Individual growth and somatic production in Adelomelon brasiliana (Gastropoda; Volutidae) off Argentina

M. CLEDÓN; T. BREY; P. E. PENCHASZADEH; W. ARNTZ

MARINE BIOLOGY

SPRINGER

Año: 2005 vol. 147 p. 447 - 453

0025-3162

Abstract  Growth, age and somatic production of the benthic predator Adelomelon brasiliana were studied at the southern limit of its distribution on the South American Atlantic shelf. Stable oxygen isotope ratios confirmed annual formation of internal shell growth marks. Modal shell length of the population was 140 mm, while modal shell-free wet mass was 255 g. A logistics growth function (SL¥=186.28 mm, K=0.185, t0=4.601) fitted 131 pairs of size-at-age data (25 shells) best. A. brasiliana is a very long-lived species, reaching up to 20 years of age. The maximum individual somatic production of 46 g shellfree wet mass year1 is attained at 145 mm shell length, which corresponds to about 12 years of age.Growth, age and somatic production of the benthic predator Adelomelon brasiliana were studied at the southern limit of its distribution on the South American Atlantic shelf. Stable oxygen isotope ratios confirmed annual formation of internal shell growth marks. Modal shell length of the population was 140 mm, while modal shell-free wet mass was 255 g. A logistics growth function (SL¥=186.28 mm, K=0.185, t0=4.601) fitted 131 pairs of size-at-age data (25 shells) best. A. brasiliana is a very long-lived species, reaching up to 20 years of age. The maximum individual somatic production of 46 g shellfree wet mass year1 is attained at 145 mm shell length, which corresponds to about 12 years of age.