In lieu of an abstract, here is a brief excerpt of the content:Grand Manner Aesthetics in LandscapeFrom Canvas to CelluloidEmily E. Auger (bio)Popular films about the environment and related human and material resource issues, particularly colonialism, tend to enhance the appeal of their subject matter by aesthetically transforming it according to audience preferences and tastes. Such mediating strategies are perhaps too familiar to contemporary artists of all types who would prefer to work beyond the limits of what their readers (...) or viewers are prepared to tolerate as entertainment, but the particular emphases and accommodations made by film artists to convey messages about the environment are little changed from those strategies used by painters over the past three centuries to a similar end. The methods by which environmental issues are aestheticized in late-twentieth-century film is directly and historically related to those established for grand manner painters by Nicholas Poussin (1594-1665) and taught at the French academy from the seventeenth through the nineteenth centuries. That these fundamentals were part of the training of artists who would be willing and able to enhance the glory of Louis XIV's absolutist monarchy seems not to have undermined the popular enthusiasm their association with the "classical" past generated outside of France. Thus, the grand manner ideal was repeated, elaborated, and adapted by subsequent British and American artists, teachers, and aestheticians, both amateur and professional, including Joshua Reynolds (1723-92), president of the British academy; theoretician Edmund Burke (1729-97); and such American painters as Benjamin West (1738-1820), Thomas Cole (1801-48), Frederic Church (1826-1900), and Albert Bierstadt (1830-1902).Examples of filmic adaptations of grand manner aesthetics considered here include English director John Boorman's The Emerald Forest (1985) and Anglo-French director Roland Joffé's The Mission (1986), both British productions; Kevin Costner's Dances with Wolves (1990) and John McTiernan's [End Page 96] Medicine Man (1992), both American productions with American directors; and Australian director Bruce Beresford's Black Robe (1991), a Canadian/Australian production based on Irish-born, Canadian novelist Brian Moore's best-selling novel of the same title (1985). While it might be argued that these films merely show the adaptation of academy-based grand manner ideals and principles to new imperialist interests, this article demonstrates how they educate and draw public sympathy to global environmental concerns, albeit with reference to a recognizably Western aesthetic tradition. Thus, the interest of this study to educators and students of the visual arts is twofold: first, it demonstrates the continued adaptation and application of aesthetic principles originally developed in the seventeenth century to a technology-based medium; and second, it shows how those aesthetic principles are currently applied in film to direct and modulate public opinion on matters well beyond the domain of pure or theoretical aesthetics.The grand manner aesthetic, first defined with reference to seventeenth-century painting and still apparent in twentieth-century film, is largely attributable to Poussin since he was an artist who wrote—and wrote well—about his understanding of artistic quality and priorities. He was deeply committed to classicism; he thought the elements of a painting should be idealized rather than realistic and particularized, that those elements should be clearly delineated in a linear manner, that exotic subjects and excessive color should be avoided as both appeal too much to the senses and not enough to the mind, and that figures should always predominate over landscape. Poussin's ideals became the model for students training at the French Academy, an institution officially formed in 1648 under the direct control of the government. Aspiring academicians were exhorted to produce images that were usually composites of the better, and sometimes imagined, aspects of the appearance, character, and deeds of the fictional and historical people, events, and locations that were their subjects. They were never allowed to forgot the hierarchy of value that placed genre painting forever below history painting, yet it cannot have escaped their notice that a certain number of well-executed examples of the lowly still life, domestic interior, and picturesque landscape on the exhibition walls made the "grandness" of more ambitious works more apparent by contrast.The French Academy soon became the envy of foreign upper-level bureaucrats cognizant... (shrink)

Inuit artists espouse aesthetic values which are indicative of the degree of their involvement with the western art world and of the non-artistic cultural values which they wish to convey and perpetuate in their own communities. It is in this latter expression that Inuit aesthetics may be studied as a conveyor of Inuit rather than non-Inuit culture. In this paper, the statements made by Inuit woman artists from the Keewatin district are analysed with reference to the values associated with contemporary (...) mainstream fine art and the artists' own assertions regarding the importance of non-artistic values in the art-making process. (shrink)

