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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
  1. Dawn and dusk (6–7 am/pm) values were eliminated for calculations