Polychlorinated biphenyls and organochlorine compounds in brain, liver and muscle of beluga whales (Delphinapterus leucas) from the Arctic and St. Lawrence estuary

1999 ◽  
Vol 47 (1) ◽  
pp. 1-15 ◽  
Author(s):  
C Metcalfe ◽  
T Metcalfe ◽  
S Ray ◽  
G Paterson ◽  
B Koenig
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Compounds ◽  
The Arctic ◽  
Delphinapterus Leucas ◽  
Lawrence Estuary ◽  
Beluga Whales ◽  
St Lawrence Estuary

CYP1A localization in Beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary and the Arctic

2000 ◽  
Vol 50 (1-5) ◽  
pp. 67 ◽  
Author(s):  
J.Y. Wilson ◽  
S.R. Cooke ◽  
M.M. Moore ◽  
D. Martineau ◽  
I. Mikaelian ◽  
...  
Keyword(s):  
The Arctic ◽  
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

Helminths of an endangered population of belugas, Delphinapterus leucas, in the St. Lawrence estuary, Canada

1995 ◽  
Vol 73 (8) ◽  
pp. 1402-1409 ◽  
Author(s):  
L. N. Measures ◽  
P. Béland ◽  
D. Martineau ◽  
S. De Guise
Keyword(s):  
Host Record ◽  
Anisakis Simplex ◽  
Morbidity And Mortality ◽  
The Arctic ◽  
Delphinapterus Leucas ◽  
New Host ◽  
Lawrence Estuary ◽  
New Host Record ◽  
Endangered Population ◽  
St Lawrence Estuary

Helminths were identified in 38 belugas, Delphinapterus leucas, stranded in the St. Lawrence estuary and Gulf of St. Lawrence during 1984–1993. These helminth species were Anisakis simplex, Contracaecinea sp., Pseudoterranova sp., Stenurus arctomarinus, Pharurus pallasii, Halocercus taurica (new host record), Halocercus monoceris (new host record), Hadwenius seymouri, Diphyllobothrium sp., and Bolbosoma sp. (new host record). Of 21 helminths previously reported from populations of belugas worldwide, 7 were found in the St. Lawrence population. Lungworms, such as Halocercus monoceris, may prove useful in identification of beluga populations in the Arctic and may also be an important cause of morbidity and mortality of calves.

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