Hepatic butyltin concentrations in beluga whales (Delphinapterus leucas) from the St Lawrence Estuary and northern Quebec, Canada

Butyltin (tributyltin TBT; dibutyltin DBT and monobutyltin MBT) speciation was measured in the liver of beluga whales from the St Lawrence Estuary and Hudson Strait (northern Quebec). Using GC–MS, liver samples were analysed from 21 beluga whales found dead, stranded along the shores of the St Lawrence during the period 1995–1998. In all cases, including a neonate specimen, the liver was contaminated with butyltin compounds with concentrations in the range 0.04–2.1 mg Sn kg−1 on a dry weight basis. Liver samples of five beluga whales from Hudson Strait obtained in the summer of 1998 were also analysed. For these animals, hepatic butyltin concentrations were consistently below the detection limit (<0.5 ng Sn g−1 for MBT and <0.2 ng Sn g−1 for DBT and TBT). Compared with published data on the contamination by TBT of the marine mammals of the St Lawrence in 1988, these contemporary results clearly indicate that the level of contamination of the beluga whales in this coastal marine ecosystem has not decreased ten years after regulating the use of TBT-based antifoulants on small craft. Copyright © 2000 John Wiley & Sons, Ltd.

[1]  Kurunthachalam Kannan,et al.  Butyltin residues in sediment, fish, fish-eating birds, harbour porpoise and human tissues from the Polish coast of the Baltic Sea , 1997 .

[2]  Carol Stewart,et al.  Vertical Distribution of Butyltin Residues in Sediments of British Columbia Harbours , 1997 .

[3]  P. Michel,et al.  Tributyltin analysis in seawater by GC FPD after direct aqueous‐phase ethylation using sodium tetrathylborate , 1991 .

[4]  D. Sergeant.  Biology of White Whales (Delphinapterus leucas) in Western Hudson Bay , 1973 .

[5]  H. Yamada,et al.  Organotin compounds and polychlorinated biphenyls of livers in squid collected from coastal waters and open oceans. , 1997, Environmental pollution.

[6]  Takahiko Mizuno,et al.  Butyltin Contamination in Marine Mammals from North Pacific and Asian Coastal Waters , 1998 .

[7]  Fan Yang,et al.  Occurrence of Organotin Compounds in the Canadian Aquatic Environment Five Years after the Regulation of Antifouling Uses of Tributyltin , 1997 .

[8]  J. Stephen,et al.  Tributyltin : case study of an environmental contaminant , 1996 .

[9]  Daniel Martineau,et al.  Toxic Compounds and Health and Reproductive Effects in St. Lawrence Beluga Whales , 1993 .

[10]  C. Metcalfe,et al.  Polychlorinated biphenyls and organochlorine compounds in brain, liver and muscle of beluga whales (Delphinapterus leucas) from the Arctic and St. Lawrence estuary , 1999 .

[11]  K. Fent,et al.  Ecotoxicology of organotin compounds. , 1996, Critical reviews in toxicology.

[12]  E. Goldberg.  TBT: An Environmental Dilemma , 1986 .

[13]  R. Saint-Louis,et al.  Le Tributyletain et Ses Produits de Degradation Dans L'Estuaire du Saint-Laurent (Canada) Tributyltin and Its Degradation Products in the St Lawrence Estuary (Canada) , 1997 .

[14]  Émilien Pelletier,et al.  Environmental tributyltin research : Past, present, future , 1997 .

[15]  S. Tanabe,et al.  Bioaccumulation of Butyltin Compounds in Marine Mammals: The Specific Tissue Distribution and Composition , 1997 .

[16]  S. Tanabe,et al.  Accumulation of Butyltin Compounds in Risso's Dolphin (Grampus griseus) from the Pacific Coast of Japan: Comparison with Organochlorine Residue Pattern , 1996 .

[17]  R. Maguire,et al.  Occurrence of butyltin compounds in beluga whales (Delphinapterus leucas) , 1998 .

[18]  Shin Takahashi,et al.  Elevated Accumulation of Tributyltin and Its Breakdown Products in Bottlenose Dolphins (Tursiops truncatus) Found Stranded along the U.S. Atlantic and Gulf Coasts , 1997 .

[19]  I. Davies,et al.  Tributyltin inputs to the North Sea from shipping activities, and potential risk of biological effects , 1998 .