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Bigiani, A.; Mucignat-Caretta, C.; Montani, G.; Tirindelli, R. |
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Title |
Pheromone reception in mammals |
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Journal Article |
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2005 |
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Reviews of Physiology, Biochemistry and Pharmacology |
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154 |
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1-35 |
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Pheromonal communication is the most convenient way to transfer information regarding gender and social status in animals of the same species with the holistic goal of sustaining reproduction. This type of information exchange is based on pheromones, molecules often chemically unrelated, that are contained in body fluids like urine, sweat, specialized exocrine glands, and mucous secretions of genitals. So profound is the relevance of pheromones over the evolutionary process that a specific peripheral organ devoted to their recognition, namely the vomeronasal organ of Jacobson, and a related central pathway arose in most vertebrate species. Although the vomeronasal system is well developed in reptiles and amphibians, most mammals strongly rely on pheromonal communication. Humans use pheromones too; evidence on the existence of a specialized organ for their detection, however, is very elusive indeed. In the present review, we will focus our attention on the behavioral, physiological, and molecular aspects of pheromone detection in mammals. We will discuss the responses to pheromonal stimulation in different animal species, emphasizing the complicacy of this type of communication. In the light of the most recent results, we will also discuss the complex organization of the transduction molecules that underlie pheromone detection and signal transmission from vomeronasal neurons to the higher centers of the brain. Communication is a primary feature of living organisms, allowing the coordination of different behavioral paradigms among individuals. Communication has evolved through a variety of different strategies, and each species refined its own preferred communication medium. From a phylogenetic point of view, the most widespread and ancient way of communication is through chemical signals named pheromones: it occurs in all taxa, from prokaryotes to eukaryotes. The release of specific pheromones into the environment is a sensitive and definite way to send messages to other members of the same species. Therefore, the action of an organism can alter the behavior of another organism, thereby increasing the fitness of either or both. Albeit slow in transmission and not easily modulated, pheromones can travel around objects in the dark and over long distances. In addition, they are emitted when necessary and their biosynthesis is usually economic. In essence, they represent the most efficient tool to refine the pattern of social behaviors and reproductive strategies. © Springer-Verlag 2005. |
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Università di Parma, Dipartimento di Neuroscienze, Sezione di Fisiologia, Via Volturno 39, 43100 Parma, Italy |
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Equine Behaviour @ team @ |
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4570 |
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Apfelbach, R.; Blanchard, C.D.; Blanchard, R.J.; Hayes, R.A.; McGregor, I.S. |
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The effects of predator odors in mammalian prey species: A review of field and laboratory studies |
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2005 |
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Neuroscience and Biobehavioral Reviews |
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29 |
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8 |
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1123-1144 |
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Behavioral suppression; Defensive behavior; Endocrine effects; Neural effects; Predator odor; Small mammals |
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Prey species show specific adaptations that allow recognition, avoidance and defense against predators. For many mammalian species this includes sensitivity towards predator-derived odors. The typical sources of such odors include predator skin and fur, urine, feces and anal gland secretions. Avoidance of predator odors has been observed in many mammalian prey species including rats, mice, voles, deer, rabbits, gophers, hedgehogs, possums and sheep. Field and laboratory studies show that predator odors have distinctive behavioral effects which include (1) inhibition of activity, (2) suppression of non-defensive behaviors such as foraging, feeding and grooming, and (3) shifts to habitats or secure locations where such odors are not present. The repellent effect of predator odors in the field may sometimes be of practical use in the protection of crops and natural resources, although not all attempts at this have been successful. The failure of some studies to obtain repellent effects with predator odors may relate to (1) mismatches between the predator odors and prey species employed, (2) strain and individual differences in sensitivity to predator odors, and (3) the use of predator odors that have low efficacy. In this regard, a small number of recent studies have suggested that skin and fur-derived predator odors may have a more profound lasting effect on prey species than those derived from urine or feces. Predator odors can have powerful effects on the endocrine system including a suppression of testosterone and increased levels of stress hormones such as corticosterone and ACTH. Inhibitory effects of predator odors on reproductive behavior have been demonstrated, and these are particularly prevalent in female rodent species. Pregnant female rodents exposed to predator odors may give birth to smaller litters while exposure to predator odors during early life can hinder normal development. Recent research is starting to uncover the neural circuitry activated by predator odors, leading to hypotheses about how such activation leads to observable effects on reproduction, foraging and feeding. © 2005 Elsevier Ltd. All rights reserved. |
