Base de dados direcionada à elaboração de um programa de monitoramento de águas continentais utilizando moluscos bivalves

• Ano de defesa: 2003
• Autor(a) principal: Callil, Claudia Tasso
• Orientador(a): Mansur, Maria Cristina Dreher
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: BIOLOGIA; ZOOLOGIA; MALACOLOGIA; MOLUSCOS - MATO GROSSO; BIVALVES
• Link de acesso: http://hdl.handle.net/10923/5406

Informations on biological and ecological aspects of bivalve molluscs occurring in Mato Grosso State compound the body of this thesis work. Pioneer registers about two species of Anodontites Bruguière, 1792, a Neotropical endemic genus, are considered like: ultrastructural morphology of the shells; populational behavior based on biometrical parameters; gametogenesis and sexual cycle; and patterns related to the selection of feeding particles, filtration rate and respirometry. Using aspects of functional morphology, experimental and population ecology, the main results are: 1. A. trapesialis and A. elongatus present the valves formed by three sheets: periostracum, prismatic and nacreous layers like other Unionoida. Structures like folds, arches, microstriae and spikes are described and differentiated between the species; 2. Comparing the populations sampled in different localities, both species present significant differences in the variants like the shell weight and high being demonstrated that they exhibit phenotypic plasticity according to environmental differences. 3. The two species are spermatozeugmata with continuous gametogenesis during all the year, presenting peaks of production and releasing of gametes during draught and ebbing period. 4. A. trapesialis presents a comparative high filtration efficiency, with the capacity of retaining particles between 0. 5 to 1. 5 g. l-1/h. Parallel to the development of studies on native species, the presence of two invasive bivalve species was detected: Corbicula largillierti (PHILIPPI, 1844) and C. fluminea (MÜLLER, 1774).As a complement to the present thesis, a chapter was added including the history of Corbiculidae invasion in South America, with biometrical data of populations applicable to differentiate both species in the northern limits of Pantanal of Mato Grosso. All this assemblage of informations attempt to mount a base of data to subsidise the elaboration of a program in order to control the biodiversity and monitorate the quality of continental waters, using freshwater bivalves as "sentinel organisms" and as indicators of environmental changes.