Английская Википедия:Betta

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Шаблон:Short description Шаблон:About Шаблон:Pp-move-vandalism Шаблон:Pp Шаблон:Automatic taxobox

Betta Шаблон:IPAc-en is a large genus of small, active, often colorful, freshwater ray-finned fishes, in the gourami family (Osphronemidae).[1] The best known Betta species is B. splendens, commonly known as the Siamese fighting fish and often kept as an aquarium pet.

Characteristics

All Betta species are small fishes, but they vary considerably in size, ranging from under 2.5 cm (1 in) total length in B. chanoides to 14 cm (5.5 in) in the Akar betta (B. akarensis).[1]

Bettas are anabantoids, which means they can breathe atmospheric air using a unique organ called the labyrinth. This accounts for their ability to thrive in low-oxygen water conditions that would kill most other fish, such as rice paddies, slow-moving streams, drainage ditches, and large puddles.[2]

The bettas exhibit two kinds of spawning behaviour: some build bubble nests, such as B. splendens, while others are mouthbrooders, such as B. picta. The mouthbrooding species are sometimes called "pseudo bettas", and are sometimes speculated to have evolved from the nest-builders in an adaptation to their fast-moving stream habitats.[3]

A phylogenetic study published in 2004 concluded tentatively that bubble-nesting was the ancestral condition in Betta, and that mouthbrooding has evolved on more than one occasion in the history of the genus. However it was unable to establish a correlation with any of three habitat variables studied: whether a species was found in lowland or highland streams, whether it was found in peat swamp forests, and whether it was found in water with fast or slow currents.[4] Mouthbrooding species tend to exhibit less sexual dimorphism, perhaps because they do not need to defend a territory as the bubble-nesters do.[4]

Name

Siamese fighting fish (B. splendens) are frequently sold in the United States simply as "bettas". In fact, Шаблон:As of, around 73 species are classified within the genus Betta.[1] A useful distinction is that while the generic name Betta is italicized and capitalized, when used as a common name it is usually neither italicized nor capitalized.[5] The common name of B. pugnax, for example, is thus Penang betta.

Файл:Kampffisch betta splendenscele4.jpg
Betta splendens, the Siamese fighting fish, is often referred to simply as a "betta" in the U.S.

The name Betta (or betta) is pronounced Шаблон:IPAc-en;[5] the first part is the same as the English word bet. The name is often pronounced Шаблон:IPA in American English, and may be spelled with one 't'. The name of the genus is derived from the Malay term ikan betah ("persistent fish").[6]

The vernacular name "plakat", often applied to the short-finned ornamental strains, derived from pla kad which means "fighting fish", is the Thai name for all members of the B. splendens species complex (All have aggressive tendencies in the wild and all are extensively line-bred for aggression in eastern Thailand). The Thai phrase is not restricted to one specific strain. The term "fighting fish" is generalized to all members of the B. splendens species complex, including the Siamese fighting fish.[7][8]

Diet

Wild Betta fish are hardy and eat almost any animal small enough for these small fish to consume, including worms, larvae of mosquitoes or other insects, and smaller fish. Their natural environment is often resource-limited, so many Betta species are generalist feeders.

Bettas as pets

Bettas are commonly kept as pet fish, especially Siamese fighting fish. Bettas are popular fish due to their color variety and ease to care for, although the males must be kept separated from other bettas.[9]

Conservation

While many Betta species are common and B. splendens is ubiquitous in the aquarium trade, other bettas are threatened. The IUCN Red List classifies several Betta species as Vulnerable. In addition, B. livida is Endangered, and B. miniopinna, B. persephone, and B. spilotogena are Critically Endangered.[10]

The United Nations Environment Programme lists an unconfirmed species, Betta cf. tomi, as having become extinct in Singapore between 1970 and 1994.[11] This likely refers to the extirpated Singaporean population of B. tomi, which continues to exist in the wild in Indonesia and Malaysia, as well as in captivity; the Red List classifies it as Vulnerable.[12][13]

Species

Файл:Betta smaragdina pair1.jpg
A pair of Betta smaragdina
Файл:Betta tussyae (male) 2010-04-01.JPG
Male Betta tussyae

There are currently 76 recognized species in this genus. The currently described Betta species can be grouped into species complexes:[1][14][15][16]

References

Шаблон:Reflist

External links

Шаблон:Taxonbar Шаблон:Authority control

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  1. ↑ 1,0 1,1 1,2 1,3 Шаблон:FishBase genus
  2. ↑ Marcus Song, Caring for Betta Fish Lulu Press, 2006. Шаблон:ISBN
  3. ↑ Шаблон:Cite web
  4. ↑ 4,0 4,1 Шаблон:Cite journal
  5. ↑ 5,0 5,1 Шаблон:Cite encyclopedia
  6. ↑ Шаблон:Cite web
  7. ↑ Шаблон:Cite web
  8. ↑ Шаблон:Cite web
  9. ↑ Шаблон:Cite web
  10. ↑ Шаблон:Cite web
  11. ↑ Шаблон:Cite web
  12. ↑ Шаблон:Cite web
  13. ↑ Шаблон:Cite web
  14. ↑ Шаблон:Cite web
  15. ↑ Шаблон:ITIS
  16. ↑ Шаблон:Cite journal
  17. ↑ Шаблон:Cite web
  18. ↑ Шаблон:Cite journal
  19. ↑ Шаблон:Cite journal
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