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Table 1 Effects of the tidal cycle (12 h, 13 samples including 0 h) and season (summer, autumn, winter and spring) on the environmental variability of the water column in the estuary of the river Quempillén (Ancud, Chile)

From: The influence of season and the tidal cycle on division of labour by the radula during feeding in the estuarine brooding gastropod Crepipatella dilatata (Calyptraeidae)

Source df MS F p
(A) Salinity
 Tidal cycle 12 163.4 46.61 0.0001
 Season 3 1223.3 14.86 0.0001
 Tidal cycle × season 36 56.6 16.15 0.0001
 Error 288 3.5   
(B) TPM
 Tidal cycle 12 3.66 0.99 0.4584
 Season 3 277.01 1.25 0.3261
 Tidal cycle ×  season 36 5.24 1.41 0.0741
 Error 192 3.69   
(C) OPM
 Tidal cycle 12 0.52 0.96 0.4865
 Season 3 33.9 2.41 0.1039
 Tidal cycle × season 36 0.53 0.96 0.5321
 Error 192 0.54   
  1. (A) Salinity, (B) total particulate matter (TPM) and (C) organic particulate matter (OPM). Data were analyzed by two-way repeated measures ANOVA, p values in italic indicate statistical significance
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Helgoland Marine Research

ISSN: 1438-3888

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