Territoriality from a top view of a tank. Black straight lines represent edges of the tanks (size 20cm X 40cm). Colored lines follow the swimming paths of four individuals over a 1 min period. A Thin lines follow four Pachón cavefish. B Thick lines follow four eyeless Caballo Moro cavefish. Yellow star signals an attack. Specimens used for both cavefish populations are eyeless. Notice that while all Pachón fish swim throughout the entirety of the tank and the paths of individual fish converge over the paths of other individuals, those of Caballo Moro are mostly restricted to a corner, and each individual holds a territory seldom crossed by another individual. However, when they do cross, it can result in an attack.

  Part of: Espinasa L, Collins E, Ornelas García CP, Rétaux S, Rohner N, Rutkowski J (2022) Divergent evolutionary pathways for aggression and territoriality in Astyanax cavefish. Subterranean Biology 43: 169-183. https://doi.org/10.3897/subtbiol.73.79318