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Author |
Hardy, J.L. |
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Title  |
The ecology of western equine encephalomyelitis virus in the Central Valley of California, 1945-1985 |
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Journal Article |
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Year |
1987 |
Publication |
The American Journal of Tropical Medicine and Hygiene |
Abbreviated Journal |
Am J Trop Med Hyg |
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Volume |
37 |
Issue |
3 Suppl |
Pages |
18s-32s |
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Keywords |
Aedes/microbiology; Animals; Birds; California; Culex/microbiology; Encephalitis Virus, Western Equine/*physiology; Encephalomyelitis, Equine/*history/microbiology/transmission/veterinary; History, 20th Century; Horse Diseases/history/transmission; Horses; Humans; Insect Vectors/microbiology; Mammals |
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Abstract |
Reeves' concept of the summer transmission cycle of western equine encephalomyelitis virus in 1945 was that the virus was amplified in a silent transmission cycle involving mosquitoes, domestic chickens, and possibly wild birds, from which it could be transmitted tangentially to and cause disease in human and equine populations. Extensive field and laboratory studies done since 1945 in the Central Valley of California have more clearly defined the specific invertebrate and vertebrate hosts involved in the basic virus transmission cycle, but the overall concept remains unchanged. The basic transmission cycle involves Culex tarsalis as the primary vector mosquito species and house finches and house sparrows as the primary amplifying hosts. Secondary amplifying hosts, upon which Cx. tarsalis frequently feeds, include other passerine species, chickens, and possibly pheasants in areas where they are abundant. Another transmission cycle that most likely is initiated from the Cx. tarsalis-wild bird cycle involves Aedes melanimon and the blacktail jackrabbit. Like humans and horses, California ground squirrels, western tree squirrels, and a few other wild mammal species become infected tangentially with the virus but do not contribute significantly to virus amplification. |
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Department of Biomedical and Environmental Health Sciences, School of Public Health, University of California, Berkeley 94720 |
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0002-9637 |
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PMID:3318522 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2677 |
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Author |
Callinan, A.P. |
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Title |
The ecology of the free-living stages of Trichostrongylus axei |
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Journal Article |
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Year |
1978 |
Publication |
International Journal for Parasitology |
Abbreviated Journal |
Int J Parasitol |
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Volume |
8 |
Issue |
6 |
Pages |
453-456 |
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Keywords |
Animals; Ecology; Horses; Larva/growth & development; Sheep; Trichostrongyloidea/*growth & development |
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0020-7519 |
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Notes |
PMID:748218 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2697 |
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Author |
Hughes, K.L.; Sulaiman, I. |
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Title |
The ecology of Rhodococcus equi and physicochemical influences on growth |
Type |
Journal Article |
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Year |
1987 |
Publication |
Veterinary Microbiology |
Abbreviated Journal |
Vet Microbiol |
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Volume |
14 |
Issue |
3 |
Pages |
241-250 |
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Keywords |
Animals; Feces/microbiology; Horses; Hydrogen-Ion Concentration; Rhodococcus/*growth & development; *Soil Microbiology; Temperature |
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Abstract |
Growth of Rhodococcus equi was studied in vitro. Optimal growth occurred under aerobic conditions between pH 7.0 and 8.5, at 30 degrees C. R. equi survived better in a neutral soil (pH 7.3) than it did in two acid soils (pH less than 5.5). It grew substantially better in soils enriched with faeces than in soils alone. Simple organic acids in horse dung, especially acetate and propionate, appear to be important in supporting growth of R. equi in the environment. The ecology of R. equi can be best explained by an environmental cycle allowing its proliferation in dung, influenced by management, grazing behaviour and prevailing climatic conditions. Preventive measures should be aimed at reducing or avoiding focal areas of faecal contamination in the environment. |
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School of Veterinary Science, University of Melbourne, Parkville, Vic., Australia |
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0378-1135 |
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PMID:3672866 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2678 |
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Author |
Nosek, J. |
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Title |
The ecology and public health importance of Dermacentor marginatus and D. reticulatus ticks in Central Europe |
Type |
Journal Article |
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Year |
1972 |
Publication |
Folia Parasitologica |
Abbreviated Journal |
Folia Parasitol (Praha) |
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Volume |
19 |
Issue |
1 |
Pages |
93-102 |
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Keywords |
