Bibliografie tematiche / Life trait history

Letteratura scientifica selezionata sul tema "Life trait history"

Autore: Grafiati

Pubblicato: 22 giugno 2024

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Articoli di riviste sul tema "Life trait history":

Moschilla, Joe A., Joseph L. Tomkins e Leigh W. Simmons. "Sex-specific pace-of-life syndromes". Behavioral Ecology 30, n. 4 (25 aprile 2019): 1096–105. http://dx.doi.org/10.1093/beheco/arz055.

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Abstract The pace-of-life syndrome (POLS) hypothesis considers an animal’s behavior, physiology, and life history as nonindependent components of a single integrated phenotype. However, frequent deviations from the expected correlations between POLS traits suggest that these relationships may be context, and potentially, sex dependent. To determine whether the sexes express distinct POLS trait covariance structures, we observed the behavior (mobility, latency to emerge from a shelter), physiology (mass-specific metabolic rate), and life history (life span, development time) of male and female Australian field crickets (Teleogryllus oceanicus). Path analysis modeling suggested that POLS trait covariation differed between the sexes. Although neither sex displayed the complete integration of traits predicted by the POLS hypothesis, females did display greater overall integration with a significant negative correlation between metabolic rate and risk-taking behavior but with life-history traits varying independently. In males, however, there was no clear association between traits. These results suggest that T. oceanicus do indeed display sex-specific trait covariance structures, emphasizing the importance of acknowledging sex in assessments of POLS.

Acasuso-Rivero, Cristina, Courtney J. Murren, Carl D. Schlichting e Ulrich K. Steiner. "Adaptive phenotypic plasticity for life-history and less fitness-related traits". Proceedings of the Royal Society B: Biological Sciences 286, n. 1904 (12 giugno 2019): 20190653. http://dx.doi.org/10.1098/rspb.2019.0653.

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Organisms are faced with variable environments and one of the most common solutions to cope with such variability is phenotypic plasticity, a modification of the phenotype to the environment. These modifications are commonly modelled in evolutionary theories as adaptive, influencing ecological and evolutionary processes. If plasticity is adaptive, we would predict that the closer to fitness a trait is, the less plastic it would be. To test this hypothesis, we conducted a meta-analysis of 213 studies and measured the plasticity of each reported trait as a coefficient of variation. Traits were categorized as closer to fitness—life-history traits including reproduction and survival related traits, and farther from fitness—non-life-history traits including traits related to development, metabolism and physiology, morphology and behaviour. Our results showed, unexpectedly, that although traits differed in their amounts of plasticity, trait plasticity was not related to its proximity to fitness. These findings were independent of taxonomic groups or environmental types assessed. We caution against general expectations that plasticity is adaptive, as assumed by many models of its evolution. More studies are needed that test the adaptive nature of plasticity, and additional theoretical explorations on adaptive and non-adaptive plasticity are encouraged.

Hairston, N. G., e W. E. Walton. "Rapid evolution of a life history trait". Proceedings of the National Academy of Sciences 83, n. 13 (1 luglio 1986): 4831–33. http://dx.doi.org/10.1073/pnas.83.13.4831.

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Kamilar, Jason M., e Natalie Cooper. "Phylogenetic signal in primate behaviour, ecology and life history". Philosophical Transactions of the Royal Society B: Biological Sciences 368, n. 1618 (19 maggio 2013): 20120341. http://dx.doi.org/10.1098/rstb.2012.0341.

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Examining biological diversity in an explicitly evolutionary context has been the subject of research for several decades, yet relatively recent advances in analytical techniques and the increasing availability of species-level phylogenies, have enabled scientists to ask new questions. One such approach is to quantify phylogenetic signal to determine how trait variation is correlated with the phylogenetic relatedness of species. When phylogenetic signal is high, closely related species exhibit similar traits, and this biological similarity decreases as the evolutionary distance between species increases. Here, we first review the concept of phylogenetic signal and suggest how to measure and interpret phylogenetic signal in species traits. Second, we quantified phylogenetic signal in primates for 31 variables, including body mass, brain size, life-history, sexual selection, social organization, diet, activity budget, ranging patterns and climatic variables. We found that phylogenetic signal varies extensively across and even within trait categories. The highest values are exhibited by brain size and body mass, moderate values are found in the degree of territoriality and canine size dimorphism, while low values are displayed by most of the remaining variables. Our results have important implications for the evolution of behaviour and ecology in primates and other vertebrates.

Devine, Jennifer A., Peter J. Wright, Heidi E. Pardoe e Mikko Heino. "Comparing rates of contemporary evolution in life-history traits for exploited fish stocks". Canadian Journal of Fisheries and Aquatic Sciences 69, n. 6 (giugno 2012): 1105–20. http://dx.doi.org/10.1139/f2012-047.

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Trait evolution over time periods spanning generations, not millennia, is increasingly observed to be above the natural baseline in populations experiencing human-induced perturbations. We investigated the relative speed of trait change by comparing rates of evolution in haldanes and darwins for size at maturation as measured by probabilistic maturation reaction norm midpoints for fish stocks from the Pacific Ocean, North Atlantic, Barents Sea, eastern Baltic Sea, and the North Sea. Rates in haldanes for 23 stocks ranged from –2.2 to 0.9 and from 0.5 to 153 in kilodarwins for 26 stocks. The highest rates of evolution corresponded to the most heavily exploited stocks; rates slowed after moratoria were introduced. The estimated rates in fish life-history characteristics were comparable to other examples of human-induced evolution and faster than naturally induced rates. Stocks with high growth showed slower evolutionary change, even under high mortality, suggesting that compensatory somatic growth can slow the rate of trait evolution. Regardless of whether trait changes are due to exploitation or environmental factors, the costs of ignoring trait evolution are high. Management strategies should be based upon precautionary principles; therefore, the effect of changing traits must be integrated into the fisheries assessment process.

Tabilio Di Camillo, Agostina, Diana Maria Paola Galassi, Barbara Fiasca, Mattia Di Cicco, Emma Galmarini, Ilaria Vaccarelli e Tiziana Di Lorenzo. "Variation in Copepod Morphological and Life History Traits along a Vertical Gradient of Freshwater Habitats". Environments 10, n. 12 (22 novembre 2023): 199. http://dx.doi.org/10.3390/environments10120199.

