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436 results for “Longevity”
Parental breeding age effects on descendants' longevity interact over two generations in matrilines and patrilines
<p>Individuals within populations vary enormously in mortality risk and longevity, but the causes of this variation remain poorly understood. A potentially important and<br> phylogenetically widespread source of such variation is maternal age at breeding, which typically has negative effects on offspring longevity. Here, we show that paternal<br> age can affect offspring longevity as strongly as maternal age does, and that breeding age effects can interact over two generations in both matrilines and patrilines. We<br> manipulated maternal and paternal ages at breeding over two generations in the neriid fly Telostylinus angusticollis. To determine whether breeding age effects can be<br> modulated by the environment, we also manipulated larval diet and male competitive environment in the first generation. We found separate and interactive effects of<br> parental and grandparental ages at breeding on descendants' mortality rate and lifespan in both matrilines and patrilines. These breeding age effects were not<br> modulated by grandparental larval diet quality or competitive environment. Our findings suggest that variation in maternal and paternal ages at breeding could contribute<br> substantially to intra-population variation in mortality and longevity.</p>
Data from: A small badge of longevity: opposing survival selection on the size of white and black wing markings
According to handicap principle, exaggerated ornamental traits are supposed to exert costs on their bearers. However, there is much less theoretical and practical consensus about whether and under which conditions ornament expression should positively correlate with survival. We measured age-related variation and survival selection on the size of white wing patches and black wing tips in a long-lived monogamous seabird, the common gull Larus canus. Males had larger white patches than females but patch size showed concave relationship with age irrespective of sex, suggesting that white patch size was prone to senescence in both sexes. Extent of wing tip abrasion correlated negatively with the size of white patch, suggesting, in agreement with the Zahavian handicap hypothesis that only individuals with largest ornaments are able of maintaining them and not paying cost of displaying them. Areas of white wing patches and black wing tips correlated negatively. Irrespective of sex, survival selection favored birds with larger white wing patches and smaller black wing tips, which suggests that white and black wing markings may have coevolved as reverse components of a single ornament. Altogether, our results provide an evidence for the case where survival selection on ornamental traits in females is not weaker than in males. Absence of sex differences with respect to most of observed patterns is consistent with a prediction that among monogamous long-lived species with biparental care, mutual mate choice leads to evolution of elaborate ornamental traits in both sexes.
Fig. 2 in Longevity and Fecundity of Metamasius quadrilineatus Champion (Coleoptera: Dryophthoridae) on a Natural Bromeliad Host in the Laboratory
Fig. 2. Age-specific egg production by female Metamasius quadrilineatus expressed as (A) percentage of eggs produced relative to the total egg production and (B) mean number of eggs per female per week from six cages each initially containing five male and five female weevils. Vertical bars denote 1 standard error above the mean.
Fig. 3 in Longevity and Fecundity of Metamasius quadrilineatus Champion (Coleoptera: Dryophthoridae) on a Natural Bromeliad Host in the Laboratory
Fig. 3. Metamasius quadrilineatus egg hatch (viability) expressed as the mean percentage of larvae that hatched from a weekly batch of eggs from six cages initially containing five males and female weevils each. Vertical bars denote 1 standard error above the mean.