Animals; Arthropod Vectors; Birds; Cattle; Czechoslovakia; Deer; Dermacentor/physiology; Dogs; Ecology; Encephalitis, Tick-Borne; Europe; Female; Goats; Horses; Insectivora; Male; Mice; Rodentia; Sheep; Swine; *Ticks |
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0015-5683 |
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Notes |
PMID:4670812 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2720 |
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Author |
Hall, R.A.; Broom, A.K.; Smith, D.W.; Mackenzie, J.S. |
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Title |
The ecology and epidemiology of Kunjin virus |
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Journal Article |
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Year |
2002 |
Publication |
Current Topics in Microbiology and Immunology |
Abbreviated Journal |
Curr Top Microbiol Immunol |
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Volume |
267 |
Issue |
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Pages |
253-269 |
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Keywords |
Animals; Culicidae/virology; Ecosystem; Horse Diseases/etiology; Horses; Humans; Insect Vectors; Population Surveillance; West Nile Fever/*epidemiology/*etiology/veterinary; West Nile virus/classification/genetics/immunology/*isolation & purification |
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Abstract |
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Address |
Department of Microbiology and Parasitology, School of Molecular and Microbial Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia |
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0070-217X |
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PMID:12082993 |
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Equine Behaviour @ team @ |
Serial |
2642 |
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Author |
Hare, B.; Brown, M.; Williamson, C.; Tomasello, M. |
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Title |
The domestication of social cognition in dogs |
Type |
Journal Article |
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Year |
2002 |
Publication |
Science (New York, N.Y.) |
Abbreviated Journal |
Science |
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Volume |
298 |
Issue |
5598 |
Pages |
1634-1636 |
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Keywords |
Animals; *Animals, Domestic; *Behavior, Animal; *Cognition; *Cues; *Dogs; Food; Humans; Memory; Pan troglodytes; *Social Behavior; Species Specificity; Vision; Wolves |
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Abstract |
Dogs are more skillful than great apes at a number of tasks in which they must read human communicative signals indicating the location of hidden food. In this study, we found that wolves who were raised by humans do not show these same skills, whereas domestic dog puppies only a few weeks old, even those that have had little human contact, do show these skills. These findings suggest that during the process of domestication, dogs have been selected for a set of social-cognitive abilities that enable them to communicate with humans in unique ways. |
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Address |
Department of Anthropology, Harvard University, Cambridge, MA 02138, USA. bhare@fas.harvard.edu |
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1095-9203 |
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PMID:12446914 |
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Call Number |
refbase @ user @ |
Serial |
595 |
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Author |
Viscido, S.V.; Miller, M.; Wethey, D.S. |
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Title |
The dilemma of the selfish herd: the search for a realistic movement rule |
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Journal Article |
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Year |
2002 |
Publication |
Journal of theoretical biology |
Abbreviated Journal |
J. Theor. Biol. |
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Volume |
217 |
Issue |
2 |
Pages |
183-194 |
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Keywords |
Animals; *Behavior, Animal; *Mass Behavior; Models, Biological; *Motor Activity; Predatory Behavior |
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Abstract |
The selfish herd hypothesis predicts that aggregations form because individuals move toward one another to minimize their own predation risk. The “dilemma of the selfish herd” is that movement rules that are easy for individuals to follow, fail to produce true aggregations, while rules that produce aggregations require individual behavior so complex that one may doubt most animals can follow them. If natural selection at the individual level is responsible for herding behavior, a solution to the dilemma must exist. Using computer simulations, we examined four different movement rules. Relative predation risk was different for all four movement rules (p<0.05). We defined three criteria for measuring the quality of a movement rule. A good movement rule should (a) be statistically likely to benefit an individual that follows it, (b) be something we can imagine most animals are capable of following, and (c) result in a centrally compact flock. The local crowded horizon rule, which allowed individuals to take the positions of many flock-mates into account, but decreased the influence of flock-mates with distance, best satisfied these criteria. The local crowded horizon rule was very sensitive to the animal's perceptive ability. Therefore, the animal's ability to detect its neighbors is an important factor in the dynamics of group formation. |
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Department of Biological Sciences, University of South Carolina, Columbia, SC, 29208, USA. viscido@u.washington.edu |
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0022-5193 |
