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Table 3 Biomass index (kg/km2), standard deviation (SD) and coefficient of variation (CV) of P. erythrinus by depth and in the overall bathymetric range for each survey

From: Distribution and biological features of the common pandora, Pagellus erythrinus (Linnaeus, 1758), in the southern Tyrrhenian Sea (Central Mediterranean)

Depth Biomass index (kg/km2) Survey
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
10–50 m Mean 6.2 24.3 65.9 56.7 25.0 29.2 69.4 96.2 210.4 268.0 31.3 20.0 27.3 13.3 20.3
SD 0.2 7.8 26.4 20.1 6.8 7.0 21.2 35.0 74.9 80.2 2.6 3.2 2.5 2.5 5.9
CV % 3.7 32.3 40.2 35.4 27.3 23.9 30.6 36.3 35.6 29.9 8.4 15.9 9.1 19.1 29.1
51–100 m Mean 63.8 24.7 48.3 73.2 31.7 36.6 55.0 64.6 50.3 9.9 5.9 38.0 13.4 24.5 10.5
SD 17.9 10.4 20.2 26.4 12.7 13.2 18.7 23.9 15.7 2.8 0.2 15.3 3.3 9.5 0.8
CV % 28.1 42.1 41.9 36.1 40.0 36.1 34.0 37.0 31.2 28.5 3.0 40.3 24.7 38.9 7.7
101–200 m Mean 5.7 15.3 0.0 0.0 5.7 2.7 6.6 4.2 0.0 0.0 0.0 1.2 4.0 1.3 1.4
SD 3.1 7.4 0.0 0.0 2.5 1.6 1.8 1.2 0.0 0.0 0.0 0.5 1.6 0.6 0.7
CV % 53.4 48.3 0.0 0.0 43.9 57.7 27.7 29.9 0.0 0.0 0.0 40.6 38.9 42.7 50.2
10–200 m Mean 21.8 20.4 31.1 35.6 18.2 18.8 36.9 45.9 67.7 68.8 9.4 16.4 12.5 10.7 8.8
SD 10.8 7.8 17.2 17.5 7.5 8.0 15.0 22.2 39.3 44.8 3.2 7.9 3.0 5.0 3.3
CV % 49.5 38.3 55.5 49.3 41.5 42.8 40.7 48.3 58.1 65.0 33.6 48.2 24.4 46.6 37.1