Blue Duiker Research Articles

Range Extension and Behavioural Observations of the Flat‐Headed Cusimanse (Crossarchus platycephalus) in Gabon

ABSTRACTThe present work reports on new records of the flat‐headed or Cameroon cusimanse (Crossarchus platycephalus) obtained from camera trap surveys carried out between 2021 and 2023 in central and northwestern Gabon. These records—in the form of high‐definition videos—extend the southern limit of the species' known range by 172 km, as well as provide additional evidence of group living and co‐occurrence with the blue duiker (Philantomba monticola) and moustached guenon (Cercopithecus cephus). These findings suggest that C. platycephalus may be more widespread than previously thought in Gabon, and that a review of existing camera trap datasets could help determine its precise distribution and habitat requirements.

Parks can effectively protect ungulates and elephants despite a constant poaching threat

Establishing protected areas is a key element of most conservation strategies, but continuous effective management is needed to ensure that biodiversity is protected. Here we provide an evaluation of park effectiveness by quantifying changes in the abundance of the commonly occurring ungulates (bushbuck - Tragelaphus scriptus; red duiker - Cephalophus harveyi; blue duiker - Cephalophus moniticola, bushpigs - Potomochoerus larvatus, and giant forest hogs - Hylochoerus meinertzhageni), and African elephants (forest elephants - Loxodonta cyclotis, savanna elephants - Loxodonta africana, and their hybrids) in Kibale National Park, Uganda and consider the financial commitment needed to ensure protection. Following the upgrading of the protection of Kibale from a forest reserve to a national park, wildlife populations generally increased. Bushpigs are an exception and their populations appear stable. The increases of ungulate and elephant populations typically happened soon after park establishment, with the exception of the giant forest hog that only recently showed an increase. We conducted an assessment of Uganda Wildlife Authorities budget and those of the small NGOs working in the area and considered the contribution that Makerere University Biological Field Stations makes to the community. This analysis indicates that with a small budget UWA and its collaborators have been successful in protecting the park’s ungulate and elephant populations. While the past decades have demonstrated the park’s ability to conserve biodiversity with limited resources, the changing climate and mounting pressures faced by the park will necessitate significantly increased investments.

First records of leucism in two species of duiker (Cephalophinae) in Gabon

The present study aimed to describe partial leucism, which is a pigmentation disorder, in two duiker species: Philantomba monticola and Sylvicapra grimmia. Leucism is a condition characterized by partial loss of pigmentation, resulting in white or pale patches on the animal's body. This is the first report of leucism in the subfamily Cephalophinae, which includes duikers, and similar occurrences may exist in other duiker species across their sub-Saharan distribution range. This finding highlights the potential for further research on pigmentation disorders in duikers and their prevalence in different species within the subfamily.

Status of terrestrial mammals in the Yangambi Landscape, Democratic Republic of the Congo

AbstractIn this study we provide the first comprehensive camera-trap assessment of terrestrial mammals in the Yangambi landscape, comprising the Yangambi Biosphere Reserve and a logging concession in the Democratic Republic of the Congo. The terrestrial mammal community in this area exhibits lower occupancy and species richness compared to other conservation areas in the Congo Basin. The community is dominated by four species: Emin's pouched rat Cricetomys emini (1.3 kg), African brush-tailed porcupine Atherurus africanus (2.8 kg), blue duiker Philantomba monticola (5 kg) and bay duiker Cephalophus dorsalis (12 kg), which are known to be highly resilient. Large ungulates and medium-sized carnivores have particularly low abundances. Our study also confirmed the presence of four species categorized as threatened on the IUCN Red List: the chimpanzee Pan troglodytes, giant ground pangolin Smutsia gigantea, black-bellied pangolin Phataginus tetradactyla and white-bellied pangolin Phataginus tricuspis. Our findings highlight the need to consider wildlife conservation at the landscape level, including the logging concession, where species showed higher occupancy levels compared to the Biosphere Reserve, and highlighting the need for planning infrastructure construction and developing mitigation schemes, reducing forest degradation from logging and developing permanent cash crop agriculture. Landscape-level conservation will only be possible if a collaborative management model steered by local communities is developed with the participation of all constituencies.

