METHYLSULFONE POLYCHLORINATED BIPHENYL AND 2,2-BIS(CHLOROPHENYL)-1,1-DICHLOROETHYLENE METABOLITES IN BELUGA WHALE (DELPHINAPTERUS LEUCAS) FROM THE ST. LAWRENCE RIVER ESTUARY AND WESTERN HUDSON BAY, CANADA

2000 ◽  
Vol 19 (5) ◽  
pp. 1378 ◽  
Author(s):  
Robert J. Letcher ◽  
Ross J. Norstrom ◽  
Derek C.G. Muir ◽  
Courtney D. Sandau ◽  
Krystyna Koczanski ◽  
...  
Keyword(s):  
Polychlorinated Biphenyl ◽  
River Estuary ◽  
Beluga Whale ◽  
Delphinapterus Leucas ◽  
Hudson Bay ◽  
Western Hudson Bay ◽  
Beluga Whale Delphinapterus Leucas ◽  
St Lawrence River

scholarly journals Beluga whale summer habitat associations in the Nelson River estuary, western Hudson Bay, Canada

PLoS ONE ◽  
2017 ◽  
Vol 12 (8) ◽  
pp. e0181045 ◽  
Author(s):  
Alexander J. Smith ◽  
Jeff W. Higdon ◽  
Pierre Richard ◽  
Jack Orr ◽  
Warren Bernhardt ◽  
...  
Keyword(s):  
River Estuary ◽  
Habitat Associations ◽  
Beluga Whale ◽  
Hudson Bay ◽  
Western Hudson Bay

Whale milk. I. Fin whale (Balaenoptera physalus) and beluga whale (Delphinapterus leucas) milk: gross composition and fatty acid constitution

1969 ◽  
Vol 47 (1) ◽  
pp. 95-97 ◽  
Author(s):  
B. H. Lauer ◽  
B. E. Baker
Keyword(s):  
Fatty Acid ◽  
North Atlantic ◽  
Beluga Whale ◽  
Delphinapterus Leucas ◽  
Hudson Bay ◽  
Balaenoptera Physalus ◽  
Fin Whale ◽  
The North ◽  
The North Atlantic ◽  
Beluga Whale Delphinapterus Leucas

Milk was obtained from a fin whale which was killed in the North Atlantic and from a beluga whale which was killed in Hudson Bay. The gross composition and fatty acid constitution of the milks were determined.

scholarly journals Inuit Knowledge of beluga whale (Delphinapterus leucas) foraging ecology in Nunavik (Arctic Quebec), Canada

2016 ◽  
Vol 94 (10) ◽  
pp. 713-726 ◽  
Author(s):  
K. Breton-Honeyman ◽  
M.O. Hammill ◽  
C.M. Furgal ◽  
B. Hickie
Keyword(s):  
Diet Composition ◽  
Foraging Ecology ◽  
Arctic Region ◽  
Beluga Whale ◽  
The Arctic ◽  
Delphinapterus Leucas ◽  
Hudson Bay ◽  
Productive Area ◽  
Inuit Knowledge ◽  
Beluga Whale Delphinapterus Leucas

The beluga whale (Delphinapterus leucas (Pallas, 1776)) is expected to be influenced by changes in the environment. In Nunavik, the Arctic region of Quebec, Nunavimmiut (Inuit of Nunavik) have depended on beluga for centuries, developing an extensive understanding of the species and its ecology. Forty semidirective interviews were conducted with Inuit hunters and Elders from four Nunavik communities, who had a range of 28–47 years of beluga hunting experience. Interviews followed an ethnocartographic format and were analyzed using a mixed methods approach. Hunters most commonly reported prey species from the sculpin (Cottidae), cod (Gadidae), salmon (Salmonidae), and crustacean families; regional variations in prey and in foraging habitat were found. Hunters identified significant changes in body condition (i.e., blubber thickness), which were associated with observations about the seasonality of feeding. The timing of fat accumulation in the late fall and winter coupled with the understanding that Hudson Bay is not known as a productive area suggest alternate hypotheses to feeding for the seasonal movements exhibited by these whales. Inuit Knowledge of beluga foraging ecology presented here provides information on diet composition and seasonality of energy intake of the beluga and can be an important component of monitoring diet composition for this species into the future. An Inuttitut version of the abstract is available ( Appendix A ).

