학술논문
Population Abundance and Density Estimates of Poorly Documented Near-Threatened Calabar Angwantibo ( Arctocebus calabarensis ) in Oban Hills Region.
Document Type
Academic Journal
Author
Omifolaji JK; Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China.; Department of Forestry and Wildlife Management, Federal University Dutse, Dutse 720222, Jigawa State, Nigeria.; Adedoyin SO; Department of Forestry and Wildlife Management, Prince Abubakar Audu University, Anyigba 272102, Kogi State, Nigeria.; Ikyaagba ET; Department of Social and Environmental Forestry, University of Agriculture, Makurdi 970001, Benue State, Nigeria.; Khan TU; Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China.; Ojo VA; Department of Forestry and Wildlife Management, University of Maiduguri, Maiduguri 600230, Borno State, Nigeria.; Hu Y; Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China.; Alarape AA; Department of Wildlife and Ecotourism Management, University of Ibadan, Ibadan 200132, Oyo Sate, Nigeria.; Jimoh SO; Department of Social and Environmental Forestry, University of Ibadan, Ibadan 200132, Oyo Sate, Nigeria.; Hu H; Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China.
Source
Publisher: Molecular Diversity Preservation International Country of Publication: Switzerland NLM ID: 101635614 Publication Model: Electronic Cited Medium: Print ISSN: 2076-2615 (Print) Linking ISSN: 20762615 NLM ISO Abbreviation: Animals (Basel) Subsets: PubMed not MEDLINE
Subject
Language
English
ISSN
2076-2615
Abstract
Population abundance and density estimates play important roles in biodiversity conservation assessment and can lead to prioritization of conservation efforts, strategies, and management. The Calabar angwantibo ( Arctocebus calabarensis ) is a poorly studied, Near-Threatened nocturnal, arboreal mammal species occurring only in the lowland moist tropical rainforest blocks of southeastern Nigeria and southwestern Cameroon. Like other arboreal nocturnal mammals, there are gaps in knowledge of the distribution and abundance of this species, which may be facing population declines due to habitat loss and hunting. In this study, we investigated the abundance and density of A. calabarensis in the Oban Hills Region of Nigeria. We conducted systematic distance sampling survey along 32 transects in different habitats in a 1227 km of survey efforts. A total of 41 sightings of A. calabarensis were detected, resulting in an abundance of 7345 individuals (95% CI = 1.51-4.37) with an estimated density of 2.57 animals/km 2 . The estimated population abundance is 6515 individuals in closed-canopy forests and 830 individuals in secondary forests, with encounter rates of 0.52 individual/km 2 and 0.60 individuals/km 2 in the closed canopy and secondary forest habitats. The global estimates encounter rate of A. calabarensis across the habitat types is 0.33 individuals/km 2 and population abundance of 4456 individuals. Our findings indicate that the A. calabarensis populations can adapt to low changes in forest habitat modifications resulting from increasing and widespread forest disturbance by human-dominated activity, which is giving way to forest clearance for agriculture cultivation and infrastructural development. Our findings help to fill a knowledge gap regarding this species and may help establish a baseline for future management, population monitoring, and conservation of the cryptic population of A. calabarensis in Cross-Sanaga Forests.