Overview

Comprehensive Description

A. (Chromaphyosemion) bivittatum :

AMNH 97638;

  • Paul V. Loiselle (2006): A review of the Malagasy Pachypanchax (Teleostei: Cyprinodontiformes, Aplocheilidae), with descriptions of four new species. Zootaxa 1366, 1-44: 41-41, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:D12AF7A9-88CB-46F2-9550-2A97D5E91389
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Biology

Restricted to brooks in the coastal rainforest with a calcium containing soil (Ref. 3788). Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139).
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Distribution

Range Description

Aphyosemion bivittatum is restricted to small brooks and streams on calcium-bearing soils in the coastal rain forest of southeastern Nigeria and southwestern Cameroon, from the Lower Cross River as far east as Mundemba.
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Africa: southeastern Nigeria and southwestern Cameroon.
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West-central Africa: Nigeria and Cameroon.
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Physical Description

Morphology

Dorsal soft rays (total): 10 - 13; Analsoft rays: 12 - 15
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Size

Maximum size: 45 mm TL
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Max. size

5.0 cm TL (male/unsexed; (Ref. 27139))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Aphyosemion bivittatum is restricted to small brooks and streams on calciferous soils in coastal rainforest (Wildekamp et al. 1986). It is a benthopelagic, non-migratory species. Aphyosemion bivittatum is not a seasonal killifish. This species is difficult to maintain in aquarium (Huber 1996).

Systems
  • Freshwater
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Environment

benthopelagic; non-migratory; freshwater; pH range: 6.0 - 6.5; dH range: 1 - 6
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Diseases and Parasites

Pop-eye disease. Bacterial diseases
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
B1ab(iii)+2ab(iii)

Version
3.1

Year Assessed
2010

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

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

Contributor/s

Justification
Aphyosemion bivittatum is probably present in more than the five locations currently known, but fewer than 10 locations. It is threatened by habitat deterioration, as well as being specifically targeted for the aquarium. It is therefore assessed as Vulnerable.
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Population

Population
No information available.

Population Trend
Unknown
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Threats

Major Threats
Oil palm plantations pose a threat to the species in the central Africa region. This species is also targeted by the aquarium trade. The main threat to the species is deforestation, pollution and wetland drainage.
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Vulnerable (VU) (B1ab(iii)+2ab(iii))
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Management

Conservation Actions

Conservation Actions
The range in the Cross River is partly included within the Cross River National Park. Further protected areas should be put in place, and habitat maintenance and conservation is required.
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
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Wikipedia

Aphyosemion bivittatum

Aphyosemion bivittatum (Twostripe Lyretail, Two-banded Killi, Red Lyretail) is a species of freshwater fish belonging to the Nothobranchiidae family. It is found in rivers in southeastern Nigeria and southwestern Cameroon.[1]

Appearance[edit]

A. bivittatum has an elongated brightly coloured body with two dark bands running along each side. The males have a maximum body length of approximately 5 cm. It has 10–13 spines in its dorsal fin and 12-15 in its anal fin.[2]

Habitat[edit]

The species is found in small calcium rich steams in the coastal rainforests of southeastern Nigeria and southwestern Cameroon. They are benthopelagic, meaning they float just above the riverbed.[1] They prefer water with a pH of 6 to 6.5 and temperature of 22 to 24oC.[3][4]

A bivittatum has only been observed in five locations and it is thought that they are present in no more than ten. This, along with the threat to their habitat from deforestation, has led them to be classified as vulnerable.[1]

References[edit]

  1. ^ a b c d Lalèyè, P. & Olaosebikan, B.D. (2010). "Aphyosemion bivittatum". IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. Retrieved 8 August 2013. 
  2. ^ Huber, J.H., (1996). "Killi-Data 1996. Updated checklist of taxonomic names, collecting localities and bibliographic references of oviparous Cyprinodont fishes (Atherinomorpha, Pisces)". Société Française d'Ichtyologie, Muséum National d'Histoire Naturelle: 399. 
  3. ^ Riehl, R. and H.A. Baensch, (1991). Aquarien Atlas Volume 1. Germany: Melle: Mergus, Verlag für Natur-und Heimtierkunde. p. 992. 
  4. ^ "Aphyosemion bivittatum (Lönnberg, 1895)". Fish Base. Retrieved 8 August 2013. 
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