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Taxonomic status of Acetes americanus in the Western Atlantic: are Acetes americanus americanus and Acetes americanus carolinae the same species?

Grant number: 14/01632-3
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2014
Effective date (End): December 31, 2015
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Fernando Luis Medina Mantelatto
Grantee:Sabrina Morilhas Simões
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated research grant:10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics), AP.BTA.TEM


The taxonomic status of the sergestid shrimp Acetes americanus is uncertain for several decades and no study has been conducted for this species to date. This shrimp has a wide geographical distribution in the western Atlantic and it is represented by two subspecies, Acetes americanus carolinae (distributed in North America) and Acetes americanus americanus (distributed in South America). However, both subspecies occur in regions of the Central America and northern South America. The molecular tools have shown to be essential to elucidate the taxonomic status of the species. Moreover, the combination of morphological and molecular studies is extremely important to analyze the population structure. Therefore, the purpose of this study is to compare genetically individuals of Acetes a. americanus (collected in South America) with samples of Acetes a. carolinae (collected in North America), as well as analyze individuals of both subspecies in regions where they have the same occurrence. Additionally, the possible existence of more than one population of A. americanus will be investigated in the Brazilian coast by morphometric and molecular approaches. Sequences of the mitochondrial gene Cytochrome Oxidase I (COI) will be analyzed in 6 individuals per collection site. For the morphometry analysis, 30 specimens of each sex per collection site will be analyzed by 14 morphometric measurements. Thus, a more detailed study using the morphology and genetics of A. americanus will be valuable to elucidate the taxonomic status and population structure of this species.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MIAZAKI, LIZANDRA FERNANDES; SIMOES, SABRINA MORILHAS; CASTILHO, ANTONIO LEAO; COSTA, ROGERIO CAETANO. Population dynamics of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda, Aethridae) on the southern coast of SAo Paulo state, Brazil. Journal of the Marine Biological Association of the United Kingdom, v. 99, n. 4, p. 867-878, JUN 2019. Web of Science Citations: 2.
MANTELATTO, FERNANDO L.; CARVALHO, FABRICIO L.; SIMOES, SABRINA M.; NEGRI, MARIANA; SOUZA-CARVALHO, EDVANDA A.; TEROSSI, MARIANA. New primers for amplification of cytochrome c oxidase subunit I barcode region designed for species of Decapoda (Crustacea). Nauplius, v. 24, p. -, 2016. Web of Science Citations: 9.
FREITAS DOS SANTOS, ANA PAULA; SIMOES, SABRINA MORILHAS; BOCHINI, GABRIEL LUCAS; COSTA, CINTHIA HELENA; DA COSTA, ROGERIO CAETANO. Population parameters and the relationships between environmental factors and abundance of the Acetes americanus shrimp (Dendrobranchiata: Sergestidae) near a coastal upwelling region of Brazil. Brazilian Journal of Oceanography, v. 63, n. 3, p. 229-238, JUL-SEP 2015. Web of Science Citations: 0.

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