A genetically based ecological trade-off contributes to setting a geographic range limit

Alexander Mauro, Julian Torres-Dowdall, Craig Marshall & Cameron Ghalambor
Understanding the ecological factors that shape geographic range limits and the evolutionary constraints that prevent populations from adaptively evolving beyond these limits is an unresolved question. Here, we investigated why the euryhaline fish, Poecila reticulata, is confined to freshwater within its native range, despite being tolerant of brackish water. We hypothesized that competitive interactions with a close relative, Poecilia picta, in brackish water prevents P. reticulata from colonizing brackish water. Using a combination of field...
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3 downloads reported since publication in 2021.

These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?