The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum
Amblyomma variegatum is a three host hard tick that has demonstrated extensive range expansion over the last 150 years. This _Tropical Bont Tick_ vectors a number of economically important bacterial diseases of ruminants including the pathogen Ehrlichia ruminantium, causative agent of the highly virulent disease heartwater. Control of A. variegatum populations and it's associated diseases would be easier if population dynamic models were capable of predicting tick densities across heterogeneous environments and in response to a number of candidate control measures. Mechanistic population dynamic models describing the life cycle of the tick are known to be sensitive to both parameterisation and the choice of functional response linking demographic rates to environmental, and in particular climatic, variation. Prediction accuracy therefore depends fundamentally on the choice of functional response used within population dynamic models. We use field experiment data to compare the explicative power of competing hypotheses of functional response in a hybrid mechanistic-statistical modeling framework targeting the developmental and metamorphosis process undergone by engorged nymphs on passage to adult stage. Engorged nymphs were placed in cages at various altitudes in the mountains of Madagascar and the data used to parameterise a mechanistic model. The observed metamorphosis rate was modelled as a function of temperature data measured every 15 minutes at six sites using Tiny Tag climatic loggers. Various hypotheses linking metamorphosis rates to thermal accumulation are tested in a Bayesian framework. Results indicate that important non-linear relationships are identifiable in a mechanistically rich Bayesian approach using experimental data obtained in natura. We discuss the importance of the identified functional responses and remaining uncertainties in the context of predictive population dynamic models. A number of key outstanding research questions targeting key transitions in the A. variegatum life cycle are presented.. (Texte intégral)
Main Authors: | , , , , |
---|---|
Format: | conference_item biblioteca |
Language: | eng |
Published: |
European Society for Vector Ecology
|
Subjects: | L72 - Organismes nuisibles des animaux, L73 - Maladies des animaux, |
Online Access: | http://agritrop.cirad.fr/566185/ http://agritrop.cirad.fr/566185/1/document_566185.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-cirad-fr-566185 |
---|---|
record_format |
koha |
spelling |
dig-cirad-fr-5661852012-11-13T12:00:00Z http://agritrop.cirad.fr/566185/ http://agritrop.cirad.fr/566185/ The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum. Pleydell David, Guinat Claire, Lancelot Renaud, Rahajarison Patrick, Stachurski Frédéric. 2012. In : E-sove 2012 : from biology to integrated control in a changing world. Abstract book. European Society for Vector Ecology, CIRAD, EID, IRD. Montpellier : European Society for Vector Ecology, Résumé, 121. Conférence E-SOVE. 18, Montpellier, France, 8 Octobre 2012/11 Octobre 2012. Researchers The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum Pleydell, David Guinat, Claire Lancelot, Renaud Rahajarison, Patrick Stachurski, Frédéric eng 2012 European Society for Vector Ecology E-sove 2012 : from biology to integrated control in a changing world. Abstract book L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Amblyomma variegatum is a three host hard tick that has demonstrated extensive range expansion over the last 150 years. This _Tropical Bont Tick_ vectors a number of economically important bacterial diseases of ruminants including the pathogen Ehrlichia ruminantium, causative agent of the highly virulent disease heartwater. Control of A. variegatum populations and it's associated diseases would be easier if population dynamic models were capable of predicting tick densities across heterogeneous environments and in response to a number of candidate control measures. Mechanistic population dynamic models describing the life cycle of the tick are known to be sensitive to both parameterisation and the choice of functional response linking demographic rates to environmental, and in particular climatic, variation. Prediction accuracy therefore depends fundamentally on the choice of functional response used within population dynamic models. We use field experiment data to compare the explicative power of competing hypotheses of functional response in a hybrid mechanistic-statistical modeling framework targeting the developmental and metamorphosis process undergone by engorged nymphs on passage to adult stage. Engorged nymphs were placed in cages at various altitudes in the mountains of Madagascar and the data used to parameterise a mechanistic model. The observed metamorphosis rate was modelled as a function of temperature data measured every 15 minutes at six sites using Tiny Tag climatic loggers. Various hypotheses linking metamorphosis rates to thermal accumulation are tested in a Bayesian framework. Results indicate that