Research highlights several risk and resilience factors at multiple ecological levels that influence individuals’ mental health and wellbeing in their everyday lives and, more specifically, in disaster or outbreak situations. However, there is limited research on the role of these factors in the early days of the COVID-19 crisis. The present study examined if and how potential risk factors and resilience factors are associated with mental health and well-being outcomes, and whether these resilience factors buffer the associations between risk factors (...) and said outcomes. One to two weeks after the government recommended preventative measures, 1,122 Canadian workers completed an online questionnaire, including multiple wellbeing outcome scales in addition to measures of potential risk and resilience factors. Structural equation models were tested, highlighting that overall, the considered risk factors were associated with poorer wellbeing outcomes, except social distancing which was associated with lower levels of stress. Each of the potential resilience factors was found to have a main effect on one or more of the wellbeing outcomes. Moderation analysis indicated that in general these resilience factors did not, however, buffer the risk factors. The findings confirm that the COVID-19 crisis encompasses several stressors related to the virus as well as to its impact on one’s social, occupational, and financial situation, which put people at risk for lower wellbeing as early as one to two weeks after the crisis began. While several resilience factors emerged as positively related to wellbeing, such factors may not be enough, or sufficiently activated at that time, to buffer the effects of the numerous life changes required by COVID-19. From an ecological perspective, while mental health professionals and public health decision-makers should offer/design services directly focused on mental health and wellbeing, it is important they go beyond celebrating individuals’ inner potential for resilience, and also support individuals in activating their environmental resources during a pandemic. (shrink)

Anthropocentrism was born with Man, and certain primitive tribes or ethnic groups considered themselves the center of the world. Their members assumed the generic name “the Men,” and all the rest, including other, tribes or ethnic groups, were part of a more or less hostile environment (to use the modern term).

"Depuis une quinzaine d'années, les études sur Montesquieu se sont profondément renouvelées. Le corpus lui-même, grâce aux OEuvres complètes en cours, et notamment avec la première publication intégrale du manuscrit de travail de L'Esprit des lois, offre des perspectives inédites. Mais c'est aussi l'approche même qui a changé : la diversité des questions et des thèmes que son oeuvre permet d'aborder élargit le champ de la recherche, de la philosophie morale et politique à l'histoire ou l'anthropologie, ou encore à la (...) pensée du droit et de la société. Ce volume en tire méthodiquement les conséquences. Dans la perspective de l'édition critique des OEuvres complètes de Montesquieu, c'est à une relecture non pas radicale, mais en finesse et en profondeur qu'invite ce volume, en développant le rapport entre l'homme et la société, en redessinant la relation aux grands massifs de la tradition philosophique d'une pensée dont on suit jusqu'à son terme la logique, en suggérant des relations inédites à travers des rapprochements qui s'imposent, mais n'avaient pourtant guère été faits : ce qui restait informe ou informulé s'est éclairé, ce dont on devinait l'importance s'est approfondi. Ensuite, que restera-t-il à (re)lire? L'Esprit des lois."--Page [4] de la couverture. (shrink)

We argued in a recent issue of this journal that if abortion is restricted,1 then there are parallel obligations for parents to donate body parts to their children. The strength of this obligation to donate is proportional to the strength of the abortion restrictions. If abortion is never permissible, then a parent must always donate any organ if they are a match. If abortion is sometimes permissible and sometimes not, then organ donation is sometimes obligatory and sometimes not. Our argument (...) was based on the following ideas: (a) that a fetus has full moral status, (b) that parents have special obligations to their offspring, fetus or not, and (c) that this special obligation is to protect them. The result is the conclusion that abortion restrictivists cannot also consistently deny that organ donation should be compulsory. (shrink)

An incisive exploration of the way Greek myths empower us to defeat tyranny. As tyrannical passions increasingly plague twenty-first-century politics, tales told in ancient Greek epics and tragedies provide a vital antidote. Democracy as a concept did not exist until the Greeks coined the term and tried the experiment, but the idea can be traced to stories that the ancient Greeks told and retold. From the eighth through the fifth centuries BCE, Homeric epics and Athenian tragedies exposed the tyrannical potential (...) of individuals and groups large and small. These stories identified abuses of power as self-defeating. They initiated and fostered a movement away from despotism and toward broader forms of political participation. Following her highly praised book Enraged: Why Violent Times Need Ancient Greek Myths, the classicist Emily Katz Anhalt retells tales from key ancient Greek texts and proceeds to interpret the important message they hold for us today. As she reveals, Homer's Iliad and Odyssey, Aeschylus's Oresteia, and Sophocles's Antigone encourage us—as they encouraged the ancient Greeks—to take responsibility for our own choices and their consequences. These stories emphasize the responsibilities that come with power (any power, whether derived from birth, wealth, personal talents, or numerical advantage), reminding us that the powerful and the powerless alike have obligations to each other. They assist us in restraining destructive passions and balancing tribal allegiances with civic responsibilities. They empower us to resist the tyrannical impulses not only of others but also in ourselves. In an era of political polarization, Embattled demonstrates that if we seek to eradicate tyranny in all its toxic forms, ancient Greek epics and tragedies can point the way. (shrink)