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Understanding trait selection factors is vital for decoding the processes shaping species’ assemblages. However, trait-based studies in freshwater crustacean copepod assemblages are scarce, especially in groundwater environments. We explored how environmental filtering influences functional traits in copepod assemblages across four freshwater habitats (an alluvial aquifer, a hyporheic zone, a stream benthic zone and a lake littoral) along a depth gradient. Each habitat had distinct environmental templates based on light, temperature and dissolved oxygen. We analysed 4898 individuals from 43 copepod species and examined 12 morphological and life history traits. The results revealed significant differences in copepod traits among habitats, notably in ovigerous female biomass, egg biomass and ovigerous female percentages. Furthermore, despite some statistical uncertainty, notable differences were also observed in the number of juveniles, male-to-female abundance ratios and overall biomass. No significant differences were observed in juvenile biomass, egg characteristics, body size dimorphism or juvenile-to-adult ratios among habitats. The trait variations offer insights into copepod-mediated ecosystem services, particularly carbon recycling. To gain a deeper understanding of copepod adaptations to environmental features and anthropogenic changes, future research should consider additional functional traits, such as locomotion and feeding habits.

Henle, Klaus, Annegret Grimm, Ana María Prieto Ramírez, Sylvain Moulherat e Julie Reynaud. "Life-history trait database of European reptile species". Nature Conservation 9 (19 dicembre 2014): 45–67. http://dx.doi.org/10.3897/natureconservation.9.8908.

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Coelho de Souza, Fernanda, Kyle G. Dexter, Oliver L. Phillips, Roel J. W. Brienen, Jerome Chave, David R. Galbraith, Gabriela Lopez Gonzalez et al. "Evolutionary heritage influences Amazon tree ecology". Proceedings of the Royal Society B: Biological Sciences 283, n. 1844 (14 dicembre 2016): 20161587. http://dx.doi.org/10.1098/rspb.2016.1587.

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Lineages tend to retain ecological characteristics of their ancestors through time. However, for some traits, selection during evolutionary history may have also played a role in determining trait values. To address the relative importance of these processes requires large-scale quantification of traits and evolutionary relationships among species. The Amazonian tree flora comprises a high diversity of angiosperm lineages and species with widely differing life-history characteristics, providing an excellent system to investigate the combined influences of evolutionary heritage and selection in determining trait variation. We used trait data related to the major axes of life-history variation among tropical trees (e.g. growth and mortality rates) from 577 inventory plots in closed-canopy forest, mapped onto a phylogenetic hypothesis spanning more than 300 genera including all major angiosperm clades to test for evolutionary constraints on traits. We found significant phylogenetic signal (PS) for all traits, consistent with evolutionarily related genera having more similar characteristics than expected by chance. Although there is also evidence for repeated evolution of pioneer and shade tolerant life-history strategies within independent lineages, the existence of significant PS allows clearer predictions of the links between evolutionary diversity, ecosystem function and the response of tropical forests to global change.

Maliet, Odile, Deborah E. Shelton e Richard E. Michod. "A model for the origin of group reproduction during the evolutionary transition to multicellularity". Biology Letters 11, n. 6 (giugno 2015): 20150157. http://dx.doi.org/10.1098/rsbl.2015.0157.

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During the evolution of multicellular organisms, the unit of selection and adaptation, the individual, changes from the single cell to the multicellular group. To become individuals, groups must evolve a group life cycle in which groups reproduce other groups. Investigations into the origin of group reproduction have faced a chicken-and-egg problem: traits related to reproduction at the group level often appear both to be a result of and a prerequisite for natural selection at the group level. With a focus on volvocine algae, we model the basic elements of the cell cycle and show how group reproduction can emerge through the coevolution of a life-history trait with a trait underpinning cell cycle change. Our model explains how events in the cell cycle become reordered to create a group life cycle through continuous change in the cell cycle trait, but only if the cell cycle trait can coevolve with the life-history trait. Explaining the origin of group reproduction helps us understand one of life's most familiar, yet fundamental, aspects—its hierarchical structure.

Duplouy, Anne, Swee C. Wong, Jukka Corander, Rainer Lehtonen e Ilkka Hanski. "Genetic effects on life-history traits in the Glanville fritillary butterfly". PeerJ 5 (25 maggio 2017): e3371. http://dx.doi.org/10.7717/peerj.3371.

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Background Adaptation to local habitat conditions may lead to the natural divergence of populations in life-history traits such as body size, time of reproduction, mate signaling or dispersal capacity. Given enough time and strong enough selection pressures, populations may experience local genetic differentiation. The genetic basis of many life-history traits, and their evolution according to different environmental conditions remain however poorly understood. Methods We conducted an association study on the Glanville fritillary butterfly, using material from five populations along a latitudinal gradient within the Baltic Sea region, which show different degrees of habitat fragmentation. We investigated variation in 10 principal components, cofounding in total 21 life-history traits, according to two environmental types, and 33 genetic SNP markers from 15 candidate genes. Results We found that nine SNPs from five genes showed strong trend for trait associations (p-values under 0.001 before correction). These associations, yet non-significant after multiple test corrections, with a total number of 1,086 tests, were consistent across the study populations. Additionally, these nine genes also showed an allele frequency difference between the populations from the northern fragmented versus the southern continuous landscape. Discussion Our study provides further support for previously described trait associations within the Glanville fritillary butterfly species across different spatial scales. Although our results alone are inconclusive, they are concordant with previous studies that identified these associations to be related to climatic changes or habitat fragmentation within the Åland population.

Più fonti

Tesi sul tema "Life trait history":

Larkin, Katelyn. "Effects of polyploidy and reproductive mode on life history trait expression". Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1673.

