Gene Flow in Caffrogobius caffer Despite Ocean Barriers
Author Information
Author(s): Neethling Marlene, Matthee Conrad A, Bowie Rauri CK, von der Heyden Sophie
Primary Institution: Stellenbosch University
Hypothesis
How do oceanographic features influence gene flow in Caffrogobius caffer populations?
Conclusion
Caffrogobius caffer maintains gene flow across its distribution despite significant oceanographic barriers.
Supporting Evidence
- Caffrogobius caffer showed no significant population genetic structuring along 1300 km of coastline.
- Coalescent analyses revealed that gene flow is strongly asymmetrical and predominantly affected by the Agulhas Current.
- The mismatch distribution suggests that C. caffer underwent a population expansion at least 14,500 years ago.
Takeaway
This study found that a type of fish can still mix and share genes even when there are big ocean currents that usually keep them apart.
Methodology
The study involved collecting fish samples from ten localities and analyzing the mitochondrial DNA control region to assess genetic structure.
Limitations
The study could not obtain samples from the central and northern KwaZulu-Natal coastline.
Participant Demographics
The study focused on Caffrogobius caffer, a fish species endemic to South Africa.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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