A review of the genetic relationships of Atlantic walrus ( Odobenus rosmarus rosmarus ) east and west of Greenland

Polar Biology ◽  
2001 ◽  
Vol 24 (10) ◽  
pp. 713-718 ◽  
Author(s):  
Born E. ◽  
Andersen L. ◽  
Gjertz I. ◽  
Wiig Ø.
Keyword(s):  
Genetic Relationships ◽  
Odobenus Rosmarus ◽  
East And West ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

A TRITIATED WATER EXPERIMENT ON A MALE ATLANTIC WALRUS (ODOBENUS ROSMARUS ROSMARUS)

1992 ◽  
Vol 8 (4) ◽  
pp. 418-420 ◽  
Author(s):  
Christian Lydersen ◽  
David Griffiths ◽  
Ian Gjertz ◽  
Oystein Wiig
Keyword(s):  
Tritiated Water ◽  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Summer foods of Atlantic walrus, Odobenus rosmarus rosmarus, in northern Foxe Basin, Northwest Territories

1997 ◽  
Vol 75 (7) ◽  
pp. 1166-1175 ◽  
Author(s):  
K. I. Fisher ◽  
R. E. A. Stewart
Keyword(s):  
Benthic Invertebrates ◽  
Stomach Contents ◽  
Male And Female ◽  
Foxe Basin ◽  
Important Prey ◽  
Odobenus Rosmarus ◽  
Serripes Groenlandicus ◽  
Gross Energy ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Stomach contents of Atlantic walrus, Odobenus rosmarus rosmarus, taken by Inuit hunters in northern Foxe Basin in July 1987 and 1988 (n = 105) and September 1988 (n = 2) were examined. In July, 20 of 94 stomachs from immature and adult walrus contained > 5 g of food representing 17 prey taxa, including bivalves, gastropods, holothurians, polychaetes, and brachiopods. The bivalve Mya truncata contributed 81.4% of the total gross energy in the diet, with the bivalve Hiatella arctica, holothurians, and the polychaete Nereis sp. contributing 7.5, 3.5, and 2.8%, respectively. The diets of male and female walrus were similar except that females received a significantly (P < 0.05) greater percentage of gross energy in their diet from H. arctica than did males. Walrus less than 3 years old (n = 11) consumed mostly milk, although some benthic invertebrates were eaten. Analysis of the contents of two stomachs collected in September suggested that walrus may feed more intensively in the fall. Mya truncata was again the predominant prey, contributing 59.9% of total gross energy, with the bivalve Serripes groenlandicus (37.9%) replacing H. arctica (0.3%) as the second most important prey.

scholarly journals Integrated study of benthic foraging resources for Atlantic walrus ( Odobenus rosmarus rosmarus ) in the Pechora Sea, south‐eastern Barents Sea

2020 ◽  
Author(s):  
Anna Gebruk ◽  
Polina Mikhaylyukova ◽  
Maria Mardashova ◽  
Varvara Semenova ◽  
Lea‐Anne Henry ◽  
...  
Keyword(s):  
Barents Sea ◽  
South Eastern ◽  
Odobenus Rosmarus ◽  
Integrated Study ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Historical sex-specific distribution of Atlantic walrus (Odobenus rosmarus rosmarus) in Svalbard assessed by mandible measurements

Polar Biology ◽  
2007 ◽  
Vol 31 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Øystein Wiig ◽  
Erik W. Born ◽  
Ian Gjertz ◽  
Christian Lydersen ◽  
Robert E. A. Stewart
Keyword(s):  
Odobenus Rosmarus ◽  
Specific Distribution ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

COMPARISON OF BETWEEN-TOOTH AGE ESTIMATES OF ATLANTIC WALRUS (ODOBENUS ROSMARUS ROSMARUS)

2005 ◽  
Vol 21 (2) ◽  
pp. 346-354 ◽  
Author(s):  
Robert E. A. Stewart ◽  
Barbara E. Stewart
Keyword(s):  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus ◽  
Age Estimates

