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McGrath SJ, Liu J, Stevenson BC, Behie AM. Density and population size estimates of the endangered northern yellow-cheeked crested gibbon Nomascus annamensis in selectively logged Veun Sai-Siem Pang National Park in Cambodia using acoustic spatial capture-recapture methods. PLoS One 2023; 18:e0292386. [PMID: 38011169 PMCID: PMC10681233 DOI: 10.1371/journal.pone.0292386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 09/19/2023] [Indexed: 11/29/2023] Open
Abstract
Many gibbon species are threatened with extinction, including the endangered northern yellow-cheeked crested gibbon, Nomascus annamensis. Assessing gibbon populations and understanding how human disturbances and environmental factors impact these populations is vital for effective conservation planning. In 2010, auditory surveys revealed that Veun Sai-Siem Pang National Park (VSSP) in Cambodia contains one of the largest known N. annamensis populations in the world, with an estimated 456 (95% CI 421-490) gibbon groups. Illegal selective logging is common in the park, but the impact of continued logging on the gibbon population has not been investigated. To determine any change in the N. annamensis population since 2010, between January and April 2019 we conducted auditory surveys at 13 sites that were at least 4 km apart. We surveyed each site for three days, each day recording the gibbon calls heard over 3.25 hours from three listening posts located 500 m apart. At the same sites, we assessed the logging intensity using transects and ecological plots. Gibbon densities can be influenced by various environmental factors such as canopy height and forest type. Therefore, in addition to investigating the relationship between the density of N. annamensis groups and logging, we included five additional environmental variables in our acoustic spatial capture-recapture models. Our best fit model with the lowest AIC value included canopy height, forest type, distance to villages, and logging. We estimate that there are 389 (95% CI 284-542) N. annamensis groups currently in VSSP. Selective logging is widespread in the park, primarily targeting four tree species. The estimated felling time of these logged trees, together with previous reports, indicate that the species most targeted in VSSP varies over time. To conserve the N. annamensis population in VSSP, it is crucial that action is taken to reduce illegal logging.
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Affiliation(s)
- Sarah J. McGrath
- School of Archaeology and Anthropology, The Australian National University, Acton, ACT, Australia
| | - Jing Liu
- Department of Statistics, University of Auckland, Auckland, New Zealand
| | - Ben C. Stevenson
- Department of Statistics, University of Auckland, Auckland, New Zealand
| | - Alison M. Behie
- School of Archaeology and Anthropology, The Australian National University, Acton, ACT, Australia
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Vu TT, Doherty PF, T Nguyen H, Clink DJ, Nguyen MD, Dong HT, Cheyne SM, Giang TT, Phan DV, Ta NT, Tran DV. Passive acoustic monitoring using smartphones reveals an alarming gibbon decline in a protected area in the central Annamite Mountains, Vietnam. Am J Primatol 2023; 85:e23544. [PMID: 37572084 DOI: 10.1002/ajp.23544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/28/2023] [Accepted: 08/02/2023] [Indexed: 08/14/2023]
Abstract
Monitoring populations is critical for understanding how they respond to anthropogenic disturbance and for management of protected areas. The use of passive acoustic monitoring can improve monitoring efforts as it allows for collection of data on vocal animals at spatial and temporal scales that are difficult using only human observers. In this study, we used a multiseason occupancy model to monitor occurrence, apparent extinction, and colonization probabilities of a northern yellow-cheeked gibbon, Nomascus annamensis population with acoustic data collected from mobile smartphones in Dakrong Nature Reserve, Vietnam. Forty-five sites were randomly selected for repeated surveys in 2019 and 2022. At each site, a mobile smartphone was attached to a tree and recorded sounds for 4.2 days and 3.89 days on average, in 2019 and 2022, respectively. We manually annotated spectrograms for the presence of gibbon calls, and we detected gibbons at 24 and 12 recording posts in 2019 and 2022, respectively. Estimated local apparent extinction from occupancy models was high with 67% of occupied sites in 2019 becoming unoccupied in 2022. Apparent colonization was low with ~25% of unoccupied sites in 2019 becoming occupied in 2022. As a result, the apparent occurrence probability declined from 0.58 in 2019 to 0.30 in 2022. If the absence of calls indicates that cells are unoccupied this would mean an alarming decline of the gibbon population in the nature reserve. We suggest that in the areas with high hunting pressure, monitoring intervals should be shortened to at least yearly. In addition, urgent actions, such as patrolling, or gun confiscation, should be implemented to conserve the gibbon populations in Dakrong Nature Reserve and other protected areas with the same management context.
