scholarly journals Urohidrosis as an overlooked cooling mechanism in long-legged birds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Julián Cabello-Vergel ◽  
Andrea Soriano-Redondo ◽  
Auxiliadora Villegas ◽  
José A. Masero ◽  
Juan M. Sánchez Guzmán ◽  
...  
Keyword(s):  
Integrated Approach ◽  
Interspecific Variation ◽  
Body Parts ◽  
Ecological Data ◽  
Online Data ◽  
Low Wind Speed ◽  
Temperature Thresholds ◽  
Cooling Mechanism ◽  
Impact On Biodiversity

AbstractBehavioural thermoregulation could buffer the impacts of climate warming on vertebrates. Specifically, the wetting of body surfaces and the resulting evaporation of body fluids serves as a cooling mechanism in a number of vertebrates coping with heat. Storks (Ciconiidae) frequently excrete onto their legs to prevent overheating, a phenomenon known as urohidrosis. Despite the increasingly recognised role of bare and highly vascularised body parts in heat exchange, the ecological and evolutionary determinants of urohidrosis have been largely ignored. We combine urohidrosis data from a scientifically curated media repository with microclimate and ecological data to investigate the determinants of urohidrosis in all extant stork species. Our phylogenetic generalised linear mixed models show that high temperature, humidity and solar radiation, and low wind speed, promote the use of urohidrosis across species. Moreover, species that typically forage in open landscapes exhibit a more pronounced use of urohidrosis than those mainly foraging in waterbodies. Substantial interspecific variation in temperature thresholds for urohidrosis prevalence points to different species vulnerabilities to high temperatures. This integrated approach that uses online data sources and methods to model microclimates should provide insight into animal thermoregulation and improve our capacity to make accurate predictions of climate change’s impact on biodiversity.

Epigenetic Regulator Signatures in Regenerative Capacity

2019 ◽  
Vol 14 (7) ◽  
pp. 598-606
Author(s):  
Sarah Albogami
Keyword(s):  
Epigenetic Regulation ◽  
Animal Species ◽  
Current Knowledge ◽  
Regeneration Process ◽  
Body Parts ◽  
Lysine Methylation ◽  
Regenerative Capacity ◽  
Biological Phenomena ◽  
Epigenetic Regulator

Background:: Regeneration is the process by which body parts lost as a result of injury are replaced, as observed in certain animal species. The root of regenerative differences between organisms is still not very well understood; if regeneration merely recycles developmental pathways in the adult form, why can some animals regrow organs whereas others cannot? In the regulation of the regeneration process as well as other biological phenomena, epigenetics plays an essential role. Objective:: This review aims to demonstrate the role of epigenetic regulators in determining regenerative capacity. Results:: In this review, we discuss the basis of regenerative differences between organisms. In addition, we present the current knowledge on the role of epigenetic regulation in regeneration, including DNA methylation, histone modification, lysine methylation, lysine methyltransferases, and the SET1 family. Conclusion:: An improved understanding of the regeneration process and the epigenetic regulation thereof through the study of regeneration in highly regenerative species will help in the field of regenerative medicine in future.

scholarly journals The Role of Faults in Groundwater Circulation before and after Seismic Events: Insights from Tracers, Water Isotopes and Geochemistry

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1499
Author(s):  
Davide Fronzi ◽  
Francesco Mirabella ◽  
Carlo Cardellini ◽  
Stefano Caliro ◽  
Stefano Palpacelli ◽  
...  
Keyword(s):  
Preferential Flow ◽  
Central Italy ◽  
Tracer Tests ◽  
Integrated Approach ◽  
Fault System ◽  
Tectonic Structures ◽  
Fault Systems ◽  
Isotopic Analyses ◽  
Before And After

The interaction between fluids and tectonic structures such as fault systems is a much-discussed issue. Many scientific works are aimed at understanding what the role of fault systems in the displacement of deep fluids is, by investigating the interaction between the upper mantle, the lower crustal portion and the upraising of gasses carried by liquids. Many other scientific works try to explore the interaction between the recharge processes, i.e., precipitation, and the fault zones, aiming to recognize the function of the abovementioned structures and their capability to direct groundwater flow towards preferential drainage areas. Understanding the role of faults in the recharge processes of punctual and linear springs, meant as gaining streams, is a key point in hydrogeology, as it is known that faults can act either as flow barriers or as preferential flow paths. In this work an investigation of a fault system located in the Nera River catchment (Italy), based on geo-structural investigations, tracer tests, geochemical and isotopic recharge modelling, allows to identify the role of the normal fault system before and after the 2016–2017 central Italy seismic sequence (Mmax = 6.5). The outcome was achieved by an integrated approach consisting of a structural geology field work, combined with GIS-based analysis, and of a hydrogeological investigation based on artificial tracer tests and geochemical and isotopic analyses.

