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Author |
Rogers, L. |
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Title |
Asymmetry of Motor Behavior and Sensory Perception: Which Comes First? |
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2020 |
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Symmetrie |
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Symmetrie |
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12 |
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5 |
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690 |
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development; motor asymmetry; visual lateralization; human fetus; chick embryo; sensory-motor interaction |
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By examining the development of lateralization in the sensory and motor systems of the human fetus and chick embryo, this paper debates which lateralized functions develop first and what interactions may occur between the different sensory and motor systems during development. It also discusses some known influences of inputs from the environment on the development of lateralization, particularly the effects of light exposure on the development of visual and motor lateralization in chicks. The effects of light on the human fetus are related in this context. Using the chick embryo as a model to elucidate the genetic and environmental factors involved in development of lateralization, some understanding has been gained about how these lateralized functions emerge. At the same time, the value of carrying out much more research on the development of the various types of lateralization has become apparent. |
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Equine Behaviour @ team @ |
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6610 |
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Author |
Vallortigara, G.; Andrew, R.J. |
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Title |
Differential involvement of right and left hemisphere in individual recognition in the domestic chick |
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Journal Article |
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Year |
1994 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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33 |
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1-2 |
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41-57 |
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Right hemisphere; Left hemisphere; Domestic fowl; Lateralization; Chick |
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Right hemisphere advantage in individual recognition (as shown by differences between response to strangers and companions) is clear in the domestic chick. Chicks using the left eye (and so, thanks to the complete optic decussation, predominantly the right hemisphere) discriminate between stranger and companion. Chicks using the right eye discriminate less clearly or not at all. The ability of left eyed chicks to respond to differences between strangers and companions stimuli is associated with a more general ability to detect and respond to novelty: this difference between left and right eyed chicks also holds for stimuli which are not social partners. The right hemisphere also shows advantage in tasks with a spatial component (topographical learning; response to change in the spatial context of a stimulus) in the chick, as in humans. Similar specialisations of the two hemispheres are also revealed in tests which involve olfactory cues presented by social partners. The special properties of the left hemisphere are less well established in the chick. Evidence reviewed here suggests that it tends to respond to selected properties of a stimulus and to use them to assign it to a category; such assignment then allows an appropriate response. When exposed to an imprinting stimulus (visual or auditory) a chick begins by using right eye or ear (suggesting left hemisphere control), and then shifts to the left eye or ear (suggesting right hemisphere control), as exposure continues. The left hemisphere here is thus involved whilst behaviour is dominated by vigorous response to releasing stimuli presented by an object. Subsequent learning about the full detailed properties of the stimulus, which is crucial for individual recognition, may explain the shift to right hemisphere control after prolonged exposure to the social stimulus. There is a marked sex difference in choice tests: females tend to choose companions in tests where males choose strangers. It is possible that this difference is specifically caused by stronger motivation to sustain social contact in female chicks, for which there is extensive evidence. However, sex differences in response to change in familiar stimuli are also marked in tests which do not involve social partners. Finally, in both sexes there are two periods during development in which there age-dependent shifts in bias to use one or other hemisphere. These periods (days 3-5 and 8-11) coincide with two major changes in the social behaviour of chicks reared by a hen in a normal brood. It is argued that one function of these periods is to bring fully into play the hemisphere most appropriate to the type of response to, and learning about, social partners which is needed at particular points in development. Parallels are discussed between the involvement of lateralised processes in the recognition of social partners in chicks and humans. |
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0376-6357 |
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Equine Behaviour @ team @ |
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5341 |
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Andrew, R.J. |
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Title |
Changes in visual responsiveness following intercollicular lesions and their effects on avoidance and attack |
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1974 |
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Brain, Behavior and Evolution |
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Brain Behav Evol |
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10 |
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4-5 |
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400-424 |
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Animals; Chickens; Humans; Male; Mutism; Superior Colliculi/*physiology; Tectum Mesencephali; Testosterone; Visual Fields; Vocalization, Animal |
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In the normal chick, conspicuous visual stimuli induce targetting and pecking together, with vocalization. All three are abolished by lesion of the intercollicular area (ICo) or of connections passing through its medial margin. After such lesions, chicks also cease to treat significant visual stimuli as if they were startling and exciting, and may delay response as a result. However, they are still able to recognise, orient accurately to, and respond appropriately to, a variety of complex visual stimuli (e.g. food grains, copulation object). In addition, they are little affected by strange surroundings. Lesion evidence suggests the mammalian subcollicular area to have similar functions to the ICo and to be homologous with it. A route (present in bird), which is well-known in mammals for its association with threat, defense and escape evoked by strange and frightening objects (amygdala-diencephalic periventricular system-central mesencephalic grey, A-DPS-CMG) is stimuli via the 2 ICo (subcollicular area). Two different mechanisms may be involved caudal to the ICo. One consists of tectal afferents which might modulate the evocation of targetting, pecking and other responses via the tectum. The other is the predorsal system of tectal efferents which may mediate such responses. Classical syndromes of tameness and unresponsiveness produced by various interruptions of the A-DPS-CMG route may depend on interruption of connections to these midbrain mechanisms. Attack is depressed by ICo lesions as one aspect of reduced responsiveness to conspicuous and startling visual stimuli. Avoidance, which is apparently mediated by a separate system, much as in Anura, is facilitated. |
