ARTISANAL FISHING UNDER THE INFLUENCE OF THE HYDROLOGICAL REGIME IN NEOTROPICAL RIVER

• DOI: 10.22533/at.ed.9732122140110

• Palavras-chave: Overfishing; Araguaia River; Amazon River basin; fishery yields

• Keywords: Overfishing; Araguaia River; Amazon River basin; fishery yields

• Abstract:

  Seasonal changes in the hydrological regime in neotropical rivers may affect the composition, distribution and the abundance of freshwater fish species. The effects on fish communities have been linked to factors such as duration, frequency and periodicity of the hydrological regime, leading to changes in small-scale commercial fishing, within the flood and drought regime, that may affect the recruitment, size and distribution of the fishing effort. The present work has tested the hypothesis that the flood pulse of the Araguaia River influences the small-scale commercial fishing, evaluating the predictions that either in the temporal series, or in the flood, ebb and drought regime, influences the fishing income of the region. In the fishery landing analysis, between 2008 and 2011, it is seen a steep drop in capture volume from 2009. The identification of an overfishing context in the region has become evident with the decrease of yield, the increase of the number of fishermen, and the inversion of CPUEs (kg/fishermen) by daily yield (kg/day), with the catches exceeding the maximum sustainable yield (MSY) of 50 tons.

• Número de páginas: 18