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Condition dependence of secondary ornamentation and mate choice in Grey Partridges
Gabrielová, Barbora ; Albrecht, Tomáš (advisor) ; Sedláček, Ondřej (referee)
This study focuses on relationships between individual condition, measures of ornament expression and mate choice in the Grey Partridge (Perdix perdix). It is based on the correlative data as well as results of manipulative experiments. I found positive correlation between the size of melanin- and carotenoid-based ornaments in partridges. The size and the redness of the carotenoid skin patch, and the size of the melanin-based feather ornamentation were associated with several measures of immunity and overall body condition (complement activity, ratio of immature erythrocytes, heterophil/leucocyte ratio, response to novel antigen). Furthermore, data from natural populations indicate that the expression of carotenoid-based ornamentation is associated with sexual attractiveness (measured as the ability to obtain a social mate) in partridges. Data from captive individuals indicate that carotenoid supplementation improves the redness of carotenoid-based ornament, while the stimulation of the immune system under increasing concentrations of supplemented carotenoids has no measurable effect on condition and physiological state. This seems to contradict predictions of the 'Carotenoid maintenance hypothesis'. Overall, results better understanding the role of carotenoid and melanin-based ornamentation in signaling...
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Development of Grey Partridge (Perdix perdix) microsatellite markers
Vaněčková, Dominika ; Munclinger, Pavel (advisor) ; Burri, Marta (referee)
The aim of this work was the construction of set of microsatellites for the Grey Partridge (Perdix perdix). I succeeded in isolation of seven new specific microsatellites. Another microsatellite markers were passed from close relative galliform species (Galliformes). On the whole I gained 18 microsatellite loci which were used for study of population charakteristics of three partridge populations from Stodůlky, Písecko and Milešín. The analysis showed conspicuous structuredness of these populations and surprisingly low values (less then 100) of their effective population sizes. Seven of the microsatellites were chosen for analysis of paternity. Indeed I found the evidence of extrapair paternity in this putatively monogamous bird. Finally I conclude, on the basis of sequenation of mitochondrial control region that our populations belong to the western linage of mitochondrial DNA.
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Development of Grey Partridge (Perdix perdix) microsatellite markers
Vaněčková, Dominika ; Munclinger, Pavel (advisor) ; Burri, Marta (referee)
The aim of this work was the construction of set of microsatellites for the Grey Partridge (Perdix perdix). I succeeded in isolation of seven new specific microsatellites. Another microsatellite markers were passed from close relative galliform species (Galliformes). On the whole I gained 18 microsatellite loci which were used for study of population charakteristics of three partridge populations from Stodůlky, Písecko and Milešín. The analysis showed conspicuous structuredness of these populations and surprisingly low values (less then 100) of their effective population sizes. Seven of the microsatellites were chosen for analysis of paternity. Indeed I found the evidence of extrapair paternity in this putatively monogamous bird. Finally I conclude, on the basis of sequenation of mitochondrial control region that our populations belong to the western linage of mitochondrial DNA.
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Effects of olfaction and visual stimuli on mate choice decisions in Grey Partridges
Kotasová, Kateřina ; Albrecht, Tomáš (advisor) ; Sedláček, Ondřej (referee)
This theses focuses on olfactory and visual components of mate choice in grey partridge. The aim is to evaluate the importance of melanin-based ornametnation and olfaction in mate choice and to explain the role of sexual selection in the evolution of secondary ornamentation in this socially monogamous galliform bird. To do that several experiments were conducted to (1) assess the ability of individuals to recognize conspecific odour and (2) to estimate the significance of melanin based feather ornamentation in male-male and male-female interactions. In some experiments I manipulated the expression (size) of feather maleanin- based ornamentation while in others I used birds forced to pair randomly to find out how the size of ornament and similarity in ornament expression between males and females (assortative pairing) affects reproductive success and investments (egg hatchability and number of eggs laid).
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Condition dependence of secondary ornamentation and mate choice in Grey Partridges
Gabrielová, Barbora ; Albrecht, Tomáš (advisor) ; Sedláček, Ondřej (referee)
This study focuses on relationships between individual condition, measures of ornament expression and mate choice in the Grey Partridge (Perdix perdix). It is based on the correlative data as well as results of manipulative experiments. I found positive correlation between the size of melanin- and carotenoid-based ornaments in partridges. The size and the redness of the carotenoid skin patch, and the size of the melanin-based feather ornamentation were associated with several measures of immunity and overall body condition (complement activity, ratio of immature erythrocytes, heterophil/leucocyte ratio, response to novel antigen). Furthermore, data from natural populations indicate that the expression of carotenoid-based ornamentation is associated with sexual attractiveness (measured as the ability to obtain a social mate) in partridges. Data from captive individuals indicate that carotenoid supplementation improves the redness of carotenoid-based ornament, while the stimulation of the immune system under increasing concentrations of supplemented carotenoids has no measurable effect on condition and physiological state. This seems to contradict predictions of the 'Carotenoid maintenance hypothesis'. Overall, results better understanding the role of carotenoid and melanin-based ornamentation in signaling...
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