Antje Girndt

Antje Girndt
Bertelsmann Stiftung · Wirksame Bildungsinvestitionen

PhD
Project Manager

About

29
Publications
5,316
Reads
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193
Citations

Publications

Publications (29)
Article
Full-text available
Offspring of older parents in many species have decreased longevity, a faster ageing rate and lower fecundity than offspring born to younger parents. Biomarkers of ageing, such as telomeres, that tend to shorten as individuals age, may provide insight into the mechanisms of such parental age effects. Parental age may be associated with offspring te...
Article
Full-text available
Die Systeme der frühkindlichen Bildung, Betreuung und Erziehung in Deutschland haben sich im vergangenen Jahrzehnt enorm weiterentwickelt. Doch noch immer kann nicht jedem Kind, für das die Eltern eine Betreuung wünschen, ein Platz in der Kindertagesbetreuung angeboten werden. Zudem sind die Rahmenbedingungen in den KiTas oftmals noch nicht kindger...
Preprint
Full-text available
Offspring of older parents in many species display decreased longevity, a faster ageing rate and lower fecundity than offspring born to younger parents. Biomarkers, such as telomeres, that tend to shorten as individual age, may provide insight into the mechanisms of parental age effects. Parental age could determine telomere length either through i...
Article
Behavioral traits are considered animal personality traits when individuals differ consistently in their expression across time and across context. Here, we test this idea on three metrics derived from social interaction networks (strength, betweenness, closeness). Using experimental data from house sparrows in captive populations, and observationa...
Article
Full-text available
Evolutionary theory predicts that females seek extra‐pair fertilisations from high‐quality males. In socially monogamous bird species, it is often old males that are most successful in extra‐pair fertilisations. Adaptive models of female extra‐pair mate choice suggest that old males may produce offspring of higher genetic quality than young males b...
Preprint
Full-text available
Behavioural traits are considered animal personality traits when individuals differ consistently in trait expression across time and context. Previous research has primarily focused on the shy-bold continuum, with research on sociability as potential proxy for animal personality traits only recently being considered. Here, we test the hypothesis th...
Preprint
Full-text available
Evolutionary theory predicts that females seek extra-pair fertilisations from high-quality males. In socially monogamous bird species, it is often old males that are most successful in extra-pair fertilisations. Adaptive models of female extra-pair mate choice suggest that old males may produce offspring of higher genetic quality than young males b...
Preprint
Full-text available
Variation in individual life histories, and physiology, determines the rates at which new life is generated (reproduction) and lost (death) in a population. Studying the demography of deaths thus reveals fundamental aspects of the biology of individuals within a population. We studied mortality senescence, the increase in mortality rate with age, i...
Article
Full-text available
The status signalling hypothesis aims to explain within-species variation in ornamentation by suggesting that some ornaments signal dominance status. Here, we use multilevel meta-analytic models to challenge the textbook example of this hypothesis, the black bib of male house sparrows (Passer domesticus). We conducted a systematic review, and obtai...
Article
Full-text available
Extra-pair paternity is the result of copulation between a female and a male other than her social partner. In socially monogamous birds, old males are most likely to sire extra-pair offspring. The male manipulation and female choice hypotheses predict that age-specific male mating behaviour could explain this old-over-young male advantage. These h...
Preprint
Full-text available
The status signalling hypothesis aims to explain conspecific variation in ornamentation by suggesting that some ornaments signal dominance status. Here, we use multilevel meta-analytic models to challenge the textbook example of this hypothesis, the black bib of house sparrows (Passer domesticus). We conducted a systematic review, and obtained raw...
Preprint
Extra-pair paternity is the result of copulation between a female and a male other than her social partner. In socially monogamous birds, old males are most likely to sire extra-pair offspring. The male manipulation and female choice hypotheses predict that age-specific male mating behaviour could explain this old-over-young male advantage. These h...
Poster
Full-text available