About half of the undergraduate and roughly 40 percent of graduate degree recipients in science and engineering are women. As increasing numbers of these women pursue research careers in science, many who choose to have children discover the unique difficulties of balancing a professional life in these highly competitive (and often male-dominated) fields with the demands of motherhood. Although this issue directly affects the career advancement of women scientists, it is rarely discussed as a professional concern, leaving individuals to face (...) the dilemma on their own. To address this obvious but unacknowledged crisis—the elephant in the laboratory, according to one scientist—Emily Monosson, an independent toxicologist, has brought together 34 women scientists from overlapping generations and several fields of research—including physics, chemistry, geography, paleontology, and ecology, among others—to share their experiences. From women who began their careers in the 1970s and brought their newborns to work, breastfeeding them under ponchos, to graduate students today, the authors of the candid essays written for this groundbreaking volume reveal a range of career choices: the authors work part-time and full-time; they opt out and then opt back in; they become entrepreneurs and job share; they teach high school and have achieved tenure. The personal stories that comprise Motherhood, the Elephant in the Laboratory not only show the many ways in which women can successfully combine motherhood and a career in science but also address and redefine what it means to be a successful scientist. These valuable narratives encourage institutions of higher education and scientific research to accommodate the needs of scientists who decide to have children. (shrink)

Play is a vital component of the social life and well-being of both children and adults. This book examines the concept of play and considers a variety of the related philosophical issues. It also includes meta-analyses from a range of philosophers and theorists, as well as an exploration of some key applied ethical considerations. The main objective of The Philosophy of Play is to provide a richer understanding of the concept and nature of play and its relation to human life (...) and values, and to build disciplinary and paradigmatic bridges between scholars of philosophy and scholars of play. Including specific chapters dedicated to children and play, and exploring the work of key thinkers such as Plato, Sartre, Wittgenstein, Gadamer, Deleuze and Nietzsche, this book is invaluable reading for any advanced student, researcher or practitioner with an interest in education, playwork, leisure studies, applied ethics or the philosophy of sport. (shrink)

_Philosophers consider race and racism from the perspective of lived, bodily experience._.

Research on the specific features of daydreaming compared with mind-wandering and night dreaming is a neglected topic in the philosophy of mind and the cognitive neuroscience of spontaneous thought. The extant research either conflates daydreaming with mind-wandering (whether understood as task-unrelated thought, unguided attention, or disunified thought), characterizes daydreaming as opposed to mind-wandering (Dorsch, 2015), or takes daydreaming to encompass any and all “imagined events” (Newby-Clark & Thavendran, 2018). These dueling definitions obstruct future research on spontaneous thought, and are insufficiently (...) precise to guide empirical studies. They also fail to illuminate the phenomenal core of daydreaming, namely, its dreamlike qualities. Although daydreaming is related to both mind-wandering and narrative imagination, it is not reducible to either. We argue that daydreams are experiences of spontaneous, immersive imagination in the waking state. The main task of our investigation is to distinguish daydreaming, conceptually and phenomenologically, from mind-wandering, on the one hand, and night dreaming, on the other. Although daydream experiences can vary widely, we distinguish prototypical experiences of daydreaming from adjacent imaginative activity, including fleeting imagery and “focused daydreaming,” or crafted visualization. We consider our phenomenological analysis as preparatory work for conceptually distinguishing different spontaneous and imaginative states so that they can be investigated accordingly with questionnaires and qualitative methods. We argue that precision about the phenomenal character of daydreaming can guide neurophenomenological investigations, help delimit studies on individual variance in daydreaming features, and identify differences among daydreaming, mind-wandering, and night dreaming conceptually and phenomenologically, and possibly eventually in terms of neural correlates. (shrink)

Emily Elizabeth Constance Jones was an English logician and contemporary of Bertrand Russell, as well as Mistress of Girton College, Cambridge. In this book, originally published in 1911, she argues for the existence of another fundamental law of thought to join the Law of Contradiction and the Law of Excluded Middle: the Law of Significant Assertion. This book will be of value to anyone with an interest in logic or in Jones' work.

