Body morphology as a tool to infer about the population structure of bigtooth corvina (Isopisthus parvipinnis) in the SE Brazilian coast
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1
Interdisciplinary Center for Marine and Environmental Research, Abel Salazar Institute of Biomedical Sciences, University of Porto, Portugal
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2
University of São Paulo, Brazil
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3
Fernando Pessoa University, Portugal
Information on population structure of aquatic organisms is a prerequisite for rational fisheries management and conservation strategies. Fish’s morphometric characteristics are measurable variables that result from an evolutionary process and adaption to the environment. It means that phenotypic variation between fish individuals is primarily due to heritability of genetic factors modulated by surrounding environment. This work aims to investigate if the different environments between São Paulo (North – NSP, Central – CSP, and South – SSP) and Paraná (PR) in Southeast Brazilian coast, could affect Isopisthus parvipinnis body morphometry, revealing important information about its population structure. Fish between 80 and 140 mm of total length were captured between September and November 2018 by local fishermen using an otter trawl. After collection, fish with selected arbitrarily landmarks were photographed and morphometric analysis were performed using tpsUtil and tpsDig softwares. Data was tested for allometric growth with ANCOVA, and analyzed through uni and multivariate analyses. Results showed a high overall re-classification rate (95%), with low overlapping between individuals from NSP and PR. The hereby data suggest that I. parvipinnis populations from the four regions are somewhat distinct. However, as a preliminary study, it is recommended the use of complementary information, namely other natural tags, to corroborate the observed results.
Acknowledgements
This work was 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.
Keywords:
Fisheries,
Sciaenidae,
Natural tag,
tpsDig,
Population-Units
Conference:
XX Iberian Symposium on Marine Biology Studies (SIEBM XX) , Braga, Portugal, 9 Sep - 12 Sep, 2019.
Presentation Type:
Poster Presentation
Topic:
Fisheries, Aquaculture and Biotechnology
Citation:
Hoff
NT,
Dias
JF,
Zani-Teixeira
MD and
Correia
AT
(2019). Body morphology as a tool to infer about the population structure of bigtooth corvina (Isopisthus parvipinnis) in the SE Brazilian coast.
Front. Mar. Sci.
Conference Abstract:
XX Iberian Symposium on Marine Biology Studies (SIEBM XX) .
doi: 10.3389/conf.fmars.2019.08.00172
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Received:
19 May 2019;
Published Online:
27 Sep 2019.
*
Correspondence:
Prof. Alberto T Correia, Interdisciplinary Center for Marine and Environmental Research, Abel Salazar Institute of Biomedical Sciences, University of Porto, Matosinhos, 4450-208, Portugal, atcorreia.ciimar@gmail.com