The contribution of genetics in the study of the sea-bob shrimp populations from the brazilian coast

Abstract

Genetic studies can provide several important informations for sustainable fisheries management, mainly for the identification of different genetic stocks. In Brazil, genetic studies of the sea-bob shrimp, Xiphopenaeus kroyeri, produced important new information on the systematics of the genus, demonstrating the presence of anonymous cryptic species and outlining their geographical distribution and the levels of genetic diversity and population structuring of Brazilian species. Allozymes and sequence polymorphisms of the mitochondrial COI gene have also been used to beget diagnosis systems for the correct species identification. Recently, geometric morphometrics emerged as a powerful methodology for identifying operational taxonomic units, confirming genetic data with great similarity of results, and representing a promising tool to assist the identification of fishery stocks. Geometric morphometrics analyses were used to characterize Xiphopenaeus samples from Brazil, showing significant differences among populations, confirming previous patterns revealed by molecular data. This study gathers the information produced so far about the molecular systematics, patterns of geographic distribution of the cryptic Xiphopenaeus species, genetic and morphometric characterizations of variability and delineation of population boundaries. It intends to determine distribution and structuring consensus patterns of the genetic variability, aiming to support management and conservation actions as well as to identify gaps of knowledge and direct future efforts in order to address them.Keywords: Xiphopenaeus kroyeri; Xiphopenaeus riveti; cryptic species; molecular systematics; geometric morphometrics; fisheries genetics A CONTRIBUIÇÃO DA GENÉTICA NO ESTUDO DAS POPULAÇÕES DE CAMARÃO SETE-BARBAS DO LITORAL BRASILEIRO RESUMOEstudos genéticos podem fornecer diversas informações importantes para o manejo sustentável da pesca, tendo um relevante papel na identificação de estoques geneticamente distintos. No Brasil, estudos genéticos do camarão sete-barbas, Xiphopenaeus kroyeri, têm produzido novas e importantes informações sobre a sistemática do gênero, revelando espécies crípticas anônimas e delineando suas distribuições geográficas e os níveis de diversidade genética e estruturação populacional das espécies brasileiras. Alozimas e polimorfismos de sequência do gene mitocondrial COI também têm sido usados para gerar sistemas de diagnóstico para a identificação de espécies. Recentemente, a morfometria geométrica surgiu como uma metodologia poderosa para a identificação de unidades taxonômicas operacionais, confirmando os dados genéticos com grande similaridade de resultados, e representando uma ferramenta promissora para auxiliar na identificação dos estoques pesqueiros. Análises de morfometria geométrica foram utilizadas para caracterizar amostras de Xiphopenaeus do Brasil, mostrando diferenças significativas entre as populações, confirmando padrões anteriores revelados por dados moleculares. Este trabalho reúne as informações ...

Population Structure of the Atlantic Seabob Shrimp Xiphopenaeus kroyeri (Heller, 1862) Based on Geometric Morphometrics

“…Considering that gonadal maturation requires warmer temperatures (Dall et al, 1990), the lower temperature can cause the migration of the shrimps to warmer waters northern in the Atlantic Ocean (Grabowski et al, 2014). Herein, we suggest that the same migration patterns may occur to X. kroyeris s.s., which is not accordance with the findings of previous studies (Gusmão et al, 2013).…”

A multigene and morphological analysis expands the diversity of the seabod shrimp Xiphopenaeus Smith, 1869 (Decapoda: Penaeidae), with descriptions of two new species

“…15). Considering that X. kroyeri has been collected in Caracas (Venezuela) 9 and in São Luís, Maranhão (Brazil) 46 , the geographic distribution of these three species seem to overlap in the northern Atlantic coast of South America. In the present study, Xiphopenaeus dincao nov. sp.…”

“…Therefore, based on our data, and on Gusmão et al . 9,46 , Piergiorge et al . 10 and Kerkhove et al .…”

Sexual and ontogenetic morphometric variation in Xiphopenaeus kroyeri (Crustacea, Decapoda, Penaeidae): a new approach with linear and angular morphometric data

“…Morphological differences that determine cohorts, ontogenetic stages and sexual dimorphism in a population may be relevant information to support future studies on a taxon (Swain and Foote 1999;Turan et al 2006;Konan et al 2008Konan et al , 2010. For example, morphometric studies on prawns and shrimps have revealed populational variations (García-Dávila et al 2005;Konan et al 2008Konan et al , 2010, morphotypes (Rojas et al 2012), growth information (Jayachandran et al 1996;Kapiris 2005;Campos et al 2011;Reis et al 2017;Da Silva et al 2018), taxonomic differentiation (May-Kú et al 2006), allometric differences between fishery stocks, (Paramo and Saint-Paul 2010;Barbosa-Saldaña et al 2012), ontogenetic variations (Chow and Sandifer 1991), sexual dimorphism (Kapiris and Thessalou-Legaki 2001;Accioly et al 2013), and shape variations between fishery stocks (Bissaro and Gomes-Jr 2012) and populations (Gusmão et al 2013).…”