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Application of Capture-Recapture Models for Estimating Coffee Stemborer (Coleoptera: Cerambycidae) Abundance

  • Wei Jianing 
  • Kuang RongPing 
Research Article

Abstract

The population of coffee stemborers (Coleoptera: Cerambycidae) was estimated at six sites in south-west China using two capture-recapture models. Two sampling methods (simple and systematic random sampling), each at three sampling intensities (10, 20 and 30%) were employed for two-time capture attempts from which the capture-recapture estimates were calculated. Estimates from the models were compared with that of census data from the fields. When sampling intensity was 20%, satisfactory levels of accuracy were obtained using the two models. The level of accuracy of the estimates increased as damage rate and mean density of the insect increased. Accuracy was also increased with increasing the sampling intensity, when damage rate and density of stemborers in the plots were low.

Key Words

capture-recapture model coffee stemborers population sampling China 

Résumé

La population de foreurs de tige du caféier (Coleoptera: Cerambycidae) a été évaluée sur six sites au sud de la Chine, par utilisation des modèles de capture et recapture. Deux méthodes d’échantillonnage (une méthode simple et une autre de randomisation systématique), chacune d’elles comportant trois niveaux d’intensité d’échantillonnage (10, 20 et 30 %), ont été employées lors de deux essais de capture à partir desquels on a calculé les taux de captures et recaptures. Les résultats d’estimation obtenus à partir des deux modèles étaient comparés à ceux enregistrés dans les champs. A l’intensité d’échantillonnage de 20%, on obtenait des niveaux satisfaisants de précision pour les deux modèles. Les niveaux de plus de précision allaient de pair avec l’augmentation du taux de dégâts et de la densité moyenne des insectes. De même, les niveaux de précision croissaient en fonction de l’augmentation de l’intensité d’échantillonnage au moment où les taux de dégâts et la densité des foreurs étaient encore bas dans les parcelles.

Mots Clés

modèle de capture et recapture foreurs de tige du caféier échantillonnage de populations Chine 

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Copyright information

© ICIPE 2000

Authors and Affiliations

  • Wei Jianing 
    • 1
  • Kuang RongPing 
    • 1
  1. 1.Department of Entomology, Kunming Institute of ZoologyThe Chinese Academy of SciencesKunmingThe People’s Republic of China

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