Trace elements in tissues of phocid seals harvested in the Alaskan and Canadian Arctic: influence of age and feeding ecology

2005 ◽  
Vol 83 (5) ◽  
pp. 726-746 ◽  
Author(s):  
Larissa-A Dehn ◽  
Gay G Sheffield ◽  
Erich H Follmann ◽  
Lawrence K Duffy ◽  
Dana L Thomas ◽  
...  
Keyword(s):  
Trace Elements ◽  
Molar Ratio ◽  
Decay Function ◽  
Phoca Largha ◽  
Ringed Seals ◽  
Opposite Trend ◽  
Slow Decline ◽  
Phocid Seals ◽  
Pusa Hispida ◽  
Bearded Seals

Concentrations of selected trace elements (Ag, Cu, Cd, Se, Zn, THg, and MeHg) were measured in tissues of subsistence-harvested ringed (Pusa hispida (Schreber, 1775)), bearded (Erignathus barbatus (Erxleben, 1777)), and spotted (Phoca largha Pallas, 1811) seals from Alaska and ringed seals from Canada. Most variables differed significantly in tissues of phocids analyzed. Concentration of renal Cd was highest in ringed seals from Canada and bearded seals from Alaska, while spotted seals had the lowest concentrations. Concentrations of Cd increased with age to a maximum in ringed and bearded seals, followed by a slow decline with increasing age. Spotted seals had the highest proportion of MeHg to THg (%MeHg) in liver and bearded seals the lowest ratio. THg in seal tissues followed the opposite trend. %MeHg in ringed and bearded seals followed a hyperbolic decay function with age, but was highly variable in spotted seals. Seals with lesions had a higher relative occurrence of MeHg in liver. The molar ratio of Se:THg in liver exceeded 1:1 in most seals and was negatively correlated with age in ringed and spotted seals. Hepatic Ag was higher in bearded seals than in ringed and spotted seals. A correlation of Ag with age was not documented.

scholarly journals FIRST INSTRUMENTAL AERIAL SURVEY OF RINGED SEALS (PUSA HISPIDA) AND BEARDED SEALS (ERIGNATHUS BARBATUS) IN THE RUSSIAN ZONE OF THE CHUKCHI AND EAST-SIBERIAN SEAS IN SPRING 2016

2019 ◽  
Vol 199 ◽  
pp. 152-162
Author(s):  
V. I. Chernook ◽  
I. S. Trukhanova ◽  
A. N. Vasiliev ◽  
D. I. Litovka ◽  
D. M. Glazov ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Chukchi Sea ◽  
Aircraft Engine ◽  
Aerial Survey ◽  
Ringed Seals ◽  
East Siberian Sea ◽  
Pusa Hispida ◽  
Abundance And Distribution ◽  
Different Parts ◽  
Bearded Seals

An instrumental aerial survey was conducted in the Russian part of the Chukchi Sea and the eastern East-Siberian Sea in the spring of 2016 to investigate new technical capabilities for estimating abundance and distribution of ringed and bearded seals on the spring ice. Density of both species decreased with distance to the mainland; the largest concentrations of ringed seals were detected in coastal waters, including the Koluchinskaya and Chaunskaya Bays. Taking into account the portion of seals in the water (on average 32 %) and the portion of seals that were disturbed by the aircraft engine noise and dove (on average 30.2 % of ringed seals and 5.9 % of bearded seals), the number of ringed seals in the surveyed area was estimated as 50,839 (СI 95 %: 25,400–73,859; CV = 23.8 %), and the number of bearded seals as 14,590 (CI 95 %: 6,404–24,560; CV = 31.1 %). These estimates are considered to be biased low, primarily due to asynchronic collapse of the ringed seal snow lairs in different parts of the surveyed area, which caused a highly variable detection probability of this species that was difficult to account for.

Underwater hearing sensitivity of two ringed seals (Pusa hispida)

1975 ◽  
Vol 53 (3) ◽  
pp. 227-231 ◽  
Author(s):  
J. M. Terhune ◽  
K. Ronald
Keyword(s):  
Frequency Range ◽  
Hearing Sensitivity ◽  
Ringed Seals ◽  
Phocid Seals ◽  
Pusa Hispida ◽  
Underwater Hearing

Minimum audible field, underwater audiograms from 1 to 90 kHz were obtained for two ringed seals (Pusa hispida). The audiograms exhibited a uniform sensitivity, to within ± 7 dB, in the frequency range 1 to 45 kHz. Above 45 kHz the threshold increased at a rate of 60 dB per octave. The lowest threshold was −32 dB relative to 1 μbar (68 dB re 1 μPa) at 16 kHz. The audiograms were similar to those of other phocid seals so far studied.