Effects of land cover changes and forest fragmentation on three species of east African mini‐antelopes

AbstractHuman beings have continued to decline and fragment mini‐antelopes habitats. We studied the effects of land cover change on the conservation of the endangered Ader's Duiker (Cephalophus adersi), the Zanzibar blue duiker (Cephalophus monticola sundevalli) and the Suni (Neotragus moschatus zanzibaricus) in Zanzibar, Tanzania. Data were obtained from the 1975, 2009 and 2014 satellite images and geographical information systems, focus group discussions, transect‐walk and observation. We found that the habitat of mini‐antelopes had declined from 87.3% to 58.5% between 1975 and 2014 and become fragmented. The forest fragments increased from 35 to 139 patches while shrubs increased from 41 to 199 patches. Community members had the perception that the decline and fragmentation of the habitat had caused the numbers of mini‐antelopes and their forage to decline. We also found that there were incidences of mini‐antelopes eating crop plants such as cowpeas, yams and tomatoes in the farms during the night as an adaptive mechanism for forage decline. Conclusively, land cover changes from human activities have caused negative effects on the mini‐antelopes. There is, therefore need for the local people, the government and private individuals or corporations to introduce collective conservation initiatives, including the establishment of conservation areas to conserve the mini‐antelopes.

Overlap of activity patterns between leopards and their potential prey species in Mahale Mountains National Park, Tanzania

AbstractThe activities of predators and prey have been reported to influence each other. However, few studies have clarified when African leopards Panthera pardus are likely to encounter their prey. One reason for this is that the activity patterns of African forest mammals are poorly understood. Therefore, I aimed to clarify the activity patterns of leopards and their prey species by deploying camera traps on the ground and in trees in Mahale Mountains National Park, Tanzania. In total, 4468 camera days of camera traps set on the ground and 286 camera days of camera traps set in trees were analyzed. The overlap in activity patterns between leopards and their main prey species was calculated using coefficient Δ. At least seven leopards were identified in the study area. Leopards were active throughout the day, with crepuscular peaks at dawn and dusk. Blue duikers Philantomba monticola, the most consumed species in Mahale, were predominantly diurnal. The activity patterns of leopards moderately overlapped with those of blue duikers (Δ = 0.65). The activity patterns of leopards showed a moderate (Δ = 0.61) or low (Δ = 0.42) overlap with those of red‐tailed monkeys Cercopithecus ascanius when detections were captured by arboreal or terrestrial cameras, respectively. Mahale leopards may hunt blue duikers and arboreal primates in the midday on the ground, and may also attack primates in roost trees at night. Future studies on the leopard diet in various study areas, as well as comparisons of activity patterns between leopards and other animals, will elucidate leopard ecology.

Predicting bushmeat biomass from species composition captured by camera traps: Implications for locally based wildlife monitoring

Abstract Facing the bushmeat crisis, tropical forests require effective monitoring for sustainable wildlife management. To gain credibility with local people and conservation officials, the monitoring needs indicators that comply with local knowledge and predict the available faunal resources. This study explores predictive indicators for bushmeat biomass—the total biomass of five main hunted mammals—in a Cameroonian rainforest. We employed camera trapping and the Random Encounter and Staying Time (REST) model to estimate the spatial variation in each species' population density and bushmeat biomass at three sites. We then calculated six indicators from camera‐trap capture rate estimates and assessed their predictive performance for the total wild meat amount. Duikers generally increased with distance from the public road, but two red duiker species were more markedly affected by the distance than blue duikers. Spatial density patterns of brush‐tailed porcupines and Emin's pouched rats differed between sites. Consequently, bushmeat biomass displayed exponential growth away from the road with varying degrees among the sites. Of the six indicators, the R/B ratio (red‐to‐blue duiker ratio) and the D/R ratio (duiker‐to‐rodent ratio) exhibited positive linear‐like correlations to bushmeat biomass at all sites. The correlation lines were moderately similar across sites in the R/B ratio but largely different in the D/R ratio, suggesting that the latter is unsuitable for sharing information between neighbouring communities. Synthesis and applications. The two indicators based on captured animal composition may effectively predict the total biomass of the main target species for bushmeat hunting, given a reasonably large sample size. The R/B ratio (red duikers/blue duikers) is recommended as a first choice; the D/R ratio (duikers/rodents) can be a good alternative when information sharing is not essential. Because local hunters are aware of depletion‐related changes in species composition of caught animals, these indices may be effectively incorporated into community‐based wildlife monitoring.

