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Published on: July 20, 2017
Spawning, copulation and inbreeding coefficients in marine invertebrates
1Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1.
Biology Letters
|December 7, 2006
Summary
Marine invertebrates with free-spawned planktonic sperm show higher inbreeding (FIS) than those with direct sperm transfer. This unexpected life history correlation impacts population genetic variation.
Area of Science:
- Population genetics
- Marine biology
- Evolutionary biology
Background:
- Population genetic variation is often linked to life history traits like dispersal and breeding systems.
- Marine invertebrates exhibit diverse life histories influencing gene flow and population differentiation (FST).
Purpose of the Study:
- To investigate the relationship between marine invertebrate life histories and deviations from Hardy-Weinberg equilibrium (inbreeding coefficient, FIS).
Main Methods:
- Analysis of published studies on marine invertebrates.
- Correlation analysis between reproductive strategies and FIS values.
Main Results:
- A significant positive correlation was found between free-spawned planktonic sperm and higher FIS values.
- This pattern held across different analytical methods, indicating robustness.
Conclusions:
- Reproductive mode, specifically sperm dispersal strategy, is unexpectedly linked to inbreeding levels in marine invertebrates.
- Further research is needed to elucidate the mechanisms driving this observed correlation.
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