An environmental forensic approach for tropical estuaries based on metal bioaccumulation in tissues of Callinectes danae

Abstract

The blue crab Callinectes danae is distributed throughout the Atlantic coast and this study aimed to evaluate a environmental forensics approach that could be applied at tropical estuarine systems where this species is distributed, based on the metal concentrations in its tissues. For this purpose, blue crab samples were collected in 9 sites (distributed in 3 areas) along the Santos Estuarine System, state of São Paulo, Brazil. The concentrations of Al, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn were determined in gills, hepatopancreas and muscle tissues. Sediment samples were collected and analyzed in these same sites. A data distribution pattern was identified during both sampling periods (August and December 2011). In order to validate this model, a new sampling campaign was performed in March 2013 at the Santos Estuarine System and also at Ilha Grande (state of Rio de Janeiro). These data were added to the previous database (composed of the August and December 2011 samples) and a discriminant analysis was applied. The results confirmed an environmental fingerprint for the Santos Estuarine System.

Implications on the Pb bioaccumulation and metallothionein levels due to dietary and waterborne exposures: The Callinectes danae case

“…According to Rainbow (1988) and Bordon et al (2016), metals absorbed by gills and/or the epidermis can only be proportionally transferred to muscle tissue if in excess, depending on the pattern of accumulation of each species and chemical properties of the considered element. Thus, metals absorbed by gills should not be directly and proportionally transferred to muscle tissue.…”

“…Few previous studies have assessed metal concentrations in C. danae tissues for biomonitoring purposes (Virga et al, 2007;Virga and Geraldo, 2008;Bordon et al, 2016); some have reported that different metals may present different target tissues and bioaccumulate differently in distinct tissues (Bordon et al 2012b;Lavradas et al, 2014). The combination of the uptake and depuration processes of each tissue and in the whole organism would lead to the following processes: metals can be efficiently excreted, can accumulate in immobilized form, or can remain active in the tissue and lead to deleterious effects in the animals (Rainbow, 1988(Rainbow, , 1998(Rainbow, , 2007(Rainbow, , 2002.…”

“…Based on results reported by Bordon et al (2012a,b) and Bordon et al (2016), two main hypotheses were assumed for Pb accumulation in C. danae: 1-Pb bioaccumulation may occur in different concentrations according to the type of tissue; and 2the uptake pathway (i.e., direct water contact or feeding) interferes directly on bioaccumulation in each tissue.…”

Dredging Activities Carried Out in a Brazilian Estuary Affect Mercury Levels in Swimming Crabs

“…They are benthic organisms that live in close contact with potentially contaminated sediments and are, therefore, considered important contamination bioindicators [4,6,14]. Studies around the world that evaluate the concentration of mercury in swimming crabs that inhabit estuaries indicate average values between 0.035 mg kg −1 and 0.496 mg kg −1 [5,6,[20][21][22][23][24][25][26].…”

Caracterização cinética e molecular da (Na>sup<+>/sup<, K>sup<+>/sup<)-ATPase do tecido branquial de >i<Callinectes danae>/i< submetido a estresse por cobalto

“…Callinectes danae é uma das várias espécies de caranguejos recomendadas como biomonitor ambiental, capaz de fornecer respostas biológicas em áreas contaminadas (Bordon et al 2012(Bordon et al , 2015. A sobrevivência desses invertebrados depende da qualidade ambiental do estuário, sendo assim, as concentrações de metais nos tecidos dos siris-azuis devem ser monitoradas, já que esta espécie é um recurso pesqueiro importante nas comunidades locais (Severino-Rodrigues et al 2001).…”