Taxonomy

Animalia Chordata Vertebrata Amphibia Anura Hyperoliidae Afrixalus Afrixalus nigeriensis

Taxonomic notes: This species is closely related to Afrixalus equatorialis (Schiøtz 1999).

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Geographic Range

This species ranges from extreme southeastern Guinea through Liberia, Côte d’Ivoire and western Ghana, with a disjunct population in southwestern Nigeria. In 2010, it was found in the Yaya Classified Forest (Alépé region, southeast Côte d'Ivoire) (N.G. Kouamé pers. comm. May 2012), and in Atewa in Ghana in 2006 (N.G. Kouame pers. comm. June 2012).
In  Côte d' Ivoire it is found in lowland areas (500-1,000 m asl). In Atewa, the highest peak is 842 m asl. Using the range as a proxy, the extent of occurrence (EOO) was estimated to be 245,625 km2.

Is the elevation range stated for Côte d' Ivoire reflective of the species' elevation range elsewhere? Also, is there an estimate availbale for the number of threat defined locations? EJM

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This species was recently recorded in southeast Liberia in the Sinoe County about 75 Km east of Greenville (August 2013). No previous herpetological investigation have been carried here and this observations extends the known range of the species in Liberia.

Posted by lgonwouo over 10 years ago
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Population

This species is rare in southeastern Côte d' Ivoire and in Atewa (N.G. Kouame pers. comm. June 2012).

Comments

Our observations in August 2013 reveals the species to be common. Several individuals (more than ten per breeding site) found around suitable water ponds during night searches. We predict this period to be the peak of the reproduction season.

Posted by lgonwouo over 10 years ago
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Habitat

It is found mostly in primary rainforest, although it has recently been recorded in farm bush (degraded forest and farmland) (Hillers and Rödel 2007) and regenerating secondary forest along an old logging road (Gonwouo pers. comm. May 2012). It is often found with Afrixalus dorsalis but separated by microhabitat preferences, with A. dorsalis using more open, exposed sites, and A. nigeriensis calling from dense vegetation. During breeding, the eggs are laid on leaves overhanging temporary ponds, into which the larvae fall and develop.

There was uncertainty about the description of the species' microhabitat preferences, is the above accurate? EJM

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Use Trade

There are no reports of this species being utilized.

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Threats

It is losing much of its habitat as a result of agricultural encroachment (coffee and cacao plantations in Liberia, Côte d' Ivoire and Ghana), expanding human settlements, and logging.

Comments

This species is a primary forest habitat specialist but could venture in secondary forest where suitable reproduction ponds occur. Forest convertion to agricultural farm land for rice, cassava and sellective logging by industrial companies are some of the measure threats.

Posted by lgonwouo over 10 years ago

Thanks for all your comments, much appreciated. They will be added to the assessment. Did you agree with the Red List category given to this species?

Posted by eveismorris over 10 years ago

Although the species may have a broad range, continous impact on its habitat is a major threat and for this reason I agree with the Red List Category given to the species

Posted by lgonwouo over 10 years ago
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Specific Threats

  • 2.1.2 Small-holder farming
  • 2.1.1 Shifting agriculture
  • 1.1 Housing & urban areas
  • 5.3.5 Motivation Unknown/Unrecorded

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Conservation Actions

This species occurs in several protected areas, including the Yaya Classified Forest in southeastern Côte d'Ivoire (N.G. Kouame pers. comm. May 2012) and in Atewa in Ghana (N.G. Kouame pers. comm. June 2012). Research is needed for the life history of this species.

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Specific Actions

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    Red List Rationale

    Listed as Near Threatened since, although this species is still relatively widely distributed, it largely depends on areas of undisturbed forest habitat. Thus its area of occupancy is probably not much greater than 2,000 km², and the extent and quality of its habitat is declining, thus making the species close to qualifying for Vulnerable under criterion B2ab(iii).
    According to our records this species may not have been formally reassessed. The current assessment relies on an estimate of the AOO; it would make this a more robust assessment if this could be confirmed with reasoning. To qualify for the VU category, an estimate of the number of threat-defined locations or evidence that the population is severely fragmented (according to the Red List guidelines) is needed. EJM

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    Bibliography

    • Rödel, M.-O. 2000. Les communautes d'amphibiens dans le Parc National de Tai, Cote d'Ivoire. Les anoures comme bio-indicateurs de l 'etat des habitats. Rapport de Centre Suisse de la Recherche Scientifique, Abidjan: 108-113.
    • Rödel, M.-O. and Branch, W.R. 2002. Herpetological survey of the Haute Dodo and Cavally forests, western Ivory Coast, Part I: Amphibians. Salamandra: 245-268.
    • Rödel, M.-O., Gil, M., Agyei, A.C., Leaché, A.D., Diaz, R.E., Fujita, M.K. and Ernst, R. 2005. The amphibians of the forested parts of south-western Ghana. Salamandra: 107-127.
    • Schiøtz, A. 1963. The amphibians of Nigeria. Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening: 1-92.
    • Schiøtz, A. 1967. The treefrogs (Rhacophoridae) of West Africa. Spolia Zoologica Musei Hauniensi 25: 1-346.
    • Schiøtz, A. 1999. Treefrogs of Africa. Edition Chimaira, Frankfurt am Main.

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