Incomplete Archaeologies takes a familiar archaeological concept--assemblages--and reconsiders such groupings, collections and sets of things from the perspective of the work required to assemble them. The discussions presented here engage with the practices of collection, construction, performance and creation in the past (and present) which constitute the things and groups of things studied by archaeologists--and examine as well how these things and thing-groups are dismantled, rearranged, and even destroyed, only to be rebuilt and recreated. The ultimate aim is to reassert (...) an awareness of the incompleteness of assemblage, and thus the importance of practices of assembling (whether they seem at first creative or destructive) for understanding social life in the past as well as the present. The individual chapters represent critical engagements with this aim by archaeologists presenting a broad scope of case studies from Eurasia and the Mediterranean. Case studies include discussions of mortuary practice from numerous angles, the sociopolitics of metallurgy, human-animal relationships, landscape and memory, the assembly of political subjectivity and the curation of sovereignty. These studies emphasise the incomplete and ongoing nature of social action in the past, and stress the critical significance of a deeper understanding of formation processes as well as contextual archaeologies to practices of archaeology, museology, art history, and other related disciplines. Contributors challenge archaeologists and others to think past the objects in the assemblage to the practices of assembling, enabling us to consider not only plural modes of interacting with and perceiving things, spaces, human bodies and temporalities in the past, but also to perhaps discover alternate modes of framing these interactions and relationships in our analyses. Ultimately then, Incomplete Archaeologies takes aim at the perceived totality not only of assemblages of artefacts on shelves and desks, but also that of some of archaeology's seeming-seamless epistemological objects"--From publisher's website. (shrink)

Exploring the intimate tie between body movement and space and time, Lee begins with the position that body movement generates space and time and explores the ethical implications of this responsibility for the situations one’s body movements generate. Whiteness theory has come to recognize the ethical responsibility for situations not of one’s own making and hence accountability for the results of more than one’s immediate personal conscious decisions. Because of our specific history, whites have developed a particular embodiment and body (...) movement that generates places that can only be characterized as more comfortable and more enabling to whites. (shrink)

Recent work in the philosophy of emotion focuses on challenging dualistic conceptualizations. Three of the most obvious dualisms are the following: 1. emotion opposes reason; 2. emotion is subjective, while reason is objective; 3. emotion lies internal to the subject, while reason is external. With challenges to these dualisms, one of the more interesting questions that has surfaced is the idea of emotional appropriateness in a particular context. Here, consider a widely held belief in the United States associates racialized groups (...) with specific emotions—most notably African American women with anger. Clearly these emotional attributions are essentialistic--and hence racist. But this response is too easy. The acknowledgement that emotion lies both internally in the subject and externally in the world opens the possibility of attributing an emotional temperament to a population group. Yet if an identity group has an emotional temperament, can they be accountable for emotionally appropriate behavior? (shrink)

In Living for Pleasure, philosopher Emily Austin offers a lively, jargon-free tour of Epicurean strategies for diminishing anxiety, achieving satisfaction, and relishing joys.

In this thoughtful and provocative work, scholar Emily Herman explores the ideas of two of the most important philosophers of the 20th century and their relevance to Christian thought. From the concept of time to the nature of human existence, this book offers important insights into some of the most pressing questions of our time. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work (...) is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

The laws of nature have come a long way since the time of Newton: quantum mechanics and relativity have given us good reasons to take seriously the possibility of laws which may be non-local, atemporal, ‘all-at-once,’ retrocausal, or in some other way not well-suited to the standard dynamical time evolution paradigm. Laws of this kind can be accommodated within a Humean approach to lawhood, but many extant non-Humean approaches face significant challenges when we try to apply them to laws outside (...) the time evolution picture. Thus for proponents of non-Humean approaches to lawhood there is a clear need for a novel non-Humean account which is capable of accommodating these sorts of laws. In this paper we propose such an account, characterizing lawhood in terms of constraints, which are understood as a form of modal structure. We demonstrate that our proposed realist account can indeed accommodate a large variety of laws outside the time evolution paradigm, and describe some possible applications to important philosophical problems. (shrink)

The importance of ethical consumerism to many companies worldwide has increased dramatically in recent years. Ethical consumerism encompasses the importance of non-traditional and social components of a company's products and business process to strategic success - such as environmental protectionism, child labor practices and so on. The present paper utilizes a random utility theoretic experimental design to provide estimates of the relative value selected consumers place on the social features of products.

