Levels and Temporal Trends of Toxaphene Congeners in Beluga Whales (Delphinapterus leucas) from the St. Lawrence Estuary, Canada

2003 ◽  
Vol 37 (20) ◽  
pp. 4603-4609 ◽  
Author(s):  
Bruno Gouteux ◽  
Michel Lebeuf ◽  
Derek C. G. Muir ◽  
Jean-Pierre Gagné
Keyword(s):  
Temporal Trends ◽  
Delphinapterus Leucas ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
St Lawrence Estuary

scholarly journals Tumors in St. Lawrence Beluga Whales (Delphinapterus leucas)

1994 ◽  
Vol 31 (4) ◽  
pp. 444-449 ◽  
Author(s):  
S. De Guise ◽  
A. Lagacé ◽  
P. Béland
Keyword(s):  
Small Population ◽  
Delphinapterus Leucas ◽  
Carcinogenic Effect ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
High Prevalence ◽  
Endangered Population ◽  
High Concentrations ◽  
St Lawrence Estuary ◽  
St Lawrence River

A population of 450–500 belugas ( Delphinapterus leucas) resides in the polluted estuary of the St. Lawrence River. Stranded carcasses of this endangered population were recovered and necropsied. High concentrations of organochlorines, heavy metals, and benzo-a-pyrene exposure were demonstrated in tissues of these whales. Between 1988 and 1990, 21 tumors were found in 12 out of 24 carcasses. Among these tumors, six were malignant and 15 were benign. The animals were between 1.5 and >29 years of age, and the ages of animals with and without tumors did not differ when two juvenile animals (1.5 and 3.5 years of age) were excluded. Seven other neoplasms had been reported previously in six out of 21 well-preserved carcasses examined in the same laboratory between 1982 and 1987. Overall, 28 of the 75 confirmed tumors reported so far in cetaceans (37%) were from this small population of beluga whales in the St. Lawrence Estuary. Such a high prevalence of tumors would suggest an influence of contaminants through a direct carcinogenic effect and/or a decreased resistance to the development of tumors in this population.

Pathology of stranded beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary, Québec, Canada

1988 ◽  
Vol 98 (3) ◽  
pp. 287-310 ◽  
Author(s):  
D. Martineau ◽  
A. Lagacé ◽  
P. Béland ◽  
R. Higgins ◽  
D. Armstrong ◽  
...  
Keyword(s):  
Delphinapterus Leucas ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
St Lawrence Estuary

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

2000 ◽  
Vol 14 (4) ◽  
pp. 218-226 ◽  
Author(s):  
Richard St-Louis ◽  
Stephen de Mora ◽  
�milien Pelletier ◽  
Bill Doidge ◽  
Daniel Leclair ◽  
...  
Keyword(s):  
Delphinapterus Leucas ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
St Lawrence Estuary

Dermatophilus -like infection in beluga whales, Delphinapterus leucas , from the St. Lawrence estuary

2001 ◽  
Vol 12 (1) ◽  
pp. 59-62 ◽  
Author(s):  
I. Mikaelian ◽  
J.-M. Lapointe ◽  
P. Labelle ◽  
R. Higgins ◽  
M. Paradis ◽  
...  
Keyword(s):  
Delphinapterus Leucas ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
St Lawrence Estuary
Sign in / Sign up

Export Citation Format

Share Document