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Notes |
PMID:12202112 |
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no |
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Call Number |
refbase @ user @ |
Serial |
554 |
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Author |
Odberg, F.O.; Bouissou, M.F. |
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Title |
The development of equestrianism from the baroque period to the present day and its consequences for the welfare of horses |
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Journal Article |
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Year |
1999 |
Publication |
Equine Veterinary Journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
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Issue |
28 |
Pages |
26-30 |
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Keywords |
Animal Husbandry/*history/standards; Animal Welfare/*history; Animals; Bonding, Human-Pet; History, 15th Century; History, 16th Century; History, 17th Century; History, 18th Century; History, 19th Century; History, 20th Century; *Horses; Humans; Stress/etiology/history/veterinary |
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Many saddle horses are slaughtered at a young age which could be indicative of a welfare problem. Bad riding is probably an underestimated source of poor welfare. Widespread knowledge of 'academic' riding should be encouraged and should be beneficial to all horses, at all schooling levels, for all purposes. In particular, 18th century principles tend to be forgotten and in this article the authors illustrate some differences to modern dressage. Various suggestions are made in order to improve welfare. |
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University of Ghent, Faculty of Veterinary Medicine, Heidestraat 19, B-9820, Merelbeke, Belgium |
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Notes |
PMID:11314231 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3729 |
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Author |
Schmidt, R.; Amrhein, V.; Kunc, H.P.; Naguib, M. |
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Title |
The day after: effects of vocal interactions on territory defence in nightingales |
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Journal Article |
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Year |
2007 |
Publication |
The Journal of Animal Ecology |
Abbreviated Journal |
T. J. Anim. Ecol. |
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Volume |
76 |
Issue |
1 |
Pages |
168-173 |
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Keywords |
Aggression; Animals; Male; Songbirds/*physiology; *Territoriality; Time Factors; Vocalization, Animal/*physiology |
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Abstract |
1. Models on territory acquisition and tenure predict that territorial animals benefit by adjusting territorial defence behaviour to previous challenges they had experienced within the socially complex environment of communication networks. 2. Here, we addressed such issues of social cognition by investigating persisting effects of vocal contests on territory defence behaviour in nightingales Luscinia megarhynchos (Brehm). 3. Using interactive playback during nocturnal song of subjects, a rival was simulated to countersing either aggressively (by song overlapping) or moderately (by song alternating) from outside the subjects' territory. Thereby, the time-specific singing strategy provided an experimentally controlled source of information on the motivation of an unfamiliar rival. 4. Expecting that nightingales integrate information with time, the same rival was simulated to return as a moderately singing intruder on the following morning. 5. The results show that the vigour with which male nightingales responded to the simulated intrusion of an opponent during the day depended on the nature of the nocturnal vocal interaction experienced several hours before. 6. Males that had received the song overlapping playback the preceding night approached the simulated intruder more quickly and closer and sang more songs near the loudspeaker than did males that had received a song alternating playback. 7. This adjustment of territory defence strategies depending on information from prior signalling experience suggests that integrating information with time plays an important part in territory defence by affecting a male's decision making in a communication network. |
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Department of Animal Behaviour, Bielefeld University, PO Box 100 131, D-33501 Bielefeld, Germany. rouven.schmidt@uni-bielefeld.de |
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0021-8790 |
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PMID:17184365 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2749 |
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Author |
Whiten, A.; Boesch, C. |
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Title |
The cultures of chimpanzees |
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Journal Article |
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Year |
2001 |
Publication |
Scientific American |
Abbreviated Journal |
Sci Am |
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Volume |
284 |
Issue |
1 |
Pages |
60-67 |
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Keywords |
Animals; *Behavior, Animal; Culture; Feeding Behavior; Grooming; Hominidae; Humans; Pan troglodytes/*physiology |
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Address |
University of St. Andrews |
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0036-8733 |
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PMID:11132425 |
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Call Number |
refbase @ user @ |
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740 |
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