NMFS Office of Science & Technology   |   Marine Ecosystems Division   <-- back to previous page -- Sampling Metadata   <-  Snellius II Expedition (Data Summary)   <-  COPEPOD: The Global Plankton Database     SAMPLING METADATA Sampling and Processing Summary Fifty years after the Snellius Expedition (1929-1930), the Snellius II Expedition (1984-1985) investigates the biological oceanography of the eastern Banda Sea and the northern Arafura Sea. Cruise aboard the RV SAMUDERA and RV TYRO were run during both the SE monsoon (July/August 1984) and during the NW monsoon (February/March 1985). Aboard the RV TYRO, zooplankton were sampled from 0-150 meters with 200 micrometer mesh nets (fitted with a 5 millimeter screen to exclude large plankters). Two different sampling protocols were used: At even-numbered stations, a Gulf V net was used for double-oblique tows. The amount of water filtered was calculated from flow meter readings and the Gulf V cone opening (50 cm). At odd-numbered stations, vertical net hauls ("V.N.") were made. The amount of water filtered was calculated from the length of wire released times the surface area of the net opening (diameter = 75cm, area= 0.44 sq meters). Aboard the RV SAMUDERA, zooplankton were sampled via vertical tows with nets of different mesh size (75, 150, 300, 500 micrometers). 75 micrometer: A Kitihara Net (31 centimeter mouth opening, 75 micrometer mesh) was used to sample the SETTLED VOLUME of zooplankton and larger phytoplankton specimens. 150 and 300 micrometer: A NORPAC Net (45 centimeter mouth opening) was used to sample displacement volume of zooplankton larvae (150um) and/or mesozooplankton (300um). 500 micrometer: A NORPAC Net with a 55 centimeter mouth opening was used to sample displacement volume of larger zooplankton. Sampling Gear Net Mesh Tow Method ( depth range ) # of Tow % of all Tows NORPAC (North Pacific Standard Net) 150 um vertical under ~25 m 9 3.4 % NORPAC (North Pacific Standard Net) 150 um vertical down-to ~50 m 18 6.8 % NORPAC (North Pacific Standard Net) 150 um vertical down-to ~100 m 11 4.2 % NORPAC (North Pacific Standard Net) 150 um vertical down-to ~250 m 5 1.9 % NORPAC (North Pacific Standard Net) 300 um vertical under ~25 m 9 3.4 % NORPAC (North Pacific Standard Net) 300 um vertical down-to ~50 m 20 7.6 % NORPAC (North Pacific Standard Net) 300 um vertical down-to ~100 m 8 3.0 % NORPAC (North Pacific Standard Net) 300 um vertical down-to ~250 m 7 2.7 % NORPAC (North Pacific Standard Net) 500 um vertical under ~25 m 8 3.0 % NORPAC (North Pacific Standard Net) 500 um vertical down-to ~50 m 19 7.2 % NORPAC (North Pacific Standard Net) 500 um vertical down-to ~100 m 10 3.8 % NORPAC (North Pacific Standard Net) 500 um vertical down-to ~250 m 5 1.9 % Plankton Net (type not specified) 200 um vertical down-to ~100 m 39 14.8 % Kitahara(n) Net 75 um vertical under ~25 m 9 3.4 % Kitahara(n) Net 75 um vertical down-to ~50 m 22 8.3 % Kitahara(n) Net 75 um vertical down-to ~100 m 13 4.9 % Gulf V Sampler (modified Gulf III; high speed) 200 um other down-to ~100 m 47 17.8 % Gulf V Sampler (modified Gulf III; high speed) 200 um other down-to ~250 m 5 1.9 %     TOTAL TOWS 264   Sub-Collection:   Snellius II Expedition COPEPOD https://www.st.nmfs.noaa.gov/copepod Web v14.1   [ 2017-Sep ]