Research Article

Covariations between Shell-Growth Parameters and the Control of the Ranges of Variation of Functionally Relevant Shell-Shape Parameters in Bivalves: A Theoretical Approach

Table 3

Covariances between growth-related parameters , , and , in (i) inter-specific context (negative covariance within genus Tellina, Donax, Gari, Abra, and Macoma) and (ii) intra-specific context (positive covariance within Donax trunculus, Unio pictorum, and Anodonta cygnea).

Tellina Donax Gari Abra Macoma Donax tr. Unio pic. Anodont.

Contextinter-sp.inter-sp.inter-sp.inter-sp.inter-sp.intra-sp.intra-sp.intra-sp.
Covariance
Correl. coeff.−0.91−0.74−0.87−0.94−0.79+0.58+0.71+0.81
Sample size = 49 = 36 = 11 = 7 = 75112157
Significance