Document Detail

The proximal costs of case construction in caddisflies: antioxidant and life history responses.
MedLine Citation:
PMID:  22735351     Owner:  NLM     Status:  Publisher    
Animal construction allows organisms to cope with environmental variations but the physiological costs of such behaviour are still poorly understood. The aim of the present study was to measure the physiological cost of construction behaviour through the oxidative balance that is known to affect the ability of organs to function, stimulate senescence processes and ultimately impact the fitness of the organism. We used larvae of caddisfly, Limnephilus rhombicus, by experimentally modifying the effort associated with case-building. Larvae that were forced to build a new case showed a significant increase in both total antioxidant capacity and the specific activity of superoxide dismutase 48 hours and 72 hours, respectively, after the initiation of the reconstruction. These results strongly suggest that the larval construction behaviour triggered the production of reactive oxygen species but their effects were reversed 7 days after the reconstruction. In the animals that were forced to build a new case, oxidative stress appeared to be mitigated by a network of antioxidant defences because no oxidative damage was observed in proteins compared to the control larvae. At the adult stage, while the longevity was not sex-dependant and not affected by the treatment, the body weight and the body size of adult males from the reconstruction treatment were significantly lower than the control ones. Such unexpected sex effect together with data on oxidative stress highlight the difficulty to determine the physiological cost associated with energy demanding behaviours implying a consideration of both their energetic and non-energetic components.
Nathalie Mondy; Benjamin Rey; Yann Voituron
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-26
Journal Detail:
Title:  The Journal of experimental biology     Volume:  -     ISSN:  1477-9145     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
University of Lyon 1.
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