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35 results for “collared flycatcher”
Fig. 2 in Temperature Dependence Of The Breeding Parametres Of The Collared Flycatcher (Passeriformes, Muscicapidae) In The National Park Homilshanski Lisy (Ne Ukraine)
Fig. 2. First spring records and first-egg day of Collared Flycatcher at investigation plots in 2006–2017.
Fig. 5 in Temperature Dependence Of The Breeding Parametres Of The Collared Flycatcher (Passeriformes, Muscicapidae) In The National Park Homilshanski Lisy (Ne Ukraine)
Fig. 5. Model-averaged coefficients of the predictor variables from the subset of best-fitting models for the clutch size (eggs).
Fig. 1 in Temperature Dependence Of The Breeding Parametres Of The Collared Flycatcher (Passeriformes, Muscicapidae) In The National Park Homilshanski Lisy (Ne Ukraine)
Fig. 1. Map of boundaries of the Collared Flycatcher subpopulation study area (Keller et al., 2020).
Fig. 3 in Temperature Dependence Of The Breeding Parametres Of The Collared Flycatcher (Passeriformes, Muscicapidae) In The National Park Homilshanski Lisy (Ne Ukraine)
Fig. 3. Model-averaged importance of the predictor variables from the subset of best-fitting models for the first egg date (FED).
Data and code from: Quantitative analyses of stochastic influences on the response to phenotypic selection in a small passerine, the collared flycatcher
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Data from: Density-dependent adaptive topography in a small passerine bird, the collared flycatcher
<p>The adaptive topography is a central concept in evolutionary biology, describing how the mean fitness of the population changes with gene frequencies or mean phenotypes. We use expected population size as quantity to be maximized by natural selection to show that selection on pairwise combinations of reproductive traits of collared flycatchers caused by fluctuations in population size generated an adaptive topography with distinct peaks often located at intermediate phenotypes. This occurred because <em>r</em>- and <em>K</em>-selection made phenotypes favored at small densities different from those with higher fitness at population sizes close to the carrying capacity <em>K</em>. The fitness decreased rapidly with a delay in the timing of egg-laying with a density-dependent effect especially occurring among early-laying females. The number of fledglings maximizing fitness was larger at small population sizes than close to <em>K</em>. Finally, there was directional selection for large fledglings independent of population size. We suggest that these patterns can be explained by increased competition for some limiting resources or access to favorable nest sites at high population densities. Thus, <em>r</em>- and <em>K</em>-selection based on expected population size as evolutionary maximization criterion may influence life history evolution and constrain the selective responses to changes in the environment.</p>
Data from: Ecological drivers and fitness consequences of incubation period in Ficedula albicollis (Collared Flycatcher): Insights from a long-term data set
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Data from: Moderate heritability and low evolvability of sperm morphology in a species with high risk of sperm competition, the collared flycatcher Ficedula albicollis
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Data from: Density-dependent adaptive topography in a small passerine bird, the collared flycatcher
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Data from: Cross-fostering eggs reveals that female collared flycatchers adjust clutch sex ratios according to parental ability to invest in offspring
Across animal taxa, reproductive success is generally more variable and more strongly dependent upon body condition for males than for females; in such cases, parents able to produce offspring in above-average condition are predicted to produce sons, whereas parents unable to produce offspring in good condition should produce daughters. We tested this hypothesis in the collared flycatcher (Ficedula albicollis) by cross-fostering eggs among nests and using the condition of foster young that parents raised to fledging as a functional measure of their ability to produce fit offspring. As predicted, females raising heavier-than-average foster fledglings with their social mate initially produced male-biased primary sex ratios, whereas those raising lighter-than-average foster fledglings produced female-biased primary sex ratios. Females also produced male-biased clutches when mated to males with large secondary sexual characters (wing patches), and tended to produce male-biased clutches earlier within breeding seasons relative to females breeding later. However, females did not adjust the sex of individuals within their clutches; sex was distributed randomly with respect to egg size, laying order, and paternity. Future research investigating the proximate mechanisms linking ecological contexts and the quality of offspring parents are able to produce with primary sex-ratio variation could provide fundamental insight into the evolution of context-dependent sex-ratio adjustment.
Data from: Sex-biased gene expression, sexual antagonism and levels of genetic diversity in the collared flycatcher (Ficedula albicollis) genome
Theoretical work suggests that sexual conflict should promote the maintenance of genetic diversity by the opposing directions of selection on males and females. If such conflict is pervasive, it could potentially lead to genomic heterogeneity in levels of genetic diversity an idea that so far has not been empirically tested on a genome-wide scale. We used large-scale population genomic and transcriptomic data from the collared flycatcher (Ficedula albicollis) to analyse how sexual conflict, for which we use sex-biased gene expression as a proxy, relates to genetic variability. Here, we demonstrate that the extent of sex-biased gene expression of both male-biased and female-biased genes is significantly correlated with levels of nucleotide diversity in gene sequences and that this correlation extends to diversity levels also in intergenic DNA and introns. We find signatures of balancing selection in sex-biased genes but also note that relaxed purifying selection could potentially explain part of the observed patterns. The finding of significant genetic differentiation between males and females for male-biased (and gonad-specific) genes indicates ongoing sexual conflict and sex-specific viability selection, potentially driven by sexual selection. Our results thus indicate that sexual antagonism could potentially be considered as one viable explanation to the long-standing question in evolutionary biology of how genomes can remain so genetically variable in face of strong natural and sexual selection.
Data from: Egg size and offspring performance in the collared flycatcher (Ficedula albicollis): a within-clutch approach
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Data from: Short- and long-term effects of egg size and feeding frequency on offspring quality in the collared flycatcher (Ficedula albicollis)
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Data from: Paternity covaries with laying and hatching order in the collared flycatcher Ficedula albicollis
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Data from: Are blue eggs a sexually selected signal of female collared flycatchers? A cross-fostering experiment
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Data from: The importance of competition for food and nest-sites in aggressive behaviour of Collared Flycatcher Ficedula albicollis
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Data from: Rearing conditions have long-term sex-specific fitness consequences in the collared flycatcher
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Data from: Optimal sperm length for high siring success depends on forehead patch size in collared flycatchers
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Data from: Whole genome resequencing of extreme phenotypes in collared flycatchers highlights the difficulty of detecting quantitative trait loci in natural populations
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Data from: Importance of infection of haemosporidia blood parasites during different life history stages for long-term reproductive fitness of collared flycatchers
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