Complex sentence: The females can usually move freely between territories and males are unable to coerce them, but some species, like the northern fur seal, South American sea lion and Australian sea lion can successfully contain females in their territories and prevent them from leaving.
Split into simpler sentences: The females can usually move freely between territories and males are unable to coerce them. Although some species like the northern fur seal, South American sea lion and Australian sea lion can successfully contain females in their territories and prevent them from leaving.