Phylogeographic structuring of the amphidromous shrimp Atya scabra (Crustacea, Decapoda, Atyidae) unveiled by range-wide mitochondrial DNA sampling

Author(s)

Oliveira, Caio M. C. A. ^[1] ; Terossi, Mariana ^{[1, 2]} ; Mantelatto, Fernando L. ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Phylosophy Sci & Letters Ribeirao Preto FFCLR, Dept Biol, Lab Bioecol & Crustacean Systemat LBSC, Bandeirantes Ave 3900, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Fed Univ Rio Grande do Sul UFRGS, Lab Carcinol, Dept Zool, Inst Biosci, Bento Goncalves Ave 9500, BR-91501970 Porto Alegre, RS - Brazil

• Document type: Journal article
• Source: MARINE AND FRESHWATER RESEARCH; v. 70, n. 8, p. 1078-1093, JUL 2019.
• Web of Science Citations: 2

Abstract

Species with biological traits favourable to long-distance marine larval dispersal might show a phylogeographic structuring over broad regions, even when they are genetically connected within smaller scales. Here, we evaluated this hypothesis by using the widespread amphidromous shrimp Atya scabra, predicting a genetic discontinuity across biogeographical barriers throughout the Western Gulf of Mexico (WGM), Caribbean Sea (CS), south-western Atlantic (SWA) and eastern Atlantic (EA). Using cytochrome oxidase subunit 1 (COI) and 16S ribosomal unit (16S) gene fragments, we did a phylogeographic assessment and genetic characterisation with Bayesian clustering, AMOVA, haplotype networks and demographic analyses. As predicted, three discrete genetic groups, corresponding to the regions WGM, CS and EA, were uncovered by COI, as well an unpredicted SWA+CS group. The 16S fragment detected a low genetic variation, probably owing to a recent lineage differentiation, which was estimated by the COI molecular clock. We evaluated the role of the biological traits of A. scabra, as well as the consequences of Panama Isthmus closure and Pleistocene glaciation cycles in the lineage isolation of WGM and EA, as well as the genetic connectivity shown within regions and between CS and SWA. Our results highlighted that amphidromous species genetically connected over large scales should be genetically characterised in their wide distribution to provide more comprehensive systematics and to assist decision-making in biological conservation. (AU)

• FAPESP's process: 09/54931-0 - Improvement and management of biological specimen collections at the Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
• Grantee: Carlos Alberto Garofalo
• Support Opportunities: Research Infrastructure Program - Biological specimen collections
• FAPESP's process: 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)
• Grantee: Fernando Luis Medina Mantelatto
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants