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Titre :
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Modelling the effect of temperature on the longevity of the grain aphid, Sitobion avenae (F) (Hom, Aphididae)
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Auteurs :
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T. Selhorst ;
B. Kleinhenz ;
C. Sengonca
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Type de document :
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article/chapitre/communication
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Année de publication :
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1995
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Format :
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197-203
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Langues:
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= Anglais
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Mots-clés:
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resampling methods
;
population dynamics
;
Sitobion avenae
;
temperature
;
Modelisation
;
Temperature
;
Longevite
;
Modele de developpement
;
Aphididae
;
Cereale
;
Gramineae
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Résumé :
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Adult S. avenae were reared under constant temperatures of 12, 16, 20, 22.5 and 28.5 degrees C and under periodically fluctuating temperatures of 10-15 and 15-20 degrees C for 14 h light and 10 h dark per day respectively. The aphid's longevities were distributed unimodally under constant conditions and bimodally in the case of fluctuating temperature regimes. An accelerated life model was set up to model the observed temperature dependency. The results obtained from the experiments with constant temperatures were used to estimate the parameters of this model. The results obtained from the experiments with the fluctuating temperatures were used to validate the accelerated life model. Although the accelerated life model used in this study was originally developed to simulate the effect of temperature on unimodally distributed life times, it was also appropriate to simulate the effect of temperature on bimodally distributed life times, according to tests involving estimates of the biological parameter intrinsic growth rate r. Using resampling methods the mean value as well as the 95% confidence limits of this parameter can be calculated from either the model predictions or the experimental data.
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Source :
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Ecological Modelling - 0304-3800, vol. 80, n° 2-3
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