Biometric relationships of Mactra violacea (Gmelin) from Kerala,
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Abstract
The length-weight (L-W) and other biometric relationships of the surf clam
Mactra violacea
, collected from the north coast
of Kerala are presented in this study. In
M. violacea
, the L-W relationship between males and females was not found to be
significantly different and therefore a combined equation was derived. The growth in length is accompanied by weight
increase (isometric growth, b = 1). However, in all other biometric relationships such as length-width (L - B), length-height
(L - H), total weight-meat weight (TW - MW), total weight-shell weight (TW - SW), and shell weight–meat weight
(SW - MW)), allometric growth was observed. In the case of L - B, L - H and TW - MW, a positive biometric relationship
exists (b > 1) while in TW - SW and SW - MW, a negative biometric relationship (b< 1) was observed.