Publications

genetic diversity of historical atlantic walruses (odobenus rosmarus rosmarus) from bjørnøya and håøya (tusenøyane), svalbard, norway.	the population size of atlantic walruses (odobenus rosmarus rosmarus) is depleted relative to historical abundance levels. in svalbard, centuries of over-exploitation brought the walrus herds to the verge of extinction, and such bottlenecks may have caused loss of genetic variation. to address this for svalbard walruses, mitochondrial haplotypes of historical walruses from two major haul-out sites, bjørnøya and håøya, within the archipelago were explored using bone samples from animals killed du ...	2016	26892244
towards a better understanding of the effects of uv on atlantic walruses, odobenus rosmarus rosmarus: a study combining histological data with local ecological knowledge.	walruses, odobenus rosmarus, play a key role in the arctic ecosystem, including northern indigenous communities, which are reliant upon walruses for aspects of their diet and culture. however, walruses face varied environmental threats including rising sea-water temperatures and decreasing ice cover. an underappreciated threat may be the large amount of solar ultraviolet radiation (uv) that continues to reach the arctic as a result of ozone loss. uv has been shown to negatively affect whales. li ...	2016	27049757
demographic inferences using short-read genomic data in an approximate bayesian computation framework: in silico evaluation of power, biases and proof of concept in atlantic walrus.	approximate bayesian computation (abc) is a powerful tool for model-based inference of demographic histories from large genetic data sets. for most organisms, its implementation has been hampered by the lack of sufficient genetic data. genotyping-by-sequencing (gbs) provides cheap genome-scale data to fill this gap, but its potential has not fully been exploited. here, we explored power, precision and biases of a coalescent-based abc approach where gbs data were modelled with either a population ...	2015	25482153
the insular cortex: a review.	the human insular cortex forms a distinct, but entirely hidden lobe, situated in the depth of the sylvian fissure. here, we first review the recent literature on the connectivity and the functions of this structure. it appears that this small lobe, taking up less than 2% of the total cortical surface area, receives afferents from some sensory thalamic nuclei, is (mostly reciprocally) connected with the amygdala and with many limbic and association cortical areas, and is implicated in an astonish ...	2012	22230626
immunohistochemical characterization of selected cell markers for the detection of hematopoietic cells in formalin-fixed, paraffin wax-embedded lymphoid tissues of harbor seals (phoca vitulina) and walruses (odobenus rosmarus rosmarus).	to facilitate a detailed investigation of pinniped lymphoid organs, 30 monoclonal antibodies (mab) as well as eight polyclonal antibodies (pab) of different species specificities directed against cell antigens of the hematopoietic system were tested for immunohistochemical cross-reactivity on formalin-fixed, paraffin wax-embedded tissues of harbor seals (phoca vitulina) and a walrus (odobenus rosmarus rosmarus). six monoclonal and eight polyclonal antibodies showed specific immunoreactivities. l ...	2010	20566219
the insular cortex: a comparative perspective.	the human insular cortex is involved in a variety of viscerosensory, visceromotor, and interoceptive functions, and plays a role in complex processes such as emotions, music, and language. across mammals, the insula has considerable morphologic variability. we review the structure and connectivity of the insula in laboratory animals (mouse, domestic cat, macaque monkey), and we present original data on the morphology and cytoarchitecture of insular cortex in less common species including a large ...	2010	20512368
mother-calf vocal communication in atlantic walrus: a first field experimental study.	in all colonial pinnipeds studied, mother-young vocal recognition exists and allows rapid and reliable meetings in spite of the confusing environment of the breeding colony. the efficiency of this recognition process guarantees pup survival, especially in species where females alternate foraging sea trips and lactation periods on land. the atlantic walrus (odobenus rosmarus rosmarus) is a highly gregarious pinniped with females attending their calves for an extended period of time (2-3 years). a ...	2010	19960216
