title: The population density of Lymnaea columella (Say, 1817) (Mollusca, Lymnaeidae) an intermediate host of Fasciola hepatica (Linnaeus, 1758), in the Caparaó microregion, ES, Brazil.
abstract: The aim of this study was to monitor the population density of Lymnaea columella, an intermediate host of Fasciola hepatica, in various aquatic habitats and in drinking water in the area of the Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo, on Caparaó Microregion, municipality of Alegre, state of Espírito Santo, Brazil. Monthly samplings were performed at certain points between drainage areas and drinking water in cattle and goat production systems during the years 2010 to 2013. The mean temperature, precipitation and the frequency of samples of L. columella were analysed graphically according the monthly average during the study period. A total of 2,038 molluscs were collected, 1558 of which were L. columella, that predominated in all sampled points. The highest average of specimens observed for L. columella was in the years 2010 and 2013 (51.0), and occurred decreased in 2011 (19.8). The temperature and precipitation averaged is 23.7 °C and 141 mm/year, respectively. Rainfall peak occurred in March (2011, 2013) and November (2012), during these periods the population of L. columella growth. There was no significant difference in the relationship between the specimens observed with seasons (dry-wet), thus the population of L. columella remained stable and can be found throughout the year.
authors.affiliation: Instituto de Higiene e Medicina Tropical, Universidade Nova de Lisboa, Lisboa, Portugal.
authors.forename: S C G
authors.initials: SC
authors.lastname: D'Almeida
authors.affiliation: Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
authors.forename: D F
authors.initials: DF
authors.lastname: Freitas
authors.affiliation: Departamento de Medicina Veterinária, Escola Superior São Francisco de Assis, Santa Teresa, ES, Brazil.
authors.forename: M B
authors.initials: MB
authors.lastname: Carneiro
authors.affiliation: Laboratório de Parasitologia, Universidade Federal do Espírito Santo, Alegre, ES, Brazil.
authors.forename: P F
authors.initials: PF
authors.lastname: Camargo
authors.affiliation: Laboratório de Parasitologia, Universidade Federal do Espírito Santo, Alegre, ES, Brazil.
authors.forename: J C
authors.initials: JC
authors.lastname: Azevedo
authors.affiliation: Laboratório de Parasitologia, Universidade Federal do Espírito Santo, Alegre, ES, Brazil.
authors.forename: I V F
authors.initials: IV
authors.lastname: Martins
mesh_terms: D000822:Animal Husbandry / Q000379:methods; D000818:Animals; D001938:Brazil; D002417:Cattle; D060766:Drinking Water / Q000032:analysis / Q000469:parasitology; D055669:Ecological and Environmental Phenomena; D005210:Fasciola hepatica / Q000502:physiology*; D020387:Food Chain; D006041:Goats; D006790:Host-Parasite Interactions; D056127:Hydrobiology / Q000379:methods; D008195:Lymnaea / Q000502:physiology*; D011156:Population Density; D012621:Seasons
chemical_list: D060766:Drinking Water