Distribution of entomofauna associated with aquatic macrophytes in the reflux of the Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil/ Distribuicao da entomofauna associada as macrofitas aquaticas na vazante do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil

• Published in: Acta scientiarum. Biological sciences 2009-04, Vol.31 (2), p.127
• Main Authors: da Silva, Fabio Henrique, Favero, Silvio, Sabino, Jose, Garnes, Silvio Jacks dos Anjos
• Format: Article
• Language: Spanish
• ISSN: 1679-9283
• DOI: 10.4025/actascibiolsci.v31i2.1182

This work aimed ato research the distribution of insects associated with aquatic macrophytes and the similarity among collection sites during the reflux period in a stretch of Correntoso river, Pantanal do Negro, Mato Grosso do Sul State, Brazil. The collection sites were determined by changes in the riparian formation structure, characterized as open when there is communication with flooded fields and intermediary and closed when there is not any communication with flooded fields. Three collections were taken at six sample sites, during reflux periods. The organisms were collected using a D net, 300 [micro]m mesh, with samples from five nets thrown in roots of aquatic macrophytes. Family richness, absolute and relative abundance of the insects found, and similarity of collection sites were analyzed using Euclidian distance and complete connection, Shannon-Wiener diversity index, with [log.sub.2]. Sixty-four families from 10 orders of Hexapoda class were registered, totaling 2,525 individuals--2,405 of them aquatic and semiaquatic, and 120 terrestrial. The collect sites did not present a fixed model of similarity, and the formation of groups occurred in distinct forms at each collection. Key words: aquatic entomofauna, Pantanal, floodplain. Este trabalho teve como objetivo pesquisar a distribuicao de insetos associados a macrofitas aquaticas e a similaridade dos sitios de coleta, no periodo de vazante, em um trecho do rio Correntoso, Pantanal do Negro, Estado do Mato Grosso do Sul, Brasil. Os sitios de coleta foram determinados conforme a mudanca na estrutura da formacao riparia, caracterizados como abertos com comunicacao com campos inundaveis; intermediarios sem comunicacao com campos inundaveis; fechados sem comunicacao com campos inundaveis. Foram realizadas tres coletas durante o periodo de vazante, em seis sitios de coletas. Os organismos foram coletados utilizando rede D com malha de 300 [micro]m e esforco amostral de cinco lances de rede em raizes de macrofitas aquaticas. Foi analisada a riqueza de familias, a abundancia absoluta e relativa dos insetos encontrados, a similaridade dos sitios de coleta por analise de agrupamento, utilizando distancia euclidiana e ligacao completa, indice de diversidade de Shannon-Wienner, com [log.sub.2]. Foram registradas 64 familias de dez ordens da Classe Hexapoda, totalizando 2.525 individuos, 2.405 aquaticos e semi-aquaticos e 120 terrestres. Os sitios de coleta nao apresentaram padrao fixo de similaridade, e a