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Affiliation(s)
- Thinh T Vu
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Paul F Doherty
- Department of Fish, Wildlife, and Conservation Biology, Warner College of Natural Resources, Colorado State University, Fort Collins, Colorado, USA
| | - Hoa T Nguyen
- Institute for Tropical biodiversity and Forestry, Hanoi, Vietnam
| | - Dena J Clink
- Cornell Lab of Ornithology, K. Lisa Yang Center for Conservation Bioacoustics, Cornell University, Ithaca, New York, USA
| | - Manh D Nguyen
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Hai T Dong
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Susan M Cheyne
- Faculty of Humanities and Social Sciences, Oxford Brookes University, Headington Campus, Oxford, UK
| | - Toan T Giang
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Dai V Phan
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Nga T Ta
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Dung V Tran
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
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Okuda T, Matsubara H, Yamada T, Chew WC, Lau AMS, Paska J, Nishizaki H, Omar NSUBS, Zakaria M. Spatial distribution of white-handed gibbon calls in relation to forest vertical components, Malaysia, from a perspective of forest management. Glob Ecol Conserv 2022; 38:e02245. [DOI: 10.1016/j.gecco.2022.e02245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Kufa CA, Bekele A, Atickem A. Impacts of climate change on predicted habitat suitability and distribution of Djaffa Mountains Guereza (Colobus guereza gallarum, Neumann 1902) using MaxEnt algorithm in Eastern Ethiopian Highland. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2022.e02094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Vu TT, Hoa Anh NQ, Rawson BM, Tran DV, Nguyen HT, Van TN. Monitoring occurrence, extinction, and colonization probabilities for gibbon populations. Am J Primatol 2020; 82:e23171. [PMID: 32632969 DOI: 10.1002/ajp.23171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/21/2020] [Accepted: 06/25/2020] [Indexed: 11/08/2022]
Abstract
All gibbon species (Family: Hylobatidae) are considered threatened with extinction and recognized on the International Union for Conservation of Nature Red List of Threatened Species. Because gibbons are one of the most threatened families of primates, monitoring their status is now critically important. Long-term monitoring programs applying occupancy approaches, in addition to assessing occurrence probability, improves understanding of other population parameters such as site extinction or colonization probabilities, which elucidate temporal and spatial changes and are therefore important for guiding conservation efforts. In this study, we used multiple season occupancy models to monitor occurrence, extinction, and colonization probabilities for northern yellow-cheeked crested gibbon Nomascus annamensis in three adjacent protected areas in the Central Annamites mountain range, Vietnam. We collected data at 30 listening posts in 2012, 2014, and 2016 using the auditory point count method. Occurrence probabilities were highest in 2012 (0.74, confidence interval [CI]: 0.56-0.87) but slightly lower in 2014 (0.66, CI: 0.51-0.79) and 2016 (0.67, CI: 0.49-0.81). Extinction probabilities during the 2012-2014 and 2014-2016 intervals were 0.26 (0.14-0.44) and 0.25 (0.12-0.44), respectively. Colonization probabilities during 2012-2014 were 0.44 (0.19-0.73) and between 2014 and 2016 was 0.51 (0.26-0.75). Although local site extinctions have occurred, high recolonization probability helped to replenish the unoccupied sites and kept the occurrence probability stable. Long-term monitoring programs which use occurrence probability alone might not fully reveal the true dynamics of gibbon populations. We strongly recommend including multiple season occupancy models to monitor occurrence, extinction, and colonization probabilities in long-term gibbon monitoring programs.
