Invasive Northern Pike Dispersal in Alaska
Author Information
Author(s): Wooller Matthew J., Bradley Parker, Spaleta Karen J., Massengill Robert L., Dunker Kristine, Westley Peter A.H.
Primary Institution: University of Alaska Fairbanks
Hypothesis
Can Northern Pike use estuarine pathways for dispersal in North America?
Conclusion
The study provides early evidence that invasive Northern Pike can disperse through estuarine habitats in Alaska, raising conservation concerns.
Supporting Evidence
- The study documents the first known use of estuarine habitats by Northern Pike in North America.
- Isotope analysis revealed that some Northern Pike spent time in brackish environments before being captured.
- Findings indicate a potential new pathway for the spread of invasive Northern Pike in Alaska.
Takeaway
This study shows that Northern Pike, a fish that usually lives in freshwater, can also move through salty water, which is surprising and could be a problem for local fish.
Methodology
The researchers analyzed strontium isotope composition in otoliths from Northern Pike captured in various locations to trace their migratory pathways.
Limitations
The sample size is small, and further research is needed to confirm findings across more individuals and locations.
Digital Object Identifier (DOI)
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