Age, growth, and ontogenetic variation in the sagitta otolith of Opsanus beta (Goode & Bean, 1880), a non-native species in a wetland of international importance

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 a...

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Veröffentlicht in:Latin american journal of aquatic research 2022-03, Vol.50 (1), p.124-134
Hauptverfasser: Carvalho, Barbara M, Freitas, Matheus Oliveira, Lapuch, Isabel, Volpedo, Alejandra V, Vitule, Jean R.S
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creator Carvalho, Barbara M
Freitas, Matheus Oliveira
Lapuch, Isabel
Volpedo, Alejandra V
Vitule, Jean R.S
description 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 Paranaguá 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.
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subjects Adaptation
Age
Age composition
Age groups
Biodiversity
Brackishwater environment
Estuaries
Fish
FISHERIES
Indigenous species
Introduced species
Invasive species
Life history
MARINE & FRESHWATER BIOLOGY
Marine environment
Native organisms
Native species
Nonnative species
OCEANOGRAPHY
Ontogeny
Opsanus beta
Otoliths
Population
Salinity
Shape
Variation
Wildlife conservation
title Age, growth, and ontogenetic variation in the sagitta otolith of Opsanus beta (Goode & Bean, 1880), a non-native species in a wetland of international importance
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