Related Experiment Videos
Larval foraging behaviour and competition in Drosophila melanogaster
G Ruiz-Dubreuil1, B Burnet, K Connolly
1Instituto de Ecologia y Evolucion, Universidad Austral, Valdivia, Chile.
Heredity
|January 1, 1996
Summary
Fruit fly populations selected for high (HA) and low (LA) egg-laying behavior show distinct developmental rates and adult sizes due to differing larval feeding strategies. LA larvae are more adaptable competitors, especially in scarce food environments.
Area of Science:
- Evolutionary Biology
- Animal Behavior
- Developmental Biology
Background:
- Drosophila melanogaster populations exhibit variation in oviposition behavior.
- Bidirectional selection has created distinct high (HA) and low (LA) aggregated oviposition lines.
- Larval development duration and adult size are key fitness components influenced by feeding behavior.
Purpose of the Study:
- To investigate the developmental basis for differences in larval period duration and adult size between HA and LA Drosophila melanogaster populations.
- To analyze the feeding rate profiles across larval development stages in relation to selection for oviposition behavior.
- To understand the adaptive plasticity of foraging behavior in response to food availability.
Main Methods:
- Bidirectional selection experiments on Drosophila melanogaster for high and low aggregated oviposition.
- Measurement of larval feeding rates across different developmental phases.
- Analysis of larval development duration and adult fly size.
- Observation of foraging behavior responses to food presence and absence.
Main Results:
- HA larvae exhibit lower feeding rates during the flexible growth phase, leading to slower development.
- HA larvae show higher feeding rates in the postcritical development phase, resulting in larger adult size.
- Both HA and LA larvae demonstrate adaptive plasticity in foraging behavior based on food availability.
- LA larvae display more flexible foraging responses and superior competitive ability under limited food conditions.
Conclusions:
- Differences in larval feeding rate profiles directly influence developmental trajectories and adult size in selected Drosophila melanogaster lines.
- Adaptive plasticity in foraging behavior is crucial for survival and competition, particularly under resource limitation.
- Selection for oviposition behavior has indirectly shaped developmental plasticity and competitive success in Drosophila melanogaster.