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Although genomes are perhaps the single most important element of living systems, why they feature such striking variation and how this variation is maintained within and across natural populations remains unclear. One of the most common and important means by which genomic variation is generated is ploidy elevation. While polyploidy has been implicated in the remarkably successful radiations of angiosperms, teleost fish, and amphibians, the phenotypic consequences of changes in ploidy level are poorly understood, especially in animals. I use a large, multi-year common garden experiment to identify potential life history costs and benefits of polyploidy and asexual reproduction, a trait often associated with polyploidy, in Potamopyrgus antipodarum. This snail is well suited for studying ploidy variation and sex because diploid sexuals and triploid and tetraploid asexuals frequently coexist, allowing us to use comparisons of sexuals to asexuals and triploid to tetraploid asexuals to study both the effects of ploidy elevation and sex. I detected a strong negative correlation between growth rate and time to maturity and found that sexual P. antipodarum grew and matured significantly more slowly than the polyploid asexuals. Sexual P. antipodarum were also more likely to die before achieving reproductive maturity than their asexual counterparts. By contrast, there were no apparent life history differences between triploid and tetraploid asexuals, indicating that direct phenotypic benefits of ploidy elevation are unlikely to explain the relatively rapid growth and maturation of asexuals. My results suggest that ploidy elevation does not inevitably confer phenotypic consequences, that reproductive mode influences life history trait expression, and that sexual P. antipodarum persist in many natural populations in spite of substantial life history disadvantages.

Barthold, Julia A. "A demographic perspective on trait heritability and sex differences in life history". Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:94f04aac-182f-466b-a267-179d68db398f.

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Biologists have long used demographic approaches to answer questions in ecology and evolution. The utility of these approaches has meant a constant development and refinement of methods. A key milestone has been the development of phenotype structured population models that link ecology and evolution. Moreover, biostatistical research steadily improves methods to coax demographic information from scarce data. In this thesis, I build upon some of the recent advances in the field. My first three studies focus on the consequences of sex differences in life history for population dynamics. Firstly, I test whether males matter for the dynamics of African lion (Panthera leo) populations via a previously unquantified mechanism: the inheritance of phenotype from father to offspring. Secondly, I develop a method to estimate age-specific mortality rates for both sexes in species where one of the sexes disperses around the age of maturity. Thirdly, I apply this method to study variation in mortality between the sexes and between two populations of African lions. After these three chapters, which make contributions to the field of sex-structured population dynamics, I focus on the integration of phenotype structured modelling and quantitative genetics. I illustrate how heritability of a quantitative character that develops with age depends on (i) viability selection, (ii) fertility selection, (iii) the development of the phenotype with age, and (iv) phenotype inheritance from parents to offspring. Our results question the adequacy of quantitative genetics methods to obtain unbiased estimates of heritability for wild populations. This thesis advances our understanding of population development over ecological time scales. This knowledge has applications in conservation and population management, but also contributes to untangling evolutionary processes in wild animals.

Cox, Daniel T. C. "Seasonal mass variation as a life history trait in West African savannah birds". Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3581.

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Seasonality influences life history through its effect on the availability of essential resources, with birds timing breeding to occur during peak food availability. Due to density-dependence, investment in breeding is determined largely by the seasonality of food availability, with an increased investment being traded-off against adult survival. A bird's mass acts as an index of a species' foraging environment, because a bird bases its foraging decisions on a trade-off between the risk of predation and the risk of starvation. Under constant predation risk a bird increases its mass as insurance against increased foraging unpredictability. In tropical savannahs day length and temperature remains relatively constant, and there is not a season of increased density-dependent mortality which acts across all species. Thus species have evolved a broad range of life history traits under the same environmental conditions, although how a species experiences seasonality depends largely on its foraging niche. This thesis shows that most savannah species varied their mass across the year, having a reduced mass in the non-breeding season which suggests that foraging remained predictable. Independent of gonad or egg growth they then increased their mass as they started to breed, with the timing of breeding coinciding with peak food availability. Across species in the same foraging niche mass acts as an index of breeding investment, with females increasing their mass more than males. While across species in different foraging niches an increased mass response was associated with higher adult survival, probably because breeding strategy and subsequently adult survival are governed by food limitation. This thesis shows that birds adaptively manage their mass during breeding and that mass is not a result of energetic stress, thus under constant predation risk a bird's mass is a result of foraging predictability as a function of competition for available food and investment in breeding.

Armstrong, Jenny. "The genetic architecture of a reproductive life-history trait in a wild passerine". Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/11913/.

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Understanding the capacity for species to respond to changes in their environment and the rate at which they are able to do so is a key topic in evolutionary biology and of increasing importance in wildlife conservation and management. However the mechanisms involved in mediating these responses are poorly understood. Specifically, while reactive responses may be advantageous in the short term persistent directional changes in environmental conditions may require a more profound response in order for organisms to adapt and persist successfully. Here I use data from two long-term studies of the great tit Parus major and apply a range of statistical techniques to dissect the genetic architecture of laying date, a reproductive life-history trait, to discern the extent to which a genetic component of variation contributes to observed phenotypic variation. A heritable component of variation exists in both populations, but specific regions of the genome contributing to trait variation could not be detected by quantitative trait loci mapping (Chapters 2 & 3), genome-wide association (Chapters 2 & 3) or chromosome partitioning (Chapter 4) analyses. These findings are consistent with a highly polygenic basis for variation in laying date, variation maintained by many genes of small effect. Attempts to increase the statistical power by combining two phenotypic datasets to increase overall sample size (Chapter 3) and increasing marker density (Chapter 5) drew similar conclusions, with an absence of genome-wide significant QTL. Despite evidence of a strong association on chromosome 3 (Chapter 5), an overall lack of consistency between analyses and datasets on regions exhibiting the highest associations suggests that power to detect genomic regions, particularly when variation may be determined by many variants of small effect, is low. I conclude that while genetic variation exists, environmental factors and phenotypic plasticity likely account for much of the variation in laying date.

Pecoraro, Carlo <1986&gt. "Global Population Genomic Structure and Life History Trait Analysis of Yellowfin Tuna (Thunnus Albacares)". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7537/1/Pecoraro_Carlo_tesi.pdf.