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School of Psychology, University of Sydney, Sydney, NSW 2006, Australia |
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Equine Behaviour @ team @ |
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4565 |
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Grogan, E.H.; McDonnell, S.M. |
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Title |
Mare and Foal Bonding and Problems |
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2005 |
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Clinical Techniques in Equine Practice |
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4 |
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3 |
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228-237 |
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Equine; bonding; behavior; mare; neonatal; foal; inadequate maternal behavior; orphan foal; nurse or foster mare |
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A number of specific behavioral responses have been identified in mares and foals as the presumed behavioral interactive sequences supporting bonding. With the exception of the severely physically compromised foal, most failures of the mare foal bond appear to result from inadequate behavior of the mare. Six distinct forms of maternal behavior problems include ambivalence of the mare toward her foal, fear of the foal, nursing only avoidance of the foal, extreme protectiveness of the foal that becomes problematic in domestic confinement, savage attack (true rejection), and stealing or adoption of an alien foal. Management of maternal behavior problem cases in which the pair cannot be salvaged include foster (or nurse mares) and hand-rearing methods. Also presented are current practical resources related to managing certain types of inadequate maternal behavior and for rearing the orphaned foal. |
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Equine Behaviour @ team @ |
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4671 |
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Tizo-Pedroso, E.; Del-Claro, K. |
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Title |
Matriphagy In The Neotropical Pseudoscorpion Paratemnoides Nidificator (Balzan 1888) (Atemnidae) |
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2005 |
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Journal of Arachnology |
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33 |
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3 |
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873-877 |
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We studied the natural history and social behavior of Paratemnoides nidificator (Balzan 1888) in a tropical savanna system. Females were responsible for all nymphal care. We observed, for the first time in pseudoscorpions, the occurrence of matriphagy behavior by the offspring. During conditions of food deprivation, the mother went out of the nest and passively awaited the protonymphs' attack, not reacting to the capture nor to the nymphs feeding on her body. We suggest that this extreme form of parental care, matriphagy, can reduce cannibalism among protonymphs and facilitate the evolution of social behavior in pseudoscorpions. RESUMO Nos estudamos a historia natural e o comportamento social de Paratemnoides nidificator (Balzan 1888) na regiao dos cerrados. As femeas foram responsaveis por todo o cuidado as ninfas. Nos observamos, pela primeira vez em pseudoescorpioes, a ocorrencia de matrifagia pela prole. Em condicoes de fome, a mae deixa o ninho e passivamente espera que as protoninfas a ataquem, nao reagindo nem a captura, nem a alimentacao das ninfas sobre seu corpo. Nos sugerimos que esta forma extrema de cuidado parental, matrifagia, possa reduzir o canibalismo entre as protoninfas e assim facilitar a evolucao de comportamento social em pseudoescorpioes. |
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Equine Behaviour @ team @ |
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4718 |
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Author |
Mills, D.S.; McDonnell, S. M. (eds) |
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Title |
The Domestic Horse |
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2005 |
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Humans have had a profound influence on the horse since its domestication in the late Neolithic period. Used for transport, labour, food and recreation, horses have become important in many facets of our society. Daniel Mills and Sue McDonnell have produced an exceptional account of our current knowledge of the development and management of the behaviour of the horse, from its wild roots. The Domestic Horse brings together, for the first time, an unrivalled collection of international scientific authors to write on the latest findings concerning the behaviour and welfare of this beautiful animal. Illustrated throughout, The Domestic Horse will appeal to animal scientists, those working with horses in a professional capacity and the owner/enthusiast. It also provides sound complementary reading for animal/equine science courses and veterinary students. |
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Cambridge University Press |
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Camebridge |
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Mills, D.S.; McDonnell, S. M. |
