In the vast natural world, many animals are born with the skill of "transgender", either by environmental influences or for the purpose of reproduction.
oysters
Most oysters are hermaphrodite, but a small percentage of oysters are hermaphrodite. Oyster denaturation is a choice made based on its environment.
Oysters have two phases, the female phase is dominant when the protein metabolism is strong, and the male phase is dominant when the carbohydrate metabolism is strong.
In fact, nutritional conditions are not the only factor that determines the sex of oysters, but the phenomenon of male pre-ripening of oysters is the determinant of their denaturation.
Many oysters are male in their infancy but have both gonadal glands and can switch back and forth between male and female. Usually, sperm form more than eggs, so when they mature at first time, oysters are mostly males, and the sex of the second year is determined by nutritional conditions.
The more favorable the nutritional conditions, the more vigorous the growth of egg protocells in the body, the higher the female oyster ratio, and vice versa, the higher the male ratio.
Moray eels
Moray eels are hermaphrodites and are capable of transsexuality anytime, anywhere. The sex transformation of moray eels is determined by the environment in which they live.
When the environment in which they live is limited and there is not enough food, or when the density of the same species is higher and the competitive pressure is greater, the moray eel will become male, which is convenient for them to increase their strength and plunder food.
When food is plentiful or the surrounding environment is not harsh, moray eels become females. According to the situation of the environment, it can be said that it is the wisdom of the survival of moray eels.
grouper
Groupers are naturally "transgender", and they mostly degenerate at dusk throughout the day. Unlike other creatures that can only be denatured once in a lifetime, groupers can be denatured multiple times a day.
This kind of transgender occurs when two groupers mate, one of which is first a female and the other is a male, and after mating, they exchange genders and roles and reproduce again.
In the eyes of scientists, this magical phenomenon is mostly due to the fact that the eggs of groupers are too large, if only the females are allowed to lay eggs, the consumption of female physical strength and life is too large, if both the male and female undertake the task of sperm and ovulation, it will not only reduce the pressure on the females, but also be more conducive to the reproduction of organisms.
Clownfish
In nature, males generally have an advantage in strength, but in the process of transgendering, not all organisms change from females to males, of which the clownfish is a typical "negative representative".
In the sea, the clownfish and the anemone are in a state of close symbiosis, and an anemone can usually only accommodate two clownfish to live, due to space limitations, the two clownfish can only be "gracious and love to the white head".
In terms of reproduction, how many offspring a clownfish can produce is not related to the number of sperm in the male, but depends on the amount of eggs laid by the female. Therefore, when the female has an absolute body advantage, it is most beneficial to reproduction.
In this case, the clownfish develops into a male when it is small, and it is better to wait until the body is fully developed and then become a female.
In addition to their own factors, the gender transition of clownfish is also affected by the real environment: when the males lose their mates, they will change their gender, and then look for a male fish smaller than themselves to combine, and then spawn themselves. Through gender transition, a new family is established.
Frogs
In addition to spontaneous transformations, frogs become more denatured from changes in their living environment.
Researchers accidentally observed that the African claw frog can be freely degenerated in the laboratory, and then researchers found that more and more male frogs became female frogs outdoors, and with the transgender, the reproductive organ function of the African claw frog was also fully transformed, but this was not a normal natural process. The culprit of this change is a herbicide called "atrazine."
This herbicide is strictly prohibited in many places, and once it enters the river basin, it will destroy the sexual development of frogs, inhibit the production of male hormones in frogs and promote the improvement of female hormones.
Following climate change, habitat loss and species invasion, the arrival of this herbicide has brought devastating disasters to frogs.
The transgendering of nature is simple and direct, and perhaps this is the ultimate meaning of "casual". No matter how many times you change, you are finding a way of survival that suits you and your race in a fierce environment.