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Yellowfin tuna (Thunnus albacares; YFT) represents one of the most important seafood commodities in the world. The rationale of this Ph.D. project was identified by prioritizing key issues as objectives for contributing to the conservation of YFT and helping to develop a more realistic stock assessment and sustainable management of this species. Specifically, in this work the current mismatch between the biology and/or ecology and the realized management strategies was highlighted, putting particular emphasis on YFT population structure, which is currently characterized by a high degree of uncertainty at both local and global scale. This general pattern was confirmed by the results obtained using a panel of microsatellite loci, which cannot reject the null hypothesis of the existence of only one panmictic population at the global scale. On the contrary, the access to more powerful and cost effective genetic tools would represent the first step for resolving YFT population structure at both global and local scale. After having evaluated the efficiency and usefulness of 2b-RAD genotyping technique for investigating population genetic structure in highly migratory fish species, a panel of 972 SNPs (Single Nucleotide Polymorphisms) was generated. Using this panel, three distinct populations were identified in the Atlantic, Indian and Pacific Oceans. Additionally, it was possible to define a subset of 33 outlier loci putatively under selection to delineate and separate sub-populations within both the Atlantic and the Pacific Oceans (following an east-west division). Finally, it was emphasized for the first time that in the Atlantic Ocean larger YFT females allocate a greater fraction of surplus energy to egg production than smaller ones, improving noticeably the spawning quality. This result sheds light on the important contribution that larger and most experienced spawners have for the YFT productivity.

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Cheynel, Louise. "Age-specific relationships between immunity and life-history traits in a wild mammal". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1273/document.

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Face à la menace des pathogènes présents dans l’environnement, l’immunité représente une fonction cruciale pour la survie des organismes. Cependant, cette fonction représente divers coûts de développement et d’utilisation, et le caractère limité des ressources dans l’environnement impose des compromis d’allocation entre différentes fonctions (immunité, croissance, reproduction). Sur le long-terme, ces choix peuvent avoir de lourdes conséquences sur les probabilités de se reproduire et de survivre à chaque âge. L’objectif de cette thèse a été de décrire les variations avec l’âge du phénotype immunitaire d’un mammifère longévif, le chevreuil (Capreolus capreolus) et de mieux comprendre les compromis régissant l’allocation de ressources entre l’immunité et les autres grandes fonctions de l’organisme. Cette thèse a été menée au sein de deux populations naturelles, permettant de tester l’influence de conditions environnementales contrastées sur ces variations. Nous avons montré qu’une croissance rapide pendant les premiers mois de vie du chevreuil n’imposait pas de coûts en terme de développement du phénotype immunitaire sur la même période (niveaux des traits innés et acquis), ni sur le long-terme. Nous avons aussi montré que le développement de l’immunité des jeunes n’était pas dépendant de l’âge de leur mère, mais était fortement influencé par la condition corporelle de celle-ci. Chez les adultes, nous avons décrit les variations avec l’âge d’une dizaine de traits reflétant l’immunité innée et adaptative. Cela a permis de mettre en évidence de profondes modifications du profil immunitaire aux âges avancés, i.e. une augmentation de la production de marqueurs inflammatoires (haptoglobine, beta-globulines) et une diminution de la réponse adaptative (lymphocytes). L’augmentation parallèle avec l’âge de la charge parasitaire des individus appuie l’idée que le chevreuil est sujet à l’immunosenescence. Enfin, nous avons montré que la longueur des télomères leucocytaires varie avec l’âge. Nous n’avons pas trouvé d’associations entre la longueur des télomères et les proportions de chaque forme leucocytaire (neutrophiles, monocytes, lymphocytes). Cependant, nous avons montré que de forts niveaux de certains marqueurs inflammatoires (beta- et alpha1-globulines) semblent être associés à des télomères courts dans les cellules immunitaires. Ces résultats ouvrent de nombreuses pistes pour une meilleure compréhension des mécanismes physiologiques à la base du vieillissement
Immunity determines an organism’s sensitivity to pathogens and parasites and thus represent a crucial function that affects survival of individuals in the wild. However, this function represents several energy costs for development and use, and in natural conditions, resources are limited. Organisms consequently face energy allocation trade-offs between costly functions such as immunity, growth or reproduction. On the long term, these allocations are supposed to have serious consequences on probability of individuals to reproduce and to survive at each age.The aim of this thesis was to describe age-related variations of immune phenotype in a wild and long-lived mammal, the roe deer (Capreolus capreolus), and to provide a better understanding of energy trade-offs between immune function and other life-history traits. This thesis was conducted in roe deer of both sexes and from two natural populations, which allow to test the influence of sex and contrasting environmental conditions on these variations.We first described that rapid growth did not impair the development of young roe deer immune phenotype (levels of innate and adaptive traits), neither on the short-term (during growth), neither on the long-term (during adulthood). We also proved that immune development of juveniles was not dependent of maternal age, but was strongly influenced by maternal body condition. In adult roe deer, we have described the precise patterns of age-related changes in ten immune traits reflecting both innate and adaptive immunity. It revealed that roe deer are subjected to profound changes in their immune profile with increasing age, i.e. an increase in the production of inflammatory markers (haptoglobin, beta-globulin) and a decrease in the adaptive response (lymphocytes). In the same individuals, the parallel increase with age of parasite load supports the idea that deer are subject to immunosenescence. Finally, we described age-related changes in leukocyte telomere length. We found no associations between telomere length and proportions of each leukocyte form (neutrophils, monocytes, lymphocytes). However, we observed that high levels of some inflammatory markers (beta- and alpha1-globulin) tend to be associated with short telomeres in immune cells. These results open many avenues for a better understanding of the physiological mechanisms underlying aging

Orsucci, Marion. "Rôle de la spécialisation à la plante hôte et de l'isolement reproducteur dans la divergence de lépidoptères ravageurs de cultures". Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS074/document.

