Biodiversity and conservation of the reptiles of the mount Cameroon area

Gonwouo, Nono L.; LeBreton, Matthew; Chirio, Laurent; Ineich, Ivan; Tchamba, N. M.; Ngassam, Pierre; Dzikouk, G; Diffo, Joseph Le Doux

doi:10.1080/21564574.2007.9635560

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…); reptiles, e.g ., Varanus ornatus , Lamprophis virgatus (Gonwouo et al . ); and bird species with high abundances whose diet comprise larger invertebrates and small vertebrates, e.g ., Lanarius spp. (Djomo et al .…”

Section: Discussionmentioning

confidence: 99%

“…Small and medium-sized predators of these three categories that can be found on Mt. Cameroon include rodents, e.g., Hybomys badius, Myosciurus pumilio, Cricetomys gambianus, Atherurus africanus (Bobo & Waltert 2011, Kingdon et al 2013; reptiles, e.g., Varanus ornatus, Lamprophis virgatus (Gonwouo et al 2007); and bird species with high abundances whose diet comprise larger invertebrates and small vertebrates, e.g., Lanarius spp. (Djomo et al 2014b).…”

Section: Discussionmentioning

confidence: 99%

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Relationship between Survival Rate of Avian Artificial Nests and Forest Vegetation Structure along a Tropical Altitudinal Gradient on Mount Cameroon

et al. 2015

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Nest predation is assumed to be an important factor driving avian life histories. Altitudinal gradients offer valuable study systems to investigate how avian nest predation risk varies between bird populations. In this study, a hypothesis postulating an increase in avian nest survival rate with elevation as a result of decreasing predation pressure was experimentally tested along an altitudinal gradient (300-2250 m) in West-Central Africa. Three types of artificial nests (cup-shrub, cup-ground and bare-ground) were used along the altitudinal gradient. Overall, elevation had no effect on the daily survival rate (DSR) of the artificial nests. However, there was a significant elevation-nest type interaction. Daily survival rate for cup-shrub nests decreased significantly with elevation, but for cup-ground and bareground nests, elevation had no significant effect. We tested the effects of the same vegetation parameters (tree density, herb and shrub layer coverage, and canopy openness) on the DSR of different nest types to understand how different vegetation layers or combinations of them affect DSR. Daily survival rate for bare-ground nests significantly decreased with increasing canopy openness, and was positively influenced by coverage of herb layer and tree density. For cup-shrub nests, DSR increased significantly with increasing shrub layer coverage. Finally, for cup-ground nests, we found a positive effect of shrub coverage and canopy openness on DSR. In summary, we found that different forest vegetation layers affect predation risk of different nest types along elevations on Mt. Cameroon.Abstract in French is available with online material.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Relationship between Survival Rate of Avian Artificial Nests and Forest Vegetation Structure along a Tropical Altitudinal Gradient on Mount Cameroon

et al. 2015

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“…Our study is a part of a larger project in Cameroon to identify the main events that have structured the biodiversity and to provide evidence for explanatory theories such as species refugia, or species pump. 13 chameleon species/subspecies, with six endemic taxa, are recorded in the Cameroon volcanic chain, and they often have distinct, restricted geographical ranges (Gonwouo et al, 2006(Gonwouo et al, , 2007. We described the first two new Rhabdias species from west equatorial Africa, from two Trioceros species captured on two distant Cameroun mounts.…”

Section: R Habdiasmentioning

confidence: 99%

First report ofRhabdias(Nematoda: Rhabdiasoidea) from lungs of montane chameleons in Cameroon: description of two new species and notes on biology

et al. 2008

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Summary :The lung nematodes of the genus Rhabdias parasitic in chameleons were previously only known from east Africa and Madagascar. Two new species are described from Cameroon: i) Rhabdias okuensis n. sp., type-host Chamaeleo (Trioceros) quadricornis gracilior, from Mont Oku, is frequent; it resembles R. jarki from Burundi, with a short buccal capsule and a long, thin oesophagus, and is distinguished by its large cervical vesicle and cephalic characters (mouth aperture, papillae). The female parasites are hermaphroditic (spermatozoa identified) and they pierce the lung wall and induce lesions, as R. jarki. In the same locality, another chameleon, C. (T.) w. wiedersheimi also harbours R. okuensis, as demonstrated with the 12S rDNA and coxI gene sequences. ii) R. cristati n. sp., type-host C. (T.) cristatus, from Mount Cameroon, is described from one heavily infected specimen; it resembles R. chamaeleonis from East Africa, and is distinguished by the large buccal capsule and the thick apex of the intestine. The free-living phase, studied in R. okuensis, presents characters of other Rhabdias from chameleons: heterogony, development of larvae through matricidal endotoky, infective larval stages with a thick, rounded caudal extremity, exuvium transformed into a thick cuticular sheeth. Each free-living female produces one larva, as in other African Rhabdias, whereas the female of R. gemellipara, a parasite of a Malagasy chameleon, produces two larvae. Résumé

