As most predators do in hot climate. Its a pretty complex topic and its good that some research is done.
Wolfs hunt mostly during night time too, but dogs are not wolfs and despite research from like the 80s where dog behaviour was derived from wolf studies (that actually were mostly done with wolfs in zoos and national parks (Yellowstone was pretty big I think) we know now that these studies fail to explain real wolf behaviour). We just began to understand how wolfs interact with each other in packs in free nature and its fairly complex.
The entire 90s dog trainer used studies about wolfs to explain behaviour and train dogs, often the word dominance is used and that you have to be the "pack leader" for your dog to make him follow your "orders". Which is plain wrong on many levels but would go to far now.
Why do I talk about wolfs? Well, dogs that grew up with humans and get lost (in nature) are known to change behaviour very fast. (It mainly depends on the breed and ofc. character).
They begin to act more like wolves again to the point where they develop shyness in front of people and it has happened that they no longer let themselves be called by their original owner and also have not accepted food from them. It can be very difficult to get them used to humans again.
Obviously, this must be different for dogs that live in urban environments without their/a owner. What is probably not different is that pack structures develop but quite rarely in intra-species "serious" conflicts because they don't need to fight over resources. Most animals fight only if really necessary because even a won fight can lead to death because of injuries.