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Journal articles on the topic 'Tana River Red colobus'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Marsh, C. W. "Comparative Aspects of Social Organization in the Tana River Red Colobus, Colobus badius rufomitratus." Zeitschrift für Tierpsychologie 51, no. 4 (April 26, 2010): 337–62. http://dx.doi.org/10.1111/j.1439-0310.1979.tb00695.x.

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2

Decker, Barbara Sigman, and Margaret F. Kinnaird. "Tana river red colobus and crested mangabey: Results of recent censuses." American Journal of Primatology 26, no. 1 (1992): 47–52. http://dx.doi.org/10.1002/ajp.1350260108.

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3

Marsh, C. W. "Ranging behaviour and its relation to diet selection in Tana River Red colobus (Colobus badius rufomitratus)." Journal of Zoology 195, no. 4 (August 20, 2009): 473–92. http://dx.doi.org/10.1111/j.1469-7998.1981.tb03479.x.

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4

Mbora, David N. M., and William C. McGrew. "Extra-Group Sexual Consortship in the Tana River Red Colobus (Procolobus rufomitratus) ?" Folia Primatologica 73, no. 4 (2002): 210–13. http://dx.doi.org/10.1159/000065423.

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5

Decker, Barbara Sigman. "Effects of habitat disturbance on the behavioral ecology and demographics of the Tana river red colobus (Colobus badius rufomitratus)." International Journal of Primatology 15, no. 5 (October 1994): 703–37. http://dx.doi.org/10.1007/bf02737428.

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6

Mbora, David N. M., and Elephas Munene. "GASTROINTESTINAL PARASITES OF CRITICALLY ENDANGERED PRIMATES ENDEMIC TO TANA RIVER, KENYA: TANA RIVER RED COLOBUS (PROCOLOBUS RUFOMITRATUS) AND CRESTED MANGABEY (CERCOCEBUS GALERITUS)." Journal of Parasitology 92, no. 5 (October 2006): 928–32. http://dx.doi.org/10.1645/ge-798r1.1.

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7

Mbora, David N. M., and Douglas B. Meikle. "Forest fragmentation and the distribution, abundance and conservation of the Tana river red colobus (Procolobus rufomitratus)." Biological Conservation 118, no. 1 (June 2004): 67–77. http://dx.doi.org/10.1016/j.biocon.2003.07.009.

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8

Mbora, David N. M., and Douglas B. Meikle. "The value of unprotected habitat in conserving the critically endangered Tana River red colobus (Procolobus rufomitratus)." Biological Conservation 120, no. 1 (November 2004): 91–99. http://dx.doi.org/10.1016/j.biocon.2004.02.012.

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9

Mowry, Christopher B., Barbara S. Decker, and Donald J. Shure. "The role of phytochemistry in dietary choices of Tana River red colobus monkeys(Procolobus badius rufomitratus)." International Journal of Primatology 17, no. 1 (February 1996): 63–84. http://dx.doi.org/10.1007/bf02696159.

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10

Mbora, David N. M., and Mark A. McPeek. "Endangered species in small habitat patches can possess high genetic diversity: the case of the Tana River red colobus and mangabey." Conservation Genetics 11, no. 5 (March 10, 2010): 1725–35. http://dx.doi.org/10.1007/s10592-010-0065-0.

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11

Bersacola, Elena, Joana Bessa, Amélia Frazão-Moreira, Dora Biro, Cláudia Sousa, and Kimberley Jane Hockings. "Primate occurrence across a human-impacted landscape in Guinea-Bissau and neighbouring regions in West Africa: using a systematic literature review to highlight the next conservation steps." PeerJ 6 (May 23, 2018): e4847. http://dx.doi.org/10.7717/peerj.4847.

