Gonopodium: Particular to the Live-bearing tooth carps, the gonopodium is a modified anal fin of male fish that has been converted into a genital organ.
Gonopodium
Particular to the Live-bearing fish, the gonopodium is the pelvic fin of the male fish that have been converted into genital organs.
Gonopodium - Modified Anal Fin in male Livebearers, used to transfer sperm to females.
· Gonopodium = Gk word that is used for the external organ of ♂♂ livebearer fishes that is used to transfer sperm into the body of the ♀♀. In fact it is the modified anal fin
· Gregarious = organisms living in groups
· H ...
The gonopodium is a modified anal fin which is used to fertilize eggs. In the male the anal fin is rod shaped, while the female has a traditional fan shaped anal fin (see photo above).
Note that gonopodium can only move in one direction
The maleness of Anableps is not subtle. What starts out as a normal-looking anal fin forms into a substantial gonopodium. No fragile-looking bony appendage such as you see on a guppy or swordtail.
Males have a gonopodium and longer ventral fins.
Breeding
Anywhere between 20-100 fry may be produced.
SEX:Males possess a modified anal fin known as a gonopodium which is pointed unlike the "fin-shaped" anal fin of the females.
B :Livebearers are well-known for their prolific breeding.
The male`s anal fin, transformed into a gonopodium (reproduction organ). The 3rd, 4th and 5th rays of the anal fin are prolonged into a tube through which the spermatozoids will get into the female genital system.
As the male matures the Anal fin develops into a structure for reproduction called the Gonopodium. The Gonopodium can be moved in almost any direction and stores the sperm in packs called spermatophores.
The male's anal fin is modified into a gonopodium by which he transfers sperm into the female.
The male live bearer introduces his sperm directly into the female's body using his anal fin, which is typically modified into a tubelike projection called a gonopodium.
Fertilization is internal and is accomplished by means of highly modified fin elements within the anal fin of males that form a structure known as the gonopodium.
A: The nice thing about livebearers is that males have a "sex organ" called the gonopodium.
The male impregnates the female by using a modified anal fin called a gonopodium. The fertilised eggs remain inside the female until they hatch and the live young are born as free-swimming miniature versions of their parents.
In addition, like other livebearers the male has a sex organ called a gonopodium, which acts as a sperm-delivering device (similar to a penis in mammals). The female does not have a gonopodium she has a vent.
The male is also slimmer and has a "sword" shaped anal fin called a gonopodium. The female has a fan shaped anal fin, is rounder of body, and will have a spawning patch at breeding time.
Breeding: Males are identified on their stronger colors and their gonopodium. Condition your halfbeaks by feeding them artemia and mosquito larvae. Water conditions should preferable be pH 6.5 and a water temperature 24°C /75° F.
If a female remains stationary and her partner contacts her vent with his gonopodium, she is fertilized. The sperm is preserved in the female's oviduct, and so even after males are removed, a female is capable of having six or more broods.
Sexing Information: Males have a gonopodium and females are consideraly larger than males.
Diet: Carnivorous - prefers live insect type foods but will accept flakes or pellets.
Temperment: Peaceful schooling fish ...
Sexual dimorphism:Besides the gonopodium in male animals remain the females smaller.
Prices:Netherlands: 3-4€, true sailfins are really hard to get and the prices can be exorbitant.
The name Xenophallus was given to this fish because of it's unusual gonopodium. It has a series of hook like structures that are easily visible with the naked eye.
Males can be sexed by the bright colours and gonopodium which appears to be too large for the fish. The broods are not large in number, from 20 upwards but the fry are at a size where they can accept powdered foods and artemia.
Gravel: Basic bedding for any aquariums, make sure you have enough in your tank.
Gonopodium: An modified anal fin which is elongated. Only appears on the males, which helps to fertilize the females.
As with all woodcats, mature males exhibit a modified anal fin similar to the gonopodium found on many live-bearing toothcarps such as the guppy, platy, molly etc.
Habitat Information
Distribution ...
Die Anale der Männchen ist ganz oder teilweise zu einem Begattungsorgan (Gonopodium) umgebildet.
Brachyrhaphis episcopi
Bischofskärpfling ...
The males get the "Black Chin Livebearer" name from the large amount of black from the base of their mouth right down to the tip of their elongated gonopodium and along the base of the body to the caudal fin.
They are easy to sex, as the female is larger, and the male has a rod-like anal fin called a gonopodium that he uses to internally fertilize the female. After fertilization, the female can produce multiple batches of babies without a male present.
The Blue Platy is a livebearer capable of reproducing at three to four months of age. The male is smaller and more brightly colored than the female, and can be distinguished by his gonopodium.
However, if you want to breed good-quality guppies you will need to be selective. Choose a pair of guppies that have the color, finnage and size you like. Males are brighter in color, smaller and have a modified anal fin called a gonopodium.
 See also: Fish, Water, Livebearer, Livebearers, Species
|
