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Bello, T.R. |
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Practical treatment of body and open leg wounds of horses with bovine collagen, biosynthetic wound dressing and cyanoacrylate |
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2002 |
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Journal of Equine Veterinary Science |
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22 |
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4 |
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157-164 |
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Horses with severe and deep lacerations are represented by ten cases in which treatment emphasized the use of bovine collagen preparations to promote controlled second-degree repair. Traumatized areas were tarsal, metatarsal, neck, forearm, metacarpal and pastern. Wound size changes were recorded. Depending on the wound type, the site was treated with antibiotic-steroid ointment, organic acid cream, sterile collagen particles, suspension or dressings protected by hydrogel dressing, non-adherent pads, occlusive skin dressings, roll gauze and elastic tape. In three cases, a fiberglas cast was applied over a hind leg wound and lacerated tendon for stability. When controlled granulation of the deeper wounds reached skin level, the area often was stabilized by only cyanoacrylate spray. As these cases presented a wide range of trauma each with a unique history, healing rates were based on initial measurements. An overall progression of wound reduction occurred at a predictable rate. The exogenous collagen formulations were used to stimulate controlled granulation, ie. to “jump start” the healing process. Collagen particles, suspension or dressings were packed into depressions, placed under suture lines, secured over abraded tissue, and placed under protective bandage or cast. To further evaluate the use of cyanoacrylate tissue spray in wound treatments, an additional ten cases are presented. The variety of wounds were produced experimentally in Center-owned ponies or provided as clinical cases. Wound size changes and healing progress were recorded. Wounds occurred on the neck, abdomen, metacarpal, metatarsal, fetlock and pastern areas. Depending on wound type, the site was treated with cyanoacrylate only; or treated as above until controlled granulation attained skin level. In one case punch grafts of skin were transferred from one foreleg to the opposite with the horse standing. Cyanoacrylate spray provided a water proof barrier protecting the wound from dirt, debris and insects as well as stabilizing full-thickness skin lacerations by bridging normal to traumatized skin allowing uninterrupted granulation and epithelialization. The use of a neck cradle prevented wound disturbance and stall confinement aided stabilization. |
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Wakeling,E |
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Feral Horses of the West |
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2002 |
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Parrish, J.K.; Viscido, S.V.; Grunbaum, D. |
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Title |
Self-Organized Fish Schools: An Examination of Emergent Properties |
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2002 |
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Biol Bull |
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Biol Bull |
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202 |
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3 |
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296-305 |
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Heterogeneous, “aggregated” patterns in the spatial distributions of individuals are almost universal across living organisms, from bacteria to higher vertebrates. Whereas specific features of aggregations are often visually striking to human eyes, a heuristic analysis based on human vision is usually not sufficient to answer fundamental questions about how and why organisms aggregate. What are the individual-level behavioral traits that give rise to these features? When qualitatively similar spatial patterns arise from purely physical mechanisms, are these patterns in organisms biologically significant, or are they simply epiphenomena that are likely characteristics of any set of interacting autonomous individuals? If specific features of spatial aggregations do confer advantages or disadvantages in the fitness of group members, how has evolution operated to shape individual behavior in balancing costs and benefits at the individual and group levels? Mathematical models of social behaviors such as schooling in fishes provide a promising avenue to address some of these questions. However, the literature on schooling models has lacked a common framework to objectively and quantitatively characterize relationships between individual-level behaviors and group-level patterns. In this paper, we briefly survey similarities and differences in behavioral algorithms and aggregation statistics among existing schooling models. We present preliminary results of our efforts to develop a modeling framework that synthesizes much of this previous work, and to identify relationships between behavioral parameters and group-level statistics. N1 - |
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Equine Behaviour @ team @ |
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5254 |
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Seeley, T.D. |
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Title |
When Is Self-Organization Used in Biological Systems? |
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2002 |
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Biol Bull |
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Biol Bull |
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202 |
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3 |
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314-318 |
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Self-organization, or decentralized control, is widespread in biological systems, including cells, organisms, and groups. It is not, however, the universal means of organization. I argue that a biological system will be self-organized when it possesses a large number of subunits, and these subunits lack either the communicational abilities or the computational abilities, or both, that are needed to implement centralized control. Such control requires a well informed and highly intelligent supervisor. I stress that the subunits in a self-organized system do not necessarily have low cognitive abilities. A lack of preadaptations for evolving a system-wide communication network can prevent the evolution of centralized control. Hence, sometimes even systems whose subunits possess high cognitive abilities will be self-organized. N1 - |
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Equine Behaviour @ team @ |
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5257 |
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Hemelrijk, C.K. |
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Title |
Self-Organization and Natural Selection in the Evolution of Complex Despotic Societies |
