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  • 2010-2014  (7)
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  • 1
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    (Table 3) Prevalence and intensity of nematoda species in stomachs and small intestines of ringed seals (Pusa hispida), northwestern Spitsbergen (2010)
    PANGAEA
    Details
    Publication Date: 2023-08-02
    Keywords: Area/locality; Billefjorden; Biological sample; BIOS; Calculated after Margolis et al. (1982); Event label; Female; Forlands-StJonsfj; Kongsfjorden; Kongsfjorden, Spitsbergen, Arctic; Latitude of event; Longitude of event; Male; NW-Spitsbergen; Parasite, relative abundance per host; Parasite intensity, individuals per infected host individual; Percentage; Phylum; Pusa hispida; Pusa hispida, parasite prevalence; Recherch-VanKeul; Species; Svalbard; Time coverage; Wijdefjorden
    Type: Dataset
    Format: text/tab-separated-values, 279 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Stomach content of ringed seals (Pusa hispida) obtained from the Northeast Greenland area (2011)
    PANGAEA
    In:  Supplement to: Labansen, Aili L; Lydersen, Christian; Levermann, Nette; Haug, Tore; Kovacs, Kit Maureen (2010): Diet of ringed seals (Pusa hispida) from Northeast Greenland. Polar Biology, 34(2), 227-234, https://doi.org/10.1007/s00300-010-0874-0
    Details
    Publication Date: 2023-12-13
    Description: The diet of ringed seals (Pusa hispida) from coastal and offshore areas of Northeast Greenland was determined by identifying, to the lowest taxonomic limit possible, all hard-part contents from the gastrointestinal tract of 51 seals sampled (2002-2004) in spring (April to June, N = 35) and autumn (September to October, N = 16). The autumn diet was characterized by high numbers of Parathemisto libellula, and the spring diet was comprised primarily of polar cod (Boreogadus saida), with few invertebrates consumed. The coastal seal diet samples had a diverse fish prey composition (during both the spring and autumn), whereas the open water seals had eaten mostly crustaceans with P. libellula being most abundant. The sample sizes from the various locations and seasons were not large enough to explore age-class effects on diet in addition. Similar to earlier studies, this study suggests that the ringed seal is a generalist that exploits prey based on availability, with a few key species dominating the diet in an area at least on a seasonal basis.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Prevalence, intensity and numbers of parasites in the gastrointestinal tract of ringed seals (Pusa hispida) (2010)
    PANGAEA
    In:  Supplement to: Johansen, Carina E; Lydersen, Christian; Aspholm, Paul E; Haug, Tore; Kovacs, Kit Maureen (2010): Helminth parasites in ringed seals (Pusa hispida) from Svalbard, Norway with special emphasis on nematodes: Variation with age, sex, diet, and location of host. Journal of Parasitology, 96(5), 946-953, https://doi.org/10.1645/GE-1685.1
    Details
    Publication Date: 2023-12-13
    Description: Complete gastrointestinal tracts from 257 ringed seals (Pusa hispida) from Svalbard, Norway, were examined for helminth parasites. Three different helminth groups were recorded (acanthocephalans 61.1%; nematodes 38%; cestodes 0.9%). Acanthocephalans (Polymorphidae) and cestodes (Anophryocephalus and Diphyllobothrium sp(p)., as well as unidentified species, were confined to the intestines. The anisakid nematodes Phocascaris phocae, Pseudoterranova sp(p)., Anisakis sp(p)., and Phocascaris/Contracaecum sp(p). were recorded in both stomachs and the anterior part of the small intestines. The abundance of nematodes and acanthocephalans varied significantly with sampling location of the seal hosts. This is likely due to the relative prevalence of Arctic versus Atlantic water in the different fjord systems, which strongly influences the age class and species of fish available as prey for the seals. Adult male ringed seals had significantly higher abundances of nematodes than did adult females or juveniles. Adult males also had significantly higher abundances of acanthocephalans than did adult females, but were not significantly different from juveniles in this regard. Nematode abundance increased significantly with age of male hosts, but this trend was lacking in female seals. Infection parameters appeared to be related to differences in the age of polar cod (Boreogadus saida) exploited by male, female, and juvenile seals.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Characteristics and stomach contents of Greenland sharks (Somniosus microcephalus) caught in Svalbard during June 2008-2009 (2012)
