Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica
Due to climatic changes and human activities, many ecosystems are acquiring the capacity to shelter major pathogens. Because environmental parameters impact insects bionomics, vector and vector-borne disease distributions have significantly changed during the past years. Our aim is to study the conditions required for the establishment of a new vector in a new ecosystem, taking as example Culicoides imicola, one of the main vectors of bluetongue, in Corsica. The favorable environment for C. imicola is described using remote sensing and Geographical Information Systems (GIS). Parameters likely to influence vector distribution were extracted from a SPOT image (10 meters pixel) and from a digital elevation model (DEM). The normalized difference vegetation index was calculated and a supervised classification was carried out. Slope, altitude, sunshine, and orientation of study sites were extracted from the DEM. Two types of epidemiological data were used to model the distribution of favorable sites for C. imicola. Data on sheep disease cases (farm descriptors and health status) highlighted the impact of environmental variables such as latitude and some types of vegetation. Another model was established using entomological data collected during one-night catches in a hundred sites in June 2005. The neighborhood of farms and trapping sites was compared to build logistic models on bluetongue and vector occurrence. Data, methods, results, applications and limits of the two approaches are discussed here. (Texte intégral)
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dig-cirad-fr-5414752024-01-28T15:24:15Z http://agritrop.cirad.fr/541475/ http://agritrop.cirad.fr/541475/ Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica. Guis Hélène, Tran Annelise, De La Rocque Stéphane, Baldet Thierry, Delecolle Jean Claude, Mathieu B., Viel Jean-François, Roger François, Mauny Frédéric. 2006. In : Proceedings of the 11th Symposium of the International Society of Veterinary Epidemiology and Economics, Cairns, Australia. ISVEE. Cairns : ISVEE, Résumé (ISVEE Proceedings, 1177-360X, 11) International Symposium on Veterinary Epidemiology and Economics. 11, Cairns, Australie, 6 Août 2006/11 Août 2006.http://www.sciquest.org.nz/node/64101 <http://www.sciquest.org.nz/node/64101> Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica Guis, Hélène Tran, Annelise De La Rocque, Stéphane Baldet, Thierry Delecolle, Jean Claude Mathieu, B. Viel, Jean-François Roger, François Mauny, Frédéric eng 2006 ISVEE Proceedings of the 11th Symposium of the International Society of Veterinary Epidemiology and Economics, Cairns, Australia L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 Corse France http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 Due to climatic changes and human activities, many ecosystems are acquiring the capacity to shelter major pathogens. Because environmental parameters impact insects bionomics, vector and vector-borne disease distributions have significantly changed during the past years. Our aim is to study the conditions required for the establishment of a new vector in a new ecosystem, taking as example Culicoides imicola, one of the main vectors of bluetongue, in Corsica. The favorable environment for C. imicola is described using remote sensing and Geographical Information Systems (GIS). Parameters likely to influence vector distribution were extracted from a SPOT image (10 meters pixel) and from a digital elevation model (DEM). The normalized difference vegetation index was calculated and a supervised classification was carried out. Slope, altitude, sunshine, and orientation of study sites were extracted from the DEM. Two types of epidemiological data were used to model the distribution of favorable sites for C. imicola. Data on sheep disease cases (farm descriptors and health status) highlighted the impact of environmental variables such as latitude and some types of vegetation. Another model was established using entomological data collected during one-night catches in a hundred sites in June 2005. The neighborhood of farms and trapping sites was compared to build logistic models on bluetongue and vector occurrence. Data, methods, results, applications and limits of the two approaches are discussed here. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/541475/1/document_541475.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://www.sciquest.org.nz/node/64101 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=197945 info:eu-repo/semantics/altIdentifier/purl/http://www.sciquest.org.nz/node/64101 |
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L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 |
spellingShingle |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 Guis, Hélène Tran, Annelise De La Rocque, Stéphane Baldet, Thierry Delecolle, Jean Claude Mathieu, B. Viel, Jean-François Roger, François Mauny, Frédéric Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
description |
Due to climatic changes and human activities, many ecosystems are acquiring the capacity to shelter major pathogens. Because environmental parameters impact insects bionomics, vector and vector-borne disease distributions have significantly changed during the past years. Our aim is to study the conditions required for the establishment of a new vector in a new ecosystem, taking as example Culicoides imicola, one of the main vectors of bluetongue, in Corsica. The favorable environment for C. imicola is described using remote sensing and Geographical Information Systems (GIS). Parameters likely to influence vector distribution were extracted from a SPOT image (10 meters pixel) and from a digital elevation model (DEM). The normalized difference vegetation index was calculated and a supervised classification was carried out. Slope, altitude, sunshine, and orientation of study sites were extracted from the DEM. Two types of epidemiological data were used to model the distribution of favorable sites for C. imicola. Data on sheep disease cases (farm descriptors and health status) highlighted the impact of environmental variables such as latitude and some types of vegetation. Another model was established using entomological data collected during one-night catches in a hundred sites in June 2005. The neighborhood of farms and trapping sites was compared to build logistic models on bluetongue and vector occurrence. Data, methods, results, applications and limits of the two approaches are discussed here. (Texte intégral) |
format |
conference_item |
topic_facet |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux U30 - Méthodes de recherche Culicoides télédétection vecteur de maladie surveillance épidémiologique fièvre catarrhale ovine imagerie modèle distribution spatiale végétation technique de prévision épidémiologie http://aims.fao.org/aos/agrovoc/c_10196 http://aims.fao.org/aos/agrovoc/c_6498 http://aims.fao.org/aos/agrovoc/c_8164 http://aims.fao.org/aos/agrovoc/c_16411 http://aims.fao.org/aos/agrovoc/c_976 http://aims.fao.org/aos/agrovoc/c_36760 http://aims.fao.org/aos/agrovoc/c_4881 http://aims.fao.org/aos/agrovoc/c_36230 http://aims.fao.org/aos/agrovoc/c_8176 http://aims.fao.org/aos/agrovoc/c_3041 http://aims.fao.org/aos/agrovoc/c_2615 http://aims.fao.org/aos/agrovoc/c_1907 http://aims.fao.org/aos/agrovoc/c_3081 |
author |
Guis, Hélène Tran, Annelise De La Rocque, Stéphane Baldet, Thierry Delecolle, Jean Claude Mathieu, B. Viel, Jean-François Roger, François Mauny, Frédéric |
author_facet |
Guis, Hélène Tran, Annelise De La Rocque, Stéphane Baldet, Thierry Delecolle, Jean Claude Mathieu, B. Viel, Jean-François Roger, François Mauny, Frédéric |
author_sort |
Guis, Hélène |
title |
Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
title_short |
Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
title_full |
Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
title_fullStr |
Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
title_full_unstemmed |
Use of satellite imagery to predict the distribution of bluetongue vector C. imicola in Corsica |
title_sort |
use of satellite imagery to predict the distribution of bluetongue vector c. imicola in corsica |
publisher |
ISVEE |
url |
http://agritrop.cirad.fr/541475/ http://agritrop.cirad.fr/541475/1/document_541475.pdf |
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