Document Detail

Effects of early resource limitation and compensatory growth on lifetime fitness in the ladybird beetle (Harmonia axyridis).
MedLine Citation:
PMID:  17584225     Owner:  NLM     Status:  MEDLINE    
Acceleration of growth following a period of diet restriction may result in either complete or partial catch-up in size. The existence of such compensatory growth indicates that organisms commonly grow at rates below their physiological maxima and this implies a cost for accelerated growth. We examined patterns of accelerated growth in response to temporary resource limitation, and assayed both short and long-term costs of this growth in the ladybird beetle Harmonia axyridis. Subsequent to the period of food restriction, accelerated growth resulted in complete compensation for body sizes, although we observed greater larval mortality during the period of compensation. There were no effects on female fecundity or survivorship within 3 months of maturation. Females did not discriminate against males that had undergone compensatory growth, nor did we observe effects on male mating behaviour. However, individuals that underwent compensatory growth died significantly sooner when deprived of food late in adult life, suggesting that longer-term costs of compensatory growth may be quite mild and detectable only under stressful conditions.
C Dmitriew; L Rowe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of evolutionary biology     Volume:  20     ISSN:  1010-061X     ISO Abbreviation:  J. Evol. Biol.     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-22     Completed Date:  2007-08-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809954     Medline TA:  J Evol Biol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  1298-310     Citation Subset:  IM    
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada.
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MeSH Terms
Beetles / genetics,  growth & development*,  physiology*
Food Deprivation
Sexual Behavior, Animal

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