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Background West African landscapes are largely characterised by complex agroforest mosaics. Although the West African forests are considered a nonhuman primate hotspot, knowledge on the distribution of many species is often lacking and out-of-date. Considering the fast-changing nature of the landscapes in this region, up-to-date information on primate occurrence is urgently needed, particularly of taxa such as colobines, which may be more sensitive to habitat modification than others. Understanding wildlife occurrence and mechanisms of persistence in these human-dominated landscapes is fundamental for developing effective conservation strategies. Methods In this paper, we aim to review current knowledge on the distribution of three threatened primates in Guinea-Bissau and neighbouring regions, highlighting research gaps and identifying priority research and conservation action. We conducted a systematic literature review of primate studies from 1976 to 2016 in Guinea-Bissau, southern Senegal and western Guinea (Boké Region). We mapped historical observation records of chimpanzee (Pan troglodytes verus), Temminck’s red colobus (Pilicolobus badius temminckii) and king colobus (Colobus polykomos), including our preliminary survey data from Dulombi, a newly established National Park (NP) in Guinea-Bissau. Results We found 151 documents, including 87 journal articles, that contained field data on primates in this region. In Guinea-Bissau, nearly all studies focussed south of the Corubal River, including mainly Cantanhez, Cufada, and Boé NP’s. In Senegal, most of the data came from Fongoli and Niokolo-Koba NP. In Boké (Guinea) studies are few, with the most recent data coming from Sangarédi. In Dulombi NP we recorded eight primate species, including chimpanzees, red colobus and king colobus. Across the selected region, chimpanzees, red colobus and king colobus were reported in eleven, twelve and seven protected areas, respectively. Discussion Our study demonstrates large geographical research gaps particularly for the two colobines. For the first time after more than two decades, we confirm the presence of red colobus and king colobus north of the Corubal River in Guinea-Bissau. The little information available from large parts of the red colobus range raises questions regarding levels of population fragmentation in this species, particularly in Casamance and across northern Guinea-Bissau. There are still no records demonstrating the occurrence of king colobus in Senegal, and the presence of a viable population in north-eastern Guinea-Bissau remains uncertain. While the occurrence of chimpanzees in Guinea-Bissau and Senegal is well documented, data from Boké (Guinea) are sparse and out-of-date. Our approach—the mapping of data gathered from a systematic literature review—allows us to provide recommendations for selecting future geographical survey locations and planning further research and conservation strategies in this region.

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12

Soiret, Serge Pacome Keagnon, Célestin Yao Kouakou, Béné Jean-Claude Koffi, Blaise Kadjo, Philippe Kouassi, Peñate José Gomez, Reiko Matsuda Goodwin, and Inza Kone. "The diversity and conservation of mammals in the Dodo Coastal Forest in southwestern Côte d’Ivoire, western Africa: a preliminary study." Journal of Threatened Taxa 11, no. 6 (April 26, 2019): 13654–66. http://dx.doi.org/10.11609/jott.4641.11.6.13654-13666.

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To improve the knowledge of non-volant mammal diversity and conservation prospects in the Dodo Coastal Forest (DCF) in southwestern Côte d’Ivoire, we conducted reconnaissance surveys and interviews, and deployed remote cameras. We calculated visual encounter rates (vER) and sign ER (sER) of mammalian taxa and hunting signs, mapped their locations and tested the hypothesis that sightings and signs of primates occurred closer to the river Dodo in and near the gallery forest. We sighted nine taxa, including threatened King Colobus (Endangered, EN), Olive Colobus (Vulnerable, VU), Lowe’s Monkey (VU), the Eastern Lesser Spot-nosed Monkey (VU), and White-bellied Pangolin (VU), with vER of 0.04, 0.12, 0.04, 0.12, 0.04, respectively. We confirmed 14 other taxa with signs including threatened Western Chimpanzee (CR), Pygmy Hippopotamus (Endangered, EN), Bosman’s Potto (VU), and Black-bellied Pangolin (VU), with sER of 0.51, 0.04, 0.08, 0.04, respectively. The most frequently encountered signs were of the Red River Hog at 1.73 signs/km, and the Bushbuck at 0.63 signs/km. Remote cameras captured images of these two taxa at image capture rates (ICR) of 0.044 and 0.022, respectively. Images of the African Buffalo were captured at ICR of 0.044. The 23 confirmed taxa include seven primates, four rodents, three carnivores, six even-toed ungulates, two pangolins and a Tree Hyrax. The mean distance from the river Dodo to the sightings and the signs of the primates was significantly shorter than that of other taxa. This supports our hypothesis. There was a high level of hunting signs (sER = 0.63) indicating that intensive hunting pressure is menacing the fauna. We recommend that authorities take actions against poaching, install a surveillance program, and curtail charcoal-making to ensure the conservation of the threatened mammals of the DCF.

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13

Andanje, Samuel A., Andrew E. Bowkett, Bernard Risky Agwanda, Grace W. Ngaruiya, Amy B. Plowman, Tim Wacher, and Rajan Amin. "A new population of the Critically Endangered Aders’ duiker Cephalophus adersi confirmed from northern coastal Kenya." Oryx 45, no. 3 (July 2011): 444–47. http://dx.doi.org/10.1017/s003060531000181x.

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AbstractAders’ duiker Cephalophus adersi is a small antelope endemic to the coastal forests of east Africa. Threatened by habitat loss and hunting, the species is categorized as Critically Endangered on the IUCN Red List. Until recently Aders’ duiker was known to persist only on Zanzibar, Tanzania, and in the Arabuko-Sokoke Forest National Reserve, Kenya. However, in 2004 a sighting of a single individual was reported from the Dodori forest in northern coastal Kenya, raising the possibility that the species survives elsewhere. Subsequently, an opportunistic camera-trap survey was conducted in September and October 2008 to establish the occurrence of Aders’ duiker in Kenyan coastal forests north of the Tana River. One hundred and fifty six images of Aders’ duikers were obtained from 12 of 28 camera-trap sites (46 of 358 camera-trap days), confirming the existence of a population of Aders’ duiker in the Boni–Dodori forest both inside and outside the National Reserves. In addition, we sighted individuals of the species on three occasions. The relatively high encounter rates per unit effort compared to similar data from Arabuko-Sokoke forest suggest the Boni–Dodori population is significant. Initial surveys of the local Awer community revealed that Aders’ duiker is well known by the name guno. These findings significantly improve the conservation prospects for Aders’ duiker and highlight the need for greater research and management efforts in the poorly known Boni–Dodori forest.