Genetic patterns in three South African specialist antelope species: Threats, conservation management and their implications

AbstractGenetic diversity is a fundamental measure of a populations ability to adapt to future environmental change. Subpopulations may carry unique genetic lineages that contribute to fitness and genetic diversity of species across their distribution range. Therefore, considerations, or lack thereof, of genetic diversity in wildlife management practices may result in either population persistence or extinction over time. Some management tools may pose a greater risk to a species' survival than others when populations are impacted. In South Africa, there has been great interest to translocate animals, sometimes with little consideration to the potential impacts on the species and/or populations survival. Thus, there is a need to collate scientific information to better inform decision‐making and review these management practices and their effects on populations. Here, we focus on three antelope species, the blue duiker (Philantomba monticola), oribi (Ourebia ourebi), and tsessebe (Damaliscus lunatus). We review the genetic status of each species across South Africa, with regards to taxonomy, genetic diversity and population structure, threats that may compromise the genetic diversity within species and across populations, conservation management actions and how they may compromise or benefit the genetic status and lastly make recommendations on possible alternative management actions and future research to inform conservation policy and sustainable management practice.

The drivers of wild meat consumption in rural Cameroon: Insights for wild meat alternative project design

AbstractProjects providing alternative foods to wild meat in rural areas are commonplace across West and Central Africa to try and curb unsustainable hunting, regarded as a major concern for conservation and local food security. However, there lacks locally specific research on the preferences and drivers of wild meat consumption in rural areas—essential information for guiding such interventions. We carry out semi‐structured interviews with 542 people in four rural villages around the Dja Faunal Reserve in Cameroon, to understand the importance of wild meat, explore people's food choices, identify the drivers of wild meat consumption, and explore variation in the drivers and barriers to eating wild meat and its alternatives. We found that wild meat is preferred to meat from domestic livestock or wild caught fish. Many of the most commonly preferred wild meat species (porcupine and blue duiker) are relatively abundant, with the exception of pangolin which is globally endangered but which people reportedly prefer because of its good taste. Good taste, perceived health benefits, and easy accessibility are the key drivers of consumption, while taboos, an off‐putting appearance, and health concerns play a strong role in species avoidance, particularly for great apes and large ungulates. Village‐level differences in the drivers of consumption were observed, possibly influenced by their proximity to the reserve, to markets, participation in alternatives projects, and to law enforcement. That people in rural Cameroon care about health and taste in their choices, rather than simply availability or cost, challenges the assumptions that underpin many alternative meat projects. Our findings provide an understanding of consumer drivers to help to guide wild meat alternative interventions in rural areas. We urge wild meat alternatives designers to account for the heterogeneity of preferences and drivers within communities, to help ensure that projects reach both their conservation and social objectives.

