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. 2014 Mar 11;9(3):e91235. doi: 10.1371/journal.pone.0091235

Table 1. Clam garden effect on density and biomass.

Fixed Effect Random Effect
Response variable Beach Type Site (Beach Type)
Density z p Variance StdDev
L. staminea (All) 2.24 0.03* 0.60 0.78
S. giganteus 2.25 .03* 2.38 1.54
V. philippinarum –0.69 0.49 4.66 2.16
Macoma spp. 0.05 0.96 1.51 1.23
TOTAL clam –1.01 0.32 0.53 0.73
L. staminea (1–13 mm) 2.49 0.01* 0.61 0.78
L. staminea (14–26 mm) 2.76 <0.01* 0.77 0.87
L. staminea (27–39 mm) 2.11 0.04* 0.73 0.86
L. staminea (40–52 mm) –1.06 0.29 1.12 1.06
L. staminea (53–65 mm) 0.18 0.86 3.70 1.92
Biomass t p Residual
L. staminea –1.16 0.26 0.10
S. giganteus –1.77 0.09 0.24
V. philippinarum –1.23 0.24 0.03
 Macoma spp. 1.41 0.17 0.04
TOTAL clam –0.20 0.85 0.33

The effect of clam gardens (Beach Type) on density and biomass (per survey transect, 0.027 m3) of L. staminea (littleneck clam), S. giganteus (butter clam), V. philippinarum (Japanese littleneck clam), Macoma spp (macoma clams) and total clams. * designates significant p-values (p≤0.05).