Arnoldichthys spilopterus — Details

Redeye Characin learn more about names for this taxon

Overview

Comprehensive Description

Biology

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Feeds on worms, insects and crustaceans. In aquaria, female lays up to 1000 eggs, after vigorous driving by the male, which hatch in 30 to 34 hours (Ref. 7020). Aquarium keeping: in groups of 5 or more individuals; minimum aquarium size 100 cm (Ref. 51150).
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Distribution

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Africa: lower Niger and Ogun rivers in Nigeria.
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Range Description

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This species is endemic to Nigeria where it is restricted to the lower Ogun to lower Niger rivers.
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Africa.
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Physical Description

Morphology

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Anal spines: 3; Analsoft rays: 11
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Size

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Maximum size: 96 mm SL
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Max. size

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9.6 cm SL (male/unsexed; (Ref. 2880))
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Diagnostic Description

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Parietal fontanel absent. Sexual dimorphism on anal fin: females - hyaline with black spot on rays beneath adipose fin, males - lemon yellow (sometimes red-yellow) with 5 dark or black bands and colored margin. Two lateral bands, upper red-orange, lower blue-green. Upper part of eye red. Dorsal with black spot lined with a clear zone which occupies 2/3 of the anterior portion of the dorsal. Scales below lateral big. Caudal stripe extending in middle of caudal fin from base to fork.
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Ecology

Habitat

Environment

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pelagic; freshwater; pH range: 6.0 - 8.0; dH range: 5 - 19
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Habitat and Ecology

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Habitat and Ecology
A pelagic riverine fish that feeds on worms, insects and crustaceans. In aquaria female lays up to 1,000 eggs, after vigorous driving by the male, which hatch in 30 to 34 hours. Grows to 9.6 cm in standard length.

Systems
  • Freshwater
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Trophic Strategy

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Feeds on worms, insects and crustaceans.
  • Paugy, D. 1990 Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Diseases and Parasites

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Viral Diseases (general). Viral diseases
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Hidden Viral Infection. Viral diseases
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Arnoldichthys spilopterus

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The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Arnoldichthys spilopterus

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
VU
Vulnerable

Red List Criteria
B1ab(ii,iii,v)+2ab(ii,iii,v)

Version
3.1

Year Assessed
2010

Assessor/s
Olaosebikan, B.D. & Lalèyè, P.

Reviewer/s
Abban, K. & Darwall, W.

Contributor/s

Justification
This species is found fewer than 10 locations in Nigeria mainly in a region affected by oil exploration and the other by deforestation. The extent of occurrence and area of occupancy thresholds are estimated at less than 20,000 km² and less than 2,000 km², respectively. As the quality of habitat is also declining it qualifies as Vu B1ab(iii)+2ab(iii). Sub criterion c is not applicable because there is no evidence of extreme fluctuation in EOO or AOO.
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Population

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Population
No available data.

Population Trend
Unknown
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Threats

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Vulnerable (VU) (B1ab(ii,iii,v)+2ab(ii,iii,v))
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Major Threats
Since there is an extensive aquaria trade in this fish, mainly by wild capture, it can be inferred that the stock may be on a downward trend. This is coupled with deforestation and pollution in it ranges resulting in habitat loss and decline in quality.
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Management

Conservation Actions

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Conservation Actions
No avalaible data.
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Relevance to Humans and Ecosystems

Benefits

Importance

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aquarium: commercial
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Wikipedia

Arnoldichthys spilopterus

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Arnoldichthys spilopterus, the Niger tetra, is a characin endemic to Nigeria.

Contents

Information

The Arnoldichthys spilopterus is kept as an aquarium fish. It is the only member of its genus. It is considered to be a freshwater species that are found in a pelagic range within a tropical climate. The average length of the Arnoldichthys spilopterus as an unsexed male is about 9.6 centimeters or about 3.7 inches. Their diet consists of worms, insects, and crustaceans. When kept in an aquarium for breeding, a female can lay about 1,000 eggs. They can hatch between the time of 30-34 hours. If kept in an aquarium, it is recommended to keep a group of at least five of this species together. The minimum size of an aquarium that is adequate for this species is about 100 centimeters.[1] This species is considered to be vulnerable to becoming an endangered species. In Nigeria this species is found in less than ten different areas. Another influence that affects the population of this species in its natural state is oil exploration, deforestation, and pollution. There is also a population trend that is decreasing due to the fish trade that the Arnoldichthys spilopterus has become a part of for the aquatic system and commerce. [2]

Classification

The taxonomic classification of the Arnoldichthys spilopterus is as follows:

  • Kingdom-Animalia
  • Phylum-Chordata
  • Class-Actinopterygii
  • Order-Characiformes
  • Family-Alestidae[2]

References

  1. ^ "Arnoldichthys spilopterus". Fish Base. http://www.fishbase.us/summary/Arnoldichthys-spilopterus.html. Retrieved 11 March 2013.
  2. ^ a b "Arnoldichthys spilopterus". International Union for Conservation of Nature and Natural Resources. http://www.iucnredlist.org/details/182186/0. Retrieved 11 March 2013.

Notes

Stub iconThis Characiformes-related article is a stub. You can help Wikipedia by expanding it.
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