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Table 1 Number of increments at different growth stages of cultured cephalopods. (28‒30 °C)

From: Relationships of growth increments of internal shells and age through entire life cycles in three cultured neritic cephalopods (Mollusca: Cephalopoda) with re-evaluation as application for age determination

Increments Age (days) Sepioteuthis lessoniana Sepia pharaonis Sepiella inermis
Mean SE Mean SE Mean SE
Hatchling number of increments 0 5.1 0.9 7.6 0.5 5.8 0.4
Difference of number of increments from age Entire 25.1 5.5 9.6 1.2 5.1 3.2
< 60 6.1 0.5 5.6 0.4 3.8 0.8
> 60 39.6 5.8 11.7 1.6 11.4 4.3
Difference of number of increments from age (hatchling excluded) Entire 20.8 5.4 2.4 1.2 11.7 3.2
< 60 1.1 0.6 1.7 0.7 2.4 0.8
> 60 33.3 5.7 4.1 1.6 17.3 4.3
Daily increment formation rate (increment/day) Entire 0.9 0.1 1.1 0.1 1.0 0.1
< 60 1.0 0.1 1.0 0.1 0.9 0.1
> 60 0.8 0.2 1.1 0.1 1.0 0.1