Rapid dung removal by beetles suggests higher duiker densities in Central African rainforests

AbstractFor many mammal species, converting dung density into population density requires accurate estimates of defaecation rate and dung survival time. The latter parameter probably varies seasonally. In Nki National Park, south-east Cameroon, we monitored 216 dung piles of the blue duiker Philantomba monticola and 373 of the red duiker group (Cephalophus spp.), major game animals in Central Africa, and estimated dung survival time across seasons. Mean survival time was 6.83 days in the major dry season and 1.21–1.81 in other seasons for the blue duiker, and 7.37 and 1.53–4.05 for red duikers, lower than the values conventionally used for density estimations in Central Africa (i.e. 18 days for the blue duiker and 21 days for red duikers). Overall, beetles removed half of the dung within 1 day of deposition. However, the proportion of dung piles that beetles removed was significantly lower in the major dry season, and other dung piles remained longer until they disappeared as a result of other factors. As shorter dung survival time results in higher estimates of population density, our findings imply that in forests with intense beetle activity, duiker densities are higher than those based on the conventional values of dung survival time. Duiker densities and dung survival time should be estimated simultaneously. To minimize the bias introduced by rapid removal of fresh dung by beetles, only fresh dung (< 3 hours old) should be monitored when estimating mean dung survival time.

Golden-bellied mangabeys (Cercocebus chrysogaster) consume and share mammalian prey at LuiKotale, Democratic Republic of the Congo

AbstractPredator–prey dynamics are an important aspect of community ecology, but predation events are often difficult to observe. Among African primates, observations of mammal predation are particularly uncommon and generally restricted to a few ape and cercopithecoid species. I report five observations of mammal predation by golden-bellied mangabeys (Cercocebus chrysogaster) living in rainforest at the LuiKotale study site, Democratic Republic of the Congo. Over 46 all-day follows, mangabeys from one group caught and consumed four duikers (Cephalophinae spp.) and one Alexander’s cusimanse (Crossarchus alexandri). Individuals begged from the feeding individual in three of five observations. I observed one successful attempt at begging, which resulted in an adult female tolerating removal of blue duiker by a juvenile. These are the first detailed observations of mammal predation and food sharing by Cercocebus mangabeys and suggest mammals that feed alongside mangabeys may balance predation risk against social foraging benefits. Food sharing is rarely observed in most cercopithecine monkeys and could provide a useful metric to examine socio-ecological patterns of food acquisition.

Diversity of gastrointestinal parasites in sympatric mammals in Moukalaba-Doudou National Park, Gabon.

Background and Aim:Gastrointestinal parasites identified in the wild can negatively affect host fitness, lower performance, and growth. On the other side, sympatric mammals that share habitat and resources may also cross-transmit parasites, which are often zoonotic and can contribute to morbidity and mortality. This study aimed to characterize the diversity of gastrointestinal parasites circulating in mammalian hosts in Moukalaba-Doudou National Park.Materials and Methods:We screened a total of 25 fecal samples collected from nine wild mammalian species, namely, western gorilla (Gorilla gorilla gorilla), chimpanzee (Pan troglodytes), putty-nosed monkey (Cercopithecus nictitans), African forest elephant (Loxodonta cyclotis), African buffalo (Syncerus caffer), blue duiker (Philantomba monticola), bay duiker (Cephalophus dorsalis), and red river hog (Potamochoerus porcus) as well as people working as trackers (Homo sapiens) using direct microscopic observations following a sedimentation technique to concentrate the fecal material.Results:Of the total 25 fecal samples screened, 15 (60%) were positive for parasitic gastrointestinal infection. Based on the morphology of parasite eggs and cysts, we identified a rich diversity of nematodes, protozoans, trematodes, and cestodes, including unidentified strongyles (73%), Oesophagostomum spp. (53%), Ancylostoma spp. (27%), Trichuris spp. (13%), Ascaris spp. (13%), Mammomonogamus spp. (13%), Strongyloides spp. (47%), Balantidium coli (20%), Entamoeba coli (20%), Endolimax nana (6%), Fasciola hepatica (6%), Paramphistomum spp. (13%), and Taenia spp. (6%).Conclusion:All parasites were found at least once in one of the hosts, and most were potentially zoonotic and responsible for several diseases of public health concern. Because of the small sample size, our findings should not be considered conclusive. Nevertheless, they highlight the diversity of gastrointestinal parasites in this area.