Biogeochemical evidence raises questions on the longevity of warming-induced growth enhancements in wet boreal forests
<p>Dataset comprised of nutrient content, fluxes, and stocks (C, N, and P) from soil and litterfall samples collected from terrestrial sites across the Newfoundland and Labrador Boreal Ecosystem Latidudinal Transect (NL-BELT).</p>
Plasticity in floral longevity and sex-phase duration of Lobelia siphilitica in response to simulated pollinator declines
<p><strong>Premise: </strong>Pollinator declines can reduce the quantity and quality of pollination services, resulting in less pollen deposited on flowers and lower seed production by plants. In response to these reductions, plants can increase the opportunity for pollination by plastically adjusting their floral traits, including floral longevity and sex-phase duration. However, studies of plant responses to pollinator declines have primarily focused on floral evolution across generations rather than plasticity in floral traits within a generation.</p> <p><strong>Methods:</strong> To test whether plants can respond to pollinator declines by plastically adjusting their floral traits, we simulated declines by experimentally reducing pollinator access to Lobelia siphilitica plants, and measuring floral longevity and male- and female-phase duration. We also measured daily display size and phenotypic gender to test whether plasticity in floral longevity and sex-phase duration affected inflorescence traits.</p> <p><strong>Results:</strong> We found that experimentally reducing pollination extended the male-phase duration of early-season flowers and the longevity of late-season flowers. However, plants with an extended male phase did not have a more male-biased phenotypic gender, and plants with an extended floral longevity did not have a larger daily display.</p> <p><strong>Conclusions:</strong> Our results suggest that L . siphilitica plants can respond to pollinator declines by plastically adjusting both the longevity and sex-phase duration of their flowers. Consequently, plasticity in floral traits could be one mechanism by which plants respond to decreases in pollination services caused by pollinator declines.</p>
Global analysis of floral longevity reveals latitudinal gradients and biotic and abiotic correlates
<p><span>The length of time a flower remains open and functional – floral longevity – governs important reproductive processes influencing pollination and mating and varies considerably among angiosperm species. However, little is known about large-scale biogeographic patterns and the correlates of floral longevity. </span></p> <p><span>Using published data on floral longevity from 818 angiosperm species in 134 families and 472 locations worldwide, we present the first global quantification of the latitudinal pattern of floral longevity and the relationships between floral longevity and a range of biotic and abiotic factors. </span><span>Floral longevity exhibited a significant phylogenetic signal,</span><span> and</span><span> was longer at higher latitudes in both northern and southern hemispheres, even after accounting for elevation. This latitudinal variation was associated with several biotic and abiotic variables. The mean temperature of the flowering season had the highest predictive power for floral longevity, followed by pollen number per flower. Surprisingly, compatibility status, flower size, pollination mode, and growth form had no significant effects on flower longevity.</span></p> <p><span>Our results suggest that physiological processes associated with floral maintenance play a key role in explaining latitudinal variation in floral longevity across global ecosystems, with potential implications for floral longevity under global climate change and species distributions.</span></p>
longevity and lipid data for Adalia bipunctata
<p>This dataset is supplementary material for the publication:</p> <p><strong>A floral diet increases the longevity of the coccinellid <em>Adalia bipunctata</em> but does not allow molting or reproduction</strong></p> <p>Xueqing He, Lene Sigsgaard</p>
Predicting the pro-longevity or anti-longevity effect of model organism genes with enhanced Gaussian noise augmentation-based contrastive learning on protein-protein interaction networks
<p>The datasets used to evaluate Enhanced Gaussian noise augmentation-based contrastive learning (EGsCL) against predicting the pro-longevity or anti-longevity effect of model organism gene. This repo also includes the pretrained encoders that obtained the best predictive performance for each organism (see Table 2).</p>
Data from: Only helpful when required: a longevity cost of harbouring defensive symbionts
Maternally transmitted symbionts can spread in host populations if they provide a fitness benefit to their hosts. Hamiltonella defensa, a bacterial endosymbiont of aphids, protects hosts against parasitoids but only occurs at moderate frequencies in most aphid populations. This suggests that harbouring this symbiont is also associated with costs, yet the nature of these costs has remained elusive. Here we demonstrate an important and clearly defined cost: reduced longevity. Experimental infections with six different isolates of H. defensa caused strongly reduced lifespans in two different clones of the black bean aphid, Aphis fabae, resulting in a significantly lower lifetime reproduction. However, the two aphid clones were unequally affected by the presence of H. defensa, and the magnitude of the longevity cost was further determined by genotype × genotype interactions between host and symbiont, which has important consequences for their coevolution.
