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Author |
Ward, M.P.; Ramsay, B.H.; Gallo, K. |
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Title |
Rural cases of equine West Nile virus encephalomyelitis and the normalized difference vegetation index |
Type |
Journal Article |
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Year |
2005 |
Publication  |
Vector Borne and Zoonotic Diseases (Larchmont, N.Y.) |
Abbreviated Journal |
Vector Borne Zoonotic Dis |
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Volume |
5 |
Issue |
2 |
Pages |
181-188 |
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Keywords |
Animals; Biomass; Cluster Analysis; Disease Outbreaks/veterinary; Ecology; *Geographic Information Systems; Horse Diseases/*epidemiology; Horses; Indiana/epidemiology; Plants; Population Surveillance; Rural Health; Seasons; Topography, Medical/*methods; West Nile Fever/epidemiology/*veterinary |
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Abstract |
Data from an outbreak (August to October, 2002) of West Nile virus (WNV) encephalomyelitis in a population of horses located in northern Indiana was scanned for clusters in time and space. One significant (p = 0.04) cluster of case premises was detected, occurring between September 4 and 10 in the south-west part of the study area (85.70 degrees N, 45.50 degrees W). It included 10 case premises (3.67 case premises expected) within a radius of 2264 m. Image data were acquired by the Advanced Very High Resolution Radiometer (AVHRR) sensor onboard a National Oceanic and Atmospheric Administration polar-orbiting satellite. The Normalized Difference Vegetation Index (NDVI) was calculated from visible and near-infrared data of daily observations, which were composited to produce a weekly-1km(2) resolution raster image product. During the epidemic, a significant (p < 0.01) decrease (0.025 per week) in estimated NDVI was observed at all case and control premise sites. The median estimated NDVI (0.659) for case premises within the cluster identified was significantly (p < 0.01) greater than the median estimated NDVI for other case (0.571) and control (0.596) premises during the same period. The difference in median estimated NDVI for case premises within this cluster, compared to cases not included in this cluster, was greatest (5.3% and 5.1%, respectively) at 1 and 5 weeks preceding occurrence of the cluster. The NDVI may be useful for identifying foci of WNV transmission. |
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Department of Veterinary Pathobiology, Purdue University School of Veterinary Medicine, West Lafayette, Indiana, USA. mward@cvm.tamu.edu |
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English |
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1530-3667 |
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PMID:16011435 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2627 |
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Author |
Berger, J |
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Title |
Wild horses of the Great Basin |
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Book Whole |
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Year |
1986 |
Publication |
University of Chicago Press, |
Abbreviated Journal |
Univ. of Chic. Press |
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Keywords |
wildlife equine behaviour ecology |
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Describes the behavior of wild horses living in the Great Basin Desert of Nevada and discusses the role of the horses in the area's ecology |
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University of Chicago Press |
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Chicago |
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0-226-04367-3 |
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refbase @ user @ |
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659 |
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Author |
Czaran, T. |
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Title |
Game theory and evolutionary ecology: Evolutionary Games & Population Dynamics by J. Hofbauer and K. Sigmund, and Game Theory & Animal Behaviour, edited by L.A. Dugatkin and H.K. Reeve |
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Journal Article |
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Year |
1999 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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Volume |
14 |
Issue |
6 |
Pages |
246-247 |
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Keywords |
Game theory; Evolutionary ecology; Population dynamics; Ethology |
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refbase @ user @ |
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485 |
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Author |
Healy,S.; Braithwaite, V |
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Title |
Cognitive ecology: a field of substance? |
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Journal Article |
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Year |
2000 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends. Ecol. Evol |
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Volume |
15 |
Issue |
1 |
Pages |
22-26 |
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Keywords |
Cognitive ecology; Neuroethology; Cognition; Ecology; Evolution; Orientation mechanisms |
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Abstract |
In 1993, Les Real invented the label 'cognitive ecology'. This label was intended for work that brought cognitive science and behavioural ecology together. Real's article stressed the importance of such an approach to the understanding of behaviour. At the end of a decade in which more interdisciplinary work on behaviour has been seen than for many years, it is time to assess whether cognitive ecology is a label describing an active field. |
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Division of Biological Sciences, King's Buildings, University of Edinburgh, West Mains Road, Edinburgh, UK EH9 3JT |
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English |
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ISSN |
0169-5347 |
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Notes |
PMID:10603501 |
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no |
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Call Number |
refbase @ user @ |
Serial |
837 |
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Author |
Taberlet, P.; Waits, L.P.; Luikart, G. |
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Title |
Noninvasive genetic sampling: look before you leap |
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Journal Article |
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Year |
1999 |
Publication |
Trends in Ecology & Evolution |
Abbreviated Journal |
Trends Ecol. Evol |
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Volume |
14 |
Issue |
8 |
Pages |
323-327 |
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Keywords |
Hairs; Feces; Feathers; Allelic dropout; Individual identification; Conservation genetics; Behavioural ecology; Pilot study; Microsatellites; Probability of identity |
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Abstract |
Noninvasive sampling allows genetic studies of free-ranging animals without the need to capture or even observe them, and thus allows questions to be addressed that cannot be answered using conventional methods. Initially, this sampling strategy promised to exploit fully the existing DNA-based technology for studies in ethology, conservation biology and population genetics. However, recent work now indicates the need for a more cautious approach, which includes quantifying the genotyping error rate. Despite this, many of the difficulties of noninvasive sampling will probably be overcome with improved methodology. |
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0169-5347 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6573 |
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Author |
Bertram, D.S. |
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Title |
Mosquitoes of British Honduras, with some comments on malaria, and on arbovirus antibodies in man and equines |
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Journal Article |