Mammal distribution and trends in the threatened Ebo 'intact forest landscape', Cameroon

Intact forest landscapes (IFLs) are globally important for maintaining functional ecosystems. Ebo forest (~1400 km2) in Cameroon is one of the largest remaining IFLs in the Cross-Sanaga-Bioko coastal forest ecoregion and harbours several IUCN Red-Listed threatened mammal species. We evaluated the status, trends, and distribution of mammals ≥ 0.5 kg in the Ebo forest over 12 years using guided recce and camera trap monitoring surveys, as well as local knowledge to inform future land use and conservation planning. Recce monitoring of six taxa (blue duiker Philantomba monticola, chimpanzee Pan troglodytes, forest elephant Loxodonta cyclotis, putty-nosed monkey Cercopithecus nictitans, medium sized duikers Cephalophus spp., and red river hog Potamochoerus porcus) showed that some are stable or increasing. Indeed, our recent camera trap data confirmed breeding Gorilla gorilla (western gorilla) and elephant. Distribution models for chimpanzees and elephants showed that their populations are concentrated in the centre of the forest, away from human pressure. Some other species, however, including red colobus Piliocolobus preussi, leopard Panthera pardus, African golden cat Caracal aurata, and forest buffalo Syncerus caffer nanus are either close to extirpation or have been extirpated within living memory. We conclude that the Ebo intact forest landscape retains an important mammal community, despite no formal legal protection. Ebo’s future is uncertain, with two commercial logging concessions announced by Cameroon in 2020 and later suspended in response to national and international pressure. It is crucial to maintain Ebo’s integrity to protect the biodiversity and function of this important part of the Cross-Sanaga-Bioko coastal forest ecoregion.

High abundance and large proportion of medium and large duikers in an intact and unhunted afrotropical protected area: Insights into monitoring methods

AbstractUnsustainable hunting of bushmeat has dramatic impacts on ecological processes and people's livelihoods. Unfortunately, there is often a strong controversy regarding the sustainability of duiker hunting due to their continued presence in bushmeat markets, on the one hand, and the predictions of sustainable harvest models for duiker abundance, on the other. This apparent contradiction is largely due to biased low abundance estimates from dung surveys. We present results from a 52.4 km line transect dung survey using site decay rates to estimate duiker densities. In addition, camera trapping (14,995 camera trap‐days) was used to provide detection rates and a baseline for the ratio of blue to red duikers as an index of hunting pressure from Nouabalé‐Ndoki National Park, with almost zero levels of hunting. Dung surveys revealed high overall duiker densities (totalling 107.4 duikers per km2) and quick dung decay rate. Camera trapping revealed high‐duiker detection rates and a high ratio of red to blue duikers. Pristine protected areas and no‐hunting zones continue to act as source habitats for high recruitment of harvested species. We discuss future options for monitoring duikers and applying the ratio of red to blue duikers as an index of the level of duiker hunting.

Distance sampling of duikers in the rainforest: Dealing with transect avoidance.

Bushmeat is a major source of protein and income in tropical regions but is often over-harvested. A better monitoring of bushmeat stocks could help achieve sustainability. We used a combination of simulations and transect survey data collected from blue duikers (Philantomba monticola) in the Lomako wildlife reserve, Democratic Republic of the Congo, to investigate the use of transect-based distance sampling to monitor bushmeat stocks. The comparison of dung piles and direct observations of duikers evidenced that animals avoided both the transects in the absence of observers, and the observers themselves. This type of behavioural response appeared common in a literature survey. It causes a negative bias in the estimates of population densities from the standard distance sampling methodology. This negative bias would lead to over-pessimistic predictions of population viability, especially if the behavioural response is more intense in the locations where the animals are hunted. In turn, this would lead to excessively conservative management recommendations. To correct for the effect of the behavioural response of the animals to either the transects or the observers, we recommend recording both the forward and perpendicular distances to the observers (2D distance sampling), not just the perpendicular distance. We also recommend multiple-observer protocols. As a cautionary note, we also demonstrate a scenario where the intensity of the behavioural response is too high to reliably estimate the abundance of the population. As a perspective, we outline the general principles of a local stakeholder-based program combining distance sampling with less intensive types of ecological indicators to monitor wildlife populations.