Dementia patients in the moderate-late stage of the disease can, and often do, express different preferences than they did at the onset of their condition. The received view in the philosophical literature argues that advance directives which prioritize the patient’s preferences at onset ought to be given decisive moral weight in medical decision-making. Clinical practice, on the other hand, favors giving moral weight to the preferences expressed by dementia patients after onset. The purpose of this article is to show that (...) the received view in the philosophical literature is inadequate and is out of touch with real clinical practice. I argue that having dementia is a cognitive transformative experience and that preference changes which result from this are legitimate and ought to be given moral weight in medical decision-making. This argument ought to encourage us to reduce our confidence in the moral weight of advance directives for dementia patients. (shrink)

Nearly all studies of consumers’ willingness to engage in ethical or socially responsible purchasing behavior is based on unconstrained survey response methods. In the present article we ask the question of how well does asking consumers the extent to which they care about a specific social or ethical issue relate to how they would behave in a more constrained environment where there is no socially acceptable response. The results of a comparison between traditional survey questions of “intention to purchase” and (...) estimates of individuals willingness-to-pay for social attributes in products reveal that simple survey questions are too “noisy” to provide operationally meaningful information and overstate intentions to a considerable extent. (shrink)

Concepts like testimonial injustice (Fricker, 2007) and testimonial violence (Dotson, 2011) articulate that marginalized epistemic agents are unjustly undermined as testifiers when dominant agents cannot or will not hear, understand, or believe their testimony. This paper turns attention away from these constraints on uptake, and towards pragmatic, social, and political constraints on how dominant audiences receive and react to testimony. I argue that these constraints can also be sources of testimonial injustice and epistemic violence. Specifically, I explore a kind of (...) injustice that I call testimonial withdrawal, which occurs when a would-be speaker chooses to remain silent because they know or reasonably expect that there is pragmatic risk associated with speaking, given their unjust marginalization. I argue that this unjustly undermines epistemic agency, and that expanding Fricker and Dotson’s umbrella concepts to accommodate this idea results in a better understanding of the moral and epistemic contours of both testimonial withdrawal and these broader categories. (shrink)

The concept of self-gaslighting has recently become prevalent in popular discourse but has yet to be subjected to detailed philosophical analysis. In this paper, I examine one context in which self-gaslighting is often discussed: situations in which someone has experienced trauma. I argue that the phenomenon currently described as self-gaslighting fails to display core features of manipulative gaslighting and that therefore we should seek other conceptual resources for understanding such cases. I suggest that self-gaslighting, at least in some paradigmatic cases, (...) amounts to either extremely successful interpersonal gaslighting or to internalized oppression. Utilizing these concepts instead of self-gaslighting avoids conceptual difficulties and also has a significant practical payoff. By moving away from the language of self-gaslighting we can move away from feelings of self-blame that so often accompany trauma. (shrink)

... The purpose of this paper is to try to clarify the extent to which consumers “value” ethical product features when making purchases by utilizing a distinctive methodology – structured choice experiments ( Louviere et al., 2000) – that What Will Consumers Pay ... Jordan J. Louviere ... \n.

Relational quantum mechanics (RQM) is an interpretation of quantum mechanics based on the idea that quantum states do not describe an absolute property of a system but rather a relationship between systems. There have recently been some criticisms of RQM pertaining to issues around intersubjectivity. In this article, we show how RQM can address these criticisms by adding a new postulate which requires that all of the information possessed by a certain observer is stored in physical variables of that observer (...) and thus is accessible by measurement to other observers. This makes it possible for observers to reach intersubjective agreement about quantum events that have occurred in the past. We suggest a possible ontology for a version of RQM employing this postulate; this ontology upholds the principle that quantum states are always relational, but it also postulates a set of quantum events that are not strictly relational. We show that the new postulate helps address the preferred basis problem in RQM. (shrink)

International law codifies the principle of non-combatant immunity, which traces its origins to a religiously supported moral imperative. The principle of non-combatant immunity has evolved to become a crucial underpinning of just war theory. Western societal norms have complicated our understanding and application of the principle of non-combatant immunity by depicting combatancy in terms of innocence and guilt: those viewed as innocent deserve legal protection. Child soldiers and female suicide bombers exemplify today's complex and expanding parameters of combat. Consequently, in (...) practice, authorities in conflict zones cannot rely on existing legal distinctions; instead, they are forced to make subjective judgements when deciding whom to protect. This article calls for a critical evaluation of: existing legal definitions concerning non-combatants; how conceptions of combatancy are applied in protective policy and humanitarian evacuation; and the resulting consequences and policy implications. (shrink)

