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3. Marine birds in the marginal ice zone of the Barents Sea in late winter and spring

Author

Hunt, GL, Bakken, V, and Mehlum, F

Subjects
marine birds, northern fulmar, Fulmarus glacialis, black-legged kittiwake, Rissa tridactyla, thick-billed murre, Uria lomvia, dovekie, Alle alle, marginal ice zone, Barents Sea, Ecology, Geology, Physical Geography and Environmental Geoscience
Abstract

We recorded the distribution and abundance of marine birds in the northern Barents Sea from 27 February to 8 March 1987 and from 20 to 31 May 1988. Birds were more abundant in waters associated with pack ice than in open water away from pack ice. Within the pack ice, thick-billed murres (Uria lomvia) were the most commonly encountered birds in both periods. Murre densities in the pack ice north of the zone proximate to the ice edge were positively correlated with distance from the ice edge. Large leads were more frequently occupied by murres than small leads, and had larger numbers of birds present. In spring, we found more birds along a well-defined ice edge than were present either in open water or in leads in the pack ice within 5 nautical miles of the ice edge. Transects along the ice edge revealed little correlation in abundance between species, or within species when coverage was repeated during the same day. We conclude that the birds showed considerable specificity of habitat choice within the habitat divisions that we recognized and that avian patches were of short duration. We need information on the distribution, abundance and movements of prey patches if we are to understand the changing distribution patterns of the birds.

Published
1996

12. Editorial Acknowledgment

Author

Aarvak, T., Abedi-Valugerdi, M., Abrahamsen, T., Akdis, C., Akuffo, H.O., Alarcon-Riquelme, M., Andersen, P., Arstila, P., Austgulen, R., Baecker-Allan, C., Baggiolini, M., Baker, B.S., Bakke, O., Bakken, V., Barclay, A.N., Bemark, M., Benestad, H.B., Berzins, K., Bjerkvik, R., Bjørge, L., Bland, P., Bolstad, A.I., Born, W., Bowman, S., Brinchmann, J., Britton, S., Brokstad, K.A., Brunet, L.R., Bruserud, Ø., Cardona, P.J., Ceyppens, J.L., Cirino, G., Cohn, M., Cox, R.J., Cunliffe, J., Dahlgren, U., Dellacasagrande, J., Ditzel, H., Dobryszycka, E., Dyrhol-Riise, A.M., Edwards, J.C., Egeland, T., Elsayed, S., Eray, M., Erb, K.J., Esch, T., Eugen-Olsen, J., Everse, L.A., Fagerhol, M., Farstad, I., Feldmann, M., Fernandez, C., Fleck, M., Franksson, R., Freitas, A., Garred, P., Gidlund, M., Gilhus, N.E., Goldbach-Mansky, R., Gordon, J., Gordon, T., Grandien, A., Gregerson, P., Grewal, H., Hakulinen, J., Halstensen, T., Haneberg, B., Hanej, S.H.E., Hansen, T., Harley, J.B., Haukenes, G., Hengartner, H., Henz, B.M., Holen, E., Hurme, M., Husby, G., Husby, S., Hörnqvist-Hultgren, E., Haaheim, L.R., Isenberg, D., Jahnson, F., Jakobsen, H., James, J.A., Jansson, J.O., Jarva, H., Jeansson, S., Johannessen, A.C., Johansen, F.E., Julkunen, I., Kalland, K.H., Kaye, J., Kazatchkine, M., Kihlström, E., Kohler, L., Konttinen, Y., Kotenko, S., Koutzov, S., Krammer, P., Kristoffersen, E., Kunzendorf, U., Lachmann, P., Langman, R., Langner, J., Lanzavecchia, L., Lappalainen, M., Laskay, T., Lea, T., Lefvert, A.K., Lehmann, A.C., Louka, A, Lúdviksson, B.R., Mariette, X., Marion, T., Marker-Herrmann, E., Mattsson, R., McAdam, S., Mellbye, O.J., Mellgren, G., Mellgren, S.I., Mestecky, J., Michaelsen, T., Michalek, S., Miettinen, A., Moestrup, S.K., Moretta, A., Moser, M., Mountz, J., Moutsopoulos, H., Munthe, L.A., Mustafa, T., Myrmel, H., Nannemark, G., Netea, M.G., Nilsen, R., Notarangelo, L.D., Ögmundsdóttir, H., Olsson, I., Olweus, J., Osland, A., Paludan, S.R., Parsons, K.R., Patarroyo, M., Paul, W.E., Perlman, P., Pollock, J.M., Puolakkainen, M., Quale, A., Rajewsky, K., Raman, C., Reichlin, M., Renkonen, R., Rese Shadidi, K., Ricciardi-Castagnoli, P., Rickinson, A.B., Ringdén, O., Risto, R., Rodinov, D., Rosenkrands, I., Rottenberg, M., Russel, M., Rygaard, J., Rødahl, E., Röllinghof, M., Sandberg, M., Schenk, K., Seppälä, I., Shevach, E., Shortman, K., Siegrist, C.A., Sigurdardóttir, S., Silvennoinen, O., Sinigaglia, F., Sistonen, L., Skarstein, K., Skogh, T., Smith, E., Spurkland, A., Stendahl, O., Sugden, B., Suri-Payer, E., Svennerholm, A.M., Szodoray, P., Theofilopoulos, A., Thorley-Lawson, D.A., Timonen, T., Trowsdale, J., Tuomo, T., Ulmer, A.J., Ulvestad, E., Ulvik, R., Vaerman, J.P., van, der Merwe J.P., van Eden, W., Vedeler, C., Vintermyr, O.K., Vyse, J., Wahlgren, M., Wahren-Herlenius, M., Walsh, L.J., Weetman, A.P., Westermark, P., Wiker, H., Yang, J., Yewdell, J.W., Youinou, P., and Zouali, M.

