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'During the IIOE, zooplankton collections were made between 25 degrees N and 45 degrees S latitude and 30 to 120 degrees E longitude. Sampling covered the entire Indian Ocean, with better coverage north of 10 degrees S latitude. Though 1927 samples were collected during IIOE, zooplankton data for 1548 standard hauls were considered to be comparable and these alone were utilized for all publications. A standard haul is defined as an Indian Ocean Standard net collection of zooplankton in the water column under 1 square meter.' (Nair, 2005)
\nWhen the depth of the water exceeded 200 meters, the net was hauled from a depth of 200 meters to the surface. In shallower waters, the net was operated from the bottom to the surface. The material studied was collected during both day and night. (Pillai, 1973)
\n'The samples were then to be preserved in 10% formalin neutralized with hexamethylenetetramine...The samples would then be sent to the Sorting Centre for further processing.' (Hansen, 1966)
\nReferences:
Hansen, Vagn Kr., 1966. The Indian Ocean Biological Centre: The centre for sorting plankton samples of the International Indian Ocean Expedition. Deep-Sea Res., 13, pp.229-234.
Nair, V.R., 2005. Database for zooplankton collected during International Indian Ocean Expedition (IIOE) 1960-65. Cooperating project Report. Census of Marine Zooplankton (CMarZ), Connecticut, USA.
Pillai, N. K. 1973. Mysidacea of the Indian Ocean. Handbook to the International Zooplankton Collections, curated and processed at the Indian Ocean Biological Centre 4: 1-125.
Mysidacea were collected by several ships that took part in the International Indian Ocean Expedition (IIOE) from 1962 to 1965. Though collections were taken from all over the Indian Ocean, the bulk of the material comes from the seas around the Indian Peninsula.
\nAlthough technically retired, Vijaya Nair remains the contact for anyone seeking information about these data.
\nContact information:
\nVijayalakshmi R. Nair
\nHB/50, Vijaya
\nSouth Bridge Avenue, Panampilly Nagar
\nKochi 682036, Kerala, India
\n(telephone/fax) 00-91-484-2316999
vijayalakshmi40@hotmail.com
Zooplankton samples collected during the IIOE are archived at the regional Centre of National Institute of Oceanography, Kochi.
\nBCO-DMO made the following modifications:
\n- Replaced blanks with zeroes in the species columns.
\n- Replaced blanks with 'nd' ('no data')\u00a0 in the depth, time_local, and day_night_flag columns.
\n- Changed parameter names to BCO-DMO standard names.
\n- Corrected date of reference 293 (station 404) from 10/10/2004 to 10/10/1964.
\n- Corrected date of reference 896 (station 27) from 4/1/1963 to 4/1/1964.
\n- Corrected spelling of Gymmerythrops macrops to Gymnerythrops macrops.
\n- Corrected spelling of Acanthomysis micropes to Acanthomysis macrops.
\n- Added 'species_WoRMS' column by checking original species names against the WoRMS database and recording the WoRMS-accepted taxonomic name.