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Affiliation(s)
- Thinh T Vu
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | | | | | - Dung V Tran
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
| | - Hoa T Nguyen
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Hanoi, Vietnam
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Tran DV, Vu TT. Combining species distribution modeling and distance sampling to assess wildlife population size: A case study with the northern yellow-cheeked gibbon (Nomascus annamensis). Am J Primatol 2020; 82:e23169. [PMID: 32608108 DOI: 10.1002/ajp.23169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 05/26/2020] [Accepted: 06/20/2020] [Indexed: 11/05/2022]
Abstract
Population size and distribution data for wildlife species play an important role in conservation and management, especially for endangered species. However, scientists seriously lack data on the population status of many species. The northern yellow-cheeked gibbon (Nomascus annamensis) is found in southern Lao PDR, central Vietnam, and northeastern Cambodia. The population of the species has significantly declined due to hunting, habitat loss, and the wildlife trade. To examine the population size and distribution of N. annamensis, we conducted a field survey in Song Thanh Nature Reserve, Quang Nam Province, central Vietnam from February to April 2019 using the audio point count method. We combined Distance Sampling and Ecological Niche Modeling to estimate the population of the gibbons. Results showed that the total suitable area for the gibbons was about 302.32 km2 , with the two most important variables of the habitat model being the distance-to-villages and forest type. We detected 36 gibbon groups through field surveys and estimated 443 (95% CI, 278-707) gibbon groups in Song Thanh Nature Reserve. Our results indicate that the gibbon population in Song Thanh Nature Reserve is the largest known population of N. annamensis in Vietnam. In addition, our study was the first to combine species distribution modeling with distance sampling to estimate gibbon density and population size. This approach might be useful in surveying and monitoring gibbon populations because it takes imperfect detection probability into account in estimating gibbon population density while estimating the area of potential habitat using environmental variables.
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Affiliation(s)
- Dung Van Tran
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam.,Graduate School of Global Environmental Studies, Kyoto University, Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto, Japan
| | - Thinh Tien Vu
- Department of Wildlife, Faculty of Forest Resource and Environment Management, Vietnam National University of Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam.,Institute for Tropical Biodiversity and Forestry, Xuan Mai, Chuong My, Ha Noi, Vietnam
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Steffens TS, Mercado Malabet F, Lehman SM. Occurrence of lemurs in landscapes and their species-specific scale responses to habitat loss. Am J Primatol 2020; 82:e23110. [PMID: 32083335 DOI: 10.1002/ajp.23110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 01/31/2020] [Accepted: 02/09/2020] [Indexed: 11/08/2022]
Abstract
Studies on the impact of habitat loss on species occurrence consistently find that the amount of habitat (measured as patch area) is a major determinant of species occurrence at a patch-level. However, patch-level research may fail to detect important patterns and processes only observable at a landscape-level. A landscape-level approach that incorporates species-specific scale responses is needed to better understand what drives species occurrence. Our aim was to determine the landscape-level scale of effect of habitat amount on the occurrence of three species of nocturnal lemurs (Cheirogaleus medius, Microcebus murinus, and M. ravelobensis). We surveyed line transects to determine the occurrence of three lemur species within a fragmented landscape of deciduous dry forest and anthropogenic grassland in northwestern Madagascar. To determine the scale of effect of habitat loss on lemur occurrence, we compared logistic regression models of occurrence against habitat amount among eight different landscape scales using Akaike's Information Criterion values. We found differing scale responses among the lemurs in our study. Occurrence of C. medius responded to habitat amount at scales between 0.5-4 ha, M. murinus at scales between 1 and 4 ha and M. ravelobensis at scales between 0.125 and 4 ha. We suggest that the scale of effect for C. medius is mediated by their ability to hibernate. A relatively lower scale-response for Microcebus spp. likely reflect their omnivorous diet, small habitat requirements, and limited dispersal ability. Differences in scale responses between M. murinus and M. ravelobensis are likely a result of differing dispersal ability and responses to edge effects between these species. Our study is among the first on lemurs to show the value of a landscape-level approach when assessing the effects of habitat loss on species occurrence.