The status signalling hypothesis tries to explain conspecific variation in traits such as plumage ornamentation by suggesting that these traits signal dominance status. Here, we use multilevel meta-analytic (multi-regression) models to challenge the classic textbook example of this hypothesis, the house sparrow. We conducted a systematic review, an...
Poster
Full-text available
Birds are model organisms in sperm biology. Previous work in zebra finches, suggested that sperm sampled from males’ faeces and ejaculates do not differ in size. Here, we tested this assumption in a captive population of house sparrows, Passer domesticus. We compared sperm length in samples from three collection techniques: female dummy, faecal and...
Article
Full-text available
Birds are model organisms in sperm biology. Previous work in zebra finches, suggested that sperm sampled from males' faeces and ejaculates do not differ in size. Here, we tested this assumption in a captive population of house sparrows, Passer domesticus. We compared sperm length in samples from three collection techniques: female dummy, faecal and...
Data
Sperm abnormality procedures. Description of methods. (DOCX)
Article
Full-text available
Finding a high quality territory is essential for many animals to reproduce successfully. Despite its importance for fitness, we know little about the process of territory prospecting in wild birds, and whether individual traits and behaviours, such as personality, co-vary with territory prospecting. Here, we use long-term data from a wild, insular...
Article
Full-text available
Reproductive success is associated with age in many taxa, increasing in early life followed by reproductive senescence. In socially monogamous, but genetically polygamous species, this generates the interesting possibility of differential trajectories of within-pair and extra-pair siring success with age in males. We investigate these relationships...
Presentation
A dominance hierarchy is a social structure where some individuals (dominants) consistently win contests against other individuals (subordinates). Dominant individuals have priority access to resources, and supposedly higher fitness. Badges of status identify such individuals, allowing others to avoid costly fights. The black bib of male house spar...
Presentation
Dominance hierarchies are a key aspect of many animal social structures. Dominant individuals have priority access to resources, and supposedly higher fitness. Badges of status identify such individuals, allowing others to avoid costly fights. The black bib of male house sparrows has been considered a model for sexual selection and, like dominance,...
Presentation
Full-text available
Finding a good nest site is essential for birds. However, the process of nest prospecting is not well described in wild populations. Here, we use a long-term dataset to test two hypotheses regarding winter nest prospecting behaviour: (1) first-time breeders show higher winter nest prospecting behaviour than older individuals, who most likely alread...
Article
Here we report the first discovery of two viable triploid male Zebra Finches Taeniopygia guttata. We compared the morphology of their sperm with that of normal diploid Zebra Finches and examined eggs resulting from a triploid male and diploid female pairing to investigate whether triploid Zebra Finches can reproduce. The majority (78%) of the tripl...
Article
Rates of multiple paternities were investigated in the sailfin molly (Poecilia latipinna), using eight microsatellite loci. Genotyping was performed for offspring and mothers in 40 broods from four al-lopatric populations from the south-eastern U.S.A. along a geographic stretch of 1200 km in west-east direction and approximately 200 km from north t...
Article
Full-text available
Mate choice as one element of sexual selection can be sensitive to public information from neighbouring individuals. Here, we demonstrate that males of the livebearing fish Poecilia mexicana gather complex social information when given a chance to familiarize themselves with rivals prior to mate choice. Focal males ceased to show mating preferences...

Projects

Projects (4)
Project
This project contains all items related to my PhD thesis. I did my PhD at the Max Planck Institute for Ornithology (Seewiesen, GER) and Imperial College London (Silwood, UK). I successfully defended my PhD on the 18th of May 2018 at the University of Konstanz (GER). Any question, feel free to ask.
Project
Extra-pair mating has been reported in more than 80% of surveyed passerines. However, our understanding with this widespread behaviour remains limited. This project aims to test various hypotheses belonging to the adaptive and nonadaptive explanations of this behaviour in birds, mostly using house sparrows as a model system.