Genetic and environmental components of phenotypic variation in immune response and body size of a colonial bird, Delichon urbica (the house martin).

Details

Serval ID
serval:BIB_26A8482A6043
Type
Article: article from journal or magazin.
Collection
Publications
Title
Genetic and environmental components of phenotypic variation in immune response and body size of a colonial bird, Delichon urbica (the house martin).
Journal
Heredity
Author(s)
Christe P., Moller A.P., Saino N., De Lope F.
ISSN
0018-067X (Print)
ISSN-L
0018-067X
Publication state
Published
Issued date
2000
Peer-reviewed
Oui
Volume
85 ( Pt 1)
Pages
75-83
Language
english
Abstract
Directional selection for parasite resistance is often intense in highly social host species. Using a partial cross-fostering experiment we studied environmental and genetic variation in immune response and morphology in a highly colonial bird species, the house martin (Delichon urbica). We manipulated intensity of infestation of house martin nests by the haematophagous parasitic house martin bug Oeciacus hirundinis either by spraying nests with a weak pesticide or by inoculating them with 50 bugs. Parasitism significantly affected tarsus length, T cell response, immunoglobulin and leucocyte concentrations. We found evidence of strong environmental effects on nestling body mass, body condition, wing length and tarsus length, and evidence of significant additive genetic variance for wing length and haematocrit. We found significant environmental variance, but no significant additive genetic variance in immune response parameters such as T cell response to the antigenic phytohemagglutinin, immunoglobulins, and relative and absolute numbers of leucocytes. Environmental variances were generally greater than additive genetic variances, and the low heritabilities of phenotypic traits were mainly a consequence of large environmental variances and small additive genetic variances. Hence, highly social bird species such as the house martin, which are subject to intense selection by parasites, have a limited scope for immediate microevolutionary response to selection because of low heritabilities, but also a limited scope for long-term response to selection because evolvability as indicated by small additive genetic coefficients of variation is weak.
Keywords
Analysis of Variance, Animals, Birds/genetics, Birds/immunology, Environment, Female, Genetic Variation, Genotype, Immunoglobulins/immunology, Leukocytes/immunology, Male, Phenotype, T-Lymphocytes/immunology
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 20:14
Last modification date
20/08/2019 14:05
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