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Year |
1971 |
Publication |
Transactions of the Royal Society of Tropical Medicine and Hygiene |
Abbreviated Journal |
Trans R Soc Trop Med Hyg |
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Volume |
65 |
Issue |
6 |
Pages |
742-762 |
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Keywords |
Aedes; Animals; Anopheles; Antibodies/*analysis; Arbovirus Infections/*epidemiology/immunology/veterinary; Belize; Culex; *Culicidae/classification; Ecology; Encephalitis Virus, St. Louis/immunology; Encephalitis Virus, Venezuelan Equine/immunology; Horse Diseases/*epidemiology/immunology; Horses; Humans; Insect Vectors; Malaria/*epidemiology; Neutralization Tests; Seasons |
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English |
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0035-9203 |
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Notes |
PMID:4400502 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2732 |
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Author |
Polyanskaya, A.I.; Ovchinnikov, V.V. |
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Title |
Rate of growth and size of the brain of the horse mackerel |
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Journal Article |
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Year |
1974 |
Publication |
The Soviet Journal of Ecology |
Abbreviated Journal |
Sov J Ecol |
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Volume |
4 |
Issue |
3 |
Pages |
256-257 |
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Keywords |
Animals; Body Weight; *Brain; Ecology; Fishes/*growth & development; Genetics, Population; Organ Size |
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English |
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0096-7807 |
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PMID:4825911 |
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Call Number |
Equine Behaviour @ team @ |
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2708 |
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Author |
Boyce, P.N.; McLoughlin, P.D. |
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Title |
Ecological Interactions Involving Feral Horses and Predators: Review with Implications for Biodiversity Conservation |
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Journal Article |
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Year |
2021 |
Publication |
The Journal of Wildlife Management |
Abbreviated Journal |
Jour. Wild. Mgmt. |
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n/a |
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n/a |
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Keywords |
apparent competition; artificial selection; community ecology; conservation; feral horse (Equus ferus caballus); life history; predator-prey dynamics |
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Abstract |
ABSTRACT For many ecosystems, feral horses are increasingly becoming an important if not dominant component of ungulate biomass and hence influence on community dynamics. Yet we still know little of how horses contribute to key ecological interactions including predator-prey and indirect competitive relationships at a community level. Notably, feral species like horses can exhibit life-history traits that differ from that of native (mainly artiodactyl) herbivore competitors. Artificial selection for traits like increased, early, or extended reproduction that have yet to be reversed by natural selection, coupled with naturally selected differences in anatomy and behavior, in addition to unique management objectives for horses compared to other species, means that the dynamics of feral horse populations are not likely to align with what might be expected of other large herbivores. Unexpected population dynamics and inherent biological asymmetries between native ungulates and feral horses may therefore influence the former via direct competition for shared resources and through enemy-mediated interactions like apparent competition. In several localities feral horses now co-exist with multiple native prey species, some of which are in decline or are species at risk. Compounding risks to native species from direct or indirect competitive exclusion by horses is the unique nature and socio-political context of feral horse management, which tends towards allowing horse populations to be limited largely by natural, density-dependent factors. We summarize the inherent asymmetries between feral horse biology and that of other ungulate prey species with consequences for conservation, focusing on predator-prey and emerging indirect interactions in multi-prey systems, and highlight future directions to address key knowledge gaps in our understanding of how feral horses may now be contributing to the (re)structuring of food webs. Observations of patterns of rapid growth and decline, and associated skews in sex ratios of feral horse populations, indicate a heightened potential for indirect interactions among large ungulate prey species, where there is a prevalence of feral horses as preferred prey, particularly where native prey are declining. In places like western North America, we expect predator-prey interactions involving feral horses to become an increasingly important factor in the conservation of wildlife. This applies not only to economically or culturally important game species but also at-risk species, both predators (e.g., wolves [Canis lupus], grizzly bears [Ursus arctos]) and prey (e.g., woodland caribou [Rangifer tarandus caribou]), necessitating an ecological understanding of the role of horses in natural environments that goes beyond that of population control. ? 2021 The Wildlife Society. |
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John Wiley & Sons, Ltd |
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0022-541x |
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https://doi.org/10.1002/jwmg.21995 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
6642 |
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Author |
Wilhelm, W.E.; Anderson, J.H. |
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Title |
Vahlkampfia lobospinosa (Craig. 1912) Craig. 1913: rediscovery of a coprozoic ameba |
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Journal Article |
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Year |
1971 |
Publication |
The Journal of Parasitology |
Abbreviated Journal |
J Parasitol |
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Volume |
57 |
Issue |
6 |
Pages |
1378-1379 |
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Keywords |
Animals; Cattle; Ecology; Feces/microbiology; Horse Diseases/epidemiology; Horses; Protozoan Infections/epidemiology; *Protozoan Infections, Animal; Sarcodina/*classification/growth & development; Swine; Swine Diseases/epidemiology; Tennessee |
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0022-3395 |
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Notes |
PMID:5157177 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2724 |
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Author |
Walker, M.L.; Becklund, W.W. |
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Title |
Occurrence of a cattle eyeworm, Thelazia gulosa (Nematoda: Thelaziidae), in an imported giraffe in California and T. lacrymalis in a native horse in Maryland |
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Journal Article |
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Year |
1971 |
Publication |
The Journal of Parasitology |
Abbreviated Journal |
J Parasitol |
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Volume |
57 |
Issue |
6 |
Pages |
1362-1363 |
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Keywords |
Animals; *Animals, Zoo; Artiodactyla; California; Ecology; Eye Diseases/epidemiology/*veterinary; Female; Horse Diseases/*epidemiology; Horses; Male; Maryland; Nematode Infections/epidemiology/*veterinary; Spiruroidea/*classification |
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0022-3395 |
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PMID:5157171 |
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Call Number |
Equine Behaviour @ team @ |
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2725 |
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