Live-bearing aquarium fish , often called livebearers , is a fish that stores eggs in the body and gives birth to life, swimming freely young. Among the aquarium fish, livebearers are almost all members of the Poeciliidae family and include guppies, mollies, platies and swordtail.
The advantage of livebearing to the aquarist is that newborn teenagers are larger than newly hatched, have a lower chance of death and are easier to treat. Unusual wild animals include sea horses and pipefish, in which men take care of the young, and certain cichlid are mouthboders, with the mother incubating the egg inside the oral cavity.
Video Live-bearing aquarium fish
Living creatures for public aquariums
The species of interest to aquarists are almost always members of the Poeciliidae family, most often guppies, mollies, platies, swordtails, livebearer endler, and mosquito fish. Most are ovoviviparous, with developing embryos receiving no food from the mother fish, but few are vivipar, receiving food from the mother's blood supply.
A live-bearing aquarium fish, often just called livebearers, is a fish that preserves the eggs inside the body and gives birth to life, swimming freely young. Because newborns are large compared to fish laying eggs, they are easier to feed than egg fry, such as characins and cichlids. This makes them easier to raise, and for this reason, aquarists often recommend them for beginners to cultivate fish. In addition, being much larger makes them much more vulnerable to predation, and with adequate cover, they can sometimes mature in community tanks.
Maps Live-bearing aquarium fish
ovoviviparous and viviparous fish compared
Most of the Poeciliidae are ovoviviparous, that is, while the eggs are stored inside the female body for protection, the eggs are basically free of the mother and he does not give them nutrients. In contrast, fish such as splitfins and viviparous halfbeaks, with eggs receiving food from the mother's blood supply through structures analogous to the placenta of placental mammals.
Unloved residents and mouth lovers
Sea horses and pipefish can be defined as livebearers, although in this case men incubate eggs rather than females. In many cases, eggs depend on males for oxygen and nutrients, so these fish can be further defined as vivipar livebearers.
Many cichlids are mouthbrooders, with women (or more rarely men) incubating eggs in the buccal cavity. Compared with other cichlid, these species produce fewer but larger eggs, and when they arise, the fry is better developed and has higher survivability. Because eggs are protected from the environment but do not absorb the nutrients from the mother, this condition is analogous to, though not identical to, ovoviviparity.
Gallery of livebearer fish
External links
- The American Livebearer Association
- The British Livebearer Association
- Keep & amp; Breeding Halfbeaks Includes graph of growth rate and image of newborn fish.
- How to Keep Livebearers
Source of the article : Wikipedia
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