    PANGAEA
    In:  Supplement to: Leclerc, Lisa-Marie E; Lydersen, Christian; Haug, Tore; Bachmann, Lutz; Fisk, Aaron T; Kovacs, Kit Maureen (2012): A missing piece in the Arctic food web puzzle? Stomach contents of Greenland sharks sampled in Svalbard, Norway. Polar Biology, 35(8), 1197-1208, https://doi.org/10.1007/s00300-012-1166-7
    Details
    Publication Date: 2023-12-13
    Description: Harbour seals in Svalbard have short longevity, despite being protected from human hunting and having limited terrestrial predation at their haulout sites, low contaminant burdens and no fishery by-catch issues. This led us to explore the diet of Greenland sharks (Somniosus microcephalus) in this region as a potential seal predator. We examined gastrointestinal tracts (GITs) from 45 Greenland sharks in this study. These sharks ranged from 229 to 381 cm in fork length and 136-700 kg in body mass; all were sexually immature. Seal and whale tissues were found in 36.4 and 18.2%, respectively, of the GITs that had contents (n = 33). Based on genetic analyses, the dominant seal prey species was the ringed seal (Pusa hispida); bearded seal (Erignathus barbatus) and hooded seal (Cystophora cristata) tissues were each found in a single shark. The sharks had eaten ringed seal pups and adults based on the presence of lanugo-covered prey (pups) and age determinations based on growth rings on claws (〈1 year and adults). All of the whale tissue was from minke whale (Balenoptera acutorostrata) offal, from animals that had been harvested in the whale fishery near Svalbard. Fish dominated the sharks' diet, with Atlantic cod (Gadus morhua), Atlantic wolffish (Anarhichas lupus) and haddock (Melanogrammus aeglefinus) being the most important fish species. Circumstantial evidence suggests that these sharks actively prey on seals and fishes, in addition to eating carrion such as the whale tissue. Our study suggests that Greenland sharks may play a significant predatory role in Arctic food webs.
    Keywords: Biological sample; BIOS; International Polar Year (2007-2008); IPY; Kongsfjorden; Kongsfjorden, Spitsbergen, Arctic
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Fatty acid composition of tissue samples from Arctic walruses (Odobenus rosmarus rosmarus) and their prey (2010)
    PANGAEA
    In:  Supplement to: Skoglund, Eli G; Lydersen, Christian; Grahl-Nielsen, Otto; Haug, Tore; Kovacs, Kit Maureen (2010): Fatty acid composition of the blubber and dermis of adult male Atlantic walruses (Odobenus rosmarus rosmarus) in Svalbard, and their potential prey. Marine Biology Research, 6(3), 239-250, https://doi.org/10.1080/17451000903233755
    Details
    Publication Date: 2023-12-13
    Description: Blubber biopsies were collected from 18 adult male walruses from Svalbard, Norway. The biopsies were taken vertically through the skin and the entire blubber layer down to, but not including, the muscle layer. Fatty acid (FA) compositions of inner blubber, outer blubber and dermis of the walruses and of potential prey organisms were determined. The three layers differed significantly from one another in FA composition. Generally, the inner blubber contained more long-chained monounsaturated, saturated and polyunsaturated FAs, while the outer blubber and dermis contained more short-chained monounsaturated FAs. This stratification is similar to what has been observed in other marine mammal species. However, differences between layers were less pronounced than in most other species, possibly because the extremely thick overlying dermis of walruses provides an insulating shield, which affects the FA composition of the outer blubber. The FA composition of the potential prey organisms was different from that of the blubber of the walruses, although more similar to the inner blubber than to the outer blubber or dermis. FA composition in the inner blubber was not significantly correlated with age (assessed by tusk volume), while the FA composition of the outer blubber and dermis were significantly correlated with age.
