First occurrence of the exotic Asian clam Corbicula fluminea (Muller, 1774) in the Jundiaí-Mirim River Basin, SP, Brazil

Abstract

Corbicula fluminea is a naturally occurring Asian bivalve that was spread around the world, and which has become a highly aggressive invasive species in many countries. C. fluminea has many ecological, economic and social impacts, such as the extinction of native species, ecosystems alterations, and damage to pipes and hydropower turbines. As an illustration of the potential damage that proliferation of C. fluminea can cause, it is noted that the United States government spends more than 1 billion dollars per year to control this species. This work recorded the first occurrence of the Asian clam C. fluminea in the Jundiaí-Mirim Basin, SP, Brazil, and included basic ecological information such as density, frequency distribution of size and species distribution along the basin. Seventy-eight individuals were sampled with a van Veen grab along the basin. The specimens were identified and measured. The exotic species was found only in two of four sampling points and its distribution was possibly influenced by sediment composition and water flow. Moderate densities were calculated, ranging from 12 to 235 ind.m -2 . Our data suggest that young populations are growing in the basin. The presence of C. fluminea is a concern for the maintenance of the ecosystem and for different water uses in the Jundiai region.Keywords: invasive species, Corbiculidae, Bivalve. Primeiro registro de ocorrência do bivalve exótico Corbicula fluminea(Muller, 1774) na microbacia do Rio Jundiaí-Mirim, SP, Brasil RESUMOCorbicula fluminea é um bivalve exótico natural da Ásia que espalhou-se rapidamente pelo mundo tornando-se uma espécie invasora altamente agressiva em muitos países. A espécie tem o potencial de provocar uma série de impactos ecológicos, econômicos e sociais como a extinção de espécies nativas, alterações em ecossistemas e danos em tubulações e turbinas de hidrelétricas. Como exemplo dos danos que a espécie pode gerar, basta mencionar que o governo dos Estados Unidos gasta anualmente mais de 1 bilhão de dólares com a espécie. Os objetivos deste trabalho foram registrar a primeira ocorrência do bivalve invasor C. fluminea na bacia do rio Jundiaí-Mirim, SP, Brasil bem como contribuir com alguns dados ecológicos básicos como densidade, distribuição de frequências de tamanho bem como a distribuição da espécie ao longo da bacia hidrográfica. Um total de 78 indivíduos foi coletado com draga van Veen. Os organismos foram identificados e medidos. O molusco foi registrado em apenas duas das quatro estações amostrais e sua distribuição provavelmente relaciona-se com a composição do sedimento e fluxo da água. Valores intermediários de densidade foram registrados variando de 12 a 235 ind.m -2 . Os dados sugerem populações jovens que estão em crescimento na bacia. A presença de C. fluminea é uma questão preocupante no que concerne a manutenção do ecossistema e da água para diferentes usos na região de Jundiaí, SP.Palavras-chave: espécie invasora, Corbiculidae, Bivalvia.

Dissecting the chromosome-level genome of the Asian Clam (Corbicula fluminea)

“…On account of short sexual maturity time, rapid growth, short life cycle and planktonic veliger stage, C. fluminea has strong diffusion ability 85 , and it is considered as an alien species in America and Europe 11 – 13 . The strong reproductive capacity and a powerful immune system might be bound to play an important role.…”

“…In foreign countries, C. fluminea was first recorded as in the early twentieth century 10 . They may have spread worldwide by carried as food resource /unintentionally attaching to the hull or though ballast waters, then occupying rivers and lakes and becoming alien invasive species in American and European ecosystems 11 – 13 .…”

Dissecting the Chromosome-Level Genome of The Asian Clam (Corbicula Fluminea)

“…In foreign countries, C. uminea was rst recorded as in the early 20th century [10]. They may have spread worldwide by carried as food resource /unintentionally attaching to the hull or though ballast waters, then occupying rivers and lakes and becoming alien invasive species in American and European ecosystems [11][12][13].…”

Can a one-sampling campaign produce robust results for water quality monitoring? A case of study in Itupararanga reservoir, SP, Brazil

“…The water bodies provide many services for humanity but the misusage of them or of the surroundings can seriously compromise water quality and availability (Cunha et al, 2013;Suriano & Fonseca-Gessner, 2013;Silva & Costa, 2015). Some of the most widespread impacts are: riparian forestry removal (Torres & Ramirez, 2014); the contamination promoted by agrochemicals (Giraldo et al, 2014;Díaz-Barriga et al, 2015), industrial and domestic wastes (Maceda-Veiga et al, 2013) as also the exotic species introduction (Beghelli et al, 2014a;Fernandez et al, 2014;Rietzler et al, 2014). There is a growing number of pollutants detected in different kinds of environments.…”