The Smithsonian Institution made plankton collections with an International Cooperative Investigations of the Tropical Atlantic (ICITA) net and an Indian Ocean Standard Net (IOSN).|
A comparison of the bridled ICITA net with the unbridled net showed that the mean ratios of the catches examined were not significantly different.
The mean ratios of the displacement volume of organisms collected were significantly different between day-time tows and night-time tows.
A comparison of organisms caught (versus displacement volume) with the bridled ICITA net with the unbridled Indian Ocean Standard Net showed that the ICITA net caught a significantly greater number of organisms than the IOSN. This difference was more pronounced during the night than during the day.