A modelling-based perspective on the past, present, and future polychlorinated biphenyl contamination of the St. Lawrence beluga whale (Delphinapterus leucas) population

2000 ◽  
Vol 57 (S1) ◽  
pp. 101-112 ◽  
Author(s):  
Brendan E Hickie ◽  
Michael CS Kingsley ◽  
Peter V Hodson ◽  
Derek CG Muir ◽  
Pierre Béland ◽  
...  
Keyword(s):  
Polychlorinated Biphenyl ◽  
Sediment Cores ◽  
Reproductive Activity ◽  
Population Based ◽  
Beluga Whale ◽  
Delphinapterus Leucas ◽  
History Of ◽  
Beluga Whale Delphinapterus Leucas ◽  
American Eels ◽  
Good Agreement

Individual- and population-based models are presented that provide quantitative assessments of the accumulation of persistent organic pollutants over the lifetime of the beluga whale (Delphinapterus leucas) and consider all aspects of its life history. The models are used to examine the history of polychlorinated biphenyl (PCB) accumulation by the endangered St. Lawrence beluga population from 1950 to the present and to predict future trends based on likely contaminant loading scenarios. The hypothesis that migrating American eels (Anguilla rostrata) are a significant source of contaminants to the population is examined. The history of PCB exposure via the diet is reconstructed from existing data and from PCB profiles in dated sediment cores. The models adequately describe the effects of age, growth, sex, and reproductive activity on PCB concentrations in the beluga, and results show good agreement with observed concentrations when eels are included as 3% of the annual diet. PCB levels in the population appear to have peaked between 1967 and 1972. The model agrees with recent studies that have shown that PCB concentrations in the population are declining slowly.

scholarly journals Assessing spatial segregation of beluga whales (Delphinapterus leucas) in Western Hudson Bay estuaries

2021 ◽  
Author(s):  
Kristin H Westdal ◽  
Jeremy Davies ◽  
Steve Ferguson
Keyword(s):  
Environmental Data ◽  
Beluga Whale ◽  
Habitat Characteristics ◽  
Delphinapterus Leucas ◽  
Hudson Bay ◽  
Adult Males ◽  
Coastal Habitat ◽  
Age Classes ◽  
Age Class ◽  
Western Hudson Bay

Segregation of older adult males from females and immature males is known to occur in some beluga whale populations, but it is unclear if adults accompanied by calves segregate in Hudson Bay, where the largest summering population is found. Using imagery from a photographic aerial survey conducted in August 2015, we considered a number of environmental variables that might explain distribution by age class of beluga near two of three main estuaries (Churchill and Seal River) used by Western Hudson Bay belugas in the summer season. Belugas were identified and classified by age manually using an identification decision tree and GPS coordinates were plotted in ArcGIS.  Distribution by age class was examined in relation to distance to coastal habitat and bathymetry to test the predation risk hypothesis, sea surface temperature (thermal advantage hypothesis), and extent of river plume (forge-selection hypothesis). Habitat characteristics and the proportion of age classes in both estuaries were similar between age class groups (with and without calves) indicating no segregation and suggesting the environmental data assessed were not driving patterns of distribution and density of age classes at the spatial and temporal scale being investigated. Results provide a greaterunderstanding of spatial patterns of beluga whale habitat use in western Hudson Bay and information useful in conservation and management advice.

scholarly journals Amphritea ceti sp. nov., isolated from faeces of Beluga whale (Delphinapterus leucas)

2014 ◽  
Vol 64 (Pt_12) ◽  
pp. 4068-4072 ◽  
Author(s):  
Young-Ok Kim ◽  
Sooyeon Park ◽  
Doo Nam Kim ◽  
Bo-Hye Nam ◽  
Sung-Min Won ◽  
...  
Keyword(s):  
Phylogenetic Trees ◽  
Sequence Similarity ◽  
Beluga Whale ◽  
Delphinapterus Leucas ◽  
Rrna Gene ◽  
Phenotypic Properties ◽  
Content Type ◽  
Link Type ◽  
Beluga Whale Delphinapterus Leucas ◽  
Type Strains

A Gram-stain-negative, aerobic, non-spore-forming, non-flagellated and rod-shaped or ovoid bacterial strain, designated RA1T, was isolated from faeces collected from Beluga whale (Delphinapterus leucas) in Yeosu aquarium, South Korea. Strain RA1T grew optimally at 25 °C, at pH 7.0–8.0 and in the presence of 2.0 % (w/v) NaCl. Neighbour-joining, maximum-likelihood and maximum-parsimony phylogenetic trees based on 16S rRNA gene sequences revealed that strain RA1T joins the cluster comprising the type strains of three species of the genus Amphritea , with which it exhibited 95.8–96.0 % sequence similarity. Sequence similarities to the type strains of other recognized species were less than 94.3 %. Strain RA1T contained Q-8 as the predominant ubiquinone and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), C18 : 1ω7c and C16 : 0 as the major fatty acids. The major polar lipids of strain RA1T were phosphatidylethanolamine, phosphatidylglycerol, two unidentified lipids and one unidentified aminolipid. The DNA G+C content of strain RA1T was 47.4 mol%. The differential phenotypic properties, together with the phylogenetic distinctiveness, revealed that strain RA1T is separated from other species of the genus Amphritea . On the basis of the data presented, strain RA1T is considered to represent a novel species of the genus Amphritea , for which the name Amphritea ceti sp. nov. is proposed. The type strain is RA1T ( = KCTC 42154T = NBRC 110551T).

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