Related Experiment Video
Updated: Jul 4, 2025
05:20
Long-Term Live Imaging of Drosophila Pupal Leg Development After Puparium Removal
Published on: January 17, 2025
647
Predator-induced shape plasticity in Daphnia pulex
Sam Paplauskas1, Oscar Morton2, Mollie Hunt2
1Biological & Environmental Sciences University of Stirling Stirling UK.
Ecology and Evolution
|February 7, 2024
Summary
Predation risk induces phenotypic plasticity in Daphnia pulex, causing changes beyond neckteeth to include head and body shape. This demonstrates a complex, integrated whole-organism response to environmental threats.
Area of Science:
- Evolutionary Biology
- Ecology
- Developmental Biology
Background:
- Phenotypic plasticity enables organisms to adapt to environmental changes.
- Predation risk is a significant environmental variable driving evolutionary adaptations.
- Daphnia pulex exhibit neckteeth as a defense against Chaoborus midge larvae predation.
Purpose of the Study:
- To investigate the whole-organism shape response to varying predation risk in Daphnia pulex.
- To analyze how multiple body parts of Daphnia pulex change under different predation pressures.
- To understand the integration of morphological changes in response to predation.
Main Methods:
- Analysis of Daphnia pulex morphology across a gradient of Chaoborus flavicans predation risk.
- Quantitative assessment of shape changes in neckteeth, head, and body.
- Examination of modularity and integration of body plan changes.
Main Results:
- Daphnia pulex exhibit significant changes in overall shape, not limited to neckteeth.
- Morphological defenses include alterations in head and body size and shape.
- Detected changes in specific body modules and their integration, indicating a complex adaptive response.
Conclusions:
- Predation risk drives a complex, multi-faceted phenotypic plasticity in Daphnia pulex.
- Morphological changes extend beyond direct defenses to affect the entire organism's shape.
- This study provides insights into how environmental pressures shape organismal form and integration.
Related Concept Videos
02:39Predator-Prey Interactions
16.2K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.2K
01:06Fixed Action Patterns
16.0K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
16.0K