1. The secret of the trout
The trout is a marine fish species widely distributed in the Indian, Pacific and Atlantic Oceans, which can freely sneak and inhabit at 50-500 meters underwater. Unexpectedly, since the establishment of the modern scientific system, the mating and reproduction methods of the trout have been plaguing scientists, and various hypotheses and speculations have emerged in an endless stream, among which the most supporters are: the eel is similar to the earthworm is hermaphrodite, self-propagating; or like the yellow eel laying eggs, the ovaries are immediately transformed into sperm nests, from female to male.
Modern scientific researchers have found that the trout is still a normal breeding method, but the relationship between females and males is too strange.
The body of the trout is short and conical, the head is large and flattened, and it has a large and flat mouth, and the edge of the two sides of the large mouth is a row of sharp teeth with pointed inwards, which can be described as ugly. Although ugly in appearance, but low in fat, low in cholesterol, and the meat is firm, elastic enough, excellent taste, trout in Japan is one of the top ingredients in fish, often found in high-end places.
What really interests scientists is the two peculiarities of the trout: first of all, the trout will glow, the head of the trout has a fleshy bulge, the shape resembles a miniature version of the lantern hanging outside the rural door, and after the trout dives into the deep sea of 400/500 meters, the photon and oxygen secreted by the glandular cells that control the small lantern are chemically oxidized to produce light. Fish have a tendency to light, and the trout lures the surrounding fish through the light of the small lantern and hunts them again, and can eat a big meal each time.
Secondly, the size differences between females and males. Females are 1-1.2 meters long, while males are only 8-16 cm long, and such a disparity in body length is incredible. What is even more surprising is that Japanese fishermen once caught a pair of trout, the female trout is more than 1 meter long, while the male trout is only 2 cm, and the restaurant chef mistakenly believes that this is the undigested food of the female trout.
2. Mating of trout
One of the strange relationships between female and male trout mentioned at the beginning is the huge disparity in size, so the question is, how do they mate?
It turns out that female trout and male trout are similar to "parasitic relationships", eating and drinking Lazar are inseparable. After the trout hatches their young eggs, these young trouts, who have barely learned to eat, begin to hurry to "find a partner", followed by "worship and marriage". The problem is that female trout grow fast and are dozens of times larger than males of the same age. At this time, male trout completely release the disposition of "marrying and following wife", and they either run under the gill cover of the female squid or attach to the abdomen or side of the female trout.
Over time, the lips and body of the male trout gradually stick together with the skin of the female trout, and often because the female grows too quickly, the skin and flesh are squeezed and covered in the direction of the male trout, and finally in addition to the male trout's nest bare and continuing to grow outside, the male's eyes, lips and other organs all stop developing, or even "disappear". At this time, the male trout completely lost the ability to forage, and all relied on the blood of the female to "survive".
Scientists point out that the reason why male trout live so "humbly" is because of self-sacrifice for reproduction. The trout is a deep-water fish, although it can emit light, but after all, the brightness is limited, the best way for smooth mating is to be able to easily find each other. It can be said that this alternative way of marriage is very helpful in the endless sea to improve their fertilization rate.
The way the trout mating is also very different. The female trout first excretes a flaky gel-like egg, which is used to adsorb the sperm of the male trout floating in the seawater, waits until the egg and sperm combine to form a fertilized egg and then floats for several days, and then sinks to the bottom of the water until the cubs are finally hatched.
The trout is a typical "polygamous system", who makes the female trout so "powerful"? In fact, the relationship between them is far from as simple as imagined. Due to the excessive size of male trout, there is no chance of communication between these male trout looking for objects, and in many cases several males flock to the female squid, attach to the female skin and not go, eventually forming a "polygamous";
In addition, most of the male trout attach to the skin of the female, the female activity, foraging process will have collisions, scratches, the male light injury, the focus is lost. In order to ensure the completion of fertilization, the female will also take the initiative to "marry" several more husbands.
As a member of the ocean, the trout has evolved its own unique breeding method to adapt to the environment, and has to lament the magic of nature. In addition, in recent years, this kind of ugly appearance, high nutritional value, delicious ingredients are increasingly favored by high-end diners, and it is estimated that the price will continue to rise.
Original: Old High