. Fig. 17. Showing the average vertical distribution of Coscinodiscus bouvet at shallow- and deep-water stations taken in daylight and darkness and indicating an apparent diurnal vertical migration. upper 250 m. in daylight and darkness. This is shown in Fig. 17. The figures are inter- esting. In the shallow-water stations (seven in daylight and four in darkness) we have the following proportions at different depths: - Daylight Darkness m. 50-0 100-50 250-100 % 24 31 45 % 4-6 17-5 77-9

---

Size: 1317px × 3795px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti