| Autor: |
Carvalho MCM; Universidade Estadual do Maranhão - UEMA, Programa de Pós-graduação em Ecologia e Conservação da Biodiversidade, São Luís, MA, Brasil., Abreu AS; Universidade Estadual do Maranhão - UEMA, Programa de Pós-graduação em Ecologia e Conservação da Biodiversidade, São Luís, MA, Brasil., Silva MS; Universidade Estadual do Maranhão - UEMA, Departamento de Biologia, São Luís, MA, Brasil., Cantanhede SPD; Universidade Estadual do Maranhão - UEMA, Programa de Pós-graduação em Ecologia e Conservação da Biodiversidade, São Luís, MA, Brasil., Monroe TGR; Universidade Federal do Maranhão - UFMA, Programa de Pós-graduação em Biodiversidade e Biotecnologia da Amazônia Legal, São Luís, MA, Brasil., Araújo LS; Universidade Estadual do Maranhão - UEMA, Departamento de Biologia, Laboratório de Biodiversidade Molecular, São Luís, MA, Brasil., Tchaicka L; Universidade Estadual do Maranhão - UEMA, Programa de Pós-graduação em Ecologia e Conservação da Biodiversidade, São Luís, MA, Brasil.; Universidade Estadual do Maranhão - UEMA, Programa de Pós-graduação em Biodiversidade e Biotecnologia da Amazônia Legal, Laboratório de Biodiversidade Molecular, São Luís, MA, Brasil. |
| Abstrakt: |
Several aquatic ecosystems present favorable conditions for the establishment of freshwater gastropod populations in Maranhão (Brazil). However, research on these snails in this Brazilian state is more focused on Baixada Maranhense, an endemic area for schistosomiasis in Maranhão. Considering the need to expand information on the occurrence of limnic gastropods in Maranhão, a qualitative study was carried out in the Microregion of Lençóis Maranhenses. The capture of freshwater snails was carried out between June 2016 and November 2019. Were obtained 3,244 specimens of freshwater gastropods: 2,372 specimens of Biomphalaria straminea (Dunker, 1848); 17 specimens of Biomphalaria schrammi (Crosse, 1864); 19 specimens of Drepanotrema lucidum (Pfeiffer, 1939); 115 specimens of (Hydrobiidae; Rissooidea); 24 specimens of Physa marmorata Guilding, 1828; 73 specimens of Pomacea maculata (Perry, 1810); 613 specimens of Pomacea sp. (Perry, 1810). Were also found 11 shells of Biomphalaria glabrata (Say, 1818). The greatest richness of snails was observed in Tutóia. The most abundant species during the study was B. straminea (73,45%). Pomacea sp. was the most representative species with constant frequency (57,15%) in the Lençóis Maranhenses Microregion, present in lentic and lotic ecosystems. The forecast maps indicate the possibility of occurrence and establishment of freshwater gastropods species throughout the investigated region. The presence of gastropods that are hosts of parasites represents a risk to human health, especially in the Lençóis Maranhenses area, which is one of Brazil's tourist destinations. Studies on the occurrence and distribution of limnic gastropods are of great relevance for understanding the conservation status of existing species. Furthermore, they are necessary to monitor snails that act as parasite hosts. |
