CHARACTER-SPECIFIC HOMEOSTASIS DOMINATES FLUCTUATING ASYMMETRIES IN THE MEDFLY (DIPTERA: TEPHRITIDAE)

Fluctuating asymmetry (FA) indicate random variation in size of bilaterally-produced traits, which occurs during development, and hence measures the degree of developmental instability. Whole-individual homeostasis has been assumed responsible for the negative correlation that has often been found b...

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Bibliographic Details
Published in:The Florida entomologist 2002-03, Vol.85 (1), p.73-82
Main Authors: Hasson, O, Rossler, Y
Format: Article
Language:English
Subjects:
asymmetry
biological development
Biological evolution
Ceratitis capitata
correlation
Developmental biology
developmental homeostasis
Disabilities
Fluctuating asymmetry
Frequency distribution
Homeostasis
Insect larvae
larvae
Phenotypic traits
population density
PROCEEDINGS OF AN FAO/IAEA RESEARCH COORDINATION PROJECT ON MEDFLY MATING
secondary sexual traits
setae (animal)
sexual dimorphism
Sexual selection
sexual selection medfly
size
Standard deviation
Thorax
traits
wings
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Summary:Fluctuating asymmetry (FA) indicate random variation in size of bilaterally-produced traits, which occurs during development, and hence measures the degree of developmental instability. Whole-individual homeostasis has been assumed responsible for the negative correlation that has often been found between FA of many sexually selected traits and their size. We show that, theoretically, character-specific homeostasis can provide an equally convincing explanation for this correlation. Furthermore, we tested these two hypotheses for (1) a sexually dimorphic character and (2) sexually monomorphic characters of the male Mediterranean fruit fly, Ceratitis capitata, by manipulating density during larval development. Our results clearly support character-specific homeostasis.
ISSN:0015-4040
1938-5102
DOI:10.1653/0015-4040(2002)085[0073:CSHDFA]2.0.CO;2