West African giraffe

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West African giraffe
Near Kouré, Niger
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Giraffidae
Genus: Giraffa
Species:
G. camelopardalis
Subspecies:
G. c. peralta
Trinomial name
Giraffa camelopardalis peralta
Thomas, 1898
Range in dark orange

The West African giraffe (Giraffa peralta[2] or Giraffa camelopardalis peralta), also known as the Niger giraffe[1] is a species or subspecies of the giraffe distinguished by its light colored spots. Its last self-sustaining herd is in southwest Niger, supported by a series of refuges in Dosso Region and the tourist center at Kouré, some 80km southeast of Niamey.[3][4]

In the 19th century it ranged from Senegal to Lake Chad,[5] yet in 2011 this subspecies only survives in a few isolated pockets containing about 400 individuals in total.[6] All captive so-called "West African giraffe" are now known to be the Kordofan giraffe (G. c. antiquorum).[5]

Evolutionary history

Older studies on giraffe subspecies have caused some researchers to question the separate status of G. c. peralta and the Kordofan giraffe (G. c. antiquorum). Genetic testing published in 2007 confirmed the distinctiveness of the West African giraffe.[5][7][8][9]

Most captive giraffes from northwestern Africa are in French zoological parks, a result of the French colonies in West Africa. Those giraffes were formerly treated as G. c. peralta. However, since genetic analysis revealed that only giraffes to the west of Lake Chad belong to this subspecies, the populations in European zoos are in fact Kordofan giraffes (G. c. antiquorum). The West African giraffe is more closely related to the giraffes of East Africa than to those of Central Africa. Its ancestor may have migrated from East to North Africa during the Quaternary and then to West Africa with the development of the Sahara desert. At its largest, Lake Chad may have acted as a barrier between West African and Kordofan giraffes during the Holocene.[5]

Distribution and habitat

The Nigerien giraffe population relies upon seasonal migration between the relatively drought-resistant lowlands of the Niger River valley and the drier highlands near Kouré. In this area, Tiger bush habitat allows bands of trees to thrive in climates which might otherwise become more typical desert.

Former range

Before

Sahel drought that lasted into the early 1980s, populations identified as G. c. peralta existed in Senegal, Niger, eastern Mali, northern Benin, northern Nigeria, southwest Chad and northern Cameroon. However, recent genetic research has shown that the populations from northern Cameroon and southern Chad actually are the Kordofan giraffe (G. c. antiquorum).[5] Therefore, the giraffes that remain in Waza National Park (Cameroon) belong to the Kordofan giraffe, while the only remaining viable population of the West African giraffe is in Niger.[5] In Niger, herds have been reported from the Agadez Region and across the west and south of the country. Herds regularly traveled into the Gao Region of Mali as well and throughout the Niger River valley of Niger. Drought struck again in the 1980s and 1990s, and in 1991 there were less than 100 in the nation, with the largest herd in the western Dosso Region numbering less than 50 and scattered individuals along the Niger River valley moving from Benin to Mali and clinging on in the W National Park and nearby reserves.[4]

Ecology and behaviour

The West African giraffe survive primarily on a diet of leaves from

Parinari macrophylla, Piliostigma reticulatum, and Balanites aegyptiaca.[4] In the late 1990s, an anti-desertification project for the area around Niamey encouraged the development of woodcutting businesses. An unintended effect of this was the destruction of much tiger bush and giraffe habitat within the region. The Nigerien government has since moved to limit woodcutting in the area.[10]

Conservation

West African giraffes near Kouré, Niger

In the mid-1990s there were only 49 in the whole of

Dosso Partial Faunal Reserve. From there, the largest existing herd migrates seasonally to the drier highlands along the Dallol Bosso valley, as far north as Kouré, some 80 km southeast of Niamey. This area, though under little formal regulation, is the centre for Nigerien and international efforts to maintain habitat, smooth relations between the herd and area farmers, and provide opportunities for tourism, organised by the Association to Safeguard Giraffes in Niger
.

References

  1. ^
    doi:10.2305/IUCN.UK.2018-2.RLTS.T136913A51140803.en
    .
  2. ISBN 9781421400938
    .
  3. ^ a b Niger : la population des girafes augmente de 24% en 2011 (officiel) Archived 5 March 2016 at the Wayback Machine, Xinhua, 2012-03-01.
  4. ^ a b c Galadima, Mariama (16 July 2008). "Le Sanctuaire des Girafes". Centre d'Echange d'Informations sur la Biodiversité du Niger.
  5. ^
    PMID 17434121
    .
  6. ^
    PMID 27618261
    .
  7. PMID 18154651
    .
  8. ^ "Not one but 'six giraffe species'". BBC News (21 December 2007)
  9. ^ "Giraffes and Frogs Provide More Evidence of New Species Hidden in Plain Sight". ScienceDaily (21 December 2007)
  10. ISBN 978-1-84162-152-4
  11. ^ "Northern giraffe: Giraffa camelopardalis". Giraffe Conservation Foundation. 14 March 2019. Retrieved 19 November 2020.
  12. ^ Projet d’étude et de conservation des Girafes du Niger, Association pour la Sauvegarde des Girafes du Niger (2007).
  13. ^ Müller-Jung, Friederike (26 September 2016). "Niger: Giraffes Make an Impressive Comeback in Niger". AllAfrica.com. Retrieved 27 September 2016.

Further reading

  • I. Ciofolo. "West Africa's Last Giraffes: The Conflict between Development and Conservation," Journal of Tropical Ecology, Vol. 11, No. 4 (November 1995), pp. 577–588
  • Yvonnick Le Pendu and Isabelle Ciofolo (1999). Seasonal movements of giraffes in Niger. Journal of Tropical Ecology, 15, pp 341–353

External links

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