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International audience; Circumcision as a cultural practice is a rite of passage with a nuanced symbolic and associated public status. An event, lasting days, weeks or even months, the performative elements involved are a reflection of political, cultural and social positions among the Bagisu ethnic tribe of eastern Uganda. The entire event is divided into three sections, each with a special dance; 1, Isonja, 2, Mwaga/Kadodi and, 3 Inemba dances. In this article, however, the focus is on Isonja and Inemba dances in a ritual setting and their relation to a broader community context. The article further sheds light on the notions of dance, music, and dancemusicking elements rooted in the ritual while theorizing the Imbalu circumcision process according to Arnold Van Gennep and Victor Turner's triple concepts of separation, transition, and incorporation.

International audience; By drawing on social identity and stakeholders’ theories, this paper seeks to examine how universities co-create and manage their brand image and brand reputation through tapping into internal-stakeholders’ social network. This research utilises explanatory research design at the preliminary stage, and the subsequent model is examined via a positivist survey carried out among higher education internal stakeholders in the UK. The results show that the relationship between navigation design of the website, usability of the website and customization of the website are not significant from students’ perspective, whereas all those are significant from employees’ perspective. Furthermore, the relationship between logo and co-creation behaviour is not significant from employees’ perspective while it is significant from students’ perspective. University website is the most important marketing tool to attract students and other stakeholders. Therefore, these findings have significant implications for higher education branding and marketing managers aiming to design appropriate communication tools with a view to actively engage students and employees in a co-creation process to improve their products, services and brand image.

International audience; This paper is a culmination of literature materials reviewed about nostalgia and dance movement therapy. The arguments and discussions herein try to strategically position dance as a resilient performative tool to avert or mitigate nostalgia amongst immigrants in general. It will try to discuss how most people end up in the confines of new nation-states and try to navigate contemporary ways of integration and acculturation in these new homelands. These people are normally referred to as immigrants, asylees, or refugees. Moreover, when speaking of such groups of people, the issue of nostalgia should be addressed through the lens of their disconnection, depression, and anxiety caused not only by homesickness but by the lack of acceptance in a new country.

Animal communication has long been thought to be subject to pressures and constraints associated with social relationships. However, our understanding of how the nature and quality of social relationships relates to the use and evolution of communication is limited by a lack of directly comparable methods across multiple levels of analysis. Here, we analysed observational data from 111 wild groups belonging to 26 non-human primate species, to test how vocal communication relates to dominance style (the strictness with which a dominance hierarchy is enforced, ranging from 'despotic' to 'tolerant'). At the individual-level, we found that dominant individuals who were more tolerant vocalized at a higher rate than their despotic counterparts. This indicates that tolerance within a relationship may place pressure on the dominant partner to communicate more during social interactions. At the species-level, however, despotic species exhibited a larger repertoire of hierarchy-related vocalizations than their tolerant counterparts. Findings suggest primate signals are used and evolve in tandem with the nature of interactions that characterize individuals' social relationships. Publisher PDF

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International audience; Mechanistic models suggest that individuals' memories could shape home range patterns and dynamics, and how neighbours share space. In social species, such dynamics of home range overlap may be affected by the pre-dispersal memories of immigrants. We tested this "immigrant knowledge hypothesis" in a wild population of chacma baboons (Papio ursinus). We predicted that overlap dynamics with a given neighbouring troop's home range should reflect males' adaptive interests in overlap when the alpha male had immigrated from this neighbouring troop but less so when the alpha male originated from elsewhere. We used data collected between 2005 and 2013 on two neighbouring troops in Namibia, comprising GPS records of daily ranges, male natal origins, daily females' reproductive status, and a satellite index of vegetation growth. We found support for our prediction in line with male reproductive strategies but not in line with foraging conditions. In periods with a higher relative number of fertile females over adult males in the focal troop, male baboons would benefit from reducing overlap with their neighbours to mitigate the costs of between-troop mating competition. This was indeed observed but only when the alpha male of the focal troop was an immigrant from that neighbouring troop, and not with alpha males of other origins, presumably due to their different knowledge of the neighbouring troop. Our findings highlight the role of reproductive competition in the range dynamics of social groups, and suggest that spatial segregation between groups could increase through the combination of dispersal and memory.

