Variation with Land Use of Immune Function and Prevalence of Avian Pox in Galapagos Finches

Zylberberg, Maxine; Lee, Kelly A.; Klasing, Kirk C.; Wikelski, Martin

Variation with Land Use of Immune Function and Prevalence of Avian Pox in Galapagos Finches

Dateien

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Datum

2013

Autor:innen

Zylberberg, Maxine

Lee, Kelly A.

Klasing, Kirk C.

Wikelski, Martin

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Conservation Biology. 2013, 27(1), pp. 103-112. ISSN 0888-8892. eISSN 1523-1739. Available under: doi: 10.1111/j.1523-1739.2012.01944.x

Zusammenfassung

Introduced disease has been implicated in recent wildlife extinctions and population declines worldwide. Both anthropogenic-induced change and natural environmental features can affect pathogen spread. Furthermore, environmental disturbance can result in changes in stress physiology, nutrition, and social structure, which in turn can suppress immune system function. However, it remains unknown whether landscape variation results in heterogeneity in host resistance to pathogens. Avian pox virus, a pathogen implicated in avian declines and extinctions in Hawaii, was introduced to the Galapagos in the 1890 s, and prevalence (total number of current infections) has increased recently in finches. We tested whether prevalence and recovery trends in 7 species of Galapagos finches varied by elevation or human land use. To do so, we used infection data obtained from 545 wild-caught birds. In addition, we determined whether annual changes in 4 aspects of innate immune function (complement protein activity, natural antibody activity, concentration of PIT54 protein, and heterophil:lymphocyte ratio) varied by elevation or land use. Prevalence and recovery rates did not vary by elevation from 2008 to 2009. Avian pox prevalence and proportion of recovered individuals in undeveloped and urban areas did not change from 2008 to 2009. In agricultural areas, avian pox prevalence increased 8-fold (from 2% to 17% of 234 individuals sampled) and proportion of recovered individuals increased (11% to 19%) from 2008 to 2009. These results suggest high disease-related mortality. Variation in immune function across human land-use types correlated with variation in both increased prevalence and susceptibility, which indicates changes in innate immune function may underlie changes in disease susceptibility. Our results suggest anthropogenic disturbance, in particular agricultural practices, may underlie immunological changes in host species that themselves contribute to pathogen emergence.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

ZYLBERBERG, Maxine, Kelly A. LEE, Kirk C. KLASING, Martin WIKELSKI, 2013. Variation with Land Use of Immune Function and Prevalence of Avian Pox in Galapagos Finches. In: Conservation Biology. 2013, 27(1), pp. 103-112. ISSN 0888-8892. eISSN 1523-1739. Available under: doi: 10.1111/j.1523-1739.2012.01944.x

BibTex

@article{Zylberberg2013-02Varia-38291,
  year={2013},
  doi={10.1111/j.1523-1739.2012.01944.x},
  title={Variation with Land Use of Immune Function and Prevalence of Avian Pox in Galapagos Finches},
  number={1},
  volume={27},
  issn={0888-8892},
  journal={Conservation Biology},
  pages={103--112},
  author={Zylberberg, Maxine and Lee, Kelly A. and Klasing, Kirk C. and Wikelski, Martin}
}

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