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| Content Provider | Springer Nature Link |
|---|---|
| Author | Svobodová, Jana Gabrielová, Barbora Hyršl, Pavel Albrecht, Tomáš Vinkler, Michal |
| Copyright Year | 2016 |
| Abstract | According to the viability indicator hypothesis, ornaments of many bird species honestly signal individual quality and health status. In this study, we investigated the health- and stress-indicating capacity of both feather- and skin-based ornamental traits in the grey partridge (Perdix perdix), a vulnerable avian species of the European agricultural landscape. In 50 free-living males, we assessed individual health status by examining the differential and absolute leukocyte counts, absolute erythrocyte count, complement activity, and pro-inflammatory immune responsiveness to phytohaemagglutinin (PHA). We found that males expressing extensive melanin-pigmented breast ornaments developed stronger skin inflammation after PHA stimulation than males with limited ornaments, suggesting that these are high-quality individuals that are able to mount a robust immune response. Furthermore, we found that the UV signal of the carotenoid-pigmented eye patch ornament is negatively related to the absolute immature erythrocyte count and the peripheral blood heterophil/lymphocyte (H/L) ratio, indicating that males with a slow pace of life and healthier males express skin ornaments with higher UV reflectance. Ornamental colouration in grey partridge males may, therefore, serve as a reliable signal of condition (in terms of resource balance) and health (in terms of stress resistance) to females. Melanin- und karotinoidbasierte Ornamentation hängt bei freilebenden Rebhühnern ( Perdix perdix ) von der individuellen Körperkondition ab. Gemäß der Handicap-Hypothese dienen die Ornamente vieler Vogelarten als ehrliches Signal für individuelle Qualität und Gesundheitszustand. In dieser Studie untersuchten wir die gesundheits- und stressanzeigende Funktion von ornamentalen Merkmalen sowohl des Gefieders als auch der Hautpartien bei Rebhühnern (Perdix perdix), einer gefährdeten Vogelart europäischer Agrarlandschaften. Wir bewerteten den individuellen Gesundheitszustand von 50 freilebenden Männchen, indem wir die differenziellen und absoluten Leukozytenzahlen, die absoluten Erythrozytenzahlen, die Aktivität des Komplementsystems und die proinflammatorische Immunantwort auf Phytohämagglutinin (PHA) betrachteten. Wir stellten fest, dass Männchen, welche ausgedehnte melaninpigmentierte Brustornamente trugen, nach PHA-Stimulation eine stärkere entzündliche Hautreaktion zeigten, als Männchen mit begrenzten Ornamenten, was nahelegt, dass es sich hier um Individuen hoher Qualität handelt, die eine starke Immunantwort aktivieren können. Weiterhin fanden wir heraus, dass das UV-Signal des durch Karotinoidpigmente gefärbten Augenflecks in negativem Verhältnis zur absoluten Anzahl unreifer Erythrozyten und dem peripheren H/L-Verhältnis (Heterophile Granulozyten/Lymphozyten) steht, was andeutet, dass Männchen mit ruhigem Lebenswandel und besserer Gesundheit Hautornamente mit höherer UV-Reflexion ausbilden. Die Schmuckfärbung männlicher Rebhühner kann daher den Weibchen als zuverlässiges Signal für Körperkondition (im Hinblick auf die Ressourcenbilanz) und Gesundheit (bezüglich der Stressresistenz) dienen. |
| Starting Page | 1007 |
| Ending Page | 1015 |
| Page Count | 9 |
| File Format | |
| ISSN | 21937192 |
| Journal | Journal für Ornithologie |
| Volume Number | 157 |
| Issue Number | 4 |
| e-ISSN | 21937206 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2016-05-05 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Complement Condition-dependent sexual signalling Carotenoid and melanin colouration Game bird Haematology Phytohaemagglutinin Zoology Ecology Fish & Wildlife Biology & Management |
| Content Type | Text |
| Resource Type | Article |
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