12 Works

Data from: The effects of dietary macronutrients on flight ability, energetics, and fuel metabolism of yellow-rumped warblers Setophaga coronata

Christopher G. Guglielmo, Alexander R. Gerson, Edwin R. Price & Quentin R. Hays
The catabolism of protein from organs and muscles during migratory flight is necessary to produce glucose, key metabolic intermediates, and water, but may have negative effects on flight range and refueling at stopovers. We tested the hypothesis, suggested by previous studies, that birds that eat high-protein insect diets use more protein for fuel in flight than those that eat high-carbohydrate fruits. First, we fed migratory yellow-rumped warblers synthetic fruit or mixed insect/fruit diets, and measured...

Data from: Contrasting patterns of selection and drift between two categories of immune genes in prairie-chickens

Zachary W. Bateson, Linda A. Whittingham, Jeff A. Johnson & Peter O. Dunn
Immune-receptor genes of the adaptive immune system, such as the major histocompatibility complex (MHC), are involved in recognizing specific pathogens and are known to have high rates of adaptive evolution, presumably as a consequence of rapid coevolution between hosts and pathogens. In contrast, many ‘mediating’ genes of the immune system do not interact directly with specific pathogens and are involved in signaling (e.g., cytokines) or controlling immune cell growth. As a consequence, we might expect...

Data from: MHC variation and blood parasites in resident and migratory populations of the common yellowthroat

Linda A. Whittingham, Peter O. Dunn, Corey R. Freeman-Gallant, Conor C. Taff & Jeff A. Johnson
Genes of the major histocompatibility complex (MHC) are a critical part of the adaptive immune response, and the most polymorphic genes in the vertebrate genome, especially in passerine birds. This diversity is thought to be influenced by exposure to pathogens which can vary in relation to numerous factors. Migratory behaviour may be a particularly important trait to consider because migratory birds are exposed to a greater number of different pathogens and parasites at both breeding...

Cellular plasticity in response to suppression of storage proteins in the Brassica napus embryo

Hardy Rolletschek, Jörg Schwender, Christina König, Kent D. Chapman, Trevor Romsdahl, Christin Lorenz, Hans-Peter Braun, Peter Denolf, Katrien Van Audenhove, Eberhard Munz, Nicolas Heinzel, Stefan Ortleb, Twan Rutten, Sean McCorkle, Taras Borysyuk, André Guendel, Hai Shi, Michiel Vander Auwermeulen, Stephane Bourot & Ljudmilla Borisjuk
The trade-off between protein and oil storage in oilseed crops has been tested here in oilseed rape (Brassica napus) by analyzing the effect of suppressing key genes encoding protein storage products (napin, cruciferin). The phenotypic outcomes were assessed using nuclear magnetic resonance and mass spectrometry imaging, microscopy, transcriptomics, proteomics, metabolomics, lipidomics, immunological assays as well as by flux balance analysis. Surprisingly, the profile of storage products was only moderately changed in RNAi transgenics. However, embryonic...

Data from: Drift and selection influence geographic variation at immune loci of prairie-chickens

Jennifer L. Bollmer, Elizabeth A. Ruder, Jeff A. Johnson, John A. Eimes & Peter O. Dunn
Previous studies of immunity in wild populations have focused primarily on genes of the major histocompatibility complex (MHC); however, studies of model species have identified additional immune-related genes that also affect fitness. In this study, we sequenced five non-MHC immune genes in six greater prairie-chicken (Tympanuchus cupido) populations that have experienced varying degrees of genetic drift as a consequence of population bottlenecks and fragmentation. We compared patterns of geographic variation at the immune genes with...

Data from: Social Reward Questionnaire—Adolescent Version and its association with callous–unemotional traits

Lucy Foulkes, Craig S. Neumann, Ruth Roberts, Eamon McCrory & Essi Viding
During adolescence, social interactions are a potent source of reward. However, no measure of social reward value exists for this age group. In this study, we adapted the adult Social Reward Questionnaire, which we had previously developed and validated, for use with adolescents. Participants aged 11–16 (n = 568; 50% male) completed the Social Reward Questionnaire—Adolescent Version (SRQ-A), alongside measures of personality traits—five-factor model (FFM) and callous–unemotional (CU) traits—for construct validity purposes. A confirmatory factor...

