MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Age and growth of the giant snail Adelomelon beckii: inference from stable isotope analysis
Autor/es:
ARRIGHETTI, F.
Revista:
The Malacologist
Editorial:
The Malacologist
Referencias:
Año: 2009 vol. 53 p. 14 - 14
ISSN:
1759-1406
Resumen:
The aim of this study is to analyze individual growth and age in this specie using stable oxygen isotopes in order to provide parameters of the population dynamics. Annual growth bands in A. beckii shells were identified by internal growth band pattern and validation of annual formation by stable isotopes analysis. The stable isotope profile showed a distinct pattern that reflects a cyclical environmental temperature. The position of the growth marks visible on the internal shell structure coincide with the position of the  d18O peaks.Potential lifespan of Adelomelon beckii in Mar del Plata area is 28 years as the largest individual recorded had a shell length of 390 mm. This specie appears to be rather long lived compared with other gastropods. The life span of several South Western Atlantic volutids seems to be twice compared with other large gastropods, probably reflecting a phylogenetic difference between families.