important non-linear relationships are identifiable in a mechanistically rich Bayesian approach using experimental data obtained in natura. We discuss the importance of the identified functional responses and remaining uncertainties in the context of predictive population dynamic models. A number of key outstanding research questions targeting key transitions in the A. variegatum life cycle are presented.. (Texte intégral) conference_item info:eu-repo/semantics/conferenceObject Conference info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/566185/1/document_566185.pdf application/pdf Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html http://agritrop.cirad.fr/566122/ |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux L72 - Organismes nuisibles des animaux L73 - Maladies des animaux |
spellingShingle |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux L72 - Organismes nuisibles des animaux L73 - Maladies des animaux Pleydell, David Guinat, Claire Lancelot, Renaud Rahajarison, Patrick Stachurski, Frédéric The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
description |
Amblyomma variegatum is a three host hard tick that has demonstrated extensive range expansion over the last 150 years. This _Tropical Bont Tick_ vectors a number of economically important bacterial diseases of ruminants including the pathogen Ehrlichia ruminantium, causative agent of the highly virulent disease heartwater. Control of A. variegatum populations and it's associated diseases would be easier if population dynamic models were capable of predicting tick densities across heterogeneous environments and in response to a number of candidate control measures. Mechanistic population dynamic models describing the life cycle of the tick are known to be sensitive to both parameterisation and the choice of functional response linking demographic rates to environmental, and in particular climatic, variation. Prediction accuracy therefore depends fundamentally on the choice of functional response used within population dynamic models. We use field experiment data to compare the explicative power of competing hypotheses of functional response in a hybrid mechanistic-statistical modeling framework targeting the developmental and metamorphosis process undergone by engorged nymphs on passage to adult stage. Engorged nymphs were placed in cages at various altitudes in the mountains of Madagascar and the data used to parameterise a mechanistic model. The observed metamorphosis rate was modelled as a function of temperature data measured every 15 minutes at six sites using Tiny Tag climatic loggers. Various hypotheses linking metamorphosis rates to thermal accumulation are tested in a Bayesian framework. Results indicate that important non-linear relationships are identifiable in a mechanistically rich Bayesian approach using experimental data obtained in natura. We discuss the importance of the identified functional responses and remaining uncertainties in the context of predictive population dynamic models. A number of key outstanding research questions targeting key transitions in the A. variegatum life cycle are presented.. (Texte intégral) |
format |
conference_item |
topic_facet |
L72 - Organismes nuisibles des animaux L73 - Maladies des animaux |
author |
Pleydell, David Guinat, Claire Lancelot, Renaud Rahajarison, Patrick Stachurski, Frédéric |
author_facet |
Pleydell, David Guinat, Claire Lancelot, Renaud Rahajarison, Patrick Stachurski, Frédéric |
author_sort |
Pleydell, David |
title |
The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
title_short |
The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
title_full |
The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
title_fullStr |
The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
title_full_unstemmed |
The functional response of metamorphosis rates to climatic variation: A case study with Amblyomma variegatum |
title_sort |
functional response of metamorphosis rates to climatic variation: a case study with amblyomma variegatum |
publisher |
European Society for Vector Ecology |
url |
http://agritrop.cirad.fr/566185/ http://agritrop.cirad.fr/566185/1/document_566185.pdf |
work_keys_str_mv |
AT pleydelldavid thefunctionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT guinatclaire thefunctionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT lancelotrenaud thefunctionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT rahajarisonpatrick thefunctionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT stachurskifrederic thefunctionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT pleydelldavid functionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT guinatclaire functionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT lancelotrenaud functionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT rahajarisonpatrick functionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum AT stachurskifrederic functionalresponseofmetamorphosisratestoclimaticvariationacasestudywithamblyommavariegatum |
_version_ |
1758023458368782336 |