Origin of the domestic dog as the Tibetan people. A population genetic analysis then showed a significant convergence between humans and dogs in Tibet. Like the Tibetan people, Tibetan mastiffs appear to have derived these benefits partially from the EPAS1 gene, acquired through introgression. In 2015, a study found that when dogs and their owners interact, extended eye contact (mutual gaze) increases oxytocin levels in both the dog and its owner. As oxytocin is known for its role in maternal bonding, it is considered likely that this effect has supported the coevolution of human-dog bonding. One observer has stated, "The dog could have arisen only
Dog snapper Dog snapper The dog snapper ("Lutjanus jocu") is a species of snapper native to the Atlantic Ocean. It is a commercially important species, and is popular for display in public aquaria. It is also known as the dogtooth snapper, pargue, or snuggletooth snapper. Its color is typically brown with a bronze tinge, lighter on the sides. In adults, a pale triangle and a light-blue, interrupted line are found just below the eye. This species can reach a length of , though most do not exceed . The greatest known weight for this species is . Dog snapper are found from