Orson Welles has always been associated with Shakespeare, from early stage when acting to his cinematic adaptations. Falstaff is seen as his double. With his latest film, F for Fake (1975), the Shakespearian dialogue is not so obvious. The aim of this article is to analyse this dialogue within the dialectic between truth and fake, the original and the copy. Can we read in F for Fake a homage to Falstaff, to forgers and illusionists and finally a mirror for Welles? From F for Fake to F for Falstaff, this essay film is questioning the death of the author and the power of the false. It is an artistic will to play with the differentiation between men and myths, truths and lies., Orson Welles a toujours été associé à Shakespeare, dès ses premiers pas sur scène jusqu’à ses adaptations cinématographiques. Le personnage de Falstaff est notamment appréhendé comme son double. Avec son dernier film F for Fake (1975), l’intertextualité shakespearienne semble moins évidente. Nous nous proposons pourtant d’analyser ce dialogue et la dialectique du vrai et du faux, de l’original et de la copie. Ne pourrait-on lire dans F for Fake un hommage à Falstaff, aux faussaires et autres illusionnistes, et finalement un miroir de Welles? De F for Fake à F for Falstaff, ce film-essai questionne la mort de l’auteur et les puissances du faux. Ce testament artistique s’amuse de la différenciation entre les hommes et les mythes, les vérités et les mensonges.

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The mosquito microbiota reduces the vector competence of Anopheles to Plasmodium and affects host fitness, it is therefore considered as a potential target to reduce malaria transmission. While immune induction, secretion of antimicrobials and metabolic competition are three typical mechanisms of microbiota-mediated protection against invasive pathogens in mammals, the involvement of metabolic competition or mutualism in mosquito-microbiota and microbiota-Plasmodium interactions has not been investigated. Here, we describe a metabolome analysis of the midgut of Anopheles coluzzii provided with a sugar-meal or a non-infectious blood-meal, under conventional or antibiotic-treated conditions. We observed that the antibiotic treatment affects the tricarboxylic acid cycle and nitrogen metabolism, notably resulting in decreased abundance of free amino acids. Linking our results with published data, we identified pathways which may participate in microbiota-Plasmodium interactions via metabolic interactions or immune modulation and thus would be interesting candidates for future functional studies.

Large wood is a key component of river channels that affects numerous hydrological, physical and geomorphological processes. It promotes a diversity of benthic habitats in-channel and has shown to support more abundant and diverse benthic macroinvertebrate assemblages in previous ecological studies. However, the effects of large wood on the structural and functional diversities of hyporheic invertebrates are less well studied, and simultaneous examination of these diversity metrics on hyporheic and benthic compartments of the stream bed has not been conducted previously. Therefore, this study investigates the taxonomic and functional diversities of hyporheic and benthic invertebrate assemblages around natural accumulations of large wood in a British lowland river. Taxonomic and functional diversities were partitioned (into alpha, beta, and gamma diversities) and examined in reaches with and without large wood (control). We found that functional diversity is often decoupled from taxonomic diversity, demonstrating a functional redundancy of the macroinvertebrate assemblage for both hyporheic and benthic zones. Moreover, the highest functional variability at alpha-scale was observed in large wood habitats, which suggests that taxonomic diversity is enhanced by the small-scale environmental heterogeneity around large wood. To this end, this study contributes empirical evidence of functional and structural responses of invertebrates to large wood accumulation. Such information could be used to better understand the ecological implications of restoration works in lowland rivers and guide more effective management strategies.

