To start, determine the kind of your catfish. A lot of them, and almost every subspecies for sex determination takes into account certain external characteristics: color, pectoral fin, upper fin, head, fish sizes, etc.
Look at the length of the rays of the pectoral fins of the catfish dianema. As a rule, in males they are much longer. Body females have more complete and rounded, in males, by contrast, was slim.
If you have aquarium live catfish Sparrow, look at the top fin. In males it is pointed and the females more rounded. Note the profile of the belly in Mature females, he twisted. Males more slender than females.
The Koch catfish, Golden catfish, catfish, speckled catfish, catfish Natterer, leopard catfish, catfish pygmy define sex according to the same characteristics.
Note the color of the catfish tarakathum. Young fish and females lower body is white and adult males have a gray-purple color. Throughout the body of the male is scattered dark spots.
Thoracotomy note the first ray of the pectoral fin. In males it is similar to bone and tongue covered with small teeth. Females have a common structure.
Pay attention to the size of fish. In all varieties of catfish females are much plumper and larger than males and are much paler colored.
If you have catfish-antitrusts, look at their heads. In males, the head has bony outgrowths in the form of small horns. Females have no such appendages.
And finally, if in appearance the sex of catfish could not be identified, remove the fish from the aquarium and look at the belly. Male catfish is immediately evident the presence of a pronounced sexual tubercle with a round hole. In females, the hole oval, and the tubercle is somewhat recessed and not particularly distinguished.
Advice 2 : How to determine the sex of catfish
Flattened body, elongated lips with suction cups, the dermal appendages-whiskers, bright colors - all signs of ancistrus, modern popular inhabitants of aquariums. These loricariidae not only decorate an artificial reservoir, and clean off the excess algae. For a breeder it is important to determine the sex of the fish. This can be done only after the entry of Pets into sexual maturity, otherwise to distinguish males from females would be extremely difficult.
You will need
- - the presence of at least four adult individuals;
- a spacious aquarium;
- - aerator;
- siphon for changing water;
- artificial shelters made of ceramics.
Purchase at least four of ancistrus fry. Usually in nature the ratio of male and female som is 1:1 or 1:2, so if you have multiple instances of view the chances for a married couple increases.
Wait until the fish grow up. Eight month age of aquarium catfish-shiners begin to show sex differences. To year they become bright enough.
Try to determine the gender of soms by their appearance. If all fish of the same litter were kept in the same conditions, females and males will differ in size. With good care and feeding of ancistrus grow very quickly, however, the limit for adults in a large aquarium – 14-16 see this "man" is longer, larger and slimmer of her friends.
Consider the structure of the som. One of the sexual differences of ancistrus – their fins. Those located on the back, Mature females have a lower height. Tail fins "women" is already noticeable.
Important sexual sign catfish-the male is a long, branching "antennae" - the leathery spines on top of its head and on its edges. "Bearded" females are rare; occasionally, some representatives of this genus armored catfishes you can see a small "horns" on the edges of the head.
Observe the behavior of ancistrus that can tell you their gender. Usually the cleaners are calm, are active only at dusk and night. However in a close aquarium, the males often fight among themselves. Females have a more peaceful disposition.
Create the conditions for spawning – then to determine the gender of a catfish during the breeding season would be easy. Replace the water in the tank at 30% volume, lower water temperature (24 degrees), simulate natural rains need strong aeration.
Put on the bottom of the various shelters (hollow ceramic tube and the vessels are elongated). If the aquarium has a heterosexual couple, the result will not keep itself waiting long – ancistrus breed up to six times a year.
Watch out for catfish during the spawning period especially vigilant. Usually the male takes the first bottom cover and received thoroughly clean the sucker. The female sneaks into the nest in the second turn and throws the game in the form of yellow-orange clusters. Making his case, she immediately left the "apartment" and no longer participate in reproduction. Caring father fertilizes the egg and starts: the future of fry fanning fins, bringing fresh water. He vigilantly watches over his offspring. Only after the emergence of fry (about the fifth to sixth day) ancistrus-dad comes to freedom.
If you are unable to distinguish the gender of ancistrus, but I dream to be engaged in their breeding, do not worry. These catfishes have a unique ability inherent to many fish to change their sex. Therefore, even if in the aquarium for a very long time there was not a single female (male), they can appear and successfully participate in the process of reproduction.