I disabled social and population requirements to build a park on Isla Nublar with every skin of every dinosaur and noted something interesting:
6 Ceratosaurus shared an enclosure, but they were separated in 2 groups, each with their own Alpha. In another paddock, 6 Carnotaurus wandered in pairs, every couple had an Alpha, and none of the 5 T-rex were marked as such in their own pen.
So, in conclusion, it seems like they keep their social behaviours even if they don't need to: they will not murder each other but they are not friends either...
6 Ceratosaurus shared an enclosure, but they were separated in 2 groups, each with their own Alpha. In another paddock, 6 Carnotaurus wandered in pairs, every couple had an Alpha, and none of the 5 T-rex were marked as such in their own pen.
So, in conclusion, it seems like they keep their social behaviours even if they don't need to: they will not murder each other but they are not friends either...