International audience; The chapter by Michał Izak and Monika Kostera, “King Popiel, the Killer Mice and the Story of the Post-Lie Leadership”, retells the legend of old king Popiel and the killer mice and reveals the problems of consequences of disconnecting leadership from the people and the land, while also showing a way out of the seemingly desperate situation this kind of leadership produces. They situate and relate their story to our current context as a time of uncertainty and turbulence, placed in a “Baumanian” interregnum (eroding Capitalism, disintegration of democratic and economic institutions and the eco-crisis). What they show is the importance of using imagination in order to point to natural and social roots and consequences of leadership inviting us to a creative journey to find ways of reclaiming the missing roots, or what we regard as the truth (and practice) of leadership. The morale of their story emphasizes that leadership needs to be in contact with land and people, as otherwise it and its power lose legitimization, turning into usurpation in need of constructed justifications to persevere as their retelling demonstrates revealingly.

International audience; The British series Black Mirror stirs much debate around its representation of dystopian futures of Western societies. Often grim, pessimistic and technologically-led, these representations confront the viewers with alternative societies deriving from the current use of new technologies. In each of the fourth season shown so far, multiple representations of real prisons or digital incarceration apparatus have been pictured: workers enslaved to power- generating stationary bikes in the first season, a convict imprisoned in a torture theme park in season two’s “White Bear” or digital clones trapped in a Star Trek-like simulation under the yoke of a tyrannical and sadistic captain – their real-life boss’ avatar – in season four “USS Calister”. These episodes present new forms of imprisonment, chosen or not, all linked with new media and technology.Using both semiology and visual analyses, this work aims at exploring the diverse mediated imprisonment forms proposed in Black Mirror. Drawing from Foucault’s reflections on penal systems and the biopower apparatus created by Western societies (Foucault, 1975; 1984), this chapter relies on the idea of a new panopticon, as crafted by Bentham, developed by Foucault and reused by the authors (Allard-Huver & Escurignan, 2018) to analyze the representation of the notion of ‘prison’. Indeed, in this new panopticon, mobile devices and social media serve as “disciplinary” tools to normalize people’s behavior. Black Mirror thus questions new forms of imprisonments and, paradoxically, new ways to escape or be liberated from them.Therefore, the dystopian societies depicted in Black Mirror clearly call upon our knowledge of technology: our “liberating” devices often turn into new form of servitude or are used as prisons for both the body and the mind.

International audience; Imitation, both gestural and vocal, has been acknowledged to be at the origin of human communication (Donald, 1991). Music is often considered to be the first means of communication of emotion via both vocal and gestural synchronization (Malloch, 1999; Malloch and Trevarthen, 2009). Instrumental music is part of the human heritage for more than 35,000 years before our era (Aimé et al., 2020). However, very little is known about the acquisition of gestures that produce sounds (i.e., musical gestures) and their role in the development of music and musicality. In the present paper, we propose that studying early synchronous imitation of musical gestures is essential both for investigating the development of the early action-perception system and for outlining early music interventions during infancy. We designed double musical objects which can be used in preschool music education for prompting synchronic imitation of musical gestures between adult and child, and between dyads of infants. We conclude by proposing a novel pedagogical perspective in music education for the early years which links the privileged orientation of infants and children towards sound discoveries with the development of perception-action coupling via imitation of musical gestures.

