How Reproductive Ecology Contributes to the Spread of a Globally Invasive Fish
Author Information
Author(s): Amy E. Deacon, Indar W. Ramnarine, Anne E. Magurran
Primary Institution: Scottish Oceans Institute, School of Biology, University of St Andrews
Hypothesis
Can single pregnant female guppies routinely establish viable populations in new environments?
Conclusion
The study demonstrates that single pregnant guppies can successfully establish thriving populations, highlighting the risks of introducing this invasive species.
Supporting Evidence
- Single pregnant guppies can establish viable populations in new environments.
- 86% of guppy populations persisted for two years in the study.
- Establishment success was independent of the predation risk of the founding population.
Takeaway
Even one pregnant guppy can start a whole new group of guppies in a new place, which can be a problem for local fish.
Methodology
The study used a replicated mesocosm setup to test the establishment success of guppies from different predation environments.
Potential Biases
Potential bias in the selection of guppy populations and environmental conditions in the mesocosms.
Limitations
The study was conducted in controlled environments, which may not fully replicate natural conditions.
Participant Demographics
Guppies from high and low predation habitats in Trinidad.
Statistical Information
P-Value
p=0.031
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website