgetech, mackerel acoustic survey
2016-03-29
publication
Marine_Scotland_FishDAC_1712
Daily folders (11) of Simrad format (.raw) acoustic data. 6 folders of Edgetech broadband acoustic data. Echoview mackerel detection template. PDF biological data for 6 pelagic hauls and rod and line deployments. Biological data in FSS database. CTD data for 6 vertical dips. Continual Thermosalinograph data. Continual AGDS data.
Overall Objectives:
To estimate mackerel density and abundance in the area of the Shetland Isles.
To investigate the use of a broadband system as a means to determine mackerel size.
To study distribution of cetaceans and their relationship to mackerel shoals.
Specific Objectives:
Calibration of Edgetech Broadband system.
Calibrate Sv and TS gains on the Simrad EK60.
Obtain acoustic data from mackerel using the Edgetech broadband system.
Obtain biological samples of mackerel from schools by trawling.
Trial deployment options for the Edgetech broadband system.
Obtain acoustic data from mackerel using the Simrad WBAT autonomous broadband system.
Compare the echo returns from a low cost portable sounder system with those from the calibrated Simrad EK60 echo-sounder system.
Deploy a lightweight AU Go-Pro camera system into the mackerel schools to observe behaviour.
Deploy MSS Go-Pro system on PT160 net
Deploy MSS Go-Pro lander system onto the sea bed to identify fish traces on un-trawlable ground.
Visually observe marine mammal distribution and activity during daylight hours.
Obtain towed hydrophone acoustic recordings of mammal vocalisation during survey transects.
Compare netsonde traces of mackerel in the net with those seen using the cable less Scanmar trawl eye system.
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
Aberdeen University
+44 1224 272 000
King's College
Aberdeen
AB24 3FX
United Kingdom
s.piertney@abdn.ac.uk
originator
Not Planned
Marine Environmental Data and Information Network
Acoustics
Biota composition
Water column temperature and salinity
SeaDataNet Agreed Parameter Groups
2010-10-23
revision
Acoustic backscatter in the water column
Cetacean abundance
Cetacean behaviour
Fish abundance in water bodies
Fish biomass in water bodies
Fish morphology, age and physiology
Water column photography
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
-5
3
58.5
61.5
ICES Rectangles
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46E5
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47E6
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ICES Rectangles
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creation
51F2
SeaDataNet vertical extent keywords
2010-01-01
revision
The entire body of water between the bed and the atmosphere.
2015-10-05
2015-10-16
https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/
Reference info #0
Electronic - 17GB Simrad format, 43GB Broadband Edgetech format - Daily folders (11) of Simrad format (.raw) acoustic data. 6 folders of Edgetech broadband acoustic data. Echoview mackerel detection template. PDF biological data for 6 pelagic hauls and rod and line deployments. Biological data in FSS database. CTD data for 6 vertical dips. Continual Thermosalinograph data. Continual AGDS data..
dataset
Fishing and Sampling Gear:
Midwater trawl PT160 x 2
Edgetech broadband towed system
Seabird 911 CTD
Go-pro camera system(s) with additional sensors (depth, temp, attitude etc)
Towed hydrophone array
Lowrance echosounder system
Simrad WBAT autonomous broad band sounder system
Rod and line systems.
Scanmar trawl eye sensor
Acoustic data will be collected at four frequencies (18, 38, 120 and 200 kHz) on a 24 hour basis. While transecting, a towed hydrophone array will be deployed over the stern of the vessel and will be recovered prior to any fishing operations. The towed hydrophone will not restrict the vessels movement when at survey speed.
Fish schools seen on the echosounder will be identified using a pelagic trawl (PT160). Trawling operations will be carried out at any time in a pre agreed period, probably between 09:00 and 21:00 hours. The vessels netsonde systems will be required to monitor catch density and position of schools in the water column during trawling. The SH80 sonar will be used to collect acoustic data and direct trawling operations.
Biological sampling of all species caught will be carried out as per standard sampling protocol with 5 otoliths per cm length for each haul plus required length and weight data.
A vertical CTD dip will be carried out immediately following a pelagic trawl or once a day if trawling has not taken place, this will require the vessel to use its DP system to remain on station.
Deployment into mackerel schools of the fishing rod mounted Go-Pro camera/sensor system will be done either from the hanger deck in DP or with vessel drifting depending on the conditions. The opportunity will be taken during some tows to deploy the MSS net mounted Go-Pro system on the net.
Go pro systems may be deployed onto the seabed if schools are seen in un-trawlable areas.
The ships thermo-salinograph will be run continuously to obtain sea surface temperature and salinity throughout the survey area.