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La spécialisation à différents environnements est un moteur de divergence entre populations et espèces. Les insectes phytophages sont des candidats pertinents pour l’étude de la spéciation par spécialisation écologique, de par leur relation intime à leur plante hôte et à l’occurrence régulière de changements d’hôtes au cours de leur évolution. Cette spéciation écologique nécessite trois composantes : une source de sélection divergente, un isolement reproducteur (pré-ou post-zygotique), et un mécanisme liant les gènes sous sélection et ceux responsable de l’isolement reproducteur. Dans ce cadre, nous avons étudié l’isolement reproducteur et la spécialisation chez deux modèles de lépidoptères polyphages, ravageurs des cultures : (1) la pyrale du maïs, Ostrinia nubilalis, et son espèce sœur, Ostrinia scapulalis, (2) la légionnaire d’automne, Spodoptera frugiperda, dont deux variants sont identifiables, le variant riz (sf-R) et le variant maïs (sf-M). Ces deux modèles montrent des patrons de diversification via la plante hôte : les deux espèces sœurs et les deux variants sont différenciés génétiquement et sont spécialisés sur différentes plantes hôtes (maïs pour O. nubilalis et sf-M ; armoise pour O. scapulalis ; riz pour sf-R). Nous avons étudié les patrons de spécialisation de ces modèles en effectuant des mesures de traits d’histoire de vie à deux moments clés de leur cycle de vie : (1) au stade larvaire, par des expériences de transplantation réciproque, (2) au stade adulte, par des expérience de choix d’oviposition. Ces mesures nous ont permis de mettre en évidence un patron de spécialisation pour les deux espèces de pyrale et pour le variant sf-M au stade adulte et/ou larvaire, alors que les résultats ne montre pas de spécialisation claire pour le variant sf-R de S. frugiperda, du moins sur les plantes testées. Nous avons également recherché des mécanismes de cette spécialisation par une analyse transcriptomique visant à identifier les gènes ou familles de gènes dont l’expression varie en fonction de la plante hôte chez nos deux modèles. Cette étude mécanistique a mis en lumière des fonctions de gènes impliquées dans la détoxification, la digestion et l’immunité qui peuvent expliquer les différences de traits d’histoire de vie que nous avons observés. Enfin, nous avons quantifié différentes barrières (pré- et post-zygotiques) pour estimer le degré de divergence et les facteurs impliqués dans l’isolement reproducteur des entités génétiques étudiées. Nous avons notamment trouvé pour les deux modèles des barrières post-zygotiques précoces avec un pourcentage d’éclosion plus faible dans les croisements interspécifiques. Dans le modèle Ostrinia, nous avons également mis en évidence la présence d’une barrière pré-zygotique en lien avec le bouquet phéromonal émis par les femelles
Specialization in different environments is a driver of divergence between populations and species. Phytophagous insects are interesting candidates to study the speciation process via the ecological specialization, due to the intimate relationship between the insects and their host plant but also the regular occurrence of host changes they experienced during evolution. Ecological speciation requires three important components: a source of divergent selection, a form of reproductive isolation either pre- or post-zygotic, and a mechanism linking the genes under selection to those responsible of the reproductive isolation. In this context, we studied the reproductive isolation and specialization in two models polyphagous lepidopteran pests: (1) the European corn borer, Ostrinia nubilalis, and the closely related species Ostrinia scapulalis, (2) two host races of Spodoptera frugiperda (the fall armyworm), rice strain (sf-R) and corn strain (sf-M). Both models showed a patterns of diversification via the host plant: both species sisters and the two strains are genetically differentiated and are specialized on different host plants (maize for O. nubilalis and sf-M; mugwort for O. scapulalis; rice sf-R). We studied the patterns of specialization of these models by quantification of life history traits in two time points of their life-cycles: (1) in the larval instar, by reciprocal transplant experiments, (2) in the adult, by choice oviposition experiment. These measures highlighted a pattern of specialization at the adult and/or larval instar for both moth species and sf-M. However, the results showed no clear specialization for sf-R of S. frugiperda on the tested plants. We investigated the mechanisms of specialization by RNA-seq in order to identify the genes or the gene families for which variation of their expression depends on the host plant. This mechanistic study revealed genes involved in detoxification, digestion and immunity process that may explain the differences observed in life history traits. Finally, we quantified various barriers (pre- and post-zygotic) to estimate the divergence degree and the causes involved in reproductive isolation of genetic entities studied. In particular, for the two models, we found evidences of post-zygotic barriers with a lower percentage of hatching in the interspecific crosses. In Ostrinia model, we have also demonstrated the presence of pre-zygotic barrier depending of the pheromone blend emitted by the females

Rattiste, Kalev. "Life History of the Common Gull (Larus canus) : A Long-Term Individual-Based Study". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis (AUU), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7350.

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Orsucci, Marion. "Rôle de la spécialisation à la plante hôte et de l'isolement reproducteur dans la divergence de lépidoptères ravageurs de cultures". Electronic Thesis or Diss., Montpellier, 2015. http://www.theses.fr/2015MONTS074.

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Libri sul tema "Life trait history":

Bruni, Luigino, e Barbara Sena. The charismatic principle in social life. New York: Routledge, 2012.

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Italienisch-Deutsches Zentrum für Vergleichende Ordensgeschichte. Internationaler Kongress. Charisma und religiöse Gemeinschaften im Mittelalter: Akten des 3. Internationalen Kongresses des "Italienisch-deutschen Zentrums für Vergleichende Ordensgeschichte" in Verbindung mit Projekt C "Institutionelle Strukturen religiöser Orden im Mittelalter" und Projekt W "Stadtkultur und Klosterkultur in der mittelalterlichen Lombardei. Institutionelle Wechselwirkung zweier politischer und sozialer Felder" des Sonderforschungsbereichs 537 "Institutionalität und Geschichtlichkeit" (Dresden, 10.-12. Juni 2004). Münster: Lit, 2005.

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1944-, Silbereisen R. K., e Pinquart Martin 1960-, a cura di. Individuum und sozialer Wandel: Eine Studie zu Anforderungen, psychosozialen Ressourcen und individueller Bewältigung. Weinheim: Juventa Verlag, 2008.

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Fu, Ping. Bend, not break: A life in two worlds. London: Portfolio Penguin, 2013.

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Fu, Ping. Bend, not break: A life in two worlds. New York: Portfolio/Penguin, 2012.

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Fu, Ping. Bend, not break: A life in two worlds. New York: Portfolio/ Penguin, 2013.

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Knott, Sarah. Sensibility and the American Revolution. Chapel Hill: Published for the Omohundro Institute of Early American History and Culture, Williamsburg, Virginia, by the University of North Carolina Press, 2008.

