SAMPLING METHODS SUMMARY
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Saldanha Cruise 07:   This cruise used a "no. 20 conical plankton net". Based on other Saldanha cruises, and the range of the biomass values, this is assumed to be a "no 20 fish mesh" (0.20 millimeters = 200 micrometer). A "no. 20 silk" would have a mesh <80 micrometers, and is uncharacteristic of the other fisheries-based Saldanha cruises. Horizontal tows (filtering ~137 cubic meters of water) and vertical tows (made to approximately 150 fathoms = ~274 meters). The volumetric biomass is assumed to be "settled volume" (rather than displacement volume). Saldanha Cruise 08:   This cruise used the same methods as Cruise 07. Saldanha Cruise 31:   This cruise used a plankton net 0.8 meters diameter and 2 meters in length, with a 125 micrometer mesh. A horizontal tow was made (filtering ~100 cubic meters of water), then vertical tows were made above and below the thermocline ( 0 - ~35 meters, ~35 meters - ~75 meters). Biomass was provided as "volume por decantacao" (volume of decantation). This was translated as "settled volume". Saldanha Cruise 36:   This cruise used a plankton net 1 meter-square mouth area and 2 meters in length, with a 125 micrometer mesh. A horizontal tow was made (filtering ~100 cubic meters of water), then vertical tows were made above and below the thermocline ( 0 - ~35 meters, ~35 meters - ~75 meters). Biomass was labelled as "cm3-sedimen". This was translated as "settled volume".

SAMPLING GEAR	NET MESH	TOW METHODS ( depth range )	# of TOWS	% of all TOWS
plankton net ( 0.8 m diameter x 2 m length )	125 um	horizontal "surface"	101	12.4 %
plankton net ( 0.8 m diameter x 2 m length )	125 um	vertical under ~25 m	12	1.5 %
plankton net ( 0.8 m diameter x 2 m length )	125 um	vertical down-to ~50 m	40	4.9 %
plankton net ( 0.8 m diameter x 2 m length )	125 um	vertical down-to ~100 m	47	5.8 %
plankton net ( 1 m2 mouth area x 2 m length )	125 um	horizontal "surface"	274	33.7 %
plankton net ( 1 m2 mouth area x 2 m length )	125 um	vertical under ~25 m	9	1.1 %
plankton net ( 1 m2 mouth area x 2 m length )	125 um	vertical down-to ~50 m	68	8.4 %
plankton net ( 1 m2 mouth area x 2 m length )	125 um	vertical down-to ~100 m	23	2.8 %
plankton net ( 1 m2 mouth area x 2 m length )	125 um	vertical down-to ~250 m	98	12.0 %
no. 20 conical plankton net	200 um	horizontal "surface"	46	5.7 %
no. 20 conical plankton net	200 um	horizontal "surface"	23	2.8 %
no. 20 conical plankton net	200 um	vertical down-to ~100 m	1	0.1 %
no. 20 conical plankton net	200 um	vertical down-to ~250 m	50	6.1 %
no. 20 conical plankton net	200 um	vertical down-to ~250 m	22	2.7 %
		TOTAL TOWS	814

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Sub-Collection:   ALMIRANTE SALDANHA Collection

NMFS-COPEPOD http://www.st.nmfs.noaa.gov/plankton Web v7.1   [ 2008-Oct ]