Relationships between vitamin A and PCBs in grey seal mothers and pups during lactation

Marie Vanden Berghe, Audrey Mat, Aline Arriola, Stephanie Polain, Valerie Stekke, Jean-Pierre Thome, Frederic Gaspart, Patrick Pomeroy, Yvan Larondelle, Cathy Debier

Research output: Contribution to journalArticlepeer-review

Abstract

A previous study has shown a simultaneous increase of vitamin A and PCBs in grey seal (Halichoerus grypus) milk at late lactation (Debier et al., 2004). Here we sought to understand this unexpected relationship by comparing the dynamics of vitamin A and PCBs in the different tissue compartments of transfer. Lactating grey seals and their pups were sampled longitudinally in Scotland during the 2006 breeding season. As blubber reserves decreased, concentrations of vitamin A and PCBs increased during lactation in the inner layer of maternal blubber. A concomitant rise was observed in milk and consequently in the serum of suckling pups. The similar dynamics of vitamin A and PCBs in milk and inner blubber suggest a common mechanism of mobilisation from maternal body stores and transfer into the milk. A panel data analysis highlighted a negative impact of PCBs in milk and pup serum on vitamin A status in pup serum. (C) 2009 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1570-1575
Number of pages6
JournalEnvironmental Pollution
Volume158
Issue number5
DOIs
Publication statusPublished - May 2010

Keywords

  • Grey seal
  • Lactation
  • Vitamin A
  • PCBs
  • Blubber
  • BLUBBER FATTY-ACIDS
  • HALICHOERUS-GRYPUS
  • PHOCA-VITULINA
  • POLYCHLORINATED-BIPHENYLS
  • VERTICAL STRATIFICATION
  • ADIPOSE-TISSUE
  • MARINE MAMMALS
  • WEDDELL SEALS
  • RINGED SEALS
  • MOBILIZATION

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