SAMPLING METHODS SUMMARY
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Zooplankton were collected by NORPAC net with a GG54 mesh (~330 micrometers) and a flowmeter.   The tow was started at one meter from the bottom (via echosounder) and then hauled to the surface at a speed of 1 meter per second. Phytoplankton were collected with another NORPAC net with NXX-13 mesh (~100 micrometers).   The tow was started at ten meters depth and hauled to the surface at a speed of 50 cm/sec by hand.   All plankton samples (both types) were immediately preserved in 10% formalin and sorted upon return to Japan.

SAMPLING GEAR	NET MESH	TOW METHODS ( depth range )	# of TOWS	% of all TOWS
NORPAC (North Pacific Standard Net)	100 um	vertical down-to ~50 m	4	7.7 %
NORPAC (North Pacific Standard Net)	100 um	vertical down-to ~100 m	3	5.8 %
NORPAC (North Pacific Standard Net)	100 um	vertical down-to ~250 m	2	3.8 %
NORPAC (North Pacific Standard Net)	330 um	vertical down-to ~50 m	15	28.8 %
NORPAC (North Pacific Standard Net)	330 um	vertical down-to ~100 m	15	28.8 %
NORPAC (North Pacific Standard Net)	330 um	vertical down-to ~250 m	12	23.1 %
NORPAC (North Pacific Standard Net)	330 um	vertical down-to ~1000 m	1	1.9 %
		TOTAL TOWS	52

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Sub-Collection:   Koyo Maru - Brazil

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