Data from: Leukocyte profiles are associated with longevity and survival, but not migratory effort: a comparative analysis of shorebirds
1. Assessment of leukocyte profiles has become an increasingly popular tool in the fields of ecology and ecophysiology. The ratio of heterophils to lymphocytes (H/L ratio) is of special utility, as it reflects physiological adaptation of an organism to cope either with an infection through injury (via heterophils) or a communicable disease (via lymphocytes). Thus, elevated H/L ratios may constitute an adaptation to risky environments (i.e. associated with high risk of injury). While intra-population variation in avian H/L ratio has been extensively studied, we are aware of no studies that linked this trait to life-history components at the inter-specific level. 2. We measured H/L ratio in over 400 shorebirds from 19 species during their autumn migration through Central Europe. Phylogenetically informed comparative methods were used to test whether H/L ratio was related to: i) annual survival and lifespan; ii) migratory effort, as measured with total migration distance and migratory energy reserves; and iii) confounding variables such as body size or breeding latitude. 3. A relatively strong phylogenetic signal and spatial phylogenetic autocorrelation indicated that most diversification in shorebird H/L ratios occurred relatively early in radiation of this group. 4. Comparative analysis gave strong support for the negative associations of H/L ratio with residual lifespan and annual survival. In contrast, we found no support for the effect of migratory behaviour on H/L ratios, suggesting that leukocyte profiles in shorebirds may not constitute an important physiological adaptation for long-distance migration. 5. Our study provided the first comparative evidence for a link between H/L ratios and important life-history traits in birds. Strong negative associations with annual survival and residual lifespan indicate that leukocyte profiles may form an adaptive basis for life-history strategies in birds.
Mitonuclear interactions alter sex-specific longevity in a species without sex chromosomes
<p>Data submission accompanies a manuscript submitted to Proceedings of the Royal Society B entitled "Mitonuclear interactions alter sex-specific longevity in a species without sex chromosomes" by Flanagan, Li, and Edmands. Data files include longevity, mtDNA content, DNA damage, and sample information. All analyses are performed in a single R Markdown file.</p>
FIG. 3 in A potent anti-inflammatory response in bat macrophages may be linked to extended longevity and viral tolerance
FIG. 3. Bat-specific sites under positive selection in the investigated immune genes. Sites that had statistically significant evidence of positive selection acting across eutherian mammals were investigated for any amino acid substitutions unique to the ancestral bat lineage, the vespertilionid lineage or the pteropodid lineage. Bat lineages-specific sites are highlighted in yellow
FIG. 2 in A potent anti-inflammatory response in bat macrophages may be linked to extended longevity and viral tolerance
FIG. 2. Signatures of adaptive evolution in genes involved in sensing of viral infection and activation of antiviral/proinflammatory signalling. Genes under positive selection (site-test) in mammals are highlighted in green. Genes with sites under positive selection in bat lineages are indicated with an asterix
FIG. 1. Myotis myotis and M in A potent anti-inflammatory response in bat macrophages may be linked to extended longevity and viral tolerance
FIG. 1. Myotis myotis and M. musculus macrophages present differential response to LPS and Poly(I:C) challenge. Change in gene expression of A — IFN-β, B — IL-1β, C — TNF, D — Il-10 in response to LPS and Poly(I:C) treatment at 1, 4 and 24 hr time points are presented as changes in delta Ct values normalized to actin-β. Ratios of the fold induction of anti-inflammatory Il-10 to proinflammatory TNF (E) and Il-1β (F) are also presented. G — Literature derived Il-10/TNF ratios for other mammals. H — NO generated by stimulated M. myotis and mouse macrophages. Bars represent the mean of two experimental repeats ± SEM. Presented P -values indicate the significance of the difference between species from analysis of variance (ANOVA)
The Longevity Genes in Founder Populations Project
ClinicalTrials.gov study NCT00707694. IPD Sharing: Not stated. Countries: 1. Publications: 7.
NEUROmuscular Training for Enhanced AGE Longevity
ClinicalTrials.gov study NCT06620666. IPD Sharing: NO. Countries: 1. Publications: 0.
Multi-Modal Longevity Protocol Including Autologous Cell-Free Conditioned Media
ClinicalTrials.gov study NCT07322224. IPD Sharing: NO. Countries: 1. Publications: 0.
Follow up Study of Varapodio Trial: Effect of Longevity and Fasting Mimicking Diet on Risk Factors Age Correlated and Biomarkers of Aging
ClinicalTrials.gov study NCT07255300. IPD Sharing: Not stated. Countries: 1. Publications: 7.
Study to Evaluate Potential Decrease in Hospitalization Events, Time Between Events, and Increasing Longevity in Patients With Symptomatic Heart Failure (0954-948)
ClinicalTrials.gov study NCT00090259. IPD Sharing: NO. Countries: 0. Publications: 4.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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