Eggs, PCB concentration

In loggerhead turtles (Caretta caretta), PCB concentrations in the chorioallantoic membrane correlate closely with whole-egg PCB concentrations (Cobb and Wood 1997). The authors recommend the use of chorioallantoic membrane tissues as a nonlethal methodology for predicting PCB concentrations in sea turtle hatchlings. 

Stow CA. 1995b. Great Lakes herring gull egg PCB concentrations indicate approximate steady-state conditions. Environ Sci Technol 29(ll) 2893-2897. 

Eggs, chinook salmon, Oncorhynchus tshawytschar, 1986 29-514 FW correlated with total PCB concentrations but not correlated to egg or fry mortality 23... 

Commercial PCB mixtures frequently contain impurities that may contribute to the 2,3,7,8-TCDD toxic equivalency factor. These impurities may include other PCBs, dioxins, dibenzofurans, naphthalenes, diphenyl ethers and toluenes, phenoxy and biphenyl anisoles, xanthenes, xanthones, anthracenes, and fluorenes (Jones etal. 1993). PCB concentrations in avian tissues sometimes correlate positively with DDE concentrations (Mora et al. 1993). Eggs of peregrine falcons (Falco peregrinus) from California, for example, contained measurable quantities of various organochlorine compounds, including dioxins, dibenzofurans, mirex, hexachlorobenzene, and / ,//-DDE at 7.1 to 26.0 mg/kg FW PCB 126 accounted for 83% of the 2,3,7,8-TCDD equivalents, but its interaction with other detectable organochlorine compounds is largely unknown (Jarman et al. 1993). 

Cobb, G.P. and P.D. Wood. 1997. PCB concentrations in eggs and chorioallantoic membranes of loggerhead sea turtles (Caretta caretta) from the Cape Romain National Wildlife Refuge. Chemosphere 34 539-549. 

---