Gastrópodes límnicos do Campus de Manguinhos, Fundação Oswaldo Cruz, Rio de Janeiro, RJ

Abstract

A survey of freshwater gastropods of the Campus of Manguinhos, Fundação Oswaldo Cruz, Rio de Janeiro, was carried out during the last two years aiming to compare the current species with those found at the beginning of this century. Among 18 breeding sites in 880,000m2 of the surveyed area, 13 showed the following species: Antillorbis nordestensis; Biomphalaria glabrata; Biomphalaria straminea; Lymnaea columella; Melanoides tuberculatus; Physa cubensis; Pomacea glauca and Pomacea lineata. Notably, Biomphalaria tenagophila reported by Lutz in 1918, had disappeared and B. straminea and the Asiatic thiarid M. tuberculatus had been introduced. No specimens infected with Schistosoma mansoni were found.

Freshwater mollusks from three reservoirs of Piauí, northeastern Brazil

“…The high number of individuals observed is a consequence of the set of biological traits mentioned, which allows M. tuberculata to become a successful competitor in new environments, capable of even suppressing the growth of native species population. The role of this invasive species in the reduction of native species have been described in different environments (Freitas et al 1987, Pointier 1999, Fernandez 2001, Almeida et al 2018). There are reports of the decline in B. glabrata and B. straminea densities from the Southeastern region (Giovanelli et al 2003, Almeida et al 2018, as well as it was responsible for the low diversity and density indices of native species in Northeastern reservoirs (Almeida et al 2018).…”

“…Routinely and inadvertently, freshwater mollusks are introduced in new environments with aquatic plants, fish and anthropic action linked with aquaculture (Strong et al 2008). Negative consequences of this introduction are diverse, including: (1) partial or total natural populations substitution (Freitas et al 1987, Pointier 1999, Fernandez 2001; (2) health damage to both humans and other animals through the dissemination of larval stages of parasites (Pinto & Melo 2011); and (3) economic, causing damages to companies building structures because of the accumulation of these organisms (Santos et al 2012, Vogler 2012.…”

New records of the invasive mollusk Melanoides tuberculata (Müller, 1774) (Gastropoda, Thiaridae) in the Brazilian Northeast

“…This set of biological features allow for M. tuberculata to out-compete with other species in newly invaded places mainly due to its capacity to suppress populations of native species. Its presence in reservoirs in semiarid Brazil is said to be responsible for the low diversity of native mollusks in these areas (Almeida et al 2018). Fernandez et al (2001 reported on the decline of a population of Pomacea lineata (Spix, 1827) due to the presence of M. tuberculata.…”

Macroinvertebrados bentônicos e a estrutura do habitat em um rio intermitente do semiárido brasileiro

“…Thiaridae was another abundant taxa recorded in the present study, mostly during the dry phase. This is an exotic taxon of Asian origin, resistant to desiccation and widespread through several tropical countries (Fernandez et al, 2001). Besides the absence of a natural predator or other factor controlling their populations, the slightly alkaline pH and warm water temperatures may have favored the Gastropoda, such as the Thiaridae and Planorbidae, since they have been reported in high densities in warm and alkaline environments (Abílio et al, 2006;Santos and Eskinazi-Sant'Anna, 2010).…”