Affiliation:
1. Universidade Estadual de Santa Cruz, Brasil; Universidade Estadual de Santa Cruz, Brasil
2. Universidade Estadual de Santa Cruz, Brasil
Abstract
Abstract Littoraria angulifera (Lamarck, 1822) is an estuarine gastropod of tropical occurrence, which lives mainly on trunks of mangrove tree species. This study aimed to evaluate the population attributes of this species, such as abundance, space-time distribution, sex ratio and recruitment in mangroves in Bahia State, northeastern Brazil. The specimens were collected monthly throughout 2018, on trunks of the red mangrove Rhizophora mangle L. at two heights and on two horizontal levels. Specimens that were on the marine grass Spartina alterniflora Loisel were also collected. After counting, biometrics and sexing, the specimens were returned alive to the environment. The average size and weight of L. angulifera was higher (p<0.05) in places with taller and less sparse trees and the vertical distribution on the trunks showed a preference for strata close to the soil. Both results are related to shading and protection against desiccation. Females were more abundant than males, at an approximate sex ratio F: M of 1.4: 1. Recruits were observed throughout the period, showing continuous reproduction of the species with a recruitment peak in spring (September to November). The study revealed the importance of keep the mangroves intact to allow the maintenance of the natural stocks of the species.
Subject
General Agricultural and Biological Sciences
Reference23 articles.
1. A field guide to shells: Atlantic and Gulf coasts and the West Indies (The Peterson Field Guide).;ABBOTT R.T.,1995
2. Composition and distribution of benthic molluscs on intertidal flats of Paranaguá Bay (Paraná, Brazil);BOEHS G.;Scientia Marina,2004
3. Seasonal growth patterns in the tropical littorinid snails Littorina angulifera and Tectarius muricatus.;BURGETT J.M.;The Veliger,1987
4. Entre o seco e o molhado, do costão ao manguezal: distribuição de gastrópodes da família Littorinidae em gradientes vertical e horizontal no litoral do estado de São Paulo.;CHAVES A.M.R.,2002
5. CLIMATEMPO,2020
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献