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9780521891134 |
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Equine Behaviour @ team @ |
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4750 |
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Author |
Hausberger, M.; Richard-Yris, M.-A. |
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Title |
Individual differences in the domestic horse, origins, development and stability |
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2005 |
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The domestic horse : the origins, development, and management of its behaviour |
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33-52 |
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Cambridge University Press 2005 |
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Cambridge |
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Mills, D.S.; McDonnell, |
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13 978-0-521-81414-6 |
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Equine Behaviour @ team @ Feh2005 |
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4819 |
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Klüwer, C. |
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Zur Arbeit mit dem Pferd in Psychiatrie und Psychotherapie. Versuch einer theoretischen Besinnung auf grundlegende Möglichkeiten zwischen Mensch und Pferd. |
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2005 |
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Die Arbeit mit dem Pferd in Psychiatrie und Psychotherapie |
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5 |
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FN-Verlag |
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Warendorf |
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DKThR |
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Equine Behaviour @ team @ |
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5065 |
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Author |
Mehlem M. |
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Title |
Angst und Pferd – Wege zur Bewältigung und Integration von Ängsten mit Hilfe der Pferde. |
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2005 |
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Psychotherapie mit dem Pferd – Beiträge aus der Praxis |
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20-37 |
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FN-Verlag |
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Warendorf |
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DKThR |
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Equine Behaviour @ team @ |
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5068 |
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Author |
Stürmer, K. |
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Title |
Untersuchungen zum Einfluss der Fütterung auf den Säure-Basen-Haushalt bei Ponys |
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2005 |
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In der praktischen Pferdefütterung kommen regelmäßig Substanzen zum Einsatz, die
einen erheblichen Einfluss auf den Säure-Basen-Haushalt ausüben. Andererseits können
Manipulationen des Säure-Basen-Haushaltes in der Diätetik erwünscht sein, z.B. bei
Harnsteinen oder hyperkaliämischer periodischer Paralyse. Verschiebungen im Säure-
Basen-Gleichgewicht treten – unabhängig von der Fütterung – außerdem bei starker
körperlicher Aktivität auf, eine eventuelle Prophylaxe durch die Ernährung wird
ebenfalls diskutiert. Der Einfluss der Fütterung auf den Säure-Basen-Haushalt ist beim
Pferd bisher nur wenig und nicht systematisch untersucht, während sich viele Arbeiten
mit dem Effekt körperlicher Belastung beschäftigen. Analogieschlüsse zu anderen
Spezies müssen äußerst vorsichtig betrachtet werden, da die Absorption von am Säure-
Basen-Haushalt beteiligten Substanzen beim Pferd Unterschiede zu anderen Spezies
aufweist (Meyer, 1982).
In der vorliegenden Untersuchung sollte daher der Effekt von verschiedenen Chloriden
(Natriumchlorid, Kalziumchlorid, Ammoniumchlorid) auf den Säure-Basen-Haushalt bei
Ponys geprüft werden. In den ersten Versuchsdurchgängen wurden für Kleinpferde im
Erhaltungsstoffwechsel für diesen Zweck Rationen mit sehr hohen Heuanteilen
verwendet. Trotz hoher Dosen des bei verschiedenen Spezies stark säuernden
Ammoniumchlorids traten bei den Ponys nur relativ kleine Effekte auf. Bei der weiteren
Durchsicht des Schrifttums fiel auf, dass Einzelbeobachtungen zu stark säuernden
Effekten nur bei Rationen mit hohem Anteil an Kraftfutter und geringem Anteil an
Rauhfutter auftraten. Daher wurde der Effekt von Ammoniumchlorid auf einer stark
kraftfutterhaltigen Ration nochmals überprüft. |
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Ph.D. thesis |
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Equine Behaviour @ team @ |
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5162 |
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Author |
Parrish, J. K.; Viscido, S. V. |
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Title |
Traffic rules of fish schools: A review of agent-based approaches. |
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2005 |
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Self-organisation and the evolution of social behaviour. |
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50-80 |
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Cambridge University Press |
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Cambridge |
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C. K. Hemelrijk |
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Equine Behaviour @ team @ |
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5419 |
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