Table 3 Day (D) and night (N) mean abundance (ind 100 m−3) of five genera of juvenile holoplanktonic molluscs in five strata (m) of the water column during two sampling periods
From: Vertical segregation of holoplanktonic molluscs in the epipelagic layer, southern Gulf of Mexico
Stratum | Cavolinia | Diacavolinia | Oxygyrus | Diacria | Clio | |||||
|---|---|---|---|---|---|---|---|---|---|---|
D | N | D | N | D | N | D | N | D | N | |
May | ||||||||||
0–6 | 22.4 | 2.4 | 1.0 | 0.9 | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 |
6–12 | 22.5 | 2.1 | 1.4 | 1.2 | 0.3 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 |
12–18 | 24.3 | 2.7 | 6.8 | 1.1 | 0.0 | 1.2 | 0.5 | 0.1 | 0.0 | 0.0 |
45–55 | 8.4 | 0.5 | 0.4 | 0.0 | 0.0 | 0.4 | 0.9 | 0.4 | 0.0 | 0.0 |
95–105 | 2.3 | 1.1 | 0.6 | 0.0 | 0.0 | 0.1 | 1.4 | 2.7 | 1.4 | 0.5 |
November | ||||||||||
0–6 | 1.1 | 3.7 | 0.4 | 1.8 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
6–12 | 2.1 | 13.1 | 0.8 | 7.5 | – | – | 0.0 | 0.0 | 0.0 | 0.0 |
12–18 | 4.4 | 13.2 | 0.9 | 8.7 | – | – | 0.0 | 0.3 | 0.0 | 0.0 |
45–55 | 2.3 | 1.7 | 0.4 | 0.2 | – | – | 0.3 | 0.4 | 0.1 | 1.1 |
95–105 | 1.6 | 0.3 | 0.1 | 0.1 | – | – | 1.6 | 0.1 | 1.2 | 0.0 |