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2002 |
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Biol Bull |
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Biol Bull |
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202 |
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3 |
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283-288 |
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Differences between related species are usually explained as separate adaptations produced by individual selection. I discuss in this paper how related species, which differ in many respects, may evolve by a combination of individual selection, self-organization, and group-selection, requiring an evolutionary adaptation of only a single trait. In line with the supposed evolution of despotic species of macaques, we take as a starting point an ancestral species that is egalitarian and mildly aggressive. We suppose it to live in an environment with abundant food and we put the case that, if food becomes scarce and more clumped, natural selection at the level of the individual will favor individuals with a more intense aggression (implying, for instance, biting and fierce fighting). Using an individual-centered model, called DomWorld, I show what happens when the intensity of aggression increases. In DomWorld, group life is represented by artificial individuals that live in a homogeneous world. Individuals are extremely simple: all they do is flock together and, upon meeting one another, they may perform dominance interactions in which the effects of winning and losing are self-reinforcing. When the intensity of aggression in the model is increased, a complex feedback between the hierarchy and spatial structure results; via self-organization, this feedback causes the egalitarian society to change into a despotic one. The many differences between the two types of artificial society closely correspond to those between despotic and egalitarian macaques in the real world. Given that, in the model, the organization changes as a side effect of the change of one single trait proper to an egalitarian society, in the real world a despotic society may also have arisen as a side effect of the mutation of a single trait of an egalitarian species. If groups with different intensities of aggression evolve in this way, they will also have different gradients of hierarchy. When food is scarce, groups with the steepest hierarchy may have the best chance to survive, because at least a small number of individuals in such a group may succeed in producing offspring, whereas in egalitarian societies every individual is at risk of being insufficiently fed to reproduce. Therefore, intrademic group selection (selection within an interbreeding group) may have contributed to the evolution of despotic societies. N1 - |
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Equine Behaviour @ team @ |
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5201 |
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Pepperberg, I.M. |
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Title |
Cognitive and Communicative Abilities of Grey Parrots |
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Journal Article |
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2002 |
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Current Directions in Psychological Science |
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Curr. Dir. Psychol. Sci. |
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11 |
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3 |
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83-87 |
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Grey parrots (Psittacus erithacus) solve various cognitive tasks and acquire and use English speech in ways that often resemble those of very young children. Given that the psittacine brain is organized very differently from that of mammals, these results have intriguing implications for the study and evolution of vocal learning, communication, and cognition. |
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580 |
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Author |
Rogers,L. J.; Andrew, R. (eds) |
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Title |
Comparative Vertebrate Lateralization |
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2002 |
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No longer viewed as a characteristic unique to humans, brain lateralization is considered a key property of most, if not all, vertebrates. This field of study provides a firm basis from which to examine a number of important issues in the study of brain and behaviour. This book takes a comparative and integrative approach to lateralization in a wide range of vertebrate species, including humans. It highlights model systems that have proved invaluable in elucidating the function, causes, development, and evolution of lateralization. The book is arranged in four parts, beginning with the evolution of lateralization, moving to its development, to its cognitive dimensions, and finally to its role in memory. Experts in lateralization in lower vertebrates, birds, non-primate mammals, and primates have contributed chapters in which they discuss their own research and consider its implications to humans. The book is suitable for researchers, graduates and advanced undergraduates in psychology, neuroscience and the behavioral sciences.
- Unique in its truly comparative approach, covering fish, amphibians, birds, and mammals (including primates and humans) – World-class editors and contributors – Very broad coverage of both theoretical and technical aspects of laterality, including evolution, development, behaviour, and memory
Contents
Preface; Introduction; Part I. Evolution of Lateralization: 1. How ancient is lateralization? G. Vallortigara and A. Bisazza; 2. The earliest origins and subsequent evolution of lateralization R. J. Andrew; 3. The nature of lateralization in tetrapods R. J. Andrew and L. J. Rogers; 4. Advantages and disadvantages of lateralization L. J. Rogers; Part II. Development of Lateralization: 5. Behavioral development and lateralization R. J. Andrew; 6. Factors affecting the development of lateralization in chicks C. Deng and L. J. Rogers; 7. Ontogony of visual lateralization in pigeons O. Güntürkün; 8. Development of laterality and the role of the corpus callosum in rodents and humans P. E. Cowell and V. H. Denenberg; 9. Posture and laterality in human and nonhuman primates: asymmetries in maternal handling and the infant"s early motor asymmetries E. Damerose and J. Vauclair; Part III. Cognition and Lateralization: 10. Evidence of cerebral lateralization from senses other than vision R. J. Andrew and J. A. S. Watkins; 11. Facing an obstacle: lateralization of object and spatial cognition G. Vallortigara and L. Regolin; 12. Laterality of communicative behaviors in nonhuman primates: a critical analysis W. D. Hopkins and S. F. Carriba; 13. Specialized processing of primate facial and vocal expressions: evidence for cerebral asymmetries D. J. Weiss, A. A. Ghazanfar, C. T. Miller and M. D. Hauser; Part IV. Lateralization and Memory: 14. Memory and lateralized recall A. N. B. Johnston and S. P. R. Rose; 15. Memory formation and brain lateralization R. J. Andrew; Epilogue; Appendix; Index.