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Affiliation(s)
- Travis S Steffens
- Department of Anthropology, University of Toronto, Ontario, Canada.,Planet Madagascar, Ontario, Guelph, Canada.,Department of Sociology and Anthropology, University of Guelph, Ontario, Canada
| | | | - Shawn M Lehman
- Department of Anthropology, University of Toronto, Ontario, Canada
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9
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Gestich CC, Arroyo‐Rodríguez V, Ribeiro MC, da Cunha RGT, Setz EZF. Unraveling the scales of effect of landscape structure on primate species richness and density of titi monkeys (
Callicebus nigrifrons
). Ecol Res 2018. [DOI: 10.1111/1440-1703.1009] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Carla C. Gestich
- Departamento de Biologia Animal Universidade Estadual de Campinas Campinas São Paulo Brazil
| | - Víctor Arroyo‐Rodríguez
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México Morelia Michoacán Mexico
| | - Milton C. Ribeiro
- Laboratório de Ecologia Espacial e Conservação (LEEC), Departamento de Ecologia Universidade Estadual Paulista (UNESP) Rio Claro São Paulo Brazil
| | - Rogério G. T. da Cunha
- Instituto de Ciências da Natureza Universidade Federal de Alfenas Alfenas Minas Gerais Brazil
| | - Eleonore Z. F. Setz
- Departamento de Biologia Animal Universidade Estadual de Campinas Campinas São Paulo Brazil
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Hon N, Behie AM, Rothman JM, Ryan KG. Nutritional composition of the diet of the northern yellow-cheeked crested gibbon (Nomascus annamensis) in northeastern Cambodia. Primates 2018; 59:339-346. [PMID: 29691702 DOI: 10.1007/s10329-018-0663-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Accepted: 04/05/2018] [Indexed: 11/28/2022]
Abstract
This study measured the nutritional composition of foods consumed by the northern yellow-cheeked crested gibbon (Nomascus annamensis) in northeastern Cambodia. One group of N. annamensis was studied, and focal animal sampling was used to observe their feeding behavior. The study was conducted for 4 months (January-April 2015) in the dry season and 69 foods were collected for nutritional analyses. N. annamensis fed on 37 plant species, but only seven species made up more than 80% of feeding time. N. annamensis spent the majority of their time feeding on fruit (60.36%), followed by young leaves (22.60%), flowers (13.74%), and mature leaves (3.30%). Fruit had the highest concentrations of total non-structural carbohydrates, while young leaves had the highest concentration of crude protein compared to other food items. All food items had similar concentrations of lipids, except young leaves, which had lower levels than fruit and flowers. All plant parts consumed by N. annamensis had similar amounts of neutral detergent fiber, acid detergent fiber, and acid detergent lignin. Thirty-two percent of all food items contained condensed tannins, and they had a similar level of it. All foods also had similar energy contents. This study adds to our knowledge of the feeding ecology of N. annamensis by providing baseline data on the make-up of the foods they eat and may contribute to captive feeding programs, ultimately assisting the conservation of this species.
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Affiliation(s)
- Naven Hon
- Conservation International Greater Mekong, Phnom Penh, Cambodia. .,School of Biological Science, Victoria University of Wellington, Wellington, New Zealand.
| | - Alison M Behie
- School of Archaeology and Anthropology, Australian National University, Canberra, Australia
| | - Jessica M Rothman
- Department of Anthropology, Hunter College of the City University of New York, New York, USA.,New York Consortium in Evolutionary Primatology, New York, NY, USA
| | - Ken G Ryan
- School of Biological Science, Victoria University of Wellington, Wellington, New Zealand
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Detogne N, Ferreguetti ÁC, Mello JHF, Santana MC, da Conceição Dias A, da Mota NCJ, Esteves da Cruz Gonçalves A, de Souza CP, Bergallo HG. Spatial distribution of buffy-tufted-ear (Callithrix aurita) and invasive marmosets (Callithrix spp.) in a tropical rainforest reserve in southeastern Brazil. Am J Primatol 2017; 79. [PMID: 29072335 DOI: 10.1002/ajp.22718] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 11/08/2022]
Abstract
We investigated the spatial distribution of native and invasive marmoset species (Callithrix), as well as their hybrids, in the Serra dos Órgãos National Park (PARNASO) and surrounding area in Rio de Janeiro state, Brazil. To estimate occupancy and the detection probability, we surveyed 56 sites within the park and 52 sites outside its limits using vocal playbacks, as well as by interviewing local residents in the surrounding area. We estimated the occupancy and detection probability of Callithrix aurita and the observed groups composed of Callithrix jacchus, Callithrix penicillata, and their hybrids. We also recorded the presence or absence of mixed groups of native and exotic species, and their hybrids. We recorded similar occupancy rates and detection probabilities for both native and invasive species within the national park. C. aurita was found more often within the areas of the park located furthest from access roads and with the least human interference, while invasive species were more likely to be found along the edge of the park and in areas with greater human interference. In the area surrounding the park, invasive marmosets were recorded at seven sites, and a mixed group of native and invasive marmosets was observed at one site, but non-hybrid C. aurita groups were not recorded. The occupancy probability of C. aurita in the study area is relatively low, which may indicate a low population density, with groups restricted to a small region within the PARNASO in the proximity of groups of invasive marmosets.