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0006-8977 |
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PMID:1169102 |
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Equine Behaviour @ team @ |
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4626 |
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Author |
Rogers, L.J. |
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Title |
Evolution of hemispheric specialization: advantages and disadvantages |
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Journal Article |
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Year |
2000 |
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Brain and Language |
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Brain Lang |
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73 |
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2 |
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236-253 |
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Aggression/psychology; Animals; Behavior, Animal/physiology; Brain/*physiology; Chickens/physiology; *Evolution; Feeding Behavior/physiology; Functional Laterality/*physiology; Visual Fields/physiology; Visual Perception/physiology |
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Lateralization of the brain appeared early in evolution and many of its features appear to have been retained, possibly even in humans. We now have a considerable amount of information on the different forms of lateralization in a number of species, and the commonalities of these are discussed, but there has been relatively little investigation of the advantages of being lateralized. This article reports new findings on the differences between lateralized and nonlateralized chicks. The lateralized chicks were exposed to light for 24 h on day 19 of incubation, a treatment known to lead to lateralization of a number of visually guided responses, and the nonlateralized chicks were incubated in the dark. When they were feeding, the lateralized chicks were found to detect a stimulus resembling a raptor with shorter latency than nonlateralized chicks. This difference was not a nonspecific effect caused by the light-exposed chicks being more distressed by the stimulus. Instead, it appears to be a genuine advantage conferred by having a lateralized brain. It is suggested that having a lateralized brain allows dual attention to the tasks of feeding (right eye and left hemisphere) and vigilance for predators (left eye and right hemisphere). Nonlateralized chicks appear to perform these dual tasks less efficiently than lateralized ones. Reference is made to other species in discussing these results. |
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Division of Zoology, University of New England, Armidale, New South Wales, Australia. lrogers@metz.une.edu.au |
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0093-934X |
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PMID:10856176 |
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Equine Behaviour @ team @ |
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4621 |
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Foster, T.M.; Temple, W.; Cameron, B.; Poling, A. |
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Demand curves for food in hens: Similarity under fixed-ratio and progressive-ratio schedules |
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Journal Article |
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1997 |
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Behavioural Processes |
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Behav. Process. |
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39 |
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2 |
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177-185 |
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Progressive-ratio schedule; Fixed-ratio schedule; Demand curves; Behavioral economics; Animal welfare; Keypecking; Chickens |
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Demand curves were generated for five domestic hens under progressive-ratio 5 schedules of food delivery and under fixed-ratio schedules of food delivery that began at fixed-ratio 5 and were incremented by 5 each session. All sessions ended after 10 consecutive minutes without a response. Although response rates at a given ratio were higher under the progressive-ratio schedule, all hens completed higher ratios under the fixed-ratio schedule. Similar, but not identical, demand curves were generated under progressive-ratio and fixed-ratio schedules. Under both schedules, consumption (reinforcers earned) decreased as cost (ratio size) increased. Data generally were well described by an equation in which elasticity of demand is constant, although an equation in which elasticity could vary accounted for slightly more of the variance. |
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Equine Behaviour @ team @ |
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3603 |
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Author |
Werner, C. W.; Rehkämper, G. |
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Discrimination of multidimensional geometrical figures by chickens: categorization and pattern-learning |
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1999 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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2 |
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1 |
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27-40 |
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Domestic chicken – Integral compound – figures – Multidimensional stimulus discrimination |
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Japanese bantam hens were trained to discriminate between geometrical figures varying along four integral dimensions. Only one dimension predicted food: selections of sharp-cornered figures were reinforced, while selections of rounded figures were not. In experiment 1, hens were subsequently trained to discriminate between nine figure pairs in a simultaneous discrimination task. Because single pairs contained multiple redundant cues, whereas the relevant dimension was obvious only across stimulus pairs, the results revealed effects of both generalization and reversal learning. Accordingly, learning speed was enhanced for later discriminations. Experiment 2 tested the hens“ transfer performance to unknown pairs, following experience of 9 or 18 figure pairs. Four of seven hens showed reliable transfer after experience with 9 figures, but only three showed transfer after experience with 18 figures, indicating lower transfer with higher number of stimulus pairs learned. In experiment 3, hens were trained to discriminate 27 figure pairs. Discrimination ratios further decreased and the groups of pairs differed significantly in their ratios of discrimination. Individual hens” pecking behaviour was analysed in relation to each dimension of single figures and in relation to relative differences in the levels of dimensions between paired figures. Hens were shown to be oriented towards irrelevant information and more towards relational and configurational than elemental and dimensional aspects. The results are discussed in the biological context of individual recognition in chickens" dominance hierarchies, in which we suppose that chickens identify individual flock mates by representation of their visual pattern rather than by single characteristics. |
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Equine Behaviour @ team @ |
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3359 |
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Tommasi, L.; Vallortigara, G. |
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Searching for the center: spatial cognition in the domestic chick (Gallus gallus) |
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2000 |