Ajuts: Project is funded by grant agreement HEALTH-F2-2010-241909 (Project EU-GEI) from the European Community Seventh Framework Programme. Additional financial support was obtained from the Institut National de la Santé et de la Recherche Médicale (recurrent funding and fellowships) and by Fondation Pierre Deniker. The study received grant 08-MNP-007 from the French government Agence Nationale de la Recherche and grant AOM-07-118 (Influence of Cannabis Psychopathological Outcome in At-risk Mental State [ICAAR study]) from the French Health Ministry Programme Hospitalier de Recherche Clinique. The Sainte-Anne Hospital Center promoted the study. Dr Kempton was supported by a Medical Research Council Fellowship grant MR/J008915/1. Dr Pantelis was supported by Australia's National Health and Medical Research Council Senior Principal Research Fellowship (ID: 628386 & 1105825) and by grant R246-2016-3237 from the Lundbeck Foundation. Dr Barrantes-Vidal was supported by the Ministerio de Ciencia, Innovación e Universidades (PSI2017-87512-C2-1-R), and the Generalitat de Catalunya (2017SGR1612 and ICREA Academia Award). Dr Modinos was supported by a Sir Henry Dale Fellowship #202397/Z/16/Z, jointly funded by The Wellcome Trust and the Royal Society. This case-control study analyzes emotion recognition and neuroimaging data as well as clinical and functional outcomes for individuals at risk for transition to psychosis and those without psychiatric or neurological disorders. Is altered emotion recognition associated with adverse clinical and functional outcomes in people at clinical high risk for psychosis? In this case-control study of 213 individuals at clinical high risk for psychosis and 52 healthy participants, abnormalities in the recognition of negative emotion at baseline were associated with neuroanatomical alterations in the medial prefrontal cortex and hippocampus and with a low level of functioning at a 12-month follow-up. This study found that, in people with high risk for developing psychosis, functional outcomes are associated with the degree to which their emotion processing is altered. The development of adverse clinical outcomes in patients with psychosis has been associated with behavioral and neuroanatomical deficits related to emotion processing. However, the association between alterations in brain regions subserving emotion processing and clinical outcomes remains unclear. To examine the association between alterations in emotion processing and regional gray matter volumes in individuals at clinical high risk (CHR) for psychosis, and the association with subsequent clinical outcomes. This naturalistic case-control study with clinical follow-up at 12 months was conducted from July 1, 2010, to August 31, 2016, and collected data from 9 psychosis early detection centers (Amsterdam, Basel, Cologne, Copenhagen, London, Melbourne, Paris, The Hague, and Vienna). Participants (213 individuals at CHR and 52 healthy controls) were enrolled in the European Network of National Schizophrenia Networks Studying Gene-Environment Interactions (EU-GEI) project. Data were analyzed from October 1, 2018, to April 24, 2019. Emotion recognition was assessed with the Degraded Facial Affect Recognition Task. Three-Tesla magnetic resonance imaging scans were acquired from all participants, and gray matter volume was measured in regions of interest (medial prefrontal cortex, amygdala, hippocampus, and insula). Clinical outcomes at 12 months were evaluated for transition to psychosis using the Comprehensive Assessment of At-Risk Mental States criteria, and the level of overall functioning was measured through the Global Assessment of Functioning [GAF] scale. A total of 213 individuals at CHR (105 women [49.3%]; mean [SD] age, 22.9 [4.7] years) and 52 healthy controls (25 women [48.1%]; mean [SD] age, 23.3 [4.0] years) were included in the study at baseline. At the follow-up within 2 years of baseline, 44 individuals at CHR (20.7%) had developed psychosis and 169 (79.3%) had not. Of the individuals at CHR reinterviewed with the GAF, 39 (30.0%) showed good overall functioning (GAF score, ≥65), whereas 91 (70.0%) had poor overall functioning (GAF score

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© 2019 The Authors. Functional Ecology © 2018 British Ecological Society Animals are expected to be judicious in the use of the energy they gain due to the costs and limits associated with its intake. The management of energy expenditure (EE) exhibited by animals has previously been considered in terms of three patterns: the constrained, independent and performance patterns of energy management. These patterns can be interpreted by regressing daily EE against maintenance EE measured over extended periods. From the multiple studies on this topic, there is equivocal evidence about the existence of universal patterns in certain aspects of energy management. The implicit assumption that animals exhibit specifically one of three discrete energy management patterns, and without variation, seems simplistic. We suggest that animals can exhibit gradations of different energy management patterns and that the exact pattern will fluctuate as their environmental context changes. To investigate these ideas, and for possible large-scale patterns in energy management, we analysed long-term heart rate data—a strong proxy for EE—across and within individuals in 16 species of birds, mammals and fish. Our analyses of 292 individuals representing 46,539 observation-days suggest that vertebrates typically exhibit predominantly the independent or performance energy patterns at the across-individual level, and that the pattern does not associate with taxonomic group. Within individuals, however, animals generally exhibit some degree of energy constraint. Together, these findings indicate that across diverse species, some individuals supply more energy to all aspects of their life than do others, however all individuals must trade-off deployment of their available energy between competing functions. This demonstrates that within-individual analyses are essential for the interpretation of energy management patterns. We also found that species do not necessarily exhibit a fixed energy management pattern but rather temporal variation in their energy management over the year. Animals’ energy management exhibited stronger energy constraint during periods of higher EE, which typically coincided with clear and key life cycle events such as reproduction, suggesting an adaptive plasticity to respond to fluctuating energy demands. A plain language summary is available for this article.

