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      New record of the invasive snail Melanoides tuberculata (Gastropoda, Thiaridae) - Ceará State, Brazil Translated title: Novo registro do gastropode invasor Melanoides tuberculata (Gastropoda, Thiaridae) – Estado do Ceará, Brasil

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          Abstract

          Abstract Melanoides tuberculata is a freshwater gastropod native to Africa and Asia, and currently presents distributed worldwide. The first record of Melanoides tuberculata in South America occurred in Brazil, in the city of Santos, state of São Paulo, in 1967. Therefore, the objective of the present study is to report the occurrence of Melanoides tuberculata for Banana Lagoon and to characterize the current population situation. The gastropods were collected through direct visualization of shells, morphometric measurements of Melanoides tuberculata shells were determined using a digital caliper. After identifying the gastropod and its first distribution in the area, a preliminary descriptive analysis of the population was carried out. The gastropods were classified by grouping the individuals into four classes according to the shell width (mm). This is the first record of the occurrence of Melanoides tuberculata, in Banana Lagoon, Caucaia municipality, Ceará state, Northeast Brazil, being the largest specimen cited in the literature (33.77 mm) and 92.65% of the gastropods present in sizes above the first reproduction stages.

          Translated abstract

          Resumo Melanoides tuberculata é um gastrópode de água doce nativo da África e da Ásia e atualmente apresenta-se distribuído mundialmente. O primeiro registro de Melanoides tuberculata na América do Sul ocorreu no Brasil, na cidade de Santos, estado de São Paulo, em 1967. Portanto, o objetivo do presente estudo é relatar a ocorrência de Melanoides tuberculata para Lagoa do Banana, caracterizando a situação atual da população no local. Os gastrópodes foram coletados através da visualização direta de conchas, e as medidas morfométricas das conchas de Melanoides tuberculata foram determinadas por meio de um paquímetro digital. Após identificar o gastrópode e constando sua primeira distribuição na área, realizou-se uma análise preliminar descritiva da população. Os gastrópodes foram classificados agrupando os indivíduos em quatro classes de acordo com a largura da concha (mm). Este é o primeiro registro da ocorrência de Melanoides tuberculata, na Lagoa da Banana, município de Caucaia, estado do Ceará, Nordeste do Brasil, sendo o maior exemplar citado na literatura (33,77 mm) já registrado e 92,65% dos gastrópodes apresentam-se em tamanhos acima do primeiro estágios de reprodução.

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          The freshwater aquarium trade as a vector for incidental invertebrate fauna

          Ian Duggan (2010)
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            A molecular phylogeography approach to biological invasions of the New World by parthenogenetic Thiarid snails.

            The parthenogenetic snail Melanoides tuberculata, present in tropical fresh waters of most of the Old World before 1950, has now invaded the Neotropical area. The phylogeography of this snail was studied to evaluate the pathways and number of such invasions. Because of parthenogenetic reproduction, individuals are structured into genetical clones. Within populations from both the original and invaded areas, several morphologically distinct clones (referred to as morphs) often coexist but the amount of genetic divergence among morphs is unknown. Individuals from 27 morphs and 40 populations world-wide were sequenced at two mitochondrial genes (12S and 16S). Our phylogenetic reconstruction suggests that (i) most of the morphological variation observed in the New World predates invasion, (ii) at least six independent introductions have occurred, and (iii) invasive clones are found throughout most of the phylogenetic tree and do not come from a particular region of the area of origin. Two ideas are discussed in the light of these results. The first lies with the specificities of parthenogenesis in an invasion context. While in sexual species, independently introduced populations eventually merge into a single invasive population, in a parthenogenetic species independently introduced clones have distinct invasion dynamics and possibly exclude each other. Second, although repeated invasions in Melanoides may have an impact on indigenous molluscan faunas, their most likely effect is the world-wide homogenization of the invasive taxon itself.
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              The introduction of Melanoides tuberculata (Mollusca: Thiaridae) to the island of Saint Lucia (West Indies) and its role in the decline of Biomphalaria glabrata, the snail intermediate host of Schistosoma mansoni.

              A malacological survey was carried out in May 1992 in the whole hydrographic system of Saint Lucia 11 years after the end of a biological control programme to eliminate Biomphalaria glabrata, the snail intermediate host of Schistosoma mansoni. A competitor snail, Melanoides tuberculata, was introduced to Saint Lucia in 1978 and field experiments in several habitats were conducted by Prentice between 1978 and 1986. At the present time M. tuberculata is the most common freshwater snail in Saint Lucia. The results of the survey, undertaken in sites where B. glabrata occurred in large populations in the past showed (i) the absence of the snail hosts from seven sites now extensively colonized by the competitor (ii) the presence of B. glabrata in low or very low densities in 17 sites together with the competitor and (iii) the presence of the intermediate hosts in large populations in only two sites where M. tuberculata was absent. These results confirm the positive results observed by Prentice. The presence of another planorbid snail, B. straminea, is reported for the first time in Saint Lucia.
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                Author and article information

                Journal
                bjb
                Brazilian Journal of Biology
                Braz. J. Biol.
                Instituto Internacional de Ecologia (São Carlos, SP, Brazil )
                1519-6984
                1678-4375
                June 2020
                : 80
                : 2
                : 368-372
                Affiliations
                [01] Belém Pará orgnameUniversidade Federal Rural da Amazônia orgdiv1Instituto Socioambiental e dos Recursos Hídricos orgdiv2Programa de Pós-graduação em Aquicultura e Recursos Aquáticos Tropicais Brazil
                [02] Belém Pará orgnameUniversidade Federal Rural da Amazônia orgdiv1Programa de Pós-graduação em Saúde e Produção Animal na Amazônia Brazil
                Article
                S1519-69842020000200368 S1519-6984(20)08000200368
                10.1590/1519-6984.210408
                493d2f92-957d-4058-bffb-38a9dfd7392d

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 11 January 2019
                : 03 August 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 34, Pages: 5
                Product

                SciELO Brazil

                Self URI: Full text available only in PDF format (EN)
                Categories
                Original Article

                invasive species,gastropod,molluscs,água doce,distribuição,espécie invasora,gastrópode,molusco,freshwater,distribution

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