Mytilus edulis factors

Mytilus edulis) from the dissolved phase of seawater was predictable from the log of the bioconcentration factor and the log Kow of the congeners (Bergen et al. 1993). American oysters (Crassostrea virginica) from Galveston Bay, Texas, contained as much as 1100 pg/kg total PCBs DW soft parts, whereas conspecihcs from Tampa Bay, Florida, contained only 580 pg/kg DW soft parts most (54 to 94%) of the relative toxicity in both groups was due to PCBs 77,126, and 169 (Sericano et al. 1994). 

The bioconcentration factor (BCF) for chromium(VI) in rainbow trout (Salmo gairdneri) is 1. In bottom-feeder bivalves, such as the oyster (Crassostrea virginica), blue mussel (Mytilus edulis), and soft shell clam (Mya arenaria), the BCF values for chromium(III) and chromium(VI) may range from 86 to 192 (EPA 1980, 1984a Fishbein 1981 Schmidt and Andren 1984). The bioavailability of chromium(ni) to freshwater invertebrates (Daphnia pulex) decreased with the addition of humic acid (Ramelow et al. 

The mussels bioconcentrated ivermectin from water at 6.9 pg 1 for 6 days under semi-static conditions by a factor on a wet weight basis (BCF ) of 750 (confidence limits 720-790). The lipid content of Mytilus edulis is between 1 and 2 %. The bioconcentration factor an a lipid basis (BCFl) of ivermectin in mussels is therefore between 37,500 and 75,000. That means that the bioconcentration potential of ivermectin is very high and that ivermectin Bj and ivermectin Bib are able to cross membranes of gill-breathing organisms although the cross-section is much bigger than 9.5 A. 

The sponge accumulated copper in direct proportion to the concentration of the dissolved metal in the surroundings. Final body copper concentrations were 236 and 818 mg kg (dry weight) at exposure concentrations of 300 and 1000 tg dissolved Cu L respectively. There was no significant loss of copper during an 8-day depuration period. In the marine mussel Mytilus edulis, the presence of cadmium reduces the copper accumulation factor by 50% (Elliot et al. 1985). The accumulation of copper in gUl tissue of shore crabs Carcinus maenus) positively correlated with salinity. Increasing salinity reduces the accumulation of copper in ragworms (Hediste diversicolor), whereas the temperature enhances copper accumulation (Ozoh 1994). 

The most persistent nonionic surfactants are based on alkylphenol ethoxy-lates. These ethoxylates are only moderately accumulated by marine fauna. The bio concentration factors in common mussels Mytilus edulis) decreased from 350 to 50 from nonylphenol to nonylphenol tri-ethoxylate [150]. 

Van Kolck, M., M.A.J. Huijbregts, K. Vellman, and AJ. Hendriks. 2008. Estimating bioconcentration factors, lethal concentrations and critical body residues of metals in the mol-lusks Pema viridis and Mytilus edulis using ion characteristics. Environ. Toxicol. Chem. 27 272-276. 

Source Data from M. van Kolck, M.A.J. Huijbregts, K. Veltman, and A.J. Hendriks, Estimating Bioconcentration Factors, Lethal Concentrations and Critical Body Residues of Metals in the Mollusks Pema viridis and Mytilus edulis Using Ion Characteristics. Environ. Toxicol. Cliem. 27 (2008) 272-276. Supplementary information available at http //onlinelibrary.wiley.com/ store/10.1897/07-224R. 1/asset/supinfo/l 0.1897 07-224.S I.pdf v=l s=fda547dc5689332031 992621f5e3833819a8e96f. 

Van Kolck et al. (2008) developed 4 QSARs to predict the bioconcentration factors (BCF) of cations to the mussel Mytilus edulis, and 4 QSARs to predict the BCFs of cations to the mussel Perna viridis (Table 5.4). The BCFs for Mytilus edulis were developed for 8 cations and the QSARs with highest values were obtained using the ionic index (ZVr) and the covalent index (x i) (Table 5.18). The BCFs for Perna viridis were developed for 7 cations and the QSARs with highest values were obtained using the Pearson and Mawby softness parameter (Op) and the covalent index xit) (Table 5.18). 

---