Citation:

PANGAEA.756333

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Related to:

Kutti, Tina; Fosså, Jan Helge (2009): Cruise report, R/V H. Mosby - cruise No. 2009615, M/S Øyfisk - cruise No. 2009813, 10th - 20th June 2009, Coral survey off Northern Norway. Benthic habitats and Shellfish Research Group, Institute of Marine Research, Bergen, Norway, 15 pp, hdl:10013/epic.36575.d001

Further details:

CoralFISH protocols for standardised fish census sampling strategies and methodologies

Project(s):

Ecosystem based management of corals, fish and fisheries in the deep waters of Europe and beyond (CoralFISH)

Funding:

Seventh Framework Programme (FP7), grant/award no. 213144 : Ecosystem based management of corals, fish and fisheries in the deep waters of Europe and beyond

Coverage:

Median Latitude: 67.058232 * Median Longitude: 10.634467 * South-bound Latitude: 66.978000 * West-bound Longitude: 10.011000 * North-bound Latitude: 67.202000 * East-bound Longitude: 11.153000

Date/Time Start: 2009-06-15T08:23:47 * Date/Time End: 2009-06-15T13:45:40

Minimum DEPTH, water: 5.0 m * Maximum DEPTH, water: 283.5 m

Event(s):

IMR-2009615_2009-06-15T0823 (fromtraenatorøstreef) * Latitude Start: 66.952000 * Longitude Start: 10.894000 * Latitude End: 67.480000 * Longitude End: 9.451000 * Date/Time Start: 2009-06-15T08:23:00 * Date/Time End: 2009-06-17T06:11:35 * Location: Røst Bank * Campaign: (IMR Coral survey off northern Norway) * Basis: * Method/Device: (ER60)

Comment:

The objective of the IMR-2009615 cruise was to study the distribution of fish and plankton in relation to the occurrence of Lophelia cold-water coral reefs and the general topography in the Traena Deep coral reef field. The acoustic data were collected using the Simrad ER60 scientific echosounder at a cruising speed of 10 knots. Abundance estimations of fish were generated for the 38 kHz data. Three other operating frequencies were used during the survey (18, 120 and 200 kHz) for trace recognition purposes. Echograms were scrutinized using Large Scale Survey System-software. The allocation of area backscattering strengths to species was made by comparison of the appearance of the echo recordings to trawl catches and video recordings. This dataset contains three hundred and sixty (360) vertical profiles of plankton and fish abundance expressed as Nautical Area Scattering Coefficient (NASC) determined from acoustics measurements at 38 kHz.

Abundances expressed as NASC (meter square per nautical mile square) can be converted to numbers of individuals using "target strength to length" relationships for the targeted species/group. For single species these relationships can be determined through in situ measurements of target strength during the survey and the size distribution of the insonified fish. The number of fish (N) in a particular area can be calculated using standard equations, e.g. Foote et al. (1987), Toresen et al. (1998), Roa-Ureta and Nikilitschek (2007).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DATE/TIME	Date/Time				Geocode
2	LATITUDE	Latitude				Geocode
3	LONGITUDE	Longitude				Geocode
4	Log info	Log		Fosså, Jan Helge		ER60 log start
5	Log info	Log		Fosså, Jan Helge		ER60 log end
6	DEPTH, water	Depth water	m			Geocode
7	Depth, top/min	Depth top	m	Fosså, Jan Helge
8	Depth, bottom/max	Depth bot	m	Fosså, Jan Helge
9	Micromesistius poutassou abundance as Nautical Area Scattering Coefficient	M. poutassou NASC	m²/nmi²	Fosså, Jan Helge	Interpreted values
10	Clupea harengus abundance as Nautical Area Scattering Coefficient	C. harengus NASC	m²/nmi²	Fosså, Jan Helge	Interpreted values
11	Mesopelagic fish abundance as Nautical Area Scattering Coefficient	Mesop fish NASC	m²/nmi²	Fosså, Jan Helge	Interpreted values
12	Plankton abundance as Nautical Area Scattering Coefficient	Plankt NASC	m²/nmi²	Fosså, Jan Helge	Interpreted values
13	Pollachius virens abundance as Nautical Area Scattering Coefficient	P. virens NASC	m²/nmi²	Fosså, Jan Helge	Interpreted values

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

85086 data points

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