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Does moving up a food chain increase aggregation in parasites?
1School of Biological Sciences, University of Queensland, Brisbane, Queensland, Australia.
Journal of the Royal Society, Interface
|May 13, 2016
Summary
Parasite aggregation in fish predators increases when parasites are acquired through prey. This occurs because parasites accumulate in prey, and predator feeding behavior can further amplify this aggregation.
Area of Science:
- Ecological parasitology
- Ichthyology
- Parasite ecology
Background:
- General laws in ecological parasitology are limited.
- Understanding parasite aggregation is crucial for ecosystem health.
Purpose of the Study:
- To investigate the relationship between prey acquisition and parasite aggregation in fish.
- To determine if trophic transmission increases parasite aggregation.
Main Methods:
- Analysis of published fish parasite data from over 200 authors.
- Taxonomic grouping of parasite species for robust data points.
- Development and application of a stochastic model.
Main Results:
- Parasites that remain at a single trophic level show less aggregation than those transmitted through prey.
- Parasite accumulation in prey is a primary driver of high parasite aggregation in predators.
- Changes in predator feeding behavior with age can exacerbate parasite aggregation.
Conclusions:
- Trophic transmission significantly increases parasite aggregation in fish.
- Parasite aggregation dynamics are influenced by both prey-to-predator transmission and predator behavior.
- Findings provide insights into ecological parasitology and host-parasite interactions.
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