Date of station does not exist in the paper
Shelf station: Nets were lowered to about half the distance of the bottom

5% formalin buffered with hexamine and aliquoted
10% sea water-formalin solution buffered with hexamethylenetetramine
4 % formaldehyde solution that was buffered with sodium borate (pH > 8)
4% formalin seawater solution buffered to a pH of 8.1 with hexamethylenetetramine
95% ethyl alcohol buffered with tris (hydroxymethyl) aminomethane
5% formalin buffered with soduim bicarbonate
50% ethanol seawater solution and stored at 4 C
Fixed in a seawater solution containing 2% formalin by volume (formalin is 37% formaldehyde w/w) and buffered with hexamethylenetetramine at pH = 8.1 onboard
5% formalin buffered by hexamethylenetetamine
10% formalin buffered by hexamethylenetetamine
37% formaldehyde and buffered to pH 8.5 using pure solid hexamethylenetetramine
2% formaldehyde seawater solution, buffered with sodium tetraborate (borax)
4% buffered formalin seawater solution and stored at 0C
Plankton samples were fixed/preserved in alcohol (95% ethanol, 5% methanol)

Volume_filtered: lack of information on the volumes of water filtered in surface tows because of the separation technique used