PROBIEN 20416
INSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS, BIOTECNOLOGIA Y ENERGIAS ALTERNATIVAS
Unidad Ejecutora - UE
artículos
Título:
Growth and life span of the small octopus Octopus tehuelchus in San Matías Gulf (Patagonia): three decades of study
Autor/es:
STORERO, L.; OCAMPO, M.; GONZÁLEZ, R.; NARVARTE, M.
Revista:
MARINE BIOLOGY
Editorial:
Springer
Referencias:
Lugar: New York; Año: 2010 vol. 157 p. 555 - 564
ISSN:
0025-3162
Resumen:
Phenotypic plasticity in response to environmental
variability is one of the main characteristics of
cephalopods. This study compares growth and life span
of Octopus tehuelchus in different coastal environments of
San Matý´as Gulf (Patagonia) at three different periods. The
progression of maturity jointly with modal progression
analysis and the detection of hatchlings in the natural
environment were used to differentiate cohorts and assign
ages. Growth was described using the oscillatory von
Bertalanffy growth model. Within San Antonio Bay,
O. tehuelchus seems to have the most favourable conditions
for an extended spawning season and the development of
two sub-annual cohorts. O. tehuelchus growth is strongly
seasonal with slow growth rates during winter. There were
differences in the growth pattern between sites and particularly
between sub-annual cohorts in San Antonio Bay.
The growth pattern in each site seems to be similar along
the last 26 years. The results of our study make evident the
variability and plasticity of O. tehuelchus in response to the
environment.