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Jean-Pierre, Kintz, Livet Georges e Université des sciences humaines de Strasbourg., a cura di. 350e anniversaire des Traités de Westphalie, 1648-1998: Une genèse de l'Europe, une société à reconstruire : actes du colloque international tenu à l'initiative de l'Université Marc Bloch, Université des sciences humaines et de la Ville de Strasbourg, Strasbourg, Palais de l'Université, Salle Tauler, 15 au 17 octobre 1998. Strasbourg: Presses universitaires de Strasbourg, 1999.

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Thornton, Sybil Anne. Charisma and community formation in medieval Japan: The case of the Yugyō-ha (1300-1700). Ithaca, N.Y: East Asia Program, Cornell University, 1999.

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Ringelman, James K. Life history traits and management of the Gadwall. Washington, D.C: U.S. Dept. of the Interior, Fish and Wildlife Service, 1990.

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Capitoli di libri sul tema "Life trait history":

Yukawa, Junichi, e Nami Uechi. "Life History Traits". In Biology of Gall Midges, 119–49. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6534-6_6.

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Cavender-Bares, Jeannine, John A. Gamon e Philip A. Townsend. "The Use of Remote Sensing to Enhance Biodiversity Monitoring and Detection: A Critical Challenge for the Twenty-First Century". In Remote Sensing of Plant Biodiversity, 1–12. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33157-3_1.

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AbstractImproved detection and monitoring of biodiversity is critical at a time when the Earth’s biodiversity loss due to human activities is accelerating at an unprecedented rate. We face the largest loss of biodiversity in human history, a loss which has been called the “sixth mass extinction” (Leakey 1996; Kolbert 2014), given that its magnitude is in proportion to past extinction episodes in Earth history detectable from the fossil record. International efforts to conserve biodiversity (United Nations 2011) and to develop an assessment process to document changes in the status and trends of biodiversity globally through the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (Díaz et al. 2015) have raised awareness about the critical need for continuous monitoring of biodiversity at multiple spatial scales across the globe. Biodiversity itself—the variation in life found among ecosystems and organisms at any level of biological organization—cannot practically be observed everywhere. However, if habitats, functional traits, trait diversity, and the spatial turnover of plant functions can be remotely sensed, the potential exists to globally inventory the diversity of habitats and traits associated with terrestrial biodiversity. To face this challenge, there have been recent calls for a global biodiversity monitoring system (Jetz et al. 2016; Proença et al. 2017; The National Academy of Sciences 2017). A central theme of this volume is that remote sensing (RS) will play a key role in such a system.

Vinagre, Catarina, e Henrique N. Cabral. "Life-history traits in flatfishes". In Flatfishes, 83–100. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118501153.ch4.

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Woodruff, R. C. "Transposable DNA elements and life history traits". In Transposable Elements and Evolution, 218–31. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2028-9_16.

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Pommier, Cyril, Frederik Coppens, Hanna Ćwiek-Kupczyńska, Daniel Faria, Sebastian Beier, Célia Miguel, Célia Michotey, Flora D’Anna, Stuart Owen e Kristina Gruden. "Plant Science Data Integration, from Building Community Standards to Defining a Consistent Data Lifecycle". In Towards Responsible Plant Data Linkage: Data Challenges for Agricultural Research and Development, 149–60. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-13276-6_8.

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AbstractFAIR (Findable, Accessible, Interoperable, Reusable) data principles for plant research build upon experience from other life science domains such as genomics. But plant specificities, e.g. plant-environment interactions or phenotypes, require tailored solutions. Major global players have joined forces to answer that challenge with the Minimal Information About a Plant Phenotyping Experiment (MIAPPE, www.miappe.org) that handles general metadata organization and its companion web service API, the Breeding API (www.brapi.org). Both rely on two established data standards, the MultiCrop Passport Descriptors (MCPD) for identification of plant genetic resources and the Crop Ontology (www.cropontology.org) for trait documentation. Researcher communities’ coordination and collaborative approaches have enabled the success and adoption of MIAPPE and led to a general data lifecycle description by ELIXIR Plant Sciences Community to identify gaps and needed developments. A priority has been placed on addressing the “first mile” of data publishing, i.e. the gathering and documentation of data by the researcher, which enables relevant data findability and reusability. Here we describe the existing ecosystem of tools and standards for plant scientists as well as their history, including their convergence through the use of MIAPPE for describing genotyping datasets.

Hochwald, Susanne. "Plasticity of Life-History Traits in Unio crassus". In Ecology and Evolution of the Freshwater Mussels Unionoida, 127–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56869-5_7.

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Martorell, C., M. A. Toro e C. Gallego. "Spontaneous mutation for life-history traits in Drosophila melanogaster". In Mutation and Evolution, 315–24. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5210-5_25.

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Shumaker, Robert W., Serge A. Wich e Lori Perkins. "Reproductive Life History Traits of Female Orangutans (Pongo spp.)". In Primate Reproductive Aging, 147–61. Basel: KARGER, 2008. http://dx.doi.org/10.1159/000137705.

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Mazer, Susan J., e Gretchen LeBuhn. "Genetic Variation in Life-History Traits: Heritability Estimates within and Genetic Differentiation among Populations". In Life History Evolution in Plants, 85–171. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-010-9460-3_4.

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Birkeland, Charles. "Biology Trumps Management: Feedbacks and Constraints of Life-History Traits". In Coral Reefs in the Anthropocene, 231–63. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-7249-5_12.

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Atti di convegni sul tema "Life trait history":

Lagerblad de Oliveira, Pedro. "Tyrosine detoxification is an essential trait in life history of blood-feeding insects". In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.94224.

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Mariano, Lunizia Mattos, Guilherme dos Santos Sousa, Lucas Barbosa Napolitano de Moraes, Yasmim Nadime José Frigo, Ana Flavia Andrade Lemos, Arthur Oscar Schelp e Luiz Eduardo Betting. "Use of lamotrigine in impulse control and social cognition in patients with temporal lobe epilepsy". In XIV Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2023. http://dx.doi.org/10.5327/1516-3180.141s1.654.

