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Table 1 Average values of weighted mean depth (WMD) and the percentage of the population at the surface during day and night for female (total, ovigerous, and non-ovigerous) and male P. concinna , Acrocalanus , Paracalanus and Parvocalanus , and Canthocalanus copepodites

From: The seasonal distribution, diel vertical distribution and feeding behavior of Paraeuchaeta concinna in the shallow subtropical coastal waters of eastern Hong Kong

  WMD (m) % of population at the surface (0–5 m)
  Day Night p Day Night p
Female P. concinna 16.8 (±1.3) 12.8 (±3.1) <0.05 6.1 (±2.8) 38.3 (±12.1) <0.01
Ovigerous 17.2 (±1.9) 12.9 (±3.2) <0.05 4.1 (±5.6) 37.3 (±14.5) <0.01
Non-ovigerous 16.9 (±1.4) 13.3 (±3.1) <0.05 6.1 (±7.4) 33.4 (±9.6) <0.01
Male P. concinna 16.0 (±1.4) 12.9 (±3.1) <0.05 15.5 (±16.4) 40.6 (±20.7) <0.05
Acrocalanus 9.8 (±3.4) 10.5 (±2.9)   55.8 (±23.6) 54.0 (±16.7)  
Paracalanus and Parvocalanus 9.9 (±1.1) 10.3 (±7.2)   56.6 (±6.1) 54.2 (±11.1)  
Canthocalanus copepodites 15.5 (±0.8) 12.2 (±13.4)   21.8 (±7.6) 41.2 (±11.5) <0.05
  1. Student’s t-test was used to test for the presence of diel vertical migration.