Status of the Atlantic walrus Odobenus rosmarus rosmarus in the Svalbard area

1984 ◽  
Vol 2 (1) ◽  
pp. 27-45 ◽  
Author(s):  
ERIK W. BORN
Keyword(s):  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Comparison of mandibular with cemental growth-layer counts for ageing Atlantic walrus (Odobenus rosmarus rosmarus)

1993 ◽  
Vol 71 (1) ◽  
pp. 163-167 ◽  
Author(s):  
J. L. Garlich-Miller ◽  
R. E. A. Stewart ◽  
B. E. Stewart ◽  
E. A. Hiltz
Keyword(s):  
Growth Rate ◽  
Growth Layer ◽  
Mandibular Growth ◽  
Odobenus Rosmarus ◽  
Main Factors ◽  
The Relationship ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus ◽  
Age Estimates

The relationship between the numbers of growth layers counted in the mandible and in the cementum of lower canines from 87 walrus (Odobenus rosmarus rosmarus) was examined. A 1:1 correlation between counts of growth layers in the two tissues was found in males ≤ 19 years old and females ≤ 9 years old. No correlation was found in males with ≥ 21 or in females with ≥ 10 cemental growth layers. In physically mature walrus, mandibular layering was unreliable for age analysis. Resorption and a reduced mandibular growth rate appear to be the main factors limiting mandibular age estimates in mature walrus.

scholarly journals Status of the Atlantic walrus Odobenus rosmarus rosmarus in the Svalbard area

1984 ◽  
Vol 2 (1) ◽  
pp. 27-45 ◽  
Author(s):  
Erik W. Born
Keyword(s):  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Stock discrimination of Atlantic walrus (Odobenus rosmarus rosmarus) in the eastern Canadian Arctic using lead isotope and element signatures in teeth

1999 ◽  
Vol 56 (1) ◽  
pp. 105-112 ◽  
Author(s):  
P M Outridge ◽  
R EA Stewart
Keyword(s):  
Canadian Arctic ◽  
Isotope Ratios ◽  
High Arctic ◽  
Trace Element Composition ◽  
Pb Isotope ◽  
Foxe Basin ◽  
Stock Discrimination ◽  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus

Atlantic walrus (Odobenus rosmarus rosmarus) harvested from three regions of the Canadian Arctic, and by different communities within two of those regions, were distinguished using the stable Pb isotope or trace element composition of their tooth cementum. Walrus from Foxe Basin (Igloolik, Hall Beach), the High Arctic (Grise Fiord, Resolute Bay), and eastern Hudson Bay (Akulivik, Inukjuak) were each characterized by specific combinations of Pb isotope ratios and Co concentrations, and we conclude that they represent different regional stocks. Walrus landed at Akulivik and Inukjuak were further discriminated by significant differences in 208Pb/207Pb, even though the communities are only 250 km apart. There was more overlap between walrus from Igloolik and Hall Beach, which are 80 km apart, but significant differences between sites in Pb isotope ratios and in concentrations of V, Zn, and Mo suggested that more than one Foxe Basin stock was being harvested. Particularly at Hall Beach, the herds contained a few individuals with isotope ratios significantly different from the rest of the population. These "outliers" may represent either immigrants from other geological provinces or animals caught in other areas. Further investigation of the outliers could provide information regarding hunting patterns, walrus home ranges, and the rates and demographics of interstock migrations.

Diving patterns of an Atlantic walrus Odobenus rosmarus rosmarus near Svalbard

Polar Biology ◽  
1993 ◽  
Vol 13 (1) ◽  
Author(s):  
�ystein Wiig ◽  
Ian Gjertz ◽  
David Griffiths ◽  
Christian Lydersen
Keyword(s):  
Odobenus Rosmarus ◽  
Odobenus Rosmarus Rosmarus ◽  
Atlantic Walrus
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