Multivariate analysis of cranial measurements of Cameroon’s Blue Duiker (Cephalophusmonticola Thunberg, 1789)

The blue duiker (Cephalophusmonticola)isexclusively an African wild bovidae. It is a principal source of protein in the African forest zones and contributes in the nutrition of local populations. Fifteen cranial measurements on 60 skulls using the opportunist’s method as from January 2018 to December2018. Descriptive statistic and multivariate analysis were done using SPSS version 21.0software and XLSTAT-Pro version 7.5.2 software. It reveals that, there exist a significant difference between males and females skull (p>0.05): total length of skull 114.32 ± .81 and 121.71 ± 1.77; Palate maximal width 35.24 ± .75 and 44.96 ± 14.80; postorbital apophyses width 23.34 ± 1.11and 36.26 ± 1.79; Palatine length 55.31 ± 1.16 and 66.52 ± 1.86; condyle basal length 96.53 ± 1.26 and 105.43 ± 3.05 for the males and females respectively. We have a high positive correlation between the jugal teeth line length and the total skull length (0.973); between palatine length and the total skull length (0.990) and, between condyle basal length and the total skull length (0.993). The principal component analysis (PCA) enable us to see the level of genetics variabilities of blue duiker through skull measurements. These variables measurement are close together from one to another where there is a high similarity between species. Despite these similarities, the population structure of blue duiker shows three sub-species of blue duiker C1, C2 and C3 found respectively in the agro ecological zones of the Western highlands, Mono-modal humid forest and Bimodal humid forest. These three sub-species varies genetically.

Factors affecting the occupancy of forest mammals in an urban-forest mosaic in EThekwini Municipality, Durban, South Africa

Urbanisation is one of the most rapidly expanding forms of landscape modification by humans and leads to large-scale loss and fragmentation of native habitat. This can alter the structure, composition and function of remnant habitat. Therefore, understanding the influence of both landscape and patch characteristics is important for understanding factors affecting the distribution of organisms in urbanised landscapes. Consequently, the aim of this study was to establish the responses of forest dwelling mammals to landscape and habitat structure in an urban-forest mosaic in the EThekwini Municipality Area, Durban, South Africa. Using presence and absence data of mammals from camera traps, we modelled occupancy of species using the occupancy modelling framework. The occupancy by Philantomba monticola was positively influenced by forest cover (%), woody cover (%), leaf litter (%) and stem density of large trees and negatively influenced by road density. For Tragelaphus sylvaticus, Potamochoerus larvatus and Hystix africaeaustralis, occupancy was influenced positively by forest cover (%), woody cover (%) and foliage height diversity and negatively influenced by road density. For Genetta tigrina and Chlorocebus pygerythrus, occupancy was positively influenced by leaf litter (%), woody cover (%), forest cover (%) and road density and negatively influenced by distance to road. Thus, species showed varying responses to landscape and habitat structural variables. Genetta tigrina and C. pygerythrus appeared less vulnerable to the loss of forest habitat and degradation in habitat quality whereas T. sylvaticus, P. larvatus and H. africaeaustralis showed strong negative responses to such changes. The semi-arboreal habits of G. tigrina and C. pygerythrus may be an important factor facilitating their adaptability to urban environments as they can move unimpededly across the urban landscape in search of resources. The diversity of responses suggests that landscape management approaches that consider the habitat requirements of multiple species are more likely to be successful in this landscape. We suggest that conservation efforts directed primarily towards the protection and restoration of structurally intact forest habitats is the most prudent strategy for the conservation of mammalian diversity in this landscape.