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Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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26 |
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4 |
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477-486 |
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Animals; Behavior, Animal/physiology; Chickens; Cognition/*physiology; Learning/physiology; Male; Space Perception/*physiology; Spatial Behavior/*physiology |
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Chicks learned to find food hidden under sawdust by ground-scratching in the central position of the floor of a closed arena. When tested inan arena of identical shape but a larger area, chicks searched at 2 different locations, one corresponding to the correct distance (i.e., center) in the smaller (training) arena and the other to the actual center of the test arena. When tested in an arena of the same shape but a smaller area, chicks searched in the center of it. These results suggest that chicks are able to encode information on the absolute and relative distance of the food from the walls of the arena. After training in the presence of a landmark located at the center of the arena, animals searched at the center even after the removal of the landmark. Marked changes in the height of the walls of the arena produced some displacement in searching behavior, suggesting that chicks used the angular size of the walls to estimate distances. |
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Department of General Psychology, University of Padua, Italy |
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0097-7403 |
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PMID:11056887 |
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Equine Behaviour @ team @ |
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2774 |
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Author |
Swanson, J.C. |
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Title |
Farm animal well-being and intensive production systems |
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Journal Article |
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1995 |
Publication |
Journal of Animal Science |
Abbreviated Journal |
J. Anim Sci. |
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73 |
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9 |
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2744-2751 |
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Animal Husbandry/legislation & jurisprudence/*standards; Animal Rights/legislation & jurisprudence/standards; Animal Welfare/legislation & jurisprudence/*standards; Animals; Animals, Domestic/*growth & development/*physiology; Breeding/legislation & jurisprudence/*standards; Cattle; Chickens; Environment; Reproduction/physiology; Sheep; Swine |
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Animal welfare, or well-being, is a social issue with ethical, scientific, political, and aesthetic properties. Answering questions about the welfare of animals requires scientific definition, assessment, solutions, and public acceptance. With respect to the actual well-being of the animal, most issues are centered on how the animal “feels” when managed within a specific level of confinement, during special agricultural practices (e.g., tail docking, beak trimming, etc.) and handling. Questions of this nature may require exploration of animal cognition, motivation, perception, and emotional states in addition to more commonly recognized indicators of well-being. Several general approaches have emerged for solving problems concerning animal well-being in intensive production systems: environmental, genetic, and therapeutic. Environmental approaches involve modifying existing systems to accommodate specific welfare concerns or development of alternative systems. Genetic approaches involve changing the behavioral and (or) physiological nature of the animal to reduce or eliminate behaviors that are undesirable within intensive system. Therapeutic approaches of a physical (tail docking, beak trimming) and physiological (drug and nutritional therapy) nature bring both concern and promise with regard to the reduction of confinement stress. Finally, the recent focus on commodity quality assurance programs may indirectly provide benefits for animal well-being. Although research in the area of animal well-being will provide important information for better animal management, handling, care, and the physical design of intensive production systems there is still some uncertainty regarding public acceptance. The aesthetics of modern intensive production systems may have as much to do with public acceptance as with science. |
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Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506, USA |
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0021-8812 |
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PMID:8582867 |
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Equine Behaviour @ team @ |
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2752 |
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Beerwerth, W.; Schurmann, J. |
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[Contribution to the ecology of mycobacteria] |
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1969 |
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Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. 1. Abt. Medizinisch-Hygienische Bakteriologie, Virusforschung und Parasitologie. Originale |
Abbreviated Journal |
Zentralbl Bakteriol [Orig] |
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211 |
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1 |
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58-69 |
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*Animal Feed; Animals; Cattle; Chickens; Ecology; Feces/*microbiology; *Food Microbiology; Germany, West; Horses; Hydroxides; Mycobacterium/classification/*isolation & purification; Mycobacterium tuberculosis/isolation & purification; Oxalates; *Sewage; Sheep; Sodium; *Soil Microbiology; Swine; *Water Microbiology |
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German |
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Zur Okologie der Mykobakterien |
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0372-8110 |
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PMID:4989344 |
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Equine Behaviour @ team @ |
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2743 |
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Yamada, T.; Rojanasuphot, S.; Takagi, M.; Wungkobkiat, S.; Hirota, T. |
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Studies on an epidemic of Japanese encephalitis in the northern region of Thailand in 1969 and 1970 |
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1971 |
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Biken Journal |
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Biken J |
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14 |
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3 |
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267-296 |
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Adolescent; Adult; Animals; Arboviruses/immunology; Buffaloes; Cattle; Chickens; Child; Child, Preschool; Cross Reactions; Culicidae; Dengue Virus/immunology; Disease Outbreaks; Ducks; Ecology; Encephalitis Virus, Japanese/immunology/isolation & purification; Encephalitis, Japanese/cerebrospinal fluid/*epidemiology/immunology/microbiology/mortality; Female; Hemagglutination Inhibition Tests; Hemorrhagic Fevers, Viral/epidemiology; Horses; Humans; Infant; Male; Mice; Neutralization Tests; Swine; Thailand |
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0006-2324 |
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PMID:4400462 |
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Equine Behaviour @ team @ |
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2728 |
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