Population attributes of Littoraria angulifera (Gastropoda: Littorinidae) in mangroves in Bahia State, northeastern Brazil

Abstract Littoraria angulifera (Lamarck, 1822) is an estuarine gastropod of tropical occurrence, which lives mainly on trunks mangrove tree species. This study aimed to evaluate the population attributes this species, such as abundance, space-time distribution, sex ratio and recruitment in mangroves Bahia State, northeastern Brazil. The specimens were collected monthly throughout 2018, red Rhizophora mangle L. at two heights horizontal levels. Specimens that marine grass Spartina alterniflora Loisel also collected. After counting, biometrics sexing, returned alive environment. average size weight was higher (p<0.05) places with taller less sparse trees vertical distribution showed a preference for strata close soil. Both results are related shading protection against desiccation. Females more abundant than males, approximate F: M 1.4: 1. Recruits observed period, showing continuous reproduction species peak spring (September November). revealed importance keep intact allow maintenance natural stocks