Primates are an important food resource for leopards (Panthera pardus) in Mahale, Tanzania

AbstractLeopard diets in the Kasoje area of the Mahale Mountains National Park, Tanzania, were analysed by inspecting prey remains in 256 scats. This area is unique as leopard density is high despite a relatively low density of medium‐sized ungulates, regarded as the most preferred prey of leopards. At least eleven prey mammal species were confirmed in the scats. Small prey mammals up to 10 kg comprised 91.4% of the relative biomass consumed; the mean prey biomass in each scat was 7.6 kg. Blue duiker (31.2%) was the most dominant prey species, followed by the red colobus (29.2%), semi‐terrestrial Cercopithecinae (the vervet monkey and yellow baboon combined) (10.5%) and the red‐tailed monkey (9.9%). At the order level, the most consumed prey taxon was Primates (53.8%), followed by Cetartiodactyla (39.6%) and Rodentia (5.8%). Among primates, the blue monkey was the most preferred prey species, followed by the red colobus and semi‐terrestrial Cercopithecinae. High consumption of primates is a unique characteristic of the leopards in Mahale. This trend exemplifies the flexibility of leopards in their choices of prey, and such flexibility may be one of the underlying reasons for leopards exhibiting the broadest global distribution among all wild felid species.

Maximising camera trap data: Using attractants to improve detection of elusive species in multi-species surveys.

Camera traps are a key tool in ecological studies, and are increasingly being used to understand entire communities. However, robust inferences continue to be hampered by low detection of rare and elusive species. Attractants can be used to increase detection rates, but may also alter behaviour, and little research has evaluated short-term, localized response to the presence of attractants. We conducted three camera trap surveys in Kibale National Park, Uganda, using food baits and scent lures (“attractants”) at each camera station to entice small carnivores to pass in front of camera stations. To examine the interrelationship between scavenging and response to attractants, we also placed camera traps at five food refuse pits. We modelled the effect of attractant and duration of trap placement on the detection probability of small carnivores and selected African golden cat Caracal aurata prey items. We examine transient site response of each species, by comparing our observed likelihood of detection in each 24 h period from 1–7 d following refreshing of attractants to randomly generated capture histories. African civet Civettictis civetta, rusty-spotted genet Genetta maculata, African palm civet Nandinia binotata, and marsh mongoose Atilax paludinosus detection probabilities were highest and Weyns’s red duiker Cephalophus wenysi detection probability was lowest immediately after attractants were placed. Within 24 h after attractant was placed, rusty-spotted genet and African palm civet were more likely to be detected and African golden cat, red duiker, and blue duiker Philantomba monticola were less likely to be detected. Our results suggest that attractants can increase detection of small-bodied species and include some arboreal species in terrestrial camera trap sampling. However, attractants may also alter short-term visitation rates of some species, with potentially cascading effects on others. Community level and intraguild interaction studies should control for the potentially confounding effects of attractants on spatial activity patterns.

English

Study on the poaching and bushmeat off takes /harvest in the Ebo Forest Reserve was carried out in 2012 and 2016 to identify and quantify species poached, poaching methods and seasonal impact on harvest rates and quantity. To achieve this task, purposeful and random sampling methods were used for the selection of respondents for questionnaires administration. In all, 182 from a population of about 461 poachers were sampled for questionnaires administration. Besides the administration of questionnaires, some selected Participatory Rural Appraisal (PRA) tools were also employed for the triangulation of collected data. Biological data were collected using four transects each 1.8 m wide by 2 km long laid 200 m apart in each of the zones. Along each of the established transects 20 m on both sides, data on encounter rates and human presence was collected. A total of 3768 animals with biomass of 26039.5 kg was harvested from the Ebo Forest Reserve and associated forests areas by 461 poachers. The harvest was made up of 30 species from 17 families of wildlife dominated by blue duikers (19.59%), brush- tailed (18.10%) and red duikers (11.36%).Two main weapons, guns and wire snares were identified as the main poaching weapons in the EFR. Harvest was more in the wet season than in the dry season. Poaching was more intense in zones that were very accessible and close to the market centre of Douala. As income gain remained a driving force to poaching, there is need to check poaching activities in the study area against the present weekly off take rate of 2.87 animals per day. Key words: Bushmeat, off take, poaching, harvest, species.