    Keywords: International Polar Year (2007-2008); IPY; MULT; Multiple investigations; Svalbard
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table 1) Fatty acid composition of dermis and blubber samples of male Arctic walruses (Odobenus rosmarus rosmarus) in Svalbard (2010)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: 6,9,12-Hexadecatrienoic acid of total fatty acids; 9-Tetradecenoic acid of total fatty acids; all-cis-11,14-Eicosadienoic acid of total fatty acids; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-5,8,11,14-Eicosatetraenoic acid of total fatty acids; all-cis-6,9,12,15,18-Heneicosapentaenoic acid of total fatty acids; all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids; all-cis-7,10,13,16,19-Docosapentaenoic acid of total fatty acids; all-cis-8,11,14,17-Eicosatetraenoic acid of total fatty acids; all-cis-9,12-Octadecadienoic acid of total fatty acids; cis-11-Icosenoic acid of total fatty acids; cis-11-Octadecenoic acid of total fatty acids (IUPAC: Octadec-11-enoic acid); cis-13-Icosenoic acid of total fatty acids; cis-13-Octadecenoic acid of total fatty acids; cis-7-Hexadecenoic acid of total fatty acids; cis-9-Hexadecenoic acid of total fatty acids (IUPAC: (9Z)-hexadec-9-enoic acid); cis-9-Icosanoic acid of total fatty acids; cis-9-Octadecenoic acid of total fatty acids (IUPAC: Octadec-9-enoic acid); Fatty acids; Fatty acids, standard deviation; Gas chromatograph, Hewlett-Packard; Gas chromatography; Hexadecanoic acid of total fatty acids; Monounsaturated fatty acids of total fatty acids; MULT; Multiple investigations; Octadecanoic acid of total fatty acids; Polyunsaturated fatty acids of total fatty acids; Sample type; Saturated fatty acids of total fatty acids; Species; Svalbard; Tetradecanoic acid of total fatty acids
    Type: Dataset
    Format: text/tab-separated-values, 159 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table 2) Fatty acid composition of prey species of Arctic walruses (Odobenus rosmarus rosmarus) in Svalbard (2010)
    PANGAEA
    Details
    Publication Date: 2024-05-15
    Keywords: 6,9,12-Hexadecatrienoic acid of total fatty acids; 9-Tetradecenoic acid of total fatty acids; all-cis-11,14-Eicosadienoic acid of total fatty acids; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-5,8,11,14-Eicosatetraenoic acid of total fatty acids; all-cis-6,9,12,15,18-Heneicosapentaenoic acid of total fatty acids; all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids; all-cis-7,10,13,16,19-Docosapentaenoic acid of total fatty acids; all-cis-8,11,14,17-Eicosatetraenoic acid of total fatty acids; all-cis-9,12-Octadecadienoic acid of total fatty acids; cis-11-Icosenoic acid of total fatty acids; cis-11-Octadecenoic acid of total fatty acids (IUPAC: Octadec-11-enoic acid); cis-13-Icosenoic acid of total fatty acids; cis-13-Octadecenoic acid of total fatty acids; cis-7-Hexadecenoic acid of total fatty acids; cis-9-Hexadecenoic acid of total fatty acids (IUPAC: (9Z)-hexadec-9-enoic acid); cis-9-Icosanoic acid of total fatty acids; cis-9-Octadecenoic acid of total fatty acids (IUPAC: Octadec-9-enoic acid); Fatty acids; Fatty acids, standard deviation; Gas chromatograph, Hewlett-Packard; Gas chromatography; Hexadecanoic acid of total fatty acids; Monounsaturated fatty acids of total fatty acids; MULT; Multiple investigations; Octadecanoic acid of total fatty acids; Polyunsaturated fatty acids of total fatty acids; Sample type; Saturated fatty acids of total fatty acids; Species; Svalbard; Tetradecanoic acid of total fatty acids
    Type: Dataset
    Format: text/tab-separated-values, 561 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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