Abstract
Aquarium trade is one of the most important pathways of biological invasion. Much attention has been given to target introduced species, but little is discussed on the associated bycatch ones. The aim of this paper is to analyze the risk of invasion by non-commercial invertebrates using aquarium stores as a model. Monthly visits to eight stores in Aracaju (Sergipe State) were performed from April to September 2011. Inspections were carried out and questionnaires were applied to owners and employees of the establishments. Two non-native species were identified, Melanoides tuberculatus (Gastropoda: Thiaridae) and Lernaea cyprinacea (Crustacea, Copepoda). Sixty-two specimens of M. tuberculatus were found among the aquatic plants in one of the stores, while L. cyprinacea was collected in four establishments parasitizing Carassius auratus, Hypostomus sp., Poecilia latipinna, Poecilia sphenops, Poecilia reticulata and Xiphophorus hellerii. The interviews that have been done with owners and employees revealed that none of the stores has submitted fishes and plants to quarantine, and the disposal of wastewater is directly into the sewer system. It is necessary to adopt preventive measures such as a quarantine period for fishes and the creation of a warning about the dangers of biological invasions or aquarium dumping for aquarium hobbyists to mitigate the risk of invasion.Keywords: bioinvasion, Lernaea cyprinacea, Melanoides tuberculatus.
Highlights
The ornamental fish industry moves more than U$15 billion per year worldwide (Projeto Piaba, 2001), and over 60% of this amount comes from exporting fishes from developing countries like Brazil, Colombia, Indonesia, and Malaysia, which represents more than U$ 400 million of sold fishes (Projeto Piaba, 2001; Cardoso and Igarashi, 2009)
A questionnaire was applied to owners and employees, asking about procedures adopted after the acquisition of fishes, parasite detection, disposal of aquariums wastewater, and the knowledge about biological invasions
M. tuberculatus is transported by the plants from where they grow to the stores
Summary
The ornamental fish industry moves more than U$15 billion per year worldwide (Projeto Piaba, 2001), and over 60% of this amount comes from exporting fishes from developing countries like Brazil, Colombia, Indonesia, and Malaysia, which represents more than U$ 400 million of sold fishes (Projeto Piaba, 2001; Cardoso and Igarashi, 2009). Sessenta e dois espécimes de M. tuberculatus foram coletados em meio às plantas em uma das lojas, enquanto L. cyprinacea foi registrada em quatro estabelecimentos parasitando Carassius auratus, Hypostomus sp., Poecilia latipinna, Poecilia sphenops, Poecilia reticulata e Xiphophorus hellerii. The large number of invertebrate species that have been traded in aquarium business greatly increases the risk of invasion in terms of the colonization pressure (Magalhães and Costa, 2007).
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