Levels and profiles of organochlorines and brominated flame retardants in female blue tits (**Cyanistes caeruleus**) and their eggs
Faculty of Sciences. Biology
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences. Pharmacy
Organohalogen compounds / European Group for Organizational Studies. - Berlin
, p. 1329-1332
University of Antwerp
Maternal transfer of organohalogenated pollutants (OHPs) was investigated through comparisons of the levels and profiles of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) between female blue tits (Cyanistes caeruleus) and their eggs. Mean egg concentrations decreased significantly in relation to the laying order from 342 ± 24 ng/g lw to 235 ± 17 ng/g lw for the sum OCPs, from 1623 ± 148 ng/g lw to 1040 ± 47 ng/g lw for the sum PCBs and from 49 ± 5 ng/g lw to 27 ± 5 ng/g lw for the sum PBDEs. The egg/female lipid concentration ratios for the sum OCPs, sum PCBs and sum PBDEs decreased significantly in function of the laying order from 1.1 ± 0.1 to 0.7 ± 0.02, 1.0 ± 0.09 to 0.7 ± 0.003 and 1.2 ± 0.14 to 0.8 ± 0.05, respectively. Furthermore, our results suggest that maternal transfer in blue tits seems to be selective for the more bioaccumulative and persistent congeners/compounds. Differences in reproductive strategies among species are suggested to be important in the processes of maternal transfer of OHPs.