International audience; “The imagination is not a state: it is the human existence itself,” said visionary and poet William Blake more than 200 years ago. Imagination brings together existing elements into something new, yet inexistent and unthought of. It is a kind of creativity or, rather, the non-external space where creativity can take place. It involves both the mind and the feelings, body and soul, reflection and dream. Poetics is one of the modes by which imagination becomes structured and can be expressed. Organization theorist Heather Höpfl believed in the power of poetics in resisting the linearity and violence of control. Poetics is an organizing movement that subverts and undermines attempts at totalizing control. By the rejection of linearity and obsessive ordering, poetic imagination helps reclaim the desire for movement, transportation and creativity. The Greek etymology of the word metaphor suggests that adopting metaphorical thinking may help with finding new direction. In this chapter the authors adopt a poetic, rather than linear, approach to writing about organizing and organizations, and explore the power of poetry and metaphorical thinking about organizations and organizing using ideas from philosophy, their ethnographic research, organizational literature and poetry. They believe it can bring hope by helping to find new directions where systems and discourses seem to run dry or come to an end.

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Schools of fish and flocks of birds can move together in synchrony and decide on new directions of movement in a seamless way. This is possible because group members constantly share directional information with their neighbors. Although detecting the directionality of other group members is known to be important to maintain cohesion, it is not clear how many neighbors each individual can simultaneously track and pay attention to, and what the spatial distribution of these influential neighbors is. Here, we address these questions on shoals of Hemigrammus rhodostomus, a species of fish exhibiting strong schooling behavior. We adopt a data-driven analysis technique based on the study of short-term directional correlations to identify which neighbors have the strongest influence over the participation of an individual in a collective U-turn event. We find that fish mainly react to one or two neighbors at a time. Moreover, we find no correlation between the distance rank of a neighbor and its likelihood to be influential. We interpret our results in terms of fish allocating sequential and selective attention to their neighbors.

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International audience; From the Miocene Sahelanthropus tchadensis to Pleistocene Homo sapiens, hominins are characterized by a derived anterior position of the foramen magnum relative to basicranial structures. It has been previously suggested that the anterior position of the foramen magnum in hominins is related to bipedal locomotor behavior. Yet, the functional relationship between foramen magnum position and bipedal locomotion remains unclear. Recent studies, using ratios based on cranial linear measurements, have found a link between the anterior position of the foramen magnum and bipedalism in several mammalian clades: marsupials, rodents, and primates. In the present study, we compute these ratios in a sample including a more comprehensive dataset of extant hominoids and fossil hominins. First, we verify if the values of ratios can distinguish extant humans from apes. Then, we test whether extinct hominins can be distinguished from non-bipedal extant hominoids. Finally, we assess if the studied ratios are effective predictors of bipedal behavior by testing if they mainly relate to variation in foramen magnum position rather than changes in other cranial structures. Our results confirm that the ratios discriminate between extant bipeds and non-bipeds. However, the only ratio clearly discriminating between fossil hominins and other extant apes is that which only includes basicranial structures. We show that a large proportion of the interspecific variation in the other ratios relates to changes in facial, rather than basicranial, structures. In this context, we advocate the use of measurements based only on basicranial structures when assessing the relationship between foramen magnum position and bipedalism in future studies.

International audience; The Making Numbers research Project, funded by the Nuffield Foundation, has developed guidance for teachers of 3 to 9 year olds on the use of manipulatives in the teaching of arithmetic. The project, which consisted of a literature review, survey of teacher use and small-scale teaching investigations, identified key principles and issues for the use of manipulatives. This paper gives a brief overview of project findings, which are reported elsewhere, and discusses issues relating to the early years from the literature review.

