INVESTIGADORES
VOLPEDO Alejandra Vanina
artículos
Título:
Age, growth and ontogenetic variation in the sagitta otolith of Opsanus beta (Goode & Bean, 1880) an invader in a wetland of international importance.
Autor/es:
BARBARA MAICHAK DE CARVALHO; MATHEUS OLIVEIRA FREITAS; SABEL LAPUC; ALEJANDRA V. VOLPEDO; JEAN R.S. VITULE
Revista:
Latin American Journal of Aquatic Research
Editorial:
Universidad Católica de Vaparaiso
Referencias:
Año: 2022 vol. 50
ISSN:
0717-7178
Resumen:
Invasive species are among the most important problems for biodiversity conservation worldwide, particularly in megadiverse countries such as Brazil. However, there is no biological information to develop policies for managing invasive species populations in many cases. The life history parameters and otolith variations are essential to understanding the adaptations of the species introduced in marine environments. This study aimed to identify the age structure and ontogenetic variation in the sagitta otolith of Opsanus beta. Fish samples were obtained monthly in the Paranagu√° Estuarine Complex (PEC), south of Brazil. The shape indices verified ontogenetic variations in the otoliths (PERMANOVA; F = 110; P < 0.0001), but no sexual variations were observed in the shape of the otoliths (PERMANOVA; F = 3.65; P > 0.05). Specimen aged between 1 to 9 years were observed in the PEC, with the highest occurrence of individuals between 3 and 6 years (78%). No sexual differences were observed between the ages by the Kimura test. Our results confirm that the O. beta population is well established with age groups similar to that observed in the region where the species is native.