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- Tende, Talatu, et al.
(författare)
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Individual Identification and Genetic Variation of Lions (Panthera leo) from Two Protected Areas in Nigeria.
- 2014
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Ingår i: PLoS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 9:1
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Tidskriftsartikel (refereegranskat)abstract
- This survey was conducted in two protected areas in Nigeria to genetically identify individual lions and to determine the genetic variation within and between the populations. We used faecal sample DNA, a non-invasive alternative to the risky and laborious task of taking samples directly from the animals, often preceded by catching and immobilization. Data collection in Yankari Game Reserve (YGR) spanned through a period of five years (2008 -2012), whereas data in Kainji Lake National Park (KLNP) was gathered for a period of three years (2009, 2010 and 2012). We identified a minimum of eight individuals (2 males, 3 females, 3 unknown) from YGR and a minimum of ten individuals (7 males, 3 females) from KLNP. The two populations were found to be genetically distinct as shown by the relatively high fixation index (FST = 0.17) with each population exhibiting signs of inbreeding (YGR FIS = 0.49, KLNP FIS = 0.38). The genetic differentiation between the Yankari and Kainji lions is assumed to result from large spatial geographic distance and physical barriers reducing gene flow between these two remaining wild lion populations in Nigeria. To mitigate the probable inbreeding depression in the lion populations within Nigeria it might be important to transfer lions between parks or reserves or to reintroduce lions from the zoos back to the wild.
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- Tende, Talatu, et al.
(författare)
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Population size of lions in Yankari Game Reserve as revealed by faecal DNA sampling
- 2010
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Ingår i: African Journal of Ecology. - : Wiley. - 1365-2028 .- 0141-6707. ; 48:4, s. 949-952
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Tidskriftsartikel (refereegranskat)abstract
- Studies have shown that lion (Panthera leo) populations in West Africa are small, isolated and fragmented. In Nigeria, lions have disappeared from unprotected areas and are nowadays found only in parks and reserves where these populations may still decline. It is therefore urgent to obtain reliable estimates of population sizes at different localities. Direct observational surveys may either fail to count all individuals or count some individuals repeatedly and are therefore associated with unknown levels of estimation errors. More accurate estimates can be obtained if direct counting is combined with DNA-based individual identification. As lions are difficult to identify individually, presented here is a method that can be a valuable addition to the existing census methods.Resume Des etudes ont montre que les populations de lions Panthera leo d'Afrique de l'Ouest sont petites, isolees et fragmentees. Au Nigeria, les lions ont disparu des zones non protegees et ne se trouvent plus aujourd'hui que dans des parcs et des reserves ou leurs populations peuvent d'ailleurs encore decliner. Il est donc urgent d'avoir des estimations fiables de la taille des populations en differents endroits. Les etudes par observations directes risquent de ne pas reussir a compter tous les individus ou, a l'oppose, d'en compter certains plusieurs fois, et on les associe des lors de niveaux d'erreur d'estimation inconnus. On peut obtenir des estimations plus precises si les comptages directs sont combines avec des identifications individuelles basees sur des analyses d'ADN. Comme les lions sont difficiles a identifier individuellement, voici presentee ici une methode qui peut etre un ajout interessant aux methodes de recensement existantes.
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