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Auditory-verbal hallucinations (AVHs) are frequent and disabling symptoms, which can be refractory to conventional psychopharmacological treatment in more than 25% of the cases. Recent advances in brain imaging allow for a better understanding of the neural underpinnings of AVHs. These findings strengthened transdiagnostic neurocognitive models that characterize these frequent and disabling experiences. At the same time, technical improvements in real-time functional magnetic resonance imaging (fMRI) enabled the development of innovative and non-invasive methods with the potential to relieve psychiatric symptoms, such as fMRI-based neurofeedback (fMRI-NF). During fMRI-NF, brain activity is measured and fed back in real time to the participant in order to help subjects to progressively achieve voluntary control over their own neural activity. Precisely defining the target brain area/network(s) appears critical in fMRI-NF protocols. After reviewing the available neurocognitive models for AVHs, we elaborate on how recent findings in the field may help to develop strong a priori strategies for fMRI-NF target localization. The first approach relies on imaging-based "trait markers" (i.e., persistent traits or vulnerability markers that can also be detected in the presymptomatic and remitted phases of AVHs). The goal of such strategies is to target areas that show aberrant activations during AVHs or are known to be involved in compensatory activation (or resilience processes). Brain regions, from which the NF signal is derived, can be based on structural MRI and neurocognitive knowledge, or functional MRI information collected during specific cognitive tasks. Because hallucinations are acute and intrusive symptoms, a second strategy focuses more on "state markers." In this case, the signal of interest relies on fMRI capture of the neural networks exhibiting increased activity during AVHs occurrences, by means of multivariate pattern recognition methods. The fine-grained activity patterns concomitant to hallucinations can then be fed back to the patients for therapeutic purpose. Considering the potential cost necessary to implement fMRI-NF, proof-of-concept studies are urgently required to define the optimal strategy for application in patients with AVHs. This technique has the potential to establish a new brain imaging-guided psychotherapy for patients that do not respond to conventional treatments and take functional neuroimaging to therapeutic applications.

The effects of unnatural disturbances on the behaviour and energetics of animals are an important issue for conservation and commercial animal production. Biologging enables estimation of the energy costs of these disturbances, but not specifically the effect these costs have on growth; a key outcome measure for animal farming enterprises. We looked at how natural and anthropogenically induced activity and energy expenditure of king scallops Pecten maximus varies with temperature. These data were then used to model growth time of king scallops reared in an aquaculture facility under different temperatures and anthropogenic disturbance levels. The scallops exhibited a typical total metabolic rate (MR)–temperature curve, with a peak reached at a middling temperature. The percentage of their total MR associated with spinning and swimming, behavioural responses to disturbance, was considerable. Interestingly, as temperature increased, the activity MR associated with a given level of activity decreased; a hitherto unreported relationship in any species. The model results suggest there is a trade-off in the ambient temperature that should be set by hatcheries between the optimal for scallop growth if completely undisturbed versus mitigating against the energy costs elicited by anthropogenic disturbance. Furthermore, the model indicates that this trade-off is affected by scallop size. Aquaculture facilities typically have controls to limit the impact of human activities, yet the present data indicate that hatcheries may be advised to consider whether more controls could further decrease extraneous scallop behaviours, resulting in enhanced scallop yields and improved financial margins.

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Dans le contexte républicain français, les discriminations n'ont émergé comme question sociale qu'au cours des années 1990, sous l'impulsion des politiques publiques, notamment européennes, mais aussi d'acteurs scientifiques, associatifs et syndicaux.Tout au long de la décennie, et avant qu'ils ne deviennent un sujet de préoccupation institutionnelle, plusieurs travaux précurseurs en sciences sociales se sont penchés sur les phénomènes discriminatoires.