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Temporal lobe epilepsy (TLE) is a type of focal epilepsy that can begin in one or more regions of the temporal lobe and spread to adjacent brain tissue via neural connections and can be divided into two types according to the Classification of Epileptic Syndromes (ILAE 2017). The most common is mesial temporal lobe epilepsy, which affects temporal regions such as the hippocampus, entorhinal cortex, amygdala, and parahippocampal gyrus. The second type is lateral or neocortical, where seizures occur in the temporal neocortex (superior, medial and inferior temporal, temporooccipital and temporoparietal gyri and associative senses for auditory, visual and verbal functions). Approximately 60% of patients with mesial TLE associated with hippocampal atrophy are unable to control their seizures even after optimal treatment with various antiepileptic drugs. For these patients, epilepsy surgery can be an effective alternative treatment. After a series of preoperative studies, including medical history and careful neurological examination, complex neurophysiological studies (surface, surface and invasive electroencephalographic video electroencephalogram), neuroimaging studies and neuropsychological evaluations for selected cases. Notably, according to Wiebe and Engel, 2012, surgical treatment of TLE is superior to long-term medical therapy in these selected cases. Because the pathophysiological course of mesial TLE may favor preservation of epileptogenesis even after removal of the primary regions, effective cure in these patients is not always guaranteed. Furthermore, due to the location of mesiotemporal lesions, patients with TLE suffer from stigma, associated with seizure and psychiatric disorders, which affects the quality of life and functioning of these patients. Therefore, this study aims to investigate the efficacy of using antiseizure medications, especially lamotrigine on impulse control, which is also impaired in some mood disorders. Bear Fedio Inventory (BFI) was used to study the effect of lamotrigine and other antizeiures medications on impulse control in patients with TLE. Patients with TLE confirmed by clinical semiology and magnetic resonance imaging findings treated with lamotrigine or other antiseizure medications were included. Only patients older than 18 years and younger than 60 years were investigated. Patients with psychotic symptoms were excluded from this analysis. The BFI was used and applied together with the International Personality Disorder Examination (IPDE). All participants received the questionnaires and were allowed to omit any demographic data that they felt might lead to disclosure of their identity. Ethical approval was obtained from the Ethics Committee of the Botucatu Medical School. The inventory consists of 100 items that must be marked as true or false. Each group of five statements examines one of the following areas: writing tendencies, hypermorality, religious beliefs, anger and impatience, tendency to organize or order, decreased libido, fear and anxiety, guilt, seriousness, sadness, emotion, suspicious and detail-oriented, cosmic interest, belief in personal predestination, persistence and reproducibility, hatred and revenge, addiction, euphoria, and somatization. A high score is 2 or more true items in each domain, or 20 or more items marked true in total. The IPDE, on the other hand, describes personality traits according to ICD-10 and identifies them based on a set of 5 responses with at least two being true to assume that the respondent has that trait, such as impulsivity or borderline. 36 respondents answered the questionnaires and the responses were stored and categorized into two groups, those who take lamotrigine medication and those who do not. With this separation in mind, the answers that defined the personality trait according to the inventories were selected and grouped, the answers were yes or no, and the accumulation of the answers and the score of the accumulation were applied, and the positive and negative cases for the trait were grouped so that the chi-square test could be applied. Nine of the 36 respondents were taking lamotrigine and 27 were taking other medications. For the IPED with the score of impulsivity, there were 7 positives and 2 negatives, the 27 who did not use lamotrigine, 21 with a positive score and 6 negatives. For the BFI, the Hate and Vengeance and Euphoria traits were selected for comparison and to test the hypothesis of decreased impulsivity traits. There was no change in the respondents who use lamotrigine, of the 9, only 2 had a positive score and 7 a negative score, for the non-users tested in this criterion 16 positive and 11 negative. There was not difference for hatred and revenge trail between the groups (P = 0.0543). For the euphoria trait, the values for lamotrigine users were 8 positive and 1 negative, and for non-users were 21 positive and 6 negative (P = 0.466). This preliminary investigation did not show difference for impulse control between patients taking lamotrigine or not. A larger sample size is currently underway to support this observation.

Tarone, Aaron M. "Genetic variation in blow fly life history traits". In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.94746.

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Grieco, John. "Impact of repellents on vector life history traits". In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.94918.

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Harnik, Paul G., Morgan L. Torstenson e Mario A. Williams. "ASSESSING THE EFFECTS OF ANTHROPOGENIC EUTROPHICATION USING LIVE-DEAD AGREEMENT IN MOLLUSCAN LIFE HISTORY TRAITS". In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-285798.

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van Baaren, Joan. "Ecological filters driving life-history traits in a guild of insect parasitoids". In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.108977.

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Gusarov, Y. S., A. G. Mikhailova, D. V. Iliushchenko, B. E. Efimenko, K. V. Gunbin, V. O. Burskaya e K. Y. Popadin. "MITOCHONDRIAL DNA AH > GH MUTATION AND ITS ASSOCIATIONS WITH BIRDS LIFE-HISTORY TRAITS". In OpenBio-2023. ИПЦ НГУ, 2023. http://dx.doi.org/10.25205/978-5-4437-1526-1-3.

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Mitochondria is a double-membrane organelle, which is always under pressure of reactive oxygen species. Those molecules are the main reason for Ah > Gh (h — heavy strand) mutation both in fishes [1] and mammals [2]. H

Sengupta, Sumantra. "Design of Tall Railway Bridges in North Eastern States, India". In IABSE Congress, New Delhi 2023: Engineering for Sustainable Development. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2023. http://dx.doi.org/10.2749/newdelhi.2023.1287.

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<p>Northeast Frontier railway (NFR) intends to connect Manipur, Mizoram and Nagaland with rest part of India. The railway lines pass through eastern trail of Himalaya resulting construction of large number of tunnels and bridges. The entire area is under seismic zone V. The heights of the piers vary from 20m to 141m with maximum length of bridges 700m. The configurations of the bridges were finalized taking into consideration of the parameters like span, location of the pier on the hill slope, constructability, maintainability, safety and economy. Multi modal analysis using site specific spectrum, spectrum compatible time history analysis and spatially varying time history analysis was performed to understand the behaviour of the structure under seismic and deformed shape of the continuous rail on the superstructure for safety of the train movement. Wind tunnel analysis was performed to understand the behaviour of bridge under wind force.</p>

Olson, Stephanie A. "Flesh-eating beetle (Dermestes maculatus) life history traits depend on meat type and rotting duration". In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.115025.