Distribution and abundance of ringed (Phoca hispida) and bearded seals (Erignathus barbatus) in western Hudson Bay

1997 ◽  
Vol 54 (4) ◽  
pp. 914-921 ◽  
Author(s):  
N J Lunn ◽  
I Stirling ◽  
S N Nowicki
Keyword(s):  
Polar Bear ◽  
Hudson Bay ◽  
Phoca Hispida ◽  
Current Estimate ◽  
Ringed Seals ◽  
Erignathus Barbatus ◽  
The Mean ◽  
Western Hudson Bay ◽  
The Relationship ◽  
Bearded Seals

We flew a medium-altitude, systematic, strip-transect survey for ringed (Phoca hispida) and bearded seals (Erignathus barbatus) over western Hudson Bay in early June 1994 and 1995. The mean density (per square kilometre) of ringed seals hauled out on the ice was four times higher in 1995 (1.690) than in 1994 (0.380). The 1994 survey appeared to underestimate seal abundance because it was flown too late. Ringed seals preferred high ice cover habitat (6 + /8 ice) and, within this habitat, favoured cracking ice and large floes. We found no consistent effect of either wind or cloud cover on habitat preference. We estimated a total of 1980 bearded seals and 140<|>880 ringed seals hauled out on the sea ice in June 1995. A recent review of the relationship between ringed seal and polar bear (Ursus maritimus) populations suggests that a visible population of this size should support a population of up to 1300 polar bears, which is in general agreement with the current estimate of 1250-1300 bears in western Hudson Bay.

Seasonal habitat use of a lagoon by ringed seals Pusa hispida in Svalbard, Norway

2021 ◽  
Author(s):  
J Vacquié-Garcia ◽  
C Lydersen ◽  
E Lydersen ◽  
GN Christensen ◽  
C Guinet ◽  
...  
Keyword(s):  
Habitat Use ◽  
Ringed Seals ◽  
Pusa Hispida ◽  
Seasonal Habitat Use

Antioxidative defense and oxidative stress in ringed seals (Pusa hispida) from differently polluted areas

2012 ◽  
Vol 114-115 ◽  
pp. 67-72 ◽  
Author(s):  
Mirella Kanerva ◽  
Heli Routti ◽  
Yael Tamuz ◽  
Madeleine Nyman ◽  
Mikko Nikinmaa
Keyword(s):  
Oxidative Stress ◽  
Antioxidative Defense ◽  
Ringed Seals ◽  
Pusa Hispida ◽  
And Oxidative Stress

scholarly journals Immunomodulatory effects of exposure to polychlorinated biphenyls and perfluoroalkyl acids in East Greenland ringed seals (Pusa hispida)

2016 ◽  
Vol 151 ◽  
pp. 244-250 ◽  
Author(s):  
Milton Levin ◽  
Erika Gebhard ◽  
Lindsay Jasperse ◽  
Jean-Pierre Desforges ◽  
Rune Dietz ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Perfluoroalkyl Acids ◽  
Immunomodulatory Effects ◽  
East Greenland ◽  
Ringed Seals ◽  
Pusa Hispida

Giardia duodenalis and Cryptosporidium Spp. in the Intestinal Contents of Ringed Seals (Phoca hispida) and Bearded Seals (Erignathus barbatus) in Nunavik, Quebec, Canada

2008 ◽  
Vol 94 (5) ◽  
pp. 1161-1163 ◽  
Author(s):  
Brent R. Dixon ◽  
Lorna J. Parrington ◽  
Monique Parenteau ◽  
Daniel Leclair ◽  
Mónica Santín ◽  
...  
Keyword(s):  
Giardia Duodenalis ◽  
Phoca Hispida ◽  
Cryptosporidium Spp ◽  
Ringed Seals ◽  
Erignathus Barbatus ◽  
Intestinal Contents ◽  
Bearded Seals

scholarly journals Serum Haptoglobin Concentrations in Ringed Seals (Pusa hispida) from Svalbard, Norway

2006 ◽  
Vol 42 (2) ◽  
pp. 442-446 ◽  
Author(s):  
Bjørn A. Krafft ◽  
Christian Lydersen ◽  
Kit M. Kovacs
Keyword(s):  
Serum Haptoglobin ◽  
Ringed Seals ◽  
Pusa Hispida

scholarly journals Indigenous knowledge of bearded seal (Erignathus barbatus), ringed seal (Pusa hispida), and spotted seal (Phoca largha) behaviour and habitat use near Utqiaġvik, Alaska

2021 ◽  
Author(s):  
Rowenna Gryba ◽  
Henry P Huntington ◽  
Andrew L. Von Duyke ◽  
Billy Adams ◽  
Brower Frantz ◽  
...  
Keyword(s):  
Climate Change ◽  
Habitat Use ◽  
Indigenous Knowledge ◽  
Municipal Government ◽  
Ringed Seal ◽  
Ringed Seals ◽  
Ice Retreat ◽  
Inland Water Bodies ◽  
Management And Conservation ◽  
Bearded Seals

Indigenous people possess information of animals’ habitat use and behaviour; information essential for management and conservation of species affected by climate change. Accessibility of species that are important to Indigenous hunters may also change with environmental conditions. We documented Indigenous Knowledge of bearded (ugruk in Iñupiaq), ringed (natchiq), and spotted seals (qasigiaq) in Utqiaġvik, Alaska, using semi-directed interviews with Iñupiaq hunters. This study originated from discussions with an agency of the regional municipal government to serve co-management efforts and understand habitat use of species subjected to climate change. Results indicated that ringed seals are associated with higher ice concentrations in winter than bearded seals and changes in sea ice retreat in spring may have greater impact on ringed seal habitat use because they are more likely to haul out on ice in spring. Additionally, all three species have foraging hotspots, used over several days by multiple individuals. Bearded seals, and to a lesser extent spotted and ringed seals, will use currents to forage. Results also revealed the use of inland water bodies and terrestrial habitat, which may become more important for bearded and ringed seals with changing ice concentrations and should be considered in management and conservation of these species.

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