Factors regulating diversity and abundance of fish communities in Pantanal lagoons, Brazil
Authors: Súarez, Yzel Rondon; Petrere, Miguel; Catella, Agostinho Carlos
Source: Fisheries Management & Ecology, Volume 11, Number 1, February 2004 , pp. 45-50(6)
The factors effecting fish species richness, evenness and relative abundance in 19 floodplain lagoons in the Pantanal (Brazil) were examined. Richness and evenness were strongly correlated with the lagoon's: (i) isolation time from the main river; (ii) depth; and (iii) distance from the main river. Abundance of the five dominant fish species was correlated mainly with: (a) macrophyte cover; (b) the distance from the main river; and (c) piscivore abundance. These results suggest that the species select lagoons to avoid or minimize their confinement in inappropriate floodplain habitats. A combination of strategies, together with variations in the lagoon's connection period, determines the diversity and abundance of the fish species in the Nhecolândia Pantanal.
Document Type: Research Article
Publication date: February 1, 2004