First Record of Johnston's Genet Genetta Johnstoni in Senegal
Total Page:16
File Type:pdf, Size:1020Kb
First record of Johnston’s Genet Genetta johnstoni in Senegal Liliana Pacheco1, Nerea RUIZ DE Azua1 1, Nacho Aransay1, Ferran Guallar1 and Philippe 2 , José María FERNáNDEZ-GARCÍA Gaubert Abstract Genetta johnstoni is an elusive small carnivore endemic to the Upper Guinean forests. The species was recently assessed as Vulnerable by The IUCN Red List of Threatened Species. Its known occurrence is mostly restricted to the rainforests Johnston’s Genet camera-trap video recorded on April 2011 in Dindefelo Natural Reserve, south-eastern Senegal, about 260 km north of the spe- of Ghana, Côte d’Ivoire, Liberia, Sierra Leone and Guinea. We here present the first sighting of the species in Senegal, through a may inhabit certain forest–savannah mosaics. cies’s westernmost previous known occurrence. Our observation adds further support to the hypothesis that Johnston’s Genet Keywords: Dindefelo, forest–savannah mosaics, Kedougou, Upper Guinean forests, Viverridae Première observation de la Genette de Johnston Genetta johnstoni au Sénégal Résumé Genetta johnstoni de l’espèce a été récemment évalué « Vulnérable » par la Liste Rouge des Espèces Menacées de l’UICN. Son aire de répartition con- La Genette de Johnston est un petit carnivore discret, endémique du Bloc forestier de Haute Guinée. Le statut de la Guinée. Nous présentons ici la première observation de l’espèce au Sénégal, grâce à une capture vidéo enregistrée en Avril 2011nue est dans principalement la Réserve Naturelle restreinte de aux Dindéfélo, forêts tropicales au sud-est humides du Sénégal, du Ghana, à environ de la 260Côte km d’Ivoire, au nord du deLibéria, la plus de proche la Sierra occurrence Leone et préalablement connue de l’espèce. Cette observation renforce l’hypothèse que la Genette de Johnston peut occuper un habitat Motsde type clés « mosaïque forêts–savanes ». : Dindéfélo, forêts de Haute Guinée, Kédougou, mosaïque forêts–savanes, Viverridae Genetta johnstoni Pocock, 1908 is a poorly The video (which can be viewed at http://www.youtube. known small carnivore from West Africa, with a known distri- butionJohnston’s encompassing Genet the Upper Guinean rainforests, including - ston’scom/watch?v=sfN6SUCG-L0&feature=plcp) Genet according to the criteria of Gaubert was etanalysed al. (2008). in et al. (2002) detail, and the individual was positively identified as a John five countries: Ghana, Côte d’Ivoire, Liberia, Sierra Leone and- Guinea (Dunham & Gaubert 2013; Fig. 1). Gaubert moistidentified forests a total west of of24 the specimens so-called in Dahomey museum collectionsGap, also inhabit world- ingwide. swamp Johnston’s and riverine Genet was forests, thought but itsto begeographical restricted to range lowland and ecological niche have been proposed to show a wider spec- trum, possibly including moist woodlands and savannahs from Guinea (Gaubert et al - The IUCN Red List of Threat- ened Species, based on. 2002,its inferred Papeş rate & Gaubert of population 2007). decreaseThe spe (basedcies is classified on forest lossas Vulnerable within its range)on and the plausible impact At 23h15 on 24 April 2011, we video-recorded (15 sec- onds)of bushmeat a slender hunting genet (Dunham drinking &at Gaubert a small 2008).waterhole in Dinde- felo (12°24′N, 12°18′W, altitude 350 m, Google Earth digital elevation model), Kedougou region, south-eastern Senegal. In this location, close to the Guinean border, the Spanish branch 15,000of the Jane ha community-managed Goodall Institute is implementingnatural reserve. a Asresearch part of andthis conservation project with the ultimate goal of proposing a Fig. 1. Western Africa, showing the location of the record of Johnston’s Genet Genetta johnstoni here reported (asterisk), records of the species threeproject, camera-traps an inventory (Scoutguard of mammals SG560) is being have carried been out, operating through compiled by Gaubert et al. (2002) (black dots), and generalised range as both enquiries of villagers and camera-trapping. Hence, a set of delineated by Dunham & Gaubert (2008). in the field on a non-systematic basis. 89 Small Carnivore Conservation , Vol. 48: 89–91, July 2013 Pacheco et al. Fig. 2. Johnston’s Genet Genetta johnstoni, Dindefelo Natural Reserve, south-eastern Senegal, on 24 April 2011. It was a lightly-built genet, with elongated body and face, rela- Fig. 3. Semi-deciduous forest patch where the Johnston’s Genet Genetta tively large eyes, and a long tail (Fig. 2). The estimated head- johnstoni was recorded in Dindefelo Natural Reserve, Senegal. (Photo: body length, deduced from side view, was similar to that of the N. Ruiz de Azua). dark stripe contrasting with the brownish dorsal spots, the tail. Some well-defined characteristics included a mid-dorsal coat and coalescence of dorsal spots at the rump. The tail had remarkable record, not only because it may extend the known eightabsence pale of rings, well-defined their width nuchal being stripes, less than the 20% densely-spotted of that of the rangeThis of this first rare, observation little-known of a Johnston’s