Published
2002

29. Prevalence of Aggregatibacter actinomycetemcomitans in Sudanese patients with aggressive periodontitis: a case-control study

Author

Elamin, A, Albandar, J M, Poulsen, K, Ali, R W, and Bakken, V

Abstract

Elamin A, Albandar JM, Poulsen K, Ali RW, Bakken V. Prevalence ofAggregatibacter actinomycetemcomitansin Sudanese patients with aggressive periodontitis: a case-control study. J Periodont Res 2011; 46: 285-291.©2011 John Wiley & Sons A/S Background and Objective: Aggregatibacter actinomycetemcomitans is considered a possible etiological agent for aggressive periodontitis. The aim of this study was to determine the prevalence of the JP2 clone and non-JP2 genotypes of A. actinomycetemcomitans in the subgingival plaque of patients with aggressive periodontitis and controls among Sudanese high-school students. Material and Methods: In a previous study we examined a large representative sample of students attending high schools in Khartoum, Sudan. In this population, 17 patients with aggressive periodontitis and 17 controls (14-19 years of age) consented to participate in the present study. The subjects underwent a clinical periodontal examination, and subgingival dental plaque samples were collected using paper points. The presence of the A. actinomycetemcomitans JP2 clone and non-JP2 genotypes were assessed using loop-mediated isothermal amplification (LAMP) and the PCR. Results: The JP2 clone of A. actinomycetemcomitans was not detected in the subgingival plaque of either the cases or the controls. Non-JP2 types of A. actinomycetemcomitans were detected in the subgingival plaque of 12 (70.6%) patients with aggressive periodontitis and from only one (5.9%) control subject, showing a significantly higher frequency of detection in cases than in controls (p = 0.0001). The odds ratio for the detection of A. actinomycetemcomitans in the subgingival plaque of the patients with aggressive periodontitis was 38.4 (95% confidence interval: 4.0-373.0; p = 0.002). The PCR and LAMP methods showed identical results pertaining to the identification of non-JP2 types of A. actinomycetemcomitans. Conclusions: The JP2 clone of A. actinomycetemcomitans was not detected in the subgingival plaque of high school subjects in Sudan. The detection of non-JP2 types of A. actinomycetemcomitans may be a useful marker of increased risk for development of aggressive periodontitis in young subjects.

Published
2011

42. Induction of systemic murine B-cell responses by <em>Fusobacterium nucleatum</em>and <em>Porphyromonas gingivalis</em>.

Author

Nunes, I. P., Jonsson, R., Jensen, H. B., and Bakken, V.

Subjects
FUSOBACTERIUM, ENZYME-linked immunosorbent assay, IMMUNOGLOBULIN M, BIOMOLECULES, BLOOD plasma, SERUM, PROTEINS
Abstract

The purpose of this study was to examine the antigenic abilities of Fusobacterium nucleatum strain ATCC 25586 and Porphyromonas gingivalis strain W50 black in- bred BALB/cABom mice immunized subcutaneously. Furthermore, we aimed to analyze whether the outer membranes (OM) and whole cells (WC) of F. nucleaturn or P. gingivalis had an effect on the levels of antibody response and whether a combination of both could either enhance or suppress the B-cell response. A single-cell assay, solid-phase enzyme-linked immunospo (ELISPOT), was used to analyze the splenic B-cell response (immunoglobulin A (IgA), IgG and IgM). Enzyme-linked immunosorbent assay (ELISA) and immunoblotting were used to verify the specific antibody response in the sera. A statistically significant lower level of spontaneous antibody production was observed in the group immunized with P. gingivalis OM compared with groups immunized with F. nucleatum and saline. The specific antibody titers measured by ELISA indicated that the bacterial preparations were able to induce IgG and IgM response. The preparations containing F. gingivalis OM induced higher humoral response than the preparations containing P. gingivalis WC, but for F. nucleatum such a difference was not observed. The prominent proteins revealed had apparent molecular masses of 40 kDa for F. nucleatum and 115, 55-56 and 43kDa for P. gingivalis whereas the immunoreactive proteins were 70, 65 and 40 kDa for mice immunized with F. nucleatum and 115, 55-56, 43 and 33-34 kDa for mice immunized with P. gingivalis. Quantitative analysis of B-cell response at the single cell level with ELISPOT revealed that some component (s) of P. gingivalis OM may have a suppressive ability on splenocytes incubated for a short time. [ABSTRACT FROM AUTHOR]

Published
1996
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50. Exchange mechanisms and energy dependence of isospin amplitudes for the reaction pN → NNπ in the energy range 5–1480 GeV

Author

Dahl-Jensen, E., primary, Dahl-Jensen, I., additional, Hansen, J.D., additional, Möllerud, R., additional, Mäkelä, J., additional, Pimiä, M., additional, Sundell, E., additional, Bakken, V., additional, Haldorsen, J., additional, Jacobsen, T., additional, Skjevling, G., additional, Ekspong, G., additional, Johansson, H., additional, Lundborg, P., additional, and Selldén, B., additional

Published
1975
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