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| 3. |
- Ekblom, Robert, Docent, 1976-
(författare)
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Dubbelbeckasinens spel
- 2007
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Ingår i: Fauna och flora. - 0014-8903. ; 102, s. 2-4
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 4. |
- Ekblom, Robert, Docent, 1976-
(författare)
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Dubbelbeckasinens spel
- 2006
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Ingår i: Vår Fågelvärld. - 0042-2649. ; :3, s. 20-21
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 5. |
- Ekblom, Robert, et al.
(författare)
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Female choice and male humoral immune response in the lekking great snipe (Gallinago media)
- 2005
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Ingår i: Behavioral Ecology. - : Oxford University Press (OUP). - 1045-2249 .- 1465-7279. ; 16:2, s. 346-351
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Tidskriftsartikel (refereegranskat)abstract
- Parasites and diseases constitute major evolutionary forces in many natural populations, and thus having an efficient immune defense to resist infections is crucial for many organisms. Properties of the immune response may also influence mate choice decisions in many animals. Theory predicts several advantages for females when choosing males with superior immune systems. These benefits can be both direct (e.g. increased paternal care and reduced disease transmission) and indirect (good genes). We have investigated female choice with respect to antibody response to two novel antigens in males of a lekking bird, the great snipe (Gallinago media). Because of the lek mating system, female choice probably mainly incurs indirect (genetic) rather than direct benefits. Males responded to vaccination with diphtheria and tetanus toxoids by producing specific antibodies to both antigens. Triggering the immune system had no negative impact on display activities or survival. Males that were chosen by females as mates had on average higher antibody response to the tetanus antigen than their neighbors. We did not, however, find any covariance between the strength of the antibody response and male mating success.
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| 8. |
- Ekblom, Robert, Docent, 1976-
(författare)
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På vinterinventering
- 2006
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Ingår i: Vår Fågelvärld. - 0042-2649. ; :8, s. 32-34
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 9. |
- Ekblom, Robert, Docent, 1976-
(författare)
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Smörbollsflugornas fantastiska värld
- 2007
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Ingår i: Fauna och flora. - 0014-8903. ; 201, s. 20-22
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 10. |
- Ekblom, Robert, et al.
(författare)
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Spatial pattern of MHC class II variation in the great snipe (Gallinago media)
- 2007
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Ingår i: Molecular Ecology. - 0962-1083 .- 1365-294X. ; 16:7, s. 1439-1451
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Tidskriftsartikel (refereegranskat)abstract
- The genes of the major histocompatibility complex (MHC) code for proteins involved in antigen recognition and triggering of the adaptive immune response, and are therefore likely to be under selection from parasites. These selection regimes may vary in space and time. Here we report a strong geographical structure in MHC class II B genes of a migrating bird, the great snipe (Gallinago media). Genetic differentiation in the MHC between two ecologically distinct distributional regions (Scandinavian mountain populations vs. East European lowland populations) was still present after statistically controlling for the effect of selectively neutral variation (microsatellites) using partial Mantel tests. This suggests a role for selection in generating this spatial structure and that it represents local adaptation to different environments. Differentiation between populations within the two regions was negligible. Overall, we found a high number of MHC alleles (50, from 175 individuals). This, together with a tendency for a higher rate of nonsynonymous than synonymous substitutions in the peptide binding sites, and high Tajima's D in certain regions of the gene, suggests a history of balancing selection. MHC variation is often thought to be maintained by some form of balancing selection, but the nature of this selection remains unclear. Our results support the hypothesis that spatial variation in selection regimes contributes to the high polymorphism.
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