Does a cat have a taste? Curiosity is strong, see what the owner wants to smell the cat, can eat the difference between food and food? What kind of sweet and sour cats can feel?
In previous studies, scientists have found that both domestic cats and wild cats are unable to taste sugars because they lack a gene that controls sweet receptors. The cat is a complete carnivore, and a recent paper published in the proceedings of the American Academy of Sciences by researchers from the Monello research center and the University of Zurich showed that seven of the 12 related mammals had lost their perception of sweetness, and all of them were carnivores. This discovery may indicate that there is a degradation of sweetness in the evolution of recipes.
The researchers made the discovery after analyzing the relationship between sweet sensor genes and their diets in 12 mammalian species. Behavioral biologist Gary Beauchamp, Ph.D., said that perception of sweetness was once thought to be widespread in the animal kingdom, so the results surprised everyone. Among the subjects, sea lions, seals, Asian otters, spotted hyenas, masked beavers and banded lingsang were all completely carnivorous animals, but they all lost the sense of sweetness, while hyenas, Canadian otters, cobras, raccoons, red wolves and other omnivorous animals still had sweet perception.
Further studies have shown that the seven kinds of animals have different sweet perception defects. In the evolutionary history, the diet related taste loss occurred in a repeated and independent form, indicating that the structure and function of the animal perception system are of great importance to the diet niche. At the same time, in order to further understand the relationship between feeding behavior and taste function, the researchers tested the sweet taste and aroma perception genes in two kinds of mammals (sea lion and bottlenose dolphin) who “returned” to the sea. The reason why they chose these two animals was that they both swallowed the food completely, so the sense of taste would not play a significant role in their food selection. As expected, they all lost their sense of taste, and the sweet and aroma sensor genes did not work at all, and bottlenose dolphins could not even taste bitterness. Beauchamp said that different animals have different taste regions due to different food sources, and that all animals (including humans) like to eat based on the nature of their taste receptors.
The study raises the question of recipe choice. In other recent studies, many organs, including intestine, pancreas, nose and lung, also contain taste receptors, which may have different functions in different locations. Dr. Peihua Jiang said that these extra oral taste sensors are not necessary for the survival of specific species, but they may compensate for the loss of sweetness, fragrance and bitterness in animals.