Frouin, Heloise; Lebeuf, Michel; Hammill, Mike et Fournier, Michel (2012). Transfer of PBDEs and chlorinated POPs from mother to pup during lactation in harp seals Phoca groenlandica Science of the Total Environment , vol. 417-418 . pp. 98-107. DOI: 10.1016/j.scitotenv.2011.11.084.
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Seven mother-pup pairs of harp seal (Phoca groenlandica) were sampled during the lactation season near Magdalen Islands, QC, Canada. The blubber and serum of pups and mothers as well as the milk of mothers were analyzed for polybrominated di-Ph ethers and several chlorinated persistent org. pollutants (POPs) to evaluate their transfer prior to weaning. Principal component anal. demonstrated significant variations in contaminant distribution patterns between seal tissues of mothers and pups. The selectivity in the transfer of POPs between mothers and pups appeared mainly driven by their log Kow (octanol/water partition coeff.). The most selective transfer step for the POPs examd. occurred between the blubber and the serum of the mother. A novel approach to examine temporal changes of POP concns. in tissues of seals which take into account the contamination of mothers was developed. A general decrease of POP concns. in pup tissues throughout lactation may suggest a growth diln. A concomitant rise of POP concns. was obsd. in maternal blubber and serum and in milk as lactation progresses. The intensive offloading of contaminants via lactation constitutes a major but selective excretory route for reproductive female seals and also a significant route of exposure for suckling pup seals.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Harp seals; PBDEs; PCBs; OCPs; Lactational transfer; Phoca groenlandica |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 07 mars 2024 19:57 |
| Dernière modification: | 07 mars 2024 19:57 |
| URI: | https://espace.inrs.ca/id/eprint/14026 |
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