Parasitism, life history traits and immune defence in cyprinid fish from Central Europe

Autor: Pavel Jurajda, Serge Morand, Eva Ottová, Thomas Lafond, Markéta Ondračková, Andrea Vetešníková Šimková
Přispěvatelé: Institute of Botany and Zoology Faculty of Science, Masaryk University [Brno] (MUNI), Parasitologie évolutive (PE), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institute of Vertebrate Biology of the Czech Academy of Sciences (IVB / CAS), Czech Academy of Sciences [Prague] (CAS), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE)
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: BMC Evolutionary Biology
BMC Evolutionary Biology, Vol 8, Iss 1, p 29 (2008)
BMC Evolutionary Biology, BioMed Central, 2008, 8, pp.n°29. ⟨10.1186/1471-2148-8-29⟩
BMC Evolutionary Biology, 2008, 8, pp.n°29. ⟨10.1186/1471-2148-8-29⟩
ResearcherID
ISSN: 1471-2148
DOI: 10.1186/1471-2148-8-29⟩
Popis: Background The main prediction of life-history theory is that optimal energy allocated among the traits is related to the growth, maintenance and survival. It is hypothesized that the optimal resource allocated to immune function, which generates resistance towards parasites and reduce the fitness losses caused by parasitism, is depending on other requirements for energetic resource and the benefits associated with them. The aims of this study are to investigate in a comparative way (1) how parasitism is related to fish life history traits (fecundity, longevity, mortality), (2) whether there is a trade-off between reproduction and immune investments in fish females (i.e. energetic hypothesis) and in males (i.e. immunohandicap hypothesis), (3) whether parasitism influences host immunity (spleen size) and reproduction (gonad size) in females and males. Results Data on metazoan parasites of 23 cyprinid fish species from Central Europe were used for the analyses as well as new data collected from a field study. Ectoparasite species richness was negatively correlated with the fish mortality estimated by the k-value and positively correlated with fish body size, suggesting that parasite diversity increases with fish longevity. A negative relationship between spleen size and gonad size, controlling for fish body size, was found in females but not in males. Moreover, parasite abundance was positively correlated with fish spleen size and negatively with fish gonad size in females. Conclusion The comparative analyses using cyprinid fish species demonstrated that natural mortality could be considered as a factor contributing to the variability of parasite species richness and moreover, parasite species benefit from long-lived fish. The results obtained from the analyses investigating the potential trade-off between reproduction and immunity could be interpreted as an energetic trade-off between female reproduction and immune function. The lack of negative relationship between gonad size and spleen size in males did not support our prediction based on the immunohandicap hypothesis.
Databáze: OpenAIRE
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