Map of the studied brook indicating different sites in different colours, where crayfish and food sources were sampled. The blue stretch of the brook indicates allopatric noble crayfish site, purple indicates noble and signal crayfish sympatric site, and the red signals crayfish allopatric site. Black arrows indicate weirs, green arrows indicate the flow direction.

 
 
  Part of: Ercoli F, Ruokonen TJ, Bláha M, Kouba A, Buřič M, Veselý L (2025) Invasive signal crayfish and native noble crayfish show trophic niche shrinkage in sympatry. NeoBiota 98: 145-162. https://doi.org/10.3897/neobiota.98.127329