NMFS Office of Science & Technology   |   Marine Ecosystems Division   <-- back to previous page -- Sampling Metadata   <-  JOHN D. GILCHRIST (Data Summary)   <-  COPEPOD: The Global Plankton Database     SAMPLING METADATA Sampling and Processing Summary Zooplankton "settled volume" was estimated for the sample after settling for 15 minutes in a graduated cylinder.   Where a sample exceed 5 ml settled volume it was split by means of a Fulsom plankton splitter.   The displacement volume was then determined on a fraction of the sample (Tranter, 1960).   All samples were preserved by the addition of 40% formaldehdye buffered with hexamine, which formed a 5% formalin solution with the sample.   Sampling Gear Net Mesh Tow Method ( depth range ) # of Tow % of all Tows N70V Vertical Closing Net 270 um vertical under ~25 m 1 1.0 % N70V Vertical Closing Net 270 um vertical down-to ~50 m 9 9.4 % N70V Vertical Closing Net 270 um vertical down-to ~100 m 57 59.4 % N70V Vertical Closing Net 270 um vertical down-to ~250 m 7 7.3 % N70V Vertical Closing Net 270 um vertical down-to ~500 m 8 8.3 % N113 (IOSN - 1m2 Indian Ocean Standard Net) 333 um vertical down-to ~100 m 6 6.2 % N113 (IOSN - 1m2 Indian Ocean Standard Net) 333 um vertical down-to ~250 m 1 1.0 % N100 (Gilchrist) 1000 um horizontal "surface" 4 4.2 % N100 (Gilchrist) 1000 um oblique down-to ~100 m 3 3.1 %     TOTAL TOWS 96   Sub-Collection:   JOHN D. GILCHRIST COPEPOD https://www.st.nmfs.noaa.gov/copepod Web v14.1   [ 2017-Sep ]