The success of invasive species is tightly linked to their fitness in a putatively novel environment. While quantitative components of fitness have been studied extensively in the context of invasive species, fewer studies have looked at qualitative components of fitness, such as behavioral plasticity, and their interaction with quantitative components, despite intuitive benefits over the course of an invasion. In particular, learning is a form of behavioral plasticity that makes it possible to finely tune behavior according to environmental conditions. Learning can be crucial for survival and reproduction of introduced organisms in novel areas, for example, for detecting new predators, or finding mates or oviposition sites. Here we explored how oviposition performance evolved in relation to both fecundity and learning during an invasion, using native and introduced Drosophila subobscura populations performing an ecologically relevant task. Our results indicated that, under comparable conditions, invasive populations performed better during our oviposition task than did native populations. This was because invasive populations had higher fecundity, together with similar cognitive performance when compared to native populations, and that there was no interaction between learning and fecundity. Unexpectedly, our study did not reveal an allocation trade‐off (i.e., a negative relationship) between learning and fecundity. On the contrary, the pattern we observed was more consistent with an acquisition trade‐off, meaning that fecundity could be limited by availability of resources, unlike cognitive ability. This pattern might be the consequence of escaping natural enemies and/or competitors during the introduction. The apparent lack of evolution of learning may indicate that the introduced population did not face novel cognitive challenges in the new environment (i.e., cognitive “pre‐adaptation”). Alternatively, the evolution of learning may have been transient and therefore not detected.

International audience; Returning to the shore after a feeding sojourn at sea, king penguins often undertake a relativelylong terrestrial journey to the breeding colony carrying a heavy, mostly frontal, accumulationof fat along with food in the stomach for chick-provisioning. There they mustsurvive a fasting period of up to a month in duration, during which their complete reliance onendogenous energy stores results in a dramatic loss in body mass. Our aim was to determineif the king penguin’s walking gait changes with variations in body mass.We investigatedthis by walking king penguins on a treadmill while instrumented with an accelerationdata logger. The stride frequency, dynamic body acceleration (DBA) and posture of fat (prefasting;13.2 kg) and slim (post fasting; 11 kg) king penguins were assessed while theywalked at the same speed (1.4km/h) on a treadmill. Paired statistical tests indicated no evidencefor a difference in dynamic body acceleration or stride frequency between the twobody masses however there was substantially less variability in both leaning angle and theleaning amplitude of the body when the birds were slimmer. Furthermore, there was someevidence that the slimmer birds exhibited a decrease in waddling amplitude. We suggestthe increase in variability of both leaning angle and amplitude, as well as a possibly greatervariability in the waddling amplitude, is likely to result from the frontal fat accumulation whenthe birds are heavier, which may move the centre of mass anteriorly, resulting in a less stableupright posture. This study is the first to use accelerometry to better understand the gaitof a species within a specific ecological context: the considerable body mass change exhibitedby king penguins.

Habitat complexity can influence predation rates (e.g. by providing refuge) but other ecosystem processes and species interactions might also be modulated by the properties of habitat structure. Here, we focussed on how complexity of artificial habitat (plastic plants), in microcosms, influenced short-term processes driven by three aquatic detritivores. The effects of habitat complexity on leaf decomposition, production of fine organic matter and pH levels were explored by measuring complexity in three ways: 1. as the presence vs. absence of habitat structure; 2. as the amount of structure (3 or 4.5 g of plastic plants); and 3. as the spatial configuration of structures (measured as fractal dimension). The experiment also addressed potential interactions among the consumers by running all possible species combinations. In the experimental microcosms, habitat complexity influenced how species performed, especially when comparing structure present vs. structure absent. Treatments with structure showed higher fine particulate matter production and lower pH compared to treatments without structures and this was probably due to higher digestion and respiration when structures were present. When we explored the effects of the different complexity levels, we found that the amount of structure added explained more than the fractal dimension of the structures. We give a detailed overview of the experimental design, statistical models and R codes, because our statistical analysis can be applied to other study systems (and disciplines such as restoration ecology). We further make suggestions of how to optimise statistical power when artificially assembling, and analysing, 'habitat complexity' by not confounding complexity with the amount of structure added. In summary, this study highlights the importance of habitat complexity for energy flow and the maintenance of ecosystem processes in aquatic ecosystems. This work was supported by the Spanish Ministry of Economy and Competitiveness through the project SCARCE Consolider-Ingenio CSD2009-00065 (http://www.icra.cat/projects/consolider-ingenio-2010-scarce-assesing/1) to LF. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. LF was supported in part by the Spanish Ministry of Economy and Competitiveness through the project SCARCE Consolider-Ingenio CSD2009-00065.