serum chemistry reference values in free-ranging north atlantic male walruses (odobenus rosmarus rosmarus) from the svalbard archipelago.	information regarding health and disease is limited for walruses, a keystone species in arctic marine ecosystems. serum chemistry analysis is a useful clinical tool for the health assessment of walruses, but only a few captive pacific walruses have been evaluated.	2009	19473331
temporal trends of mercury in marine biota of west and northwest greenland.	temporal trends in mercury concentrations ([hg]) during the last two to three decades were determined in liver of shorthorn sculpin, ringed seal and atlantic walrus from northwest greenland (nwg, 77 degrees n) and in liver of shorthorn sculpin and ringed seal from central west greenland (cwg, 69 degrees n) during the last decade. stable-nitrogen (delta(15)n) and carbon (delta(13)c) isotope values were determined in muscle of ringed seals to provide insight into potential trophic level changes th ...	2007	17049950
serologic evidence of influenza a infection in marine mammals of arctic canada.	a serologic survey of influenza a antibodies was undertaken on 1,611 blood samples from five species of marine mammals collected from arctic canada from 1984-98. sampling was done in 24 locations throughout the canadian arctic encompassing sachs harbor (72 degrees n, 125 degrees w), northwest territories in the west to loks land (63 degrees n, 64 degrees w), nunavut in the east, to eureka (80 degrees n, 86 degrees w), nunavut in the north to sanikiluaq (56 degrees n, 79 degrees w), nunavut in th ...	2001	11763748
a morbillivirus antibody survey of atlantic walrus, narwhal and beluga in canada.	a longitudinal serologic survey was conducted for morbillivirus antibodies in atlantic walruses (odobenus rosmarus rosmarus), narwhal (monodon monoceros), and beluga (delphinapterus leucas) from the northwest territories, nunavut and the st. lawrence estuary (canada). sixty-five of 131 (50%) walruses sampled between 1984 and 1993 had detectable morbillivirus neutralizing antibodies. positive walrus were identified from four of five arctic sampling sites, to as far back as 1984. prevalence of mor ...	2000	10941737
temporal and spatial trends of persistent organochlorines in greenland walrus (odobenus rosmarus rosmarus).	persistent organochlorines [pcbs, ddt and chlordane related compounds, dieldrin, toxaphene, hexachlorocyclohexane (hch), chlorobenzenes] were determined in blubber of atlantic walrus (odobenus rosmarus rosmarus) in 1978 and 1988 from the avanersuaq (thule) region of north-west greenland and in 1989 from ittoqqortoormiit (scoresbysund) in east greenland. lowest concentrations of organochlorines (ocs) were found in the samples from the avanersuaq region while much higher levels of all compounds, e ...	2000	10682357
microsatellites from the atlantic walrus odobenus rosmarus rosmarus.		1998	9711867
population structure and gene flow of the atlantic walrus (odobenus rosmarus rosmarus) in the eastern atlantic arctic based on mitochondrial dna and microsatellite variation.	the population structure of the atlantic walrus, odobenus rosmarus rosmarus, was studied using 11 polymorphic microsatellites and restriction fragment length polymorphism detected in the nadh-dehydrogenase nd1, nd2 and nd3/4 segments in mtdna. a total of 105 walrus samples were analysed from northwest (nw) greenland, east (e) greenland, svalbard and franz joseph land. two of the 10 haplotypes detected in the four samples were diagnostic for the nw greenland sample, which implied that the group o ...	1998	9787444
neutralizing antibodies to phocine distemper virus in atlantic walruses (odobenus rosmarus rosmarus) from arctic canada.	the first evidence of phocine distemper virus (pdv) infection in atlantic walruses (odobenus rosmarus rosmarus) from nottingham island, northwest territories, canada, is reported. blood samples were collected from three male walruses killed by inuit hunters in the fall of 1990. differential virus neutralization test for each animal yielded higher titers against pdv than against other members of the morbillivirus genus including canine distemper, peste des petits ruminants, rinderpest and measles ...	1994	8151831
[osteology of the atlantic walrus (odobenus rosmarus, l., 1758). axial skeleton].		1983	6222671
electrophoretic variation in large mammals iv. the atlantic walrus, odobenus rosmarus rosmarus (l.).		1982	7129943
[osteology of the atlantic walrus (odobenus rosmarus, l., 1758), trunk and limbs].		1981	6462067
hypertrophic bone lesion in an atlantic walrus (odobenus odobenus).		1977	883093