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14

Ngumbau, Veronicah Mutele, Quentin Luke, Mwadime Nyange, Vincent Okelo Wanga, Benjamin Muema Watuma, Yuvenalis Morara Mbuni, Jacinta Ndunge Munyao, et al. "An annotated checklist of the coastal forests of Kenya, East Africa." PhytoKeys 147 (May 12, 2020): 1–191. http://dx.doi.org/10.3897/phytokeys.147.49602.

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The inadequacy of information impedes society’s competence to find out the cause or degree of a problem or even to avoid further losses in an ecosystem. It becomes even harder to identify all the biological resources at risk because there is no exhaustive inventory of either fauna or flora of a particular region. Coastal forests of Kenya are located in the southeast part of Kenya and are distributed mainly in four counties: Kwale, Kilifi, Lamu, and Tana River County. They are a stretch of fragmented forests ca. 30−120 km away from the Indian Ocean, and they have existed for millions of years. Diversity of both fauna and flora is very high in these relicts and the coastal forests of Eastern Africa, extending along the coast from Somalia through Kenya and Tanzania to Mozambique, are ranked among the priority biodiversity hotspot in the world. In spite of the high plant species richness and their importance towards supporting the livelihoods of the communities that live around them, floristic studies in these forests have remained poorly investigated. Hence, based on numerous field investigations, plant lists from published monograph/literature, and data from BRAHMS (Botanical Records and Herbarium Management System) database at East African herbarium (EA), we present a detailed checklist of vascular plants recorded in this region. Our results show that Kenyan coastal forests play an essential role in the flora of Kenya and the plant diversity of the coastal forests of East Africa. The checklist represents 176 families, 981 genera, 2489 species, 100 infraspecific taxa, 90 endemic plants species, 72 exotic species, and 120 species that are included in the current IUCN Red List of Threatened Species as species of major concern. We also discovered three new species to the world from these relicts. Thus, Kenyan coastal forests present a remarkable and significant center of plant diversity.

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15

Sultani, Hadley Matendechero, Collins Okoyo, Henry M. Kanyi, Sammy M. Njenga, Wyckliff P. Omondi, Isabella Ayagah, Morris Buliva, et al. "Mapping of Podoconiosis Cases and Risk Factors in Kenya: A Nationwide Cross-sectional Study." American Journal of Tropical Medicine and Hygiene, August 16, 2021. http://dx.doi.org/10.4269/ajtmh.21-0248.

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Podoconiosis is a type of tropical lymphedema that is clinically distinguished from lymphatic filariasis (LF) because it is ascending and commonly bilateral but asymmetric. The disease is a result of a genetically determined inflammatory reaction to long-term exposure to mineral particles in irritant red clay soils derived mainly from volcanic soils. We conducted the first nationwide mapping of the prevalence and risk factors of podoconiosis in Kenya. We performed a population-based cross-sectional survey to determine the national prevalence of podoconiosis and included 6,228 individuals from 48 villages in 24 sub-counties across 15 counties. Participants answered a questionnaire about the history of symptoms compatible with podoconiosis, received a point-of-care antigen test, and underwent a physical examination if they had lymphedema. A confirmed case of podoconiosis was defined as a case in a resident of the study village who had lower limb bilateral and asymmetric lymphedema lasting more than 1 year, negative test results for Wuchereria bancrofti antigen, and other causes of lymphedema ruled out. Of all the individuals surveyed, 89 had lymphedema; of those, 16 of 6228 (0.3%; 95% confidence interval [CI], 0.1–0.5) were confirmed to have podoconiosis. A high prevalence of podoconiosis was found in western (Siaya, 3.1%; Busia, 0.9%) and central (Meru, 1.1%) regions, and a low prevalence was observed in northern (Marsabit, 0.2%), eastern (Makueni, 0.2%), and coastal (Tana River, 0.1%) regions. The identified risk factors were age 56 years or older (adjusted odds ratio [aOR], 5.66; 95% CI, 2.32–13.83; P < 0.001) and rarely wearing shoes (aOR, 18.92; 95% CI, 4.55–78.71; P < 0.001). These results indicated that the podoconiosis prevalence is low and localized in Kenya; therefore, elimination is achievable if appropriate disease prevention, management, and behavioral strategies are promoted.

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