Green swordtail


Green swordtail

Taxobox
name = Green Swordtail
status = secure


regnum = Animalia
phylum = Chordata
classis = Actinopterygii
ordo = Cyprinodontiformes
familia = Poeciliidae
genus = "Xiphophorus"
species = "X. hellerii"
binomial = "Xiphophorus hellerii"
binomial_authority = Heckel, 1848
:"For the genus of butterflies commonly known as swordtails, see Graphium."

The Green swordtail ("Xiphophorus hellerii") is a species of freshwater fish in family Poecilidae of order Cyprinodontiformes. It is also called Red swordtail. A live-bearer, it is closely related to the southern platyfish or "platy" ("X. maculatus") and can interbreed with it. It is native to an area of North and Central America stretching from Veracruz, Mexico, to northwestern Honduras.

The male green swordtail grows to a maximum overall length of 14cm (5.5in) and the female to 16 cm (6.3 in).The name "swordtail" is commonly but mistakenly believed to be derived form the elongated lower lobe of the male's caudal fin (tailfin), but is actually derived from the sword shaped anal fin of the male. Sexual dimorphism is moderate, with the female being larger than the male but lacking the "sword". The wild form is olive green in color, with a red or brown lateral stripe and speckles on the dorsal and, sometimes, caudal fins. The male's "sword" is yellow, edged in black below. Captive breeding has produced many color varieties, including black, red, and many patterns thereof, for the aquarium hobby.

The green swordtail prefers swift-flowing, heavily-vegetated rivers and streams, but is also found in warm springs and canals. Omnivorous, its diet includes both plants and small crustaceans, insects, and annelid worms.

"X. hellerii" has become a nuisance pest as an introduced species in a number of countries. It has caused ecological damage because of its ability to rapidly reproduce in high numbers. Feral populations have established themselves in southern Africa, including Natal and eastern Transvaal in South Africa and Lake Otjikoto in Namibia. Significant populations have also established themselves along the east coast of Australia.

One of the most popular tropical aquarium fish, the green swordtail has been bred into various hybrid forms for the aquarium hobby due to its hardiness and suitability for community tanks.

The green swordtail, as the most common of the swordtail species (and in recognition of the fact that many captive-bred color varieties are not green), is typically known simply as the swordtail in the aquarium hobby. It is often designated "X. helleri" (with one "i"), but authorities consider this an orthographic error and the spelling with two "i"s is the valid specific epithet. Due to interbreeding with the southern platyfish or "platy" most "swordtail" in the aquarium are hybrids to some degree.

The males' elongated caudal fins have been found to significantly affect their chances at mating. The presence of a well-endowed male spurs the maturity of females while it inhibits the maturity of juvenile males in the vicinity of the well-endowed male.cite news | title =In the science of sexual attraction, size matters | work =Yahoo! Science News | language =english | publisher =Yahoo! Inc | date =2007-02-13 | url =http://news.yahoo.com/s/nm/20070214/sc_nm/science_size_dc_1 | accessdate = 2007-02-14 ] cite news | last =Choi | first =Charles Q. | title =Male Bling Makes Female Fish Mature Faster | work =LiveScience Animaldomain | publisher =Imaginova Corp. | date =2007-02-13 | url =http://www.livescience.com/animalworld/070213_sight_sex.html | accessdate = 2007-02-14 ] cite news | last =Choi | first =Charles Q. | title =Male Bling Makes Female Fish Mature Faster | work =Yahoo! Science News | publisher =Yahoo!, Inc. | date =2007-02-13
url =http://news.yahoo.com/s/livescience/20070214/sc_livescience/maleblingmakesfemalefishmaturefaster | accessdate =
]

References

External links

*
*
* [http://sogua.mamakcorner.com/81/swordtail-fish/ Swordtail fish]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • green swordtail — žaliasis kalavijuotis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Xiphophorus helleri angl. green swordtail rus. зелёный меченосец ryšiai: platesnis terminas – kalavijuočiai …   Žuvų pavadinimų žodynas

  • Swordtail Breeding — The Swordtail, is a common live bearing aquarium fish, that will breed readily in captivity. In the wild, the only form of this fish is the Green Swordtail, but it has been captively bred to form many different varieties such as the redvelvet,… …   Wikipedia

  • swordtail — noun A species of freshwater fish, Xiphophorus hellerii Syn: green swordtail …   Wiktionary

  • swordtail — /sawrd tayl , sohrd /, n. any of several small, brightly colored, viviparous, freshwater fishes of the genus Xiphophorus, native to Central America, having the lower part of the caudal fin elongated into a swordlike structure: often kept in… …   Universalium

  • Graphium (butterfly) — Graphium Macleay s Swallowtail (Graphium macleayanus) Scientific classification Kingdom …   Wikipedia

  • Xiphophorus — Taxobox name = Xiphophorus image width = 250px image caption = Green swordtail, Xiphophorus hellerii regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Cyprinodontiformes familia = Poeciliidae genus = Xiphophorus genus authority …   Wikipedia

  • List of fishes of India — This is a list of the fish species found in India and is based on FishBase. [Froese, R. and D. Pauly. Editors. 2006.FishBase. World Wide Web electronic publication. [http://www.fishbase.org] , version (05/2006)] AlbuliformesAlbulidae… …   Wikipedia

  • List of fish common names — This is a list of fish common names. While some common names refer to a single species or family, others have been used for a confusing variety of different types; the articles listed here should explain the possibilities if the name is ambiguous …   Wikipedia

  • List of animals displaying homosexual behavior — Selected )] between males. [Dunkle (1991)] [Utzeri (1990)] Mammalselected mammals from the full list* African ElephantBagemihl (1999) page 427] * Brown BearBagemihl (1999) page 441] * Brown RatBagemihl (1999) page 469] * BuffaloBagemihl (1999)… …   Wikipedia

  • Southern platyfish — Conservation status Secure (NatureServe) …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.