Statistical analysis of honeybee survival after chronic exposure to insecticides

Studies concerning long‐term survival of honeybees raise the problem of the statistical analysis of mortality data. In the present study, we used a modeling approach of survival data of caged bees under chronic exposure to two pesticides (imidacloprid and deltamethrin). Our model, based on a Cox pro...

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Bibliographic Details
Published in:Environmental toxicology and chemistry 2003-12, Vol.22 (12), p.3088-3094
Main Authors: Moncharmont, François-Xavier Dechaume, Decourtye, Axel, Hennequet-Hantier, Christelle, Pons, Odile, Pham-Delègue, Minh-Hà
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Animals
Apidae
Apis mellifera
Applied ecology
Bees
Biological and medical sciences
Chronic toxicity
Computer Science
Cox model
Deltamethrin
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on protozoa and invertebrates
Fundamental and applied biological sciences. Psychology
Honeybee survival
Imidacloprid
Imidazoles - toxicity
Insecticides - toxicity
Life Sciences
Models, Statistical
Neonicotinoids
Nitriles
Nitro Compounds
Population Dynamics
Pyrethrins - toxicity
Reproducibility of Results
Social Behavior
Survival Analysis
Techniques
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Summary:Studies concerning long‐term survival of honeybees raise the problem of the statistical analysis of mortality data. In the present study, we used a modeling approach of survival data of caged bees under chronic exposure to two pesticides (imidacloprid and deltamethrin). Our model, based on a Cox proportional hazard model, is not restricted to a specific hazard functional form, such as in parametric approaches, but takes into account multiple covariates. We consider not only the pesticide treatment but also a nuisance variable (variability between replicates). Moreover, considering the occurrence of social interactions, the model integrates the fact that bees do not die independently of each other. We demonstrate the chronic toxicity induced by imidacloprid and deltamethrin. Our results also underline the role of the replicate effect, the density‐dependent effect, and their interactions with the treatment effect. None of these parameters can be neglected in the assessment of chronic toxicity of pesticides to the honeybee.
ISSN:0730-7268
1552-8618
DOI:10.1897/02-578