scholarly journals No evidence for sibling or parent-offspring coadaptation in a wild population of blue tits, despite high power

Evolution ◽  
2018 ◽  
Vol 73 (1) ◽  
pp. 28-41 ◽  
Author(s):  
Caroline E. Thomson ◽  
Jarrod D. Hadfield
Keyword(s):  
High Power ◽  
Wild Population ◽  
Blue Tits

Heritability of resting metabolic rate in a wild population of blue tits

2009 ◽  
Vol 22 (9) ◽  
pp. 1867-1874 ◽  
Author(s):  
J.-Å. NILSSON ◽  
M. ÅKESSON ◽  
J. F. NILSSON
Keyword(s):  
Metabolic Rate ◽  
Wild Population ◽  
Resting Metabolic Rate ◽  
Blue Tits

scholarly journals Habitat shapes diversity of gut microbiomes in a wild population of blue tits (Cyanistes caeruleus)

2021 ◽  
Author(s):  
Szymon Marian Drobniak ◽  
Magdalena Zagalska-Neubauer ◽  
Mariusz Cichoń
Keyword(s):  
Body Condition ◽  
Individual Variation ◽  
Deciduous Forest ◽  
Wild Population ◽  
Ecological Factors ◽  
Cyanistes Caeruleus ◽  
Hay Meadows ◽  
Open Forest ◽  
Ecological Feedbacks ◽  
Blue Tits

Microbiome constitutes and important axis of individual variation, affecting physiology and body condition via a number of pathways. Consequently, microbiome may be involved in ecological feedbacks, manifesting themselves as associations between microbiome characteristics and ecological factors experienced by individuals. In this study we report on the diversity and habitat dependence of microbiomes in a wild population of blue tits (Cyanistes caeruleus). Our results indicate, that birds nesting in different habitats (full-grown deciduous forest vs. open forest hay meadows) have microbiomes of different composition and microbial diversity, with birds nesting in dens forests having higher diversity of microbial species.

scholarly journals Covariance of paternity and sex with laying order explains male bias in extra-pair offspring in a wild bird population

2013 ◽  
Vol 9 (5) ◽  
pp. 20130616 ◽  
Author(s):  
Oscar Vedder ◽  
Michael J. L. Magrath ◽  
Marco van der Velde ◽  
Jan Komdeur
Keyword(s):  
Sex Ratio ◽  
Wild Population ◽  
Cyanistes Caeruleus ◽  
Offspring Sex Ratio ◽  
Bird Population ◽  
Male Bias ◽  
Laying Order ◽  
Offspring Sex ◽  
The Relationship ◽  
Blue Tits

It has been hypothesized that parents increase their fitness by biasing the sex ratio of extra-pair offspring (EPO) towards males. Here, we report a male bias among EPO in a wild population of blue tits ( Cyanistes caeruleus ). This resulted from a decline in both the proportion of males and EPO over the laying order of eggs in the clutch. However, previous studies suggest that, unlike the decline in EPO with laying order, the relationship between offspring sex ratio and laying order is not consistent between years and populations in this species. Hence, we caution against treating the decline in proportion of males with laying order, and the resulting male bias among EPO, as support for the above hypothesis. Variable patterns of offspring sex and paternity over the laying order may explain inconsistent associations between offspring sex and paternity, between and within species.

scholarly journals Selection on parental performance opposes selection for larger body mass in a wild population of blue tits

Evolution ◽  
2017 ◽  
Vol 71 (3) ◽  
pp. 716-732 ◽  
Author(s):  
Caroline E. Thomson ◽  
Florian Bayer ◽  
Nicholas Crouch ◽  
Samantha Farrell ◽  
Elizabeth Heap ◽  
...  
Keyword(s):  
Body Mass ◽  
Wild Population ◽  
Selection For ◽  
Blue Tits

scholarly journals Selection on reproductive plasticity in a wild population of blue tits, Cyanistes caeruleus

2019 ◽  
Author(s):  
Heung Ying Janet Chik ◽  
Catalina Estrada ◽  
Yiqing Wang ◽  
Priyesha Vijendra ◽  
Alex Lord ◽  
...  
Keyword(s):  
Clutch Size ◽  
Wild Population ◽  
Reaction Norm ◽  
Reaction Norms ◽  
Random Regression ◽  
Laying Date ◽  
Stabilizing Selection ◽  
Chick Survival ◽  
Cyanistes Caeruleus ◽  
Blue Tits

In the plant-insect-insectivorous-bird system, changing climates can result in mis-timing in bird reproduction, potentially impacting chick survival. To adapt to earlier prey emergence, birds can make use of phenotypic plasticity, which can be characterized by reaction norms. Despite gaining focus in research, studies on avian reproductive reaction norms as traits are scarce, particularly on laying-date-budburst-date and clutch-size-laying-date reaction norms. Here we examined the possibility of evolution of these two reaction norms from a quantitative genetics viewpoint, and tested whether 1) there is among-individual variance in reaction norms properties (intercept and slope); 2) there is selection on these reaction norm properties; and 3) variances and selection pressures differ between the two reaction norms. Data of oak (genus Quercus) budburst and blue tit (Cyanistes caeruleus) reproduction were collected from a wild population for 18 years. We used bivariate random regression models with a Bayesian approach to test for among-individual variance in reaction norm properties and their covariance with fitness. Individuals significantly differed in intercepts and slopes of both laying-date-budburst-date and clutch-size-laying-date reaction norms, and directional selection was present for an earlier laying date and a larger clutch size, but not on either plasticity. Results suggested that variation in reaction norm properties can be attributed to genetic and environmental effects, and that stabilizing selection on plasticity could be tested as a next step. This study compliments previous research on the evolution of reaction norms and helps shed light on their genetic structure, the context of their selection, and their mediation in birds.

scholarly journals Habitat shapes diversity of gut microbiomes in a wild population of blue tits Cyanistes caeruleus

2021 ◽  
Author(s):  
Szymon M. Drobniak ◽  
Mariusz Cichoń ◽  
Katarzyna Janas ◽  
Julia Barczyk ◽  
Lars Gustafsson ◽  
...  
Keyword(s):  
Wild Population ◽  
Cyanistes Caeruleus ◽  
Blue Tits

Seasonal changes in a ultraviolet structural colour signal in blue tits, Parus caeruleus

2002 ◽  
Vol 76 (2) ◽  
pp. 237-245 ◽  
Author(s):  
JONAS ORNBORG ◽  
STAFFAN ANDERSSON ◽  
SIMON C. GRIFFITH ◽  
BEN C. SHELDON
Keyword(s):  
Seasonal Changes ◽  
Parus Caeruleus ◽  
Structural Colour ◽  
Blue Tits ◽  
Colour Signal

Dynamic Modeling and Wear-Based Remaining Useful Life Prediction of High Power Clutch Systems

2005 ◽  
Vol 48 (2) ◽  
pp. 208-217 ◽  
Author(s):  
Matthew Watson ◽  
Carl Byington ◽  
Douglas Edwards ◽  
Sanket Amin
Keyword(s):  
Dynamic Modeling ◽  
High Power ◽  
Life Prediction ◽  
Remaining Useful Life ◽  
Useful Life

Less Power, Greater Conflict

2018 ◽  
Vol 49 (1) ◽  
pp. 47-62 ◽  
Author(s):  
Petra C. Schmid
Keyword(s):  
Low Power ◽  
High Power ◽  
Goal Pursuit ◽  
Goal Conflict ◽  
Personal Goals ◽  
Multiple Goals ◽  
Objective Performance ◽  
The Future ◽  
The Way

Abstract. Power facilitates goal pursuit, but how does power affect the way people respond to conflict between their multiple goals? Our results showed that higher trait power was associated with reduced experience of conflict in scenarios describing multiple goals (Study 1) and between personal goals (Study 2). Moreover, manipulated low power increased individuals’ experience of goal conflict relative to high power and a control condition (Studies 3 and 4), with the consequence that they planned to invest less into the pursuit of their goals in the future. With its focus on multiple goals and individuals’ experiences during goal pursuit rather than objective performance, the present research uses new angles to examine power effects on goal pursuit.

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