Overview

Comprehensive Description

Biology

Inhabits small rivers with little current and in swamps where they are very common. Forms groups where the males dominate to defend their territory. Is highly appreciated by aquarists (Ref. 12225). Feeds on worms, crustaceans and insects (Ref. 7020). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 60 cm (Ref. 51539).
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Distribution

South America: native in the rivers of Guyana south to the Amazon basin and up the Amazon River to the Negro River.
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Rivers of Guiana south to Amazon River basin and up Amazon River to Negro River: Brazil, French Guiana, Guyana and Suriname.
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Physical Description

Size

Maximum size: 65 mm SL
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Max. size

6.5 cm SL (male/unsexed; (Ref. 7020))
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Ecology

Habitat

Environment

benthopelagic; freshwater; pH range: 6.0 - 8.0; dH range: 5 - 19
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Diseases and Parasites

Livoneca Infestation. Parasitic infestations (protozoa, worms, etc.)
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Life History and Behavior

Life Cycle

At spawning time in captivity, male and female swim alongside one another. Several batches of 1 to 5 eggs are laid among the fine-leaved plants, with a total of up to 200 eggs in some cases; eggs hatch in 30 to 40 hours and fry are free-swimming about six days after (Ref. 7020). Between 24°-27°C, eggs hatch in 24 hours (Ref. 205).
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

aquaculture: commercial; aquarium: commercial
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Wikipedia

Nannostomus beckfordi

Nannostomus beckfordi, commonly known as the golden pencil fish, is a freshwater species of fish belonging to the genus Nannostomus in the Lebiasinidae family of characins.[1] It occurs widely and commonly in swamps and slow moving waters in Brazil, Guyana, French Guiana and Suriname.[2]

References[edit]

  1. ^ "Nannostomus beckfordi". Integrated Taxonomic Information System. Retrieved Feb 12, 2012. 
  2. ^ Froese, Rainer and Pauly, Daniel, eds. (2011). "Nannostomus beckfordi" in FishBase. November 2011 version.


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