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Affiliation(s)
- Nathalia Detogne
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Átilla C Ferreguetti
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - José Henrique F Mello
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Marcelo C Santana
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Aline da Conceição Dias
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Natalia C J da Mota
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | | | - Cristiane P de Souza
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | - Helena G Bergallo
- Department of Ecology, Institute of Biology, Rio de Janeiro State University, Rio de Janeiro, Brazil
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Asensio N, José-Domínguez JM, Kongrit C, Brockelman WY. The ecology of white-handed and pileated gibbons in a zone of overlap and hybridization in Thailand. Am J Phys Anthropol 2017; 163:716-728. [PMID: 28726303 DOI: 10.1002/ajpa.23241] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 01/15/2017] [Accepted: 04/17/2017] [Indexed: 11/07/2022]
Abstract
OBJECTIVES The study of related species in contact zones can elucidate what factors mediate species coexistence and geographical distributions. We investigated niche overlap and group interactions of two gibbon species and their hybrids co-occurring in a zone of overlap and hybridization. METHODS The location, composition and behavior of white-handed, pileated, and mixed-species gibbon groups were studied by following them during 31 consecutive months in a relatively large part of the contact zone. RESULTS Twenty groups of white-handed gibbon were mapped followed by nine groups of pileated gibbons and five mixed-species groups. White-handed, pileated and mixed-species groups had similar sizes and composition, ate a high proportion of fruits, shared a large number of species in their diets, and presented similar habitat preferences. Group home range sizes did not differ between species and overlapped little with neighboring groups irrespective of species, and intraspecific and interspecific encounter rates were similar. DISCUSSION Ecological similarities support that competition between the gibbon species exists and takes the form of interspecific territoriality. However, we could not find any clear mechanism of niche partitioning favoring coexistence between species. Our findings suggest that the contact zone is unstable and is maintained by dispersal inward from groups of the parental species. The relatively low numbers of mixed-species groups and hybrids found suggests a high degree of premating reproductive isolation, perhaps mediated by interspecific miscommunication. The existence of hybrids and backcrosses potentially undetectable from phenotypic characters alone raises the possibility of more widespread introgression than has been evident. Hence, while interspecific territoriality should reduce the rate of gene transfer, it would not necessarily present a barrier to introgression into contiguous populations of the opposite species.
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Affiliation(s)
- Norberto Asensio
- Faculty of Environment and Resource Studies, Mahidol University, Salaya, Nakhon Pathom, 73170, Thailand
| | | | - Chalita Kongrit
- Department of Biology, Faculty of Science, Mahidol University, Rachathewi, Bangkok, 10400, Thailand
| | - Warren Y Brockelman
- Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand.,Ecology Laboratory, BIOTEC, National Science and Technology Development Agency, Khong 2, Pathum Thani 12123, Thailand
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Stone OML, Guy AJ. Predicting Optimal Release Sites for Rehabilitated Monkeys: a Vervet Monkey (Chlorocebus aethiops) Case Study. INT J PRIMATOL 2017; 38:485-99. [DOI: 10.1007/s10764-017-9956-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ramírez-Rivera EDJ, Lopez-Collado J, Díaz-Rivera P, Ortega-Jiménez E, Torres-Hernández G, Jacinto-Padilla J, Herman-Lara E. A multi-criteria approach to identify favorable areas for goat production systems in Veracruz, México. Trop Anim Health Prod 2017; 49:725-731. [PMID: 28185210 DOI: 10.1007/s11250-017-1249-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 01/30/2017] [Indexed: 11/28/2022]
Abstract
This research identifies favorable areas for goat production systems in the state of Veracruz, Mexico. Through the use of the analytic hierarchy process, layers of biophysical and soil information were combined to generate a model of favorability. Model validation was performed by calculating the area under the curve, the true skill statistic, and a qualitative comparison with census records. The results showed the existence of regions with high (4494.3 km2) and moderate (2985.8 km2) favorability, and these areas correspond to 6.25 and 4.15%, respectively, of the state territory and are located in the regions of Sierra de Huayacocotla, Perote, and Orizaba. These regions are characterized as mountainous and having predominantly temperate-wet or cold climates, and having montane mesophilic forests, containing pine, fir, and desert scrub. The reliability of the distribution model was supported by the area under the curve value (0.96), the true skill statistic (0.86), and consistency with census records.