The Toolkit of Nationalist Populism in Contemporary Hungary: Symbols, Objects, and Modalities of Circulation

2021 ◽  
pp. 088832542095081
Author(s):  
Virág Molnár
Keyword(s):  
Political Communication ◽  
Far Right ◽  
Online Data ◽  
Everyday Objects ◽  
The People ◽  
Consumer Markets ◽  
History Of ◽  
Primary Focus ◽  
Material Circulation

This article belongs to the special cluster, “National, European, Transnational: Far-right activism in the 20th and 21st centuries”, guest edited by Agnieszka Pasieka. Research on populism attributes great significance to mapping the distinctive discursive logic of populist reasoning (e.g., the trope of pitting corrupt elites against the people). This article aims to move beyond the primary focus on discursive structures to stress the role of symbols, objects, and different modalities of circulation in the political communication of populist ideas, using the case of Hungary. By tracing the history of one of the key symbols of nationalist populism—the image of “Greater Hungary”—from its emergence in the interwar period to its present-day use, the article shows how the meanings and material forms this symbol assumed in political communication that evolved under different political regimes. The analysis builds on extensive archival, ethnographic, and online data to highlight how the diversity of material forms and the conduits through which this image circulated have contributed to its endurance as a key political symbol. Symbols, like the Greater Hungary image, condense complex historical narratives into a powerful sign that can be easily objectified, reproduced, and diffused. Today’s differentiated consumer markets provide convenient conduits for this kind of material circulation. These symbols carry meaning in and of themselves as signs, and once they are turned into everyday objects, they facilitate the normalization of radical politics by increasing their salience and broad visibility.

Individual differences in political aggression: The role of social integration, perceived grievances and low self-control

2018 ◽  
Vol 17 (5) ◽  
pp. 603-627 ◽  
Author(s):  
Lieven J.R. Pauwels ◽  
Vanja Ljujic ◽  
Ann De Buck
Keyword(s):  
Individual Differences ◽  
Social Integration ◽  
Structural Equation ◽  
Integrated Approach ◽  
Self Control ◽  
Content Support ◽  
Log Linear ◽  
Low Self Control ◽  
And Function

Several models have been suggested for studying (self-reported) aggression. Less frequently, these theories are empirically applied to explain individual differences in political aggression. The present study examines the role of distal, intermediate and proximate mechanisms in a net-sample of 6020 young adults. Using log-linear structural equation modelling, the independent effects of cumulative social integration, perceived personal and group injustices and low self-control are assessed. It is assumed that these factors contribute to the ‘crystallization of discontent’ by fostering religious authoritarianism, political powerlessness, support for extremist beliefs and online exposure to extremist content. Support for extremist content and online exposure to extremist content are strong predictors, and function as different routes towards political aggression. The results support an integrated approach towards the study of political aggression. Implications for future studies are discussed.

The Role of Hand Size in the Fake-Hand Illusion Paradigm

Perception ◽  
10.1068/p5853 ◽  
2007 ◽  
Vol 36 (10) ◽  
pp. 1547-1554 ◽  
Author(s):  
Francesco Pavani ◽  
Massimiliano Zampini
Keyword(s):  
Body Image ◽  
Body Schema ◽  
Body Representation ◽  
The Body ◽  
Video Image ◽  
Body Parts ◽  
Statistical Correlations ◽  
Hand Size ◽  
Visible Hand

When a hand (either real or fake) is stimulated in synchrony with our own hand concealed from view, the felt position of our own hand can be biased toward the location of the seen hand. This intriguing phenomenon relies on the brain's ability to detect statistical correlations in the multisensory inputs (ie visual, tactile, and proprioceptive), but it is also modulated by the pre-existing representation of one's own body. Nonetheless, researchers appear to have accepted the assumption that the size of the seen hand does not matter for this illusion to occur. Here we used a real-time video image of the participant's own hand to elicit the illusion, but we varied the hand size in the video image so that the seen hand was either reduced, veridical, or enlarged in comparison to the participant's own hand. The results showed that visible-hand size modulated the illusion, which was present for veridical and enlarged images of the hand, but absent when the visible hand was reduced. These findings indicate that very specific aspects of our own body image (ie hand size) can constrain the multisensory modulation of the body schema highlighted by the fake-hand illusion paradigm. In addition, they suggest an asymmetric tendency to acknowledge enlarged (but not reduced) images of body parts within our body representation.

