geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Cell-mediated immunosenescence in birds


, : Cell-mediated immunosenescence in birds. Oecologia 145(2): 270-275

The phytohaemagglutinin (PHA) skin test response, used to assess cell-mediated immunity, is known to vary with many social and energetic factors, but the effects of age have received little attention. We found that the PHA response of immature birds was lower than those of the youngest breeding adults and were decreased in adults. Whenever possible, age should be included as a covariate when the PHA skin test is used to assess immunocompetence in ecological immunology. The rate of decline in PHA response differed between species and was inversely correlated with survival. The decrease in the PHA response averaged 57% over an average 80% of the maximum life span, but the absolute rate varied with species lifespan such that the short-lived species showed a greater loss per year than the long-lived species. This link between declining immune function and survival may reflect differences in resource partitioning between species, and suggests that selection may act on investment in immune function to influence maximum life span.

US$19.90

PMID: 15959821

DOI: 10.1007/s00442-005-0123-3


Other references

Szymańska, A.; Gołabek, Wław.; Szymański, M.; Morshed, K.; Trojanowska, A., 2008: Diagnostic evaluation of temporal paragangliomas. Paragangliomas are rare tumours deriving from paraganglia--small bodies of neuroendocrine tissue. Approximately 3% of paragangliomas occur in the head and neck area accounting for about 0,6% of all tumours of this region. Head and neck paraganglio...

Cragar, D.E.; Berry, D.T.R.; Fakhoury, T.A.; Cibula, J.E.; Schmitt, F.A., 2006: Performance of patients with epilepsy or psychogenic non-epileptic seizures on four measures of effort. Exaggeration of cognitive symptoms or poor effort on cognitive testing has been addressed primarily in the traumatic brain injury literature. The present investigation aims to extend the evaluation of effort to the epilepsy monitoring setting, whe...

Blamey, R.K., 1996: Citizens, consumers and contingent valuation: clarification and the expression of citizen values and issue-opinions. A theoretical examination of the political, sociological and economic aspects of the contingent valuation method (CVM, a non-market valuation technique). Linkages are formed between the environmental ethics literature, political science, sociology...

Dolan Robert, 1967: Photographic beach measurements. An automated photographic method is described for recording short-interval changes in sand levels on a natural beach. Results of photographic techniques are compared with profiles obtained by conventional surveying methods. Lapse-time photography...

Jóźwiak, M., 2007: East European and Mediterranean meeting on cerebral palsy and developmental medicine, Warsaw, Poland, 8-10 june 2006. Developmental Medicine and Child Neurology 49(1): 79-79

Lecrubier, Y.; Pletan, Y.; Solles, A.; Tournoux, A.; Magne, V., 1996: Clinical efficacy of milnacipran: placebo-controlled trials. The clinical efficacy of milnacipran, a selective serotonin and noradrenaline reuptake inhibitor, was reviewed on the basis of three, multicentre, placebo-controlled trials in major depression. A dose-range study showed the superiority of milnacip...

Anonymous, 1964: Annual Report of the Director of Agriculture and Fisheries for the year 1963. Investigations are reported on the performance of vegetable varieties, and on the biological control of Clastoptera undulata on casuarina trees.

Lee, P.H.; Su, S.; Lee, C.S., 1982: Studies on the temporary occlusion of heptic inflow in rats. Taiwan Yi Xue Hui Za Zhi. Journal of the Formosan Medical Association 81(6): 661-669

Perombelon M.C.M.; Hyman L.J., 1989: Survival of soft rot coliforms erwinia carotovora ssp carotovora and erwinia carotovora ssp atroseptica in soil in scotland uk. An enrichment method was used to monitor Erwinia carotovora in soil or the rhizosphere of different crops and weeds in 17 fields with different cropping histories on three farms. The bacteria were detected in all fields not cropped with potatoes,...

Eisold, B.K., 1998: Recreating mother: the consolidation of "heterosexual" gender identification in the young son of homosexual men. In psychotherapy, the 4 1/2-year-old son of two fathers began immediately to contend with the unmourned loss of "Mommy," his first babysitter, precipitously fired when he was 2 1/2; he then created his own mother figure with whom to take...