Egg size in Drosophila: Standard Unit of investment of variable response to environment? The effect of temperature

摘要: Abstract The volume and number of eggs laid by three Drosophila species ( D. simulans , subobscura phalerata ) were measured over several seasons. Eggs smaller more numerous at higher temperatures. total amount resources invested in increased with temperature, suggesting that there is no real physiological trade-off between egg number. There was consistent within-sample correlation the two traits. effect temperature on confirmed comparing samples raised under identical regimes up to emergence imagos exposed different temperatures thereafter: volume, indicating these affected environmental conditions than previously thought.