Eur. J. Entomol. 93 (3): 451-459, 1996

Effects of interaction between temperature and CO2 on life-history traits of two Drosophila species (Diptera: Drosophilidae)

BOULETREAU-MERLE J., SILLANS D.
N/A

The effects of interaction between continuous exposure to different low CO2 concentrations (0% and 5%) and temperatures (14 and 25°C) on several life-history traits were studied in the two sibling species D. melanogaster and D. simulans. The various combinations of the two factors were applied during egg-to-adult development and during adult life.

Developmental duration was increased by CO2, particularly at low temperature (14°C), and viability reduced. At low temperature, body size was increased, although wing-length variation was reduced by CO2 in this condition. The fecundity of flies reared at low temperature was reduced due to a decrease in the number of ovarioles while carbon dioxide often improved egg production in both species. CO2, unlike temperature, did not appear to be a powerful selective factor, but modified the expression of certain traits, being, in some cases, beneficial to the flies.

Keywords: Drosophila melanogaster, D. simulans, temperature, carbon dioxide, developmental duration, viability, fecundity

Accepted: June 10, 1996; Published: September 30, 1996  Show citation

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BOULETREAU-MERLE, J., & SILLANS, D. (1996). Effects of interaction between temperature and CO2 on life-history traits of two Drosophila species (Diptera: Drosophilidae). EJE, 93(3), 451-459
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