Otolith chemistry as a tool to infer about the population structure of the bigtooth corvina (Isopisthus parvipinnis) in the Southeast Brazilian coast
-
1
Graduate Program in Oceanography, Oceanographic Institute, University of São Paulo, Brazil
-
2
Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Portugal
-
3
Department of Biological Oceanography, Oceanographic Institute, University of São Paulo, Brazil
-
4
Faculdade de Ciências da Saúde, Universidade Fernando Pessoa, Portugal
The bigtooth corvina (in Portuguese: tortinha or pescadinha), Isopisthus pavipinnis (Cuvier, 1830), is a marine estuarine-dependent fish who is also very representative as bycatch of the shrimp fisheries along the Brazilian SE and SW coasts. Since Brazilian waters provide different chemical signatures in otoliths, calcified structures, the aim of this work was to investigate the population structure of I. parvipinnis and its temporal stability between 1975 and 2018 in Southwestern Atlantic Ocean (São Paulo, Paraná, and Santa Catarina - Brazil) through otolith elemental composition. Individuals between 80 and 140 mm total length were obtained from historical samples (1975, research vessel) and commercial catches (2018, artisanal fleets) in the Brazilian Southeast and South coast, between São Paulo (North, Central, and South) and Paraná (PR). Following decontamination, otoliths were weigh and dissolved in ultrapure nitric acid. Informative element: Ca ratios were obtained using a ICP-MS. Variations between locations and years were tested using uni and multivariate analysis. Obtained data was analyzed in light of the current knowledge about the fish species ecology. New findings about the population structure is discussed taking into consideration the rational management of the fishery.
Acknowledgements
This work was supported by a PhD scholarship funded by CNPq (163116/2015-6) and PDSE – CAPES (88881.189862/2018-01), and partially supported by the Strategic Funding UID/Multi/04423/2019 through national funds provided by Foundation for Science and Technology (FCT) and European Regional Development Fund (ERDF), in the framework of the programme PT2020. Authors thank Marcelo Soeth (CEM-UFPR) and Rafael Shroeder (UFSC) for sampling support.
Keywords:
Sciaenidae,
sagittae,
Elemental signatures,
Chemical composition,
Population units
Conference:
XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019.
Presentation Type:
Poster
Topic:
OTOLITHS AS A TOOL TO STUDY FISH LIFE CYCLES
Citation:
Hoff
NT,
Dias
JF,
Zani-Teixeira
M and
Correia
AT
(2019). Otolith chemistry as a tool to infer about the population structure of the bigtooth corvina (Isopisthus parvipinnis) in the Southeast Brazilian coast.
Front. Mar. Sci.
Conference Abstract:
XVI European Congress of Ichthyology.
doi: 10.3389/conf.fmars.2019.07.00095
Copyright:
The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers.
They are made available through the Frontiers publishing platform as a service to conference organizers and presenters.
The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated.
Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed.
For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions.
Received:
18 Jun 2019;
Published Online:
14 Aug 2019.
*
Correspondence:
Prof. Alberto T Correia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Matosinhos, Portugal, atcorreia.ciimar@gmail.com