We consider a two-patch epidemiological system where individuals can move from one patch to another, and local interactions between the individuals within a patch are governed by the classical SIRS model. When the time-scale associated with migration is much smaller than the time-scale associated with infection, aggregation methods can be used to simplify the initial complete model formulated as a system of ordinary differential equations. Analysis of the aggregated model then shows that the two-patch basic reproduction rate is smaller than (...) the 1 patch one. We extend this result to a linear chain of P patches . These results are illustrated by some examples for which numerical integration of the system of ordinary differential equations is performed. Simulations of an individual based model implemented with a multi-agent system are also carried out. (shrink)

Experiments are commonly thought to have epistemic privilege over simulations. Two ideas underpin this belief: first, experiments generate greater inferential power than simulations, and second, simulations cannot surprise us the way experiments can. In this article I argue that neither of these claims is true of experiments versus simulations in general. We should give up the common practice of resting in-principle judgments about the epistemic value of cases of scientific inquiry on whether we classify those cases as experiments or simulations, (...) per se. To the extent that either methodology puts researchers in a privileged epistemic position, this is context sensitive. (shrink)

We generally agree with Burt's thesis. However, we note that the author did not discuss epigenetics, the study of how the environment can alter gene structure and function. Given epigenetic mechanisms, the utility of polygenic risk scores (PRS) is limited in studies of development and mental illness. Finally, in this commentary we expand upon the risks of reliance upon PRSs.

Any successful interpretation of quantum mechanics must explain how our empirical evidence allows us to come to know about quantum mechanics. In this article, we argue that this vital criterion is not met by the class of ‘orthodox interpretations,’ which includes QBism, neo-Copenhagen interpretations, and some versions of relational quantum mechanics. We demonstrate that intersubjectivity fails in radical ways in these approaches, and we explain why intersubjectivity matters for empirical confirmation. We take a detailed look at the way in which (...) belief-updating might work in the kind of universe postulated by an orthodox interpretation, and argue that observers in such a universe are unable to escape their own perspective in order to learn about the structure of the set of perspectives that is supposed to make up reality according to these interpretations. We also argue that in some versions of these interpretations it is not even possible to use one’s own relative frequencies for empirical confirmation. Ultimately we conclude that it cannot be rational to believe these sorts of interpretations unless they are supplemented with some observer-independent structure which underwrites intersubjective agreement in at least certain sorts of cases. (shrink)

This work presents a mathematical model describing the interactions between the cross-shore structure of small pelagic fish population an their exploitation by coastal and offshore fisheries. The complete model is a system of seven ODE’s governing three stocks of small pelagic fish population moving and growing between three zones. Two types of fishing fleets are inter-acting with the fish population, industrial boats, constrained to offshore area, and artisanal boats, operating from the shore. Two time scales were considered and we use (...) aggregation methods that allow us to reduce the dimension of the model and to obtain an aggregated model, which is a four dimension one. The analysis of the aggregated model is performed. We discuss the possible equilibriums and their meaning in terms of fishery management. An interesting equilibrium state can be obtained for which we can expect coexistence and a stable equilibrium state between fish stocks and fishing efforts. Some identification parameters are also given in the discussion part of the model. (shrink)

We study the case of two sibling species ofHippolais(Aves). Very little differences can be observed in the morphology of both species. The breeding area of these species are complementary. Roughly, one species breeds North and East of Europe (Hippolais icterina) while the other breeds South and West of Europe (Hippolais polyglotta). There exitst a narrow zone of sympatry passing through Burgundy. Since several years, it has been observed that this area of sympatry was moving in the North-East direction at a (...) European scale. This means that progressivelyH. icterina is declining and is replaced byH. polyglotta. Some assumptions can be made in order to explain this evolution, for instance competition or predation. Series of observations concerning the diets of nestlings of both species have been realized. These observations show some differences in the diet compositions. The breeding success of the two species has been studied. Numerical simulations of a competition model taking into account the observed differences between the food types eaten by the two species are presented. These simulations do not explain the regression ofH. icterina. Then, we present numerical simulations of a predation model with one predator attacking the nestlings of both species. These simulations show that with time one of the two preys must extinct. Predation rather than competition seems to be the right explanation. (shrink)