CATDOLL : CATDOLL: Why do frogs change color?

1. Why do frogs change color?

Frogs adapt to their environment and can change their body color according to the environment. Use 4 large 1000mL wide-mouth bottles, specimen tanks or other transparent containers, and add 25mm deep water to the containers. Do not wrap the outside of the first bottle with any paper; wrap the outside of the second bottle with yellow paper; wrap the outside of the third bottle with green paper; and wrap the outside of the fourth bottle with black paper. Put frogs of the same size and color in each bottle and seal the bottle mouth with black cloth. Put them in a bright place without direct sunlight. After 3 days, remove all the paper wrapped outside the bottles and compare the differences in the colors of the frogs in the four bottles.

The body color of a frog is a combination of green and black as the basic tones. The body color of a frog is formed by three layers of pigment cells arranged in the skin. The bottom layer is melanocytes, which have finger-like protrusions that can extend between the two layers of pigment cells above; the middle layer is a layer of iridophores, which reflect and scatter light and can produce blue-green; the layer closest to the surface is xanthophores, which can filter out blue and make the skin green. When melanin particles diffuse and move to the finger-like protrusions of melanocytes, the skin appears dark; when melanin particles concentrate around the nucleus, the skin color becomes lighter. These changes are caused by light passing through the frog's eyes, affecting the secretion of hormones by the adrenal glands and pituitary glands, and hormones controlling pigment cells. Therefore, the frogs in each culture tank wrapped in different colored paper are stimulated by different colors of light, and the secretion of hormones is naturally different. The changes in pigment cells are different, which will cause different changes in the skin color of the frogs in several bottles.

The above experiments should be carried out during the frog's nutritional period, which is usually from April to September.

Protective color

2. How do frogs change color?

Most of the frogs that change color do so to warn of danger. So when they are in danger, they release toxins from their bodies through their pores to their epidermis, forming bright colors to warn intruders. Of course, they are highly toxic, and if they are eaten, predators will also suffer.

3. The tadpole stopped eating after growing legs. It wouldn’t eat egg yolks and the water level was lowered. What should I do? Urgent!!!

I fed the frogs food. I feel like I have turned into a frog.

After the tadpoles grow legs, they need to eat live food. They have already turned into frogs. Frogs need to be fed live food because they cannot see or move food. For example, the frogs in frog farms are fed with feed, which needs to be trained. The feed is placed on something like a trampoline, and the feed will move as soon as the frog goes up. Even if the feed is placed on the ground and remains motionless, the frog cannot see it.

4. What should I do if the water turns red when feeding pellet feed?

What brand of feed did you use? How many grams does it contain? Generally, better feed can last longer in water. In addition, if the feed has not been eaten after 2 or 3 minutes in the water, you should take it out to prevent sewage. Control the amount of feed each time.

5. Why do frogs change their body color?

There are many types of pigment cells on frog skin: melanocytes with black or brown pigment granules, xanthophytes with yellow pigment granules, erythrophytes with red pigment granules, iridophytes with many reflective crystal platelets, etc.

The skin consists of two layers: the epidermis and the dermis. Several pigment cells are found in the dermis, while only smaller melanocytes are found in the epidermis. Since the epidermis is thin, the colors in the dermis can show through. When a frog is in a dark environment, the environmental phenomena perceived by the eyes are transmitted to the middle lobe of the pituitary gland through nerves, causing it to secrete melanin, which diffuses melanin and shrinks red and yellow pigments. In this way, red and yellow colors fade away, while melanin is very noticeable, and the frog becomes dark. The change in the frog's body color is mainly the result of the participation of larger melanocytes in the dermis.

Environmental temperature and adrenaline can also cause frogs to change their "fashion." When the temperature rises, the color becomes lighter; when the temperature drops, the color becomes darker. At the same time, lighter body color means less heat absorption; darker body color means more heat absorption, which is beneficial for their body temperature regulation. If adrenaline is injected into the frog's body, the body color will also become lighter as the blood pressure rises.