Reproduction and breeding of swordtail fish
The morphological characteristics of swordtail fish The swordtail fish, also known as swordfish, clear swords, and flower families, are native to southern Mexico and Guatemala.
The original species of swordtail fish is the blue swordfish, which has a light blue color, a long spindle and a flat body with a body length of up to 12 cm. Male fish have sword tails, dorsal fins have red spots, females have no tails, and dorsal fins have no spots.
After the artificial rearing of swordtail fish, the body shape is small, only 7-8 cm. The body is olive-green with brown rims on the edges, a dark red stripe from the lid behind the lid to the tail, a light blue banding above and below the stripe, a silvery abdomen, and red spots on the dorsal fins. After artificial and moonlight hybridization, and continuously optimizing the cultivation, many new species of swordtail fish have emerged, including swordfish, swordfish, swordfish and so on. At present, there are more species of red swordfish, which are divided into two types according to the shapes of the dorsal and caudal fins: one is the dorsal fins which are tall and wide, and the upper and lower ends of the caudal fins have sword-like extensions of tall finned swallowtail red swords; the other are males. The dorsal fin is long, with a high fin flaming red sword on the lower end of the caudal fin. Some sword tails have single and double tails.
The rearing of swordtail fish requires that the swordtail fish is adaptable and easy to feed and can tolerate low temperatures of 5 degrees Celsius in a short time. Swordtail fish do not require strict water quality, and can live and breed normally in weakly acidic, neutral or weak alkaline water. The suitable water temperature is 20-25 degrees Celsius. The water for the swordtail fish should have sufficient dissolved oxygen to enable it to move in the middle and lower waters. If there is less dissolved oxygen in the water, they will float on the surface of the water. When there is severe lack of oxygen, some males will jump out of the water.
Swordtail fish is mixed and has a large amount of food. It does not harm other fish and can be mixed. The water temperature of the swordtail rearing should not be too high. Long-term high temperatures can shorten its life span. Because of its peculiar male shape, the swordtail fish is popular among people and is an indispensable tropical fish species in aquariums. The life of swordtail fish is about 3-5 years. When the fish dorsal fin is found to be slightly raised, it indicates that the fish body has entered the aging stage.
The male and female of swordtail fish are not difficult to distinguish between male and female of swordtail fish. The male body is relatively slender with bright body color. There is a sword below the tail fin. The ends of the fins are all pointed. The most obvious is that the anal fin has been converted into sexual intercourse. Device. The female body is more hypertrophic than the male, and its body color is inferior to that of the male. The ends of the fins are relatively blunt. There is no sword under the tail fin, and there is no protruding transfer device. The vent hole is more obvious.
What is the “sex transfer†of the female swordtail? The so-called female “sex transfer†refers to the gradual maleization of a portion of females that have larvae: a slender shape, a sword-like protrusion below the caudal fin, and an anal fin transformation. For a rod-shaped connector, start chasing females, mating and fertilizing them, and breeding offspring. However, only females turned males and no male males were found.
In response to this question, some people have recently proposed different opinions: They believe that the swordtail fish cannot be sexually reversed, and their male-female ratio is always 1:2 to 1:1.5. Although larvae of swordtail fish grow to 3 months, the male and female reproductive organs begin to develop, but by 7-8 months of age, sexual organs can mature and stabilize. For this issue, we can continue to explore and study in future practice.
The breeding of swordtail fish swordtail fish eggs raw fish. The swordtail fish is very fertile and enters sexual maturity at 6-8 months of age. Males start chasing females and mate with the females to complete fertilization. The fertilized eggs hatch into larvae in the female body and are eliminated from the body.
Swordtail fish breed easily without special management. When breeding, fishes with a size of 5 cm or more must be selected. The proportion of males to females should be 1:1 or 2:1. The bottom of the tank should be covered with soft leaves and some live baits should be fed. The female abdomen begins to inflate and dark fetal patches appear after the pregnancy and the male fish should be removed. 20-30 tails of larvae are born at the beginning of each fetus, and as many as 200 tails are later. Within 3 months after larvae are born, the temperature of the water must not change much, and it is best to keep around 24 degrees Celsius.
Feeding water temperature at 20-28 degrees Celsius, swordtail fish once every 5-8 weeks, suitable for breeding water hardness of 6-9 degrees. pH7-7.2.
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