Beyond anthropomorphism: Odissi and the botanical

2012 ◽  
Vol 4 (2) ◽  
pp. 157-165
Author(s):  
Sally Gardner
Keyword(s):  
Body Schema ◽  
Contemporary Dance ◽  
Body Parts ◽  
Bharata Natyam ◽  
Indian Dance ◽  
The Difference ◽  
Tribal Cultures ◽  
Cultural Body

Drawing on experiences that have entailed watching and learning forms of so-called ‘Indian dance’ (Bharata Natyam and Odissi), and watching Odissi dancers performing in various locations in Orissa’s ‘sacred triangle’ (Puri, Konark, Bhubaneswar), and against my own background in contemporary dance, I propose that the difference of the Odissi body is that the dancer dances with his or her feet in more than one kingdom – that is, he or she maintains a link between human bodies and the bodies of plants. Such a perception can help to displace questions of the dancer’s spatiality and representations, challenging western or westernized visions of the industrial or mechanical body, assumed hierarchies of body parts and their signifying powers, and assumptions about the role of the joints. The sense of a botanical imaginary or specific cultural body-schema at work in Odissi dance is supported by discussion of historical and ethnographic literature pertaining to the (former) female dancers of the Jagannath Temple in Puri; the temple’s links with Oriyan tribal cultures; the dancers’ traditional importance according to an axis of social auspiciousness/inauspiciousness as opposed to social purity/impurity; and the particular processes of the reconstruction of Odissi dance (separate from that of Bharata natyam) after independence.

scholarly journals Biomechanical trade-offs bias rates of evolution in the feeding apparatus of fishes

2011 ◽  
Vol 279 (1732) ◽  
pp. 1287-1292 ◽  
Author(s):  
Roi Holzman ◽  
David C. Collar ◽  
Samantha A. Price ◽  
C. Darrin Hulsey ◽  
Robert C. Thomson ◽  
...  
Keyword(s):  
Genetic Factors ◽  
Morphological Evolution ◽  
The Body ◽  
Body Parts ◽  
Phenotypic Evolution ◽  
Genetic Constraints ◽  
Functional Systems ◽  
Rates Of Evolution ◽  
Trade Offs

Morphological diversification does not proceed evenly across the organism. Some body parts tend to evolve at higher rates than others, and these rate biases are often attributed to sexual and natural selection or to genetic constraints. We hypothesized that variation in the rates of morphological evolution among body parts could also be related to the performance consequences of the functional systems that make up the body. Specifically, we tested the widely held expectation that the rate of evolution for a trait is negatively correlated with the strength of biomechanical trade-offs to which it is exposed. We quantified the magnitude of trade-offs acting on the morphological components of three feeding-related functional systems in four radiations of teleost fishes. After accounting for differences in the rates of morphological evolution between radiations, we found that traits that contribute more to performance trade-offs tend to evolve more rapidly, contrary to the prediction. While ecological and genetic factors are known to have strong effects on rates of phenotypic evolution, this study highlights the role of the biomechanical architecture of functional systems in biasing the rates and direction of trait evolution.

Body Schema and Body Image

2021 ◽  
Keyword(s):  
Body Image ◽  
Body Dysmorphic Disorder ◽  
Body Schema ◽  
The Body ◽  
Body Parts ◽  
Neural Activities ◽  
Body Shapes ◽  
Influential Book ◽  
Social And Cultural Factors

Body schema refers to the system of sensory-motor functions that enables control of the position of body parts in space, without conscious awareness of those parts. Body image refers to a conscious representation of the way the body appears—a set of conscious perceptions, affective attitudes, and beliefs pertaining to one’s own bodily image. In 2005, Shaun Gallagher published an influential book entitled ‘How the Body Shapes the Mind’. This book not only defined both body schema (BS) and body image (BI), but also explored the complicated relationship between the two. The book also established the idea that there is a double dissociation, whereby body schema and body image refer to two different, but closely related, systems. Given that many kinds of pathological cases can be described in terms of body schema and body image (phantom limbs, asomatognosia, apraxia, schizophrenia, anorexia, depersonalization, and body dysmorphic disorder, among others), we might expect to find a growing consensus about these concepts and the relevant neural activities connected to these systems. Instead, an examination of the scientific literature reveals continued ambiguity and disagreement. This volume brings together leading experts from the fields of philosophy, neuroscience, psychology, and psychiatry in a lively and productive dialogue. It explores fundamental questions about the relationship between body schema and body image, and addresses ongoing debates about the role of the brain and the role of social and cultural factors in our understanding of embodiment.

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