species about Genet 260 in Senegal km north is a dark rings (middle of the tail). The tip of the tail, though ill- from its north-westernmost previously known occurrence (Kolenté Plateau, Guinea; Gaubert et al. 2002; Fig. 1), but also and forelimbs were darker than ground coloration. because of the vegetation and ecological features of the study defined,These was features pale but are, mixed overall, with consistent dark hairs. with The thehindlimbs distin- area. Dindefelo Natural Reserve is located at the northern et al. any other West African genet. Following Gaubert et al. (2005, 2004), characterised by a mosaic of semi-deciduous and riv- guishing characteristics of Johnston’s Genet, more than with erineedge ofgallery the Guinean forest forest–savannahpatches and wooded ecoregion savannahs (Burgess (Fig. 3). Genet can be distinguished from the latter by the following fea- tures:2008), other genet species that might co-occur with Johnston’s Genet suggested that rainforest is the species’s typical habi- tat,Although the reassessment most previously of Gaubert accepted et observations al. (2002) also of Johnston’spresented Common or Small-spotted Genet G. genetta: presence of a Gaubert (2007) developed geographically explicit distribution • and lower density of dorsal spots; modelsa record predicting from moist suitability woodland of inthe Guinea. deciduous Besides, forests Papeş in the & Hausamid-dorsal Genet crest, G. thierryi equal :width rufous-brown of pale and dorsal dark line tail-rings, (often split into two longitudinal stripes by a brighter median lies towards the Senegal border in Dindefelo area. Thus, this • observationFouta Djallon at highlands, Dindefelo a supports massif of the which view the of northerna wider distri slope- lower density of dorsal spots; bution and ecological niche for this threatened species. Kingstripe), Genet equal G. poensiswidth of: heavier pale and proportions, dark rings larger of the head, tail, and Acknowledgements • G. bourloni: shorter tail relative to head- bodyfewer length, pale rings well-spotted on the tail forefeet, (4−6); fewer pale rings on the • Bourlon’s Genet The Dindefelo field team included Diba Diallo and Dauda Diallo. The- Pardine Genet G. pardina: heavier body, tail shorter than project ‘Biological inventories in the Dindefelo Natural Reserve’ was head-bodytail (5−7) and length, almost fully completely dark tip of dark the distaltail, fewer half ofpale the rings tail; Wimfunded Wendelen by Wula provided Naafa (USAID) expert and advice. Fundación The comments Biodiversidad by Mark (Span Tay- • lor,ish MinistryVladimir forDinets the Environment).and Emmanuel Javier Do Linh Calzada, San improved Miguel Delibes the draft. and row of dorsal spots. on the tail (6−7), and absence of coalescence in the first References The checklist of small carnivores recorded in the study area is Terrestri- are Common Genet and Burgess,al ecoregions N. D., D’Amico of Africa Hales, and J., Madagascar: Underwood, a E., continental Dinerstein, assessment E., Olson,. still expanding. So far, the other confirmed species of genets- IslandD., Itoua, Press, I., Schipper, Washington J., Ricketts, D.C., U.S.A. T. & Newman, K. 2004. der of which lies about 50Hausa km away Genet from (LP Dindefelo,& NRDA own Common data). Genetta johnstoni. Genet,In the PardineNiokolo−Koba Genet andNational Hausa Park, Genet the have south-eastern all been recorded bor In IUCN Red List of Threatened Species. Version 2011.2. <www. Dunham,iucnredlist.org>. A. E. & Gaubert, Downloaded P. 2008. Johnston's on 12 February Genet 2012. (Sillero-Zubiri & Marino 1997). Small Carnivore Conservation 90 , Vol. 48, July 2013 Johnston’s Genet in Senegal Genetta johnstoni. tinae, Genetta spp. and Poiana spp.) using Xper². Zootaxa 1717: Mammals of 39–50. Dunham,Africa, A. V. & Carnivores, Gaubert, P. pangolins, 2013. Johnston's equids and Genet rhinoceroses - bury,Pp. 230–232 London, inU.K. Kingdon, J. & Hoffmann, M. (eds) number of occurrences: assessment of the conservation status . Blooms Papeş,of M.poorly & Gaubert, known P. viverrids 2007. Modelling (Mammalia, ecological Carnivora) niches across from twolow 2002. A reassessment of the distribution of the rare Genetta continents. Diversity and Distributions Gaubert,johnstoni P., Veron, (Viverridae, G., Colyn, Carnivora) M., Dunham, with A., some Shultz, newly S. & discoveredTranier, M. - specimens. Mammal Review 13: 890−902.Small Carnivore - Sillero-Zubiri,Conservation C. & Marino, J. 1997. The status of small carnivore spe logenetic systematics of the 32:genets 132−144. (Carnivora, Viverridae, Gen- cies in Niokolo−Koba National Park, Senegal. Gaubert,etta P., Taylor, P. & Veron, G. 2005. Integrative taxonomy and phy 1The Jane17: 15−19. Goodall Institute, Dindefelo, Kedougou, Senegal. H. (eds)): a new African classification biodiversity: of the molecules, most speciose organisms, carnivoran ecosystems genus. Email: [email protected] in Africa. Pp. 371−383 in Huber, B. A., Sinclair, B. J. & Lampe, K. 2Muséum National d’Histoire Naturelle, UMR BOREA IRD - 207, 43 rue Cuvier, 75005 Paris, France. cationSpringer, key Bonn, for genets Germany.