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Younesian, Davood, Ali Solhmirzaei, Alireza Gachloo e Ebrahim Esmailzadeh. "Random Fatigue Failure of MD36 and MD523 Bogie Frames Due to Rail Corrugations". In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-49686.

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Bogies are one of the multifunctional parts of trains which are extremely subjected to random loads. This type of oscillating and random excitation arises from irregularities of the track including rail surface corrugation, rail joints, variance in super-elevation, and also wheel imperfectness like wheel flats and unbalancy. Since most of the pre-mentioned sources have random nature, a random based theory should be applied for fatigue life estimation of the bogie frame. Two methods of fatigue life estimation are investigated in this paper. The first approach which is being implemented in time domain is based on the Damage Accumulation (DA) approach. Using Monte-Carlo simulation algorithm, the rail surface roughness is generated. Finite Element (FE) model of the bogie is subjected to the generated random excitation and the stress time history is obtained and then the fatigue life is estimated using the rain-flow method. In the second approach the fatigue life is estimated in frequency domain. Power Spectral Density (PSD) of the stress is obtained using FE model of the bogie and the fatigue life is estimated using Rayleigh technique in random fatigue theory. A comprehensive parametric study is carried out and effects of different parameters like train speeds and level of the rail irregularities on the fatigue life are investigated.

Rapporti di organizzazioni sul tema "Life trait history":

Rancans, Elmars, Jelena Vrublevska, Ilana Aleskere, Baiba Rezgale e Anna Sibalova. Mental health and associated factors in the general population of Latvia during the COVID-19 pandemic. Rīga Stradiņš University, febbraio 2021. http://dx.doi.org/10.25143/fk2/0mqsi9.

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Description The goal of the study was to assess mental health, socio-psychological and behavioural aspects in the representative sample of Latvian general population in online survey, and to identify vulnerable groups during COVID-19 pandemic and develop future recommendations. The study was carried out from 6 to 27 July 2020 and was attributable to the period of emergency state from 11 March to 10 June 2020. The protocol included demographic data and also data pertaining to general health, previous self-reported psychiatric history, symptoms of anxiety, clinically significant depression and suicidality, as well as a quality of sleep, sex, family relationships, finance, eating and exercising and religion/spirituality, and their changes during the pandemic. The Center for Epidemiologic Studies Depression scale was used to determine the presence of distress or depression, the Risk Assessment of Suicidality Scale was used to assess suicidal behaviour, current symptoms of anxiety were assessed by the State-Trait Anxiety Inventory form Y. (2021-02-04) Subject Medicine, Health and Life Sciences Keyword: COVID19, pandemic, depression, anxiety, suicidality, mental health, Latvia

Smith, Samson. Effects of Reactive Oxygen Species on Life History Traits of Caenorhabditis elegans. Portland State University Library, gennaio 2000. http://dx.doi.org/10.15760/etd.712.

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Guretzky, John A., Elizabeth R. Clark e Darlene Woodbury. Life History Traits of the Threatened Purple Amole (Chlorogalum Purpureum var. Purpureum): Fort Hunter Liggett, California. Fort Belvoir, VA: Defense Technical Information Center, novembre 2005. http://dx.doi.org/10.21236/ada467990.

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Hodnett, John, Ralph Eshelman, Nicholas Gardner e Vincent Santucci. Geology, Pleistocene paleontology, and research history of the Cumberland Bone Cave: Potomac Heritage National Scenic Trail. National Park Service, gennaio 2023. http://dx.doi.org/10.36967/2296839.

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The Cumberland Bone Cave is a public visitation stop along the Potomac Heritage National Scenic Trail renowned for its unique fossil resources that help reconstruct Appalachian middle Pleistocene life in the mid-Atlantic region of North America. This site is gated for safety and to prevent unwanted exploration and damage. Approximately 163 taxa of fossil plant and animals have been collected from Cumberland Bone Cave since 1912. Most of the fossils that have been published pertain to mammals, including many extinct or locally extirpated genera and species. Though the early excavations made by the Smithsonian Institution between 1912 and 1915 are the best known of the work at Cumberland Bone Cave, over many decades multiple institutions and paleontologists have collected and studied the fossil resources from this site up until 2012. Today, fossils from Cumberland Bone Cave are housed at various museum collections, including public displays at the National Museum of Natural History in Washington D.C. and the Allegany Museum in Cumberland, Maryland. This report summarizes the geology, fossil resources, and the history of excavation and research for Potomac Heritage Trail’s Cumberland Bone Cave.

Lorenz, Teresa J., Carol Aubry e Robin Shoal. A review of the literature on seed fate in whitebark pine and the life history traits of Clark’s nutcracker and pine squirrels. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2008. http://dx.doi.org/10.2737/pnw-gtr-742.

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Mao, Hui, YueHui Wei, Huimin Su e Xun Li. Pediatric Tui Na for cough in children: A protocol for a systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, febbraio 2022. http://dx.doi.org/10.37766/inplasy2022.2.0076.

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Abstract (sommario):

Review question / Objective: The aim of this systematic review is to evaluate the effectiveness and safety of pediatric Tui Na in the treatment of cough in children under seven years of age. Condition being studied: Cough is essentially a protective reflex of respiratory tract to various stimuli, typically in order to clear the lung airways of fluids, mucus, or other material. Cough not only has a negative impact on children’s daily activities and sleep, but is associated with parental stress and worries. Pediatric Tui Na, a therapeutic massage based on the Chinese traditional theory of Yin and Yang, Qi and blood, acupoints and meridians, enjoys a long history and has been widely applied to the treatment of common diseases like fever, diarrhea, cough and asthma. This study aims to evaluate the effectiveness and safety of pediatric Tui Na in the treatment of cough in children.