SUMMARY Quantification of prey consumption by marine predators is key to understanding the organisation of ecosystems. This especially concerns penguins, which are major consumers of southern food webs. As direct observation of their feeding activity is not possible, several indirect methods have been developed that take advantage of miniaturised data logging technology, most commonly: detection of (i) anomalies in diving profiles (wiggles), (ii) drops in oesophageal temperature and (iii) the opening of mouth parts (recorded with a Hall sensor). In the present study, we used these three techniques to compare their validity and obtain information about the feeding activity of two free-ranging king penguins (Aptenodytes patagonicus). Crucially, and for the first time, two types of beak-opening events were identified. Type A was believed to correspond to failed prey-capture attempts and type B to successful attempts, because, in nearly all cases, only type B was followed by a drop in oesophageal temperature. The number of beak-opening events, oesophageal temperature drops and wiggles per dive were all correlated. However, for a given dive, the number of wiggles and oesophageal temperature drops were lower than the number of beak-opening events. Our results suggest that recording beak opening is a very accurate method for detecting prey ingestions by diving seabirds at a fine scale. However, these advantages are counterbalanced by the difficulty, and hence potential adverse effects, of instrumenting birds with the necessary sensor/magnet, which is in contrast to the less accurate but more practicable methods of measuring dive profiles or, to a lesser extent, oesophageal temperature.

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This paper is concerned with resonances of the tragic in twentieth-century central-European dance theatet, to be discussed with particular reference to Pina Bausch's 1975 Orpheus and Eurydice. In my study Resonances of the Tragic: Between Event and Affect (2015), I have argued that in terms of a history of the “longue durée,” the evocation of the tragic occurs in a field of tension between technique, the mise-en-scène, and conceptions, as well as procedures and moments of interruption, of suspension, of disruption and of the indeterminable resulting from ecstatic corporeality. Its structure and function can generate an event in the emphatic sense of the term; consequently, it provides a paradigm for recognizing structures of form and of an aesthetic of reception, structures emerging from individual constellations of the fictional and choric, absence and presence. From the perspective of dance studies, the tragic emanates from the representation of horrendous monstrosity testing the limits of what can be imagined by means of the moved body in all senses of the word; but how exactly does Bausch produce the qualities of the ambivalent, ambiguous, and paradoxical—and, consequently, the tragic?

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International audience; The rate of change in resting metabolic rate (RMR) as a result of a temperature increase of 10 °C is termed the temperature coefficient (Q10), which is often used to predict how an organism’s total MR will change with temperature. However, this method neglects a potentially key component of MR; changes in activity level (and thus activity MR; AMR) with temperature may significantly alter the relationship between MR and temperature. The present study seeks to describe how thermal effects on total MR estimated from RMR–temperature measurements can be misleading when the contribution of activity to total MR is neglected. A simple conceptual framework illustrates that since the relationship between activity levels and temperature can be different to the relationship between RMR and temperature, a consistent relationship between RMR and total MR cannot be assumed. Thus the thermal effect on total MR can be considerably different to the thermal effect on RMR. Simultaneously measured MR and activity from three ectotherm species with differing behavioural and physiological ecologies were used to empirically examine how changes in temperature drive changes in RMR, activity level, AMR and the Q10 of MR. These species exhibited varied activity– and MR–temperature relationships, underlining the difficulty in predicting thermal influences on activity levels and total MR. These data support a model showing that thermal effects on total MR will deviate from predictions based solely on RMR; this deviation will depend upon the difference in Q10 between AMR and RMR, and the relative contribution of AMR to total MR. To develop mechanistic, predictive models for species’ metabolic responses to temperature changes, empirical information about the relationships between activity levels, MR and temperature, such as reported here, is required. This will supersede predictions based on RMR alone.