Análise de Agrupamento da Ictiofauna Recifal do Brasil com Base em Dados Secundários: Uma Avaliação Crítica.

Abstract

A literatura que trata da diversidade é bastante numerosa e disponibiliza informações fundamentais que podem ser utilizadas como banco de dados para pesquisas com outros enfoques científicos. O presente trabalho reúne 185 espécies de peixes recifais brasileiros retiradas de listas contidas em 16 publicações e propõe uma análise de agrupamento, fornecido através do coeficiente de Jaccard. Os resultados destacam dois grupos principais formados pelas ilhas oceânicas e outro pelas localidades da costa. Com base na interpretação deste agrupamento, as autoras discutem as questões conceituais sobre os estudos zoogeográficos e as metodologias utilizadas para os levantamentos ictiofaunísticos. Palavras-chave:Diversidade, zoogeografia, análise de agrupamento, peixes recifais, Brasil.Cluster analysis of brazilian reef fishes based on secondary date: a critical avaliation. ABSTRACTThe bibliography concern diversity is very large, and gives fundamental information that could be used as secondary date for scientific research. This paper uses 185 Brazilian reef fishes took from 16 papers, and propose a cluster analysis by Jaccard coefficient. The result showed two distinct groups: oceanic isles and coastal areas. Based on this cluster analysis, the authors make some concepts considerations about zoogeography and methods to obtain a fish list.

Reef fish assemblage and zoogeographic affinities of a scarcely known region of the western equatorial Atlantic

“…The overall pattern that emerged from the cluster analysis (Figure 2) agreed with previous studies, showing a clear distinction of the fauna from the oceanic islands (Floeter & Gasparini, 2000; Feitoza, 2001; Rocha & Rosa, 2001; Araújo & Feitosa, 2003; Moura, 2003). This is somewhat expected considering the degree of isolation and small dimension of the Rocas Atoll and St Paul's Rocks, but local ecological factors may have importance as well (Rocha, 2003).…”

“…Thus, it becomes clear that the ecosystem is understudied as a whole. In terms of biogeography studies including reef fish from Ceará State, there are only two contributions (Araújo & Feitosa, 2003; Moura, 2003), but despite that, this scarcity was noted in the most relevant papers about the south-western Atlantic fish biogeography (e.g. Floeter & Gasparini, 2000; Feitoza et al , 2005; Floeter et al , 2008).…”

A univariate and multivariate study of reef fisheries off northeastern Brazil

“…Lutjanus synagris and L. vivanus were more abundant in shallow and deeper waters, respectively, but L. analis, L. chrysurus, and L. jocu were more evenly distributed though their abundance peaked in intermediate depths of the continental shelf (Frédou and Ferreira, 2005). Although in some instances the diversity may have been partially influenced by the biogeography of the reef assemblage Joyeux et al, 2001;Araújo and Feitosa, 2003), it is of note that diversity was less in the state with a wide continental shelf (Rio Grande do Norte) than in the states with a narrow shelf (Alagoas and Bahia). Fleets that operate over a wide shelf do not reach deep water easily, so most of their catch comes from a homogeneous environment, whereas fleets operating on a narrow shelf can exploit a larger range of environments and quite probably a more diverse species assemblage.…”

Use of intertidal areas by shrimps (Decapoda) in a brazilian Amazon estuary

“…Survival conditions become critical in this environment due to increased temperature and salinity (Nybbaken 1997). Tide pools can determine local differences about the diversity of species (Araújo and Feitosa 2003), because they are environments with a complex biodiversity, which are internally subject to intense variations of physicalchemical conditions and biological interactions (Metaxas and Scheibling 1993).…”