Heavy Metals in the Blue Crab (Callinectes sapidus) in Mersin Bay, Turkey

Abstract

The concentrations of four metals (copper, cadmium, zinc and lead) were quantified in blue crabs (Callinectes sapidus) tissues collected in January, April, June and September at two stations in Mersin Bay, northeastern Mediterranean Sea, using ICP-MS. The metal concentrations in crabs from the two stations differed significantly. The hepatopancreas was the major organ accumulating metals, followed by gill and muscle tissues. Except for lead, the highest concentrations of metals were measured in the hepatopancreas. The hepatopancreas had higher concentrations of all heavy metals (Cu 321.1 ± 4.30; Zn 182.2 ± 3.40; Cd 48.2 ± 2.00) compared to gill (Cu 90.2 ± 1.35; Zn 104.3 ± 2.30; Cd 22.3 ± 3.40) and muscle (Cu 19.1 ± 1.10; Zn 55.1 ± 3.25; Cd 2.5 ± 0.20). Among the metals analyzed, Cu, Zn and Pb were the most abundant in the different tissues while Cd was the least abundant in C. sapidus. Seasonality in the levels of the four metals was determined.The highest concentrations of all metals were observed in the June (Zn 55.1 ± 3.25; Cu 19.1 ± 1.10; Cd 2.5 ± 0.20; Pb 5.1 ± 0.18) compared to all other months (Zn 34.1 ± 3.23; Cu 11.1 ± 1.15; Cd 0.9 ± 0.20; Pb 3.1 ± 0.21).

Wasted Biomaterials from Crustaceans as a Compliant Natural Product Regarding Microbiological, Antibacterial Properties and Heavy Metal Content for Reuse in Blue Bioeconomy: A Preliminary Study

“…Thus, we conclude the accidental accumulation of heavy metals related to the heavy metals pollution of the crabs’ habitat. An important consideration is that the shell contamination with particular metals strongly depends on the type of local environmental pollution from industrial effluent [ 22 , 23 ]. Similar, or slightly lower range of Fe, Cu, Pb, and Cd content than in the present study, was reported by Abdel-Salam [ 24 ] in the shell of several crab species, who suggested that the shells of respective species originating from Egyptian and Saudi Arabia coasts are suitable for use as mineral supplements for animal feed.…”

A Systematic Review on Metal Dynamics and Marine Toxicity Risk Assessment Using Crustaceans as Bioindicators

“…The data indicate that, in most cases, crabs present higher values than other animals, and that crustaceans in general display higher values compared to other animals. Regarding bioaccumulation, the hepatopancreas is the main target organ for metals, playing an essential role in metal detoxification, mainly through metallothionein detoxification animal [18,50,82]. In addition to dietary ingestion, the gills are also an important gateway for metal accumulation, participating in their biological absorption and transformation.…”

“…Exploring the potential bioindicator of crustaceans then becomes a differential in the face of the numerous studies that address other species. In general, most toxic metals accumulate in crustacean hepatopancreas [18] and gills [19]. The hepatopancreas is the main bioaccumulator organ, due to its xenobiotic detoxification function [10,20], while gills capture and accumulate metals through water due to high a contact surface and thin epithelium [11].…”

Níveis de elementos-traço em organismos marinhos utilizados para consumo humano

“…Os elementos metálicos são considerados importantes contaminantes dos ecossistemas aquáticos em função de sua toxicidade, alta persistência, não degradabilidade e tendência para bioacumular nos organismos e para biomagnificar ao longo da cadeia alimentar (ÇOĞUN et al, 2017). Fatores físico-quimicos como pH, salinidade, tam anho das partículas de sedimento e teor de matéria orgânica atuam nos processos responsáveis pela especiação e biodisponibilidade dos metais para a biota (HATJE et al, 2003;PINDER et al, 2005).…”

“…quimica entre os íons metálicos e o material em suspensão. Como resultado, os organismos bentônicos e aqueles se alimentam no sedimento tendem a apresentar maiores concentrações de metais em seus tecidos do que os organismos pelágicos (ÇOĞUN et al, 2017; TAKARINA; ADIWIBOWO, 2011).…”