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Affiliation(s)
- Emmanuel de Jesús Ramírez-Rivera
- Programa de Agroecosistemas Tropicales, Colegio de Postgraduados, Campus Veracruz, Carretera Federal Xalapa-Veracruz km 88.5, Veracruz, Código Postal 91690, Mexico
| | - Jose Lopez-Collado
- Programa de Agroecosistemas Tropicales, Colegio de Postgraduados, Campus Veracruz, Carretera Federal Xalapa-Veracruz km 88.5, Veracruz, Código Postal 91690, Mexico.
| | - Pablo Díaz-Rivera
- Programa de Agroecosistemas Tropicales, Colegio de Postgraduados, Campus Veracruz, Carretera Federal Xalapa-Veracruz km 88.5, Veracruz, Código Postal 91690, Mexico
| | - Eusebio Ortega-Jiménez
- Programa de Agroecosistemas Tropicales, Colegio de Postgraduados, Campus Veracruz, Carretera Federal Xalapa-Veracruz km 88.5, Veracruz, Código Postal 91690, Mexico
| | - Glafiro Torres-Hernández
- Programa de Ganadería, Colegio de Postgraduados, Campus Montecillo, Carretera México-Texcoco km 36.5, Montecillo, Texcoco, Código Postal 56230, Mexico
| | - Jazmín Jacinto-Padilla
- Programa de Agroecosistemas Tropicales, Colegio de Postgraduados, Campus Veracruz, Carretera Federal Xalapa-Veracruz km 88.5, Veracruz, Código Postal 91690, Mexico
| | - Erasmo Herman-Lara
- Coordinación de Postgrado e Investigación, Instituto Tecnológico de Tuxtepec, Calzada Dr. Víctor Bravo A. s/n, Tuxtepec, Oaxaca, Código Postal 68350, Mexico
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Serckx A, Huynen MC, Beudels-Jamar RC, Vimond M, Bogaert J, Kühl HS. Bonobo nest site selection and the importance of predictor scales in primate ecology. Am J Primatol 2016; 78:1326-1343. [DOI: 10.1002/ajp.22585] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 06/18/2016] [Accepted: 07/04/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Adeline Serckx
- Primatology Research Group, Behavioral Biology Unit; University of Liege; Liege Belgium
- Conservation Biology Unit; Royal Belgian Institute of Natural Sciences; Brussels Belgium
- Ecole Régionale Post-Universitaire d'Aménagement et de Gestion Intégrés des Forêts et Territoires Tropicaux; Kinshasa Democratic Republic of the Congo
- Department of Primatology; Max Planck Institute for Evolutionary Anthropology; Leipzig Germany
| | - Marie-Claude Huynen
- Primatology Research Group, Behavioral Biology Unit; University of Liege; Liege Belgium
| | | | - Marie Vimond
- Primatology Research Group, Behavioral Biology Unit; University of Liege; Liege Belgium
| | - Jan Bogaert
- Biodiversity and Landscape Architecture Unit, Gembloux AgroBio-Tech; University of Liege; Gembloux Belgium
| | - Hjalmar S. Kühl
- Department of Primatology; Max Planck Institute for Evolutionary Anthropology; Leipzig Germany
- German Center for Integrative Biodiversity Research (iDiv); Leipzig Germany
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Gestich CC, Caselli CB, Nagy-Reis MB, Setz EZF, da Cunha RGT. Estimating primate population densities: the systematic use of playbacks along transects in population surveys. Am J Primatol 2016; 79:1-9. [DOI: 10.1002/ajp.22586] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Carla C. Gestich
- Departamento de Biologia Animal; Universidade Estadual de Campinas; Campinas São Paulo Brazil
| | - Christini B. Caselli
- Departamento de Ciências Biológicas; Universidade Federal Rural de Pernambuco; Recife Pernambuco Brazil
| | - Mariana B. Nagy-Reis
- Departamento de Biologia Animal; Universidade Estadual de Campinas; Campinas São Paulo Brazil
| | - Eleonore Z. F. Setz
- Departamento de Biologia Animal; Universidade Estadual de Campinas; Campinas São Paulo Brazil
| | - Rogério G. T. da Cunha
- Instituto de Ciências da Natureza; Universidade Federal de Alfenas; Alfenas Minas Gerais Brazil
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17
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18
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Ingberman B, Fusco-Costa R, Monteiro-Filho ELDA. A Current Perspective on the Historical Geographic Distribution of the Endangered Muriquis (Brachyteles spp.): Implications for Conservation. