Citation:

PANGAEA.835331

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Abstract:

Mesopelagic fish were collected using a 1 m**2 Double-MOCNESS (Multiple Opening and Closing Net and Environmental Sensing System) and 4.5 m**2 IKMT (Isaacs-Kidd midwater trawl). The main portion of the IKMT was 20 mm knotted nylon, and the tail bag was 3 mm knotless nylon. Oblique IKMT tows were made to a maximum depth of 500 m at a tow speed of 3.5 knots. The original cruise plan intended for nighttime IKMT tows, but tow times varied due to operational constraints. The MOCNESS was equipped with 20 nets of 333 µm mesh size; 10 nets per side. The towing speed was 2 knots. Samples were collected to a maximum depth of 1250 m. The first oblique nets sampled from the surface to the max depth, and the other nets sampled depth stratified bins of the water column. MOCNESS hauls were performed during day and night to investigate diel vertical migrations. Mesoplelagic fish were processed on board. All fish were picked from all IKMT nets, most oblique MOCNESS nets, and the left side nets of the depth stratified MOCNESS samples. The Depth stratified nets from the right side of the MOCNESS frame were preserved in 5 % formalin for future quantitative analyses of the nekton. Fish were identified to the lowest possible taxa using Whitehead et al. (1984) and Fahay (2007). Standard length of each fish was measured to the nearest 0.1 mm using a digital caliper. Measured and identified fish were frozen in an -80 °C freezer, and shipped to the University of Hamburg at the end of the cruise.

Project(s):

Basin Scale Analysis, Synthesis and Integration (EURO-BASIN)

Funding:

Seventh Framework Programme (FP7), grant/award no. 264933 : Basin Scale Analysis, Synthesis and Integration

Coverage:

Median Latitude: 60.410578 * Median Longitude: -32.670457 * South-bound Latitude: 53.358833 * West-bound Longitude: -56.074000 * North-bound Latitude: 62.856000 * East-bound Longitude: -10.791000

Date/Time Start: 2013-03-25T13:24:00 * Date/Time End: 2013-04-13T22:39:00

Minimum DEPTH, water: 9.73 m * Maximum DEPTH, water: 1125.30 m

Event(s):

MSM26_126-9 * Latitude Start: 61.498000 * Longitude Start: -10.996000 * Latitude End: 61.445000 * Longitude End: -10.869000 * Date/Time Start: 2013-03-25T13:24:00 * Date/Time End: 2013-03-25T16:27:00 * Elevation Start: -1321.0 m * Elevation End: -1217.0 m * Location: North Atlantic Ocean * Campaign: * Basis: * Method/Device: Double opening/closing plankton net (D-MOC) * Comment: rope length max. 1855m /EL II

MSM26_126-13 * Latitude Start: 61.498000 * Longitude Start: -10.999000 * Latitude End: 61.440000 * Longitude End: -10.870000 * Date/Time Start: 2013-03-25T22:46:00 * Date/Time End: 2013-03-26T01:37:00 * Elevation Start: -1326.0 m * Elevation End: -1208.0 m * Location: North Atlantic Ocean * Campaign: * Basis: * Method/Device: Double opening/closing plankton net (D-MOC) * Comment: rope length max. 1996m /EL II

MSM26_126-15 * Latitude Start: 61.440000 * Longitude Start: -10.858000 * Latitude End: 61.407000 * Longitude End: -10.791000 * Date/Time Start: 2013-03-26T03:24:00 * Date/Time End: 2013-03-26T04:56:00 * Elevation Start: -1199.0 m * Elevation End: -1209.0 m * Location: North Atlantic Ocean * Campaign: * Basis: * Method/Device: Isaac-Kid-Midwater Trawl (IKMT) * Comment: rope length max. 1093m /EL II

Comment:

Geocode DEPTH, water = mean net depth (averaged all depth readings while a net was fishing)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Date/Time of event	Date/Time
5	Method/Device of event	Method/Device
6	Type	Type		Walsh, Harvey Joseph	of net
7	Sample ID	Sample ID		Walsh, Harvey Joseph	net
8	Depth, top/min	Depth top	m	Walsh, Harvey Joseph	minimum net depth
9	Depth, bottom/max	Depth bot	m	Walsh, Harvey Joseph	maximum net depth
10	DEPTH, water	Depth water	m		Geocode
11	Temperature, water	Temp	°C	Walsh, Harvey Joseph	mean
12	Salinity	Sal		Walsh, Harvey Joseph	mean
13	Time in minutes	Time	min	Walsh, Harvey Joseph	of tow time
14	Taxon/taxa	Taxa		Walsh, Harvey Joseph
15	Uniform resource locator/link to reference	URL ref		Walsh, Harvey Joseph	WoRMS Aphia ID
16	Length	l	nm	Walsh, Harvey Joseph

License:

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

Size:

13361 data points

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