%0 Journal Article
%T Evaluation of the stocks of Hypnea musciformis (rhodophyta: gigartinales) on two beaches in Bahia, Brazil
%A Taiara Aguiar Caires
%A Iara Oliveira Costa
%A Priscila Barreto de Jesus
%A Mara Rojane Barros de Matos
%J Brazilian Journal of Oceanography
%D 2013
%I Universidade de S?o Paulo
%X Hypnea musciformis occurs widely in the northeast coast of Brazil, and it is one of the most important natural sources of k-carrageenan, which is used in food and cosmetic industries. Despite its potential for exploitation little is known about its ecology. The aim of this study was to investigate the biology and ecology of H. musciformis in Brazil through analyses of biomass stock and accompanying flora. Two populations of H. musciformis were analyzed: those on the beaches of Stella Maris and Itacimirim (Bahia, Brazil). Eight samplings were conducted between 2007 and 2009 during the dry and rainy seasons. The algae were sampled along transects (20 m) using quadrats (0.04 m2) in three different hydrodynamic regions of the reefs (TP, PRR and FRR). The t-Test, Dunn's Test and parametric and nonparametric ANOVA were used for statistical analyses. 17 host species and 41 associated species were identified. The highest biomass stock was observed during the dry season. On Stella Maris, the region with the highest biomass stock was FRR; on Itacimirim, TP had the highest biomass value. This study permits the assumption that seasonality, microhabitat, hydrodynamic and micro scale factors contribute to variation in biomass stock in H. musciformis populations. Hypnea musciformis ocorre amplamente na costa nordeste do Brasil, sendo uma das mais importantes fontes naturais de k-carrageenana que ¨¦ utilizado nas ind¨²strias aliment¨ªcia e cosm¨¦tica. Apesar do potencial de explota  o, pouco se sabe sobre sua ecologia. O objetivo deste estudo foi conhecer a biologia e ecologia de H. musciformis no Brasil atrav¨¦s da an¨¢lise do estoque de biomassa e da flora acompanhante. Duas popula  es de H. musciformis foram analisadas nas praias de Stella Maris e Itacimirim (Bahia, Brasil). Oito amostragens foram realizadas entre 2007 e 2009, durante as esta  es seca e chuvosa. As algas foram coletadas ao longo de transectos (20 m) utilizando quadrados (0,04 m2) em tr¨ºs diferentes regi es hidrodinamicas dos recifes (TP, PRR e FRR). t-Test, Teste de Dunn e ANOVA param¨¦trica e n o-param¨¦trica foram utilizados para a an¨¢lise estat¨ªstica. Foram identificadas 17 esp¨¦cies hospedeiras e 41 esp¨¦cies associadas. O maior estoque de biomassa foi observado durante a esta  o seca. Em Stella Maris, a regi o com maior estoque de biomassa foi FRR, e em Itacimirim, TP apresentou biomassa maior. Este estudo permite supor que sazonalidade, microhabitats, hidrodinamismo e fatores em microescala contribuem para a varia  o no estoque de biomassa em popula  es de H. musciformis.
%K Bahia
%K Biomassa
%K Carragen¨®fita
%K Varia  o Sazonal
%K Alga
%K Bahia
%K Biomass
%K Carragenophyte
%K Seasonal Variation
%K Seaweed
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592013000100007