Variação temporal e espacial de metabólitos secundários da esponja Desmapsamma anchorata (Demospongiae)

Abstract

Desmpasamma anchorata is a widely distributed species on the coast of Brazil, can be found in various types of environments. The species is abundant on the rocky shores of Ilha Grande Bay. Shows how striking feature overgrowth, and is considered one of the main epibionts sponges on other organisms. It's a great competitor for space, being able to damage the tissues of coral invaders Tubastraea spp. it also produces a variety of secondary metabolites, especially fatty acids and sterols. However, the concentration of secondary metabolites may vary in different parts of an organism, between different individuals from the same population and among populations of the same species. The objectives of this study is: 1) Evaluate the occurrence of variation in the production of intra- and inter secondary metabolites D. anchorata; 2) Evaluate the occurrence of temporal variation in the production of secondary metabolites and the existence of trade-off between growth and metabolic production in D. anchorata. The cholest-5-en-3β-ol sterol (cholesterol) and methyl ester of 5,9-hexacosadienoico acid was the major compounds in crude extracts D. anchorata. The concentration of alkaloids ranged between regions basal and distal of the colonies of D. anchorata the Abraãozinho and Lagoa Azul, but the intra and inter samples D. anchorata no significant metabolic changes. D. anchorata showed lower metabolic changes in 52 days after implantation of the experiment, but this result was not significant. D. anchorata no significant relationship between metabolic production and growth. Thus, the results presented here do not support the hypotheses of Optimal Defense and Balance between growth and differentiation