Análises Geoquímicas e respostas Ecotoxicológicas na Avaliação da Qualidade Ambiental de uma Área Estuarina Protegida

Abstract

Chapter 2-Chemical and Ecotoxicological approach Metal contamination in sediments from a Protected Area assessed by chemical and ecotoxicological approaches.

Seasonal environmental parameters influence biochemical responses of the fiddler crab Minuca rapax to contamination in situ

“…Altered biomarker activities in M. rapax during the summer may reflect the low salinity (< 0.5‰S) encountered in the estuary during that particular collection (Table 1) as a consequence of heavy rains. In C. danae during the austral summer (low salinity/elevated temperature), physiological and biochemical processes are also considerably altered, hampering detection of effects caused by environmental contaminants, especially metals (Araújo, 2014). However, when salinities are normalized against winter values, clear metal-related responses are discernible.…”

“…However, when salinities are normalized against winter values, clear metal-related responses are discernible. Thus, environmental factors like salinity and temperature appear to affect biochemical and physiological processes in aquatic crabs (Araújo, 2014).…”

“…a Significantly different from crabs from Picinguaba (pristine site) for the same tissue. and metal contamination (Araújo, 2014;Huynh Thi Tu et al, 2012;Cailleaud et al, 2007). The induction of MT under different salinity regimes rather than as a consequence of elevated metal concentrations is well known (Legras et al, 2000;Monserrat et al, 2008).…”