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“…Atractaspis reticulata heterochilus was likewise reported from Cameroon: Sud-West Province: Nyasoso (photographic record in Dobiey and Vogel 2007); Mount Cameroon area (Gonwouo et al 2007); Sud Province: "Ngam" [= Ngan] (Perret and Mertens 1957: SMF 52361); Bitye (Laurent 1950, but 21 midbody scale rows); Campo Reserve (Ota et al 1987: KUZ R8330); Central African Republic: Lobaye Province: Boukoko, (Roux-Estève 1965: MNHN 1963.899, MNHN 1964; Equatorial Guinea: Cen-tro-Sur Province: Monte Alén, (Lasso et al 2002); Gabon: Ogooué-Maritime Province: Yenzi, Gamba, Ndougou Department (Pauwels and Sallé 2009: USNM 565138); Ogooué-Ivindo Province: Makokou (Knoepffler 1966: MBG 0644); Estuaire Province: "Gabun" [= probably Gabon estuary] (Werner 1913: ZMH R11275); Democratic Republic of the Congo: Tshopo Province: "Stanleyville" [= Kisangani] (Laurent 1945: RGMC 6614, 8003, 8252); Tanganyika Province: "Albertville" [= Kalemie] (Boulenger 1901: RGMC 608, type locality); Ituri Province: "Makele" [= Makala, according to Christy 1915], (Boulenger 1919;Laurent 1945: RGMC 1686; Irumu (de Witte 1953); North Kivu Province: "N'Goma" [= Goma], (Schouteden 1933;de Witte 1941: RGMC 4068); "Kartoushi" [= near Oicha, according to map in Gyldenstolpe 1924] (de Witte 1941); Mai-Ndombe Province: "Ndwa" [= Bolobo, according to Chapin 1954] (Laurent 1956a: RGMC 16214); "Kunungu" [= Bolobo, according to Chapin 1954] (Laurent 1945: RGMC 8764, 8767); Kwango Province: "Imbela" [= Kimbele] (GBIF: RBINS 12278); Angola: Cuanza Norte Province: Piri Dembos (Hellmich 1957: ZSM 111/1954. The Angolan record of Hellmich (1957) was doubted by Branch (2018).…”

Section: Distribution Of Atractaspis Reticulata Subspeciesmentioning

confidence: 62%

“…Data for altitudinal range are given for Cameroon: 0-1800 m a.s.l. (Herrmann et al 2005;Chirio and LeBreton 2007;Gonwouo et al 2007), and Gabon: 0-500 m a.s.l. (Pauwels and Vande weghe 2008).…”

Section: Distribution Of Atractaspis Reticulata Subspeciesmentioning

confidence: 99%

A new stiletto snake (Lamprophiidae, Atractaspidinae, Atractaspis) from Liberia and Guinea, West Africa

Rödel¹,

Kucharzewski²,

Mahlow³

et al. 2019

ZSE

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We describe a new stiletto snake,Atractaspis, from western Liberia and southeastern Guinea. The new species shares with morphologically similar western AfricanAtractaspisspecies,A.reticulataandA.corpulenta, the fusion of the 2ndinfralabial with the inframaxillary. FromA.corpulentathe new species differs by a more slender body (276–288 ventrals and 19 or 20 dorsal scale rows versus 178–208 ventrals with 23–29 dorsal scale rows), a divided anal plate and divided subcaudal scales (both non-divided inA.corpulenta). The new species differs from mostA.reticulataby having 19 or 20 dorsal scale rows at midbody (versus 21–23, rarely 19), and a lower ventral count (276–288 versus 304–370). The new species thus has a relatively longer tail: snout-vent-length / tail-length in the female holotype (15.7) and paratype (21.5) versus a mean of 23.6 in seven femaleA.reticulata. The newAtractaspislikely is endemic to the western part of the Upper Guinea forest zone and thus adds to the uniqueness of this diverse and threatened biogeographic region.

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Biodiversity and conservation of the reptiles of the mount Cameroon area

Cited by 6 publications

References 10 publications

Relationship between Survival Rate of Avian Artificial Nests and Forest Vegetation Structure along a Tropical Altitudinal Gradient on Mount Cameroon

Relationship between Survival Rate of Avian Artificial Nests and Forest Vegetation Structure along a Tropical Altitudinal Gradient on Mount Cameroon

First report ofRhabdias(Nematoda: Rhabdiasoidea) from lungs of montane chameleons in Cameroon: description of two new species and notes on biology

A new stiletto snake (Lamprophiidae, Atractaspidinae, Atractaspis) from Liberia and Guinea, West Africa

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