Reviews
'Andrew & Roger perform an enormous service in bringing data from animal behaviour, neuroanatomy and electrophysiology into contact with traditional zoological concerns such as genetics, embryology and population biology.' Journal of Animal Behaviour
'Whatever the outcome of the war, this book will be a key starting point for those trying to understand it (or perhaps to fight in it).' Annals of Human Biology
Contributors
Richard J. Andrew, Angelo Bisazza, Samuel F. Carriba, Patricia E. Cowell, Eric Damerose, Victor H. Denenberg, Chao Deng, Asif A. Ghazanfar, Onur Güntürkün, Mark D. Hauser, William D. Hopkins, Amy N. B. Johnston, Cory T. Miller, Lucia Regolin, Lesley L. Rogers, Steven Rose, Giorgio Vallortigara, J. Vauclair, J. A. S. Watkins, Daniel J. Weiss |
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Cambridge University Press |
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New York |
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Rogers,L. J. ; Andrew, R. |
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9780521781619 |
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Equine Behaviour @ team @ |
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4623 |
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Rogers, L.J. |
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Advantages and disadvantages of lateralization |
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2002 |
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126-153 |
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Cambridge University Press |
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New York |
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L. J. Rogers,; R. Andrew, |
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Equine Behaviour @ team @ L.J.Rogers+R.Andrew(eds)2002 |
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4624 |
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R. J. Andrew; J. A. S. Watkins (eds) |
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Evidence of cerebral lateralization from senses other than vision |
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2002 |
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365-382 |
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Cambridge University Press |
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New York |
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R. J. Andrew ; J. A. S. Watkins |
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Equine Behaviour @ team @ L.J.Rogers+R.Andrew(eds)2002 |
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4625 |
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Peterson R.O.; Jacobs A.K.; Drummer T.D.; Mech L.D.; Smith D.W. |
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Leadership behavior in relation to dominance and reproductive status in gray wolves, Canis lupus |
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2002 |
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Canadian Journal of Zoology |
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80 |
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1405-1412 |
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We analyzed the leadership behavior of breeding and nonbreeding gray wolves (Canis lupus) in three packs during winter in 1997-1999. Scent-marking, frontal leadership (time and frequency in the lead while traveling), initiation of activity, and nonfrontal leadership were recorded during 499 h of ground-based observations in Yellowstone National Park. All observed scent-marking (N = 158) was done by breeding wolves, primarily dominant individuals. Dominant breeding pairs provided most leadership, consistent with a trend in social mammals for leadership to correlate with dominance. Dominant breeding wolves led traveling packs during 64% of recorded behavior bouts (N = 591) and 71% of observed travel time (N = 64 h). During travel, breeding males and females led packs approximately equally, which probably reflects high parental investment by both breeding male and female wolves. Newly initiated behaviors (N = 104) were prompted almost 3 times more often by dominant breeders (70%) than by nonbreeders (25%). Dominant breeding females initiated pack activities almost 4 times more often than subordinate breeding females (30 vs. 8 times). Although one subordinate breeding female led more often than individual nonbreeders in one pack in one season, more commonly this was not the case. In 12 cases breeding wolves exhibited nonfrontal leadership. Among subordinate wolves, leadership behavior was observed in subordinate breeding females and other individuals just prior to their dispersal from natal packs. Subordinate wolves were more often found leading packs that were large and contained many subordinate adults.
Nous avons analysé le comportement de commandement chez des loups gris (Canis lupus) reproducteurs et non reproducteurs appartenant à trois meutes durant les hivers de 1997-1999. Le marquage d'odeurs, la position en tête de meute (la durée et la fréquence au cours des déplacements), l'initiation des activités et la prise de décisions ailleurs qu'en tête du groupe ont été notés pendant 499 h d'observations au sol dans le Parc national de Yellowstone. Tous les marquages (N = 158) ont été faits par des loups reproducteurs, surtout des individus dominants. Ce sont surtout les couples dominants qui assurent le commandement, en accord avec une tendance chez les mammifères sociaux chez lesquels la fonction de chef est en corrélation avec la dominance. Les loups reproducteurs dominants ont conduit les meutes en déplacement pendant 64 % (N = 591) des épisodes de comportement et pendant 71 % des épisodes de déplacement (N = 64 h). Les mâles et les femelles reproducteurs ont dirigé les meutes en déplacement à peu près également, ce qui reflète probablement l'investissement parental important aussi bien de la part des reproducteurs mâles que des femelles. Les comportements nouveaux (N = 104) ont été adoptés presque trois fois plus souvent par des reproducteurs dominants (70 %) que par des individus non reproducteurs (25 %). Des femelles reproductrices dominantes ont été instigatrices des activités de leur meute environ quatre fois plus souvent que les femelles reproductrices subordonnées (30 vs. 8 fois). Bien qu'une femelle reproductrice subordonnée ait pris la direction de sa meute plus souvent que les individus non reproducteurs au cours d'une saison, cela n'est pas habituel. Dans 12 cas, des loups reproducteurs ont pris la direction de leur meute sans être en tête. Chez les individus subordonnés, le comportement de commandement a été observé chez des femelles reproductrices et chez d'autres individus juste avant qu'ils ne quittent leur meute d'origine au moment de la dispersion. Les loups subordonnés mènent surtout de grands troupeaux qui comptent beaucoup d'individus subordonnés.[Traduit par la Rédaction] |
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