Data from: Specific alleles at immune genes, rather than genome-wide heterozygosity, are related to immunity and survival in the critically endangered Attwater's prairie-chicken

Zachary W. Bateson, Susan C. Hammerly, Jeff A. Johnson, Michael E. Morrow, Linda A. Whittingham & Peter O. Dunn
The negative effects of inbreeding on fitness are serious concerns for populations of endangered species. Reduced fitness has been associated with lower genome-wide heterozygosity and immune gene diversity in the wild; however, it is rare that both types of genetic measures are included in the same study. Thus, it is often unclear whether the variation in fitness is due to the general effects of inbreeding, immunity-related genes or both. Here, we tested whether genome-wide heterozygosity...

Data from: A comparison of pedigree- and genetic-based measures for identifying inbreeding depression in the critically endangered Attwater’s Prairie-chicken

Susan C. Hammerly, Michael E. Morrow & Jeff A. Johnson
The primary goal of captive breeding programs for endangered species is to prevent extinction, a component of which includes the preservation of genetic diversity and avoidance of inbreeding. This is typically accomplished by minimizing mean kinship in the population, thereby maintaining equal representation of the genetic founders used to initiate the captive population. If errors in the pedigree do exist, such an approach becomes less effective for minimizing inbreeding depression. In this study both pedigree-...

Data files from nonreciprocal acoustics in viscous environment

Hyeonu Heo, Ezekiel Walker, Yurii Zubov, Dmitrii Shymkiv, Dylan Wages, Arkadii Krokhin, Tae-Youl Choi & Arup Neogi
It is demonstrated that acoustic transmission through a phononic crystal with anisotropic solid scatterers becomes nonreciprocal if the background fluid is viscous. In an ideal (inviscid) fluid, the transmission along the direction of broken P symmetry is asymmetric. This asymmetry is compatible with reciprocity since time-reversal symmetry (T symmetry) holds. Viscous losses break T symmetry, adding a nonreciprocal contribution to the transmission coefficient. The nonreciprocal transmission spectra for a phononic crystal of metallic circular cylinders...

Data from: Contrasting evolutionary histories of MHC class I and class II loci in grouse - effects of selection and gene conversion

Piotr Minias, Zachary W. Bateson, Linda A. Whittingham, Jeff A. Johnson, Sara Oyler-McCance & Peter O. Dunn
Genes of the major histocompatibility complex (MHC) encode receptor molecules that are responsible for recognition of intra- and extra-cellular pathogens (class I and class II genes, respectively) in vertebrates. Given the different roles of class I and II MHC genes, one might expect the strength of selection to differ between these two classes. Different selective pressures may also promote different rates of gene conversion at each class. Despite these predictions, surprisingly few studies have looked...

Data from: Can't live with them, can't live without them? Balancing mating and competition in two-sex populations

Aldo Compagnoni, Kenneth Steigman & Tom E. X. Miller
Two-sex populations are usually studied through frequency-dependent models that describe how sex ratio affects mating, recruitment, and population growth. However, in two-sex populations, mating and recruitment should also be affected by density and by its interactions with sex ratio. Density may have positive effects on mating (Allee effects) but negative effects on other demographic processes. In this study, we quantified how positive and negative inter-sexual interactions balance in two-sex populations. Using a dioecious grass (Poa...

Data from: Altered embryonic development in northern bobwhite quail (Colinus virginianus) induced by pre-incubation oscillatory thermal stresses mimicking global warming predictions

Kelly S. Reyna & Warren W. Burggren
Global warming is likely to alter reproductive success of ground-nesting birds that lay eggs normally left unattended for days or even weeks before actual parental incubation, especially in already warm climates. The native North American bobwhite quail (Colinus virginianus) is such a species, and pre-incubation quail eggs may experience temperatures >45°C. Yet, almost nothing is known about embryonic survival after such high pre-incubation temperatures. Freshly laid bobwhite quail eggs were exposed during a 12 day...

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