Shell Shape Analysis and Spatial Allometry Patterns of Manila Clam (Ruditapes philippinarum) in a Mesotidal Coastal Lagoon

Table 3

Comparison of morphometric results with other sites including Europe.

Site/Area	Mean morphometrics results	Length (S. D.) indications of the studied population (mm)	Sources
Japan	𝐻/𝐿 from 0.70 to 0.75	Range 10.8 (0.60) to 11.5 (0.63)	Deduced from Watanabe and Katayama [23]—Figure 3
	𝑊/𝐿 from 0.40 to 0.45
China	𝐻/𝐿 = 0.69	Mean Length 20.35 (1.35)	Deduced from Fan et al. [33]—Table 1
	𝑊/𝐿 = 0.44
Spain (bottom culture)	𝐻/𝐿 from 0.58 to 0.73	Range 13.7 (0.26) to 26.6 (0.43)	Deduced from Cigarría and Fernández [18]—Table 1
	𝑊/𝐿 from 0.41 to 0.48
Tunisia	𝐻/𝐿 = 0.69	Mean Length 35.0 (3.82)	Deduced from Ben Ouada et al. [30]—Table 1
	𝑊/𝐿 = 0.44
Italy	𝐻/𝐿 = 0.71	Mean Length 39.2 (5.7)	Deduced from Geri et al. [34]—Table 1
	𝑊/𝐿 = 0.50
France (Barfleur)	𝐻/𝐿 from 0.68 to 0.71	Range 19 to 33	Deduced from Gérard [7]—Figures  32 and 36
	𝑊/𝐿 from 0.40 to 0.48

Note: after having checked for valves symmetry on a subsample, the W/L ratio (obtained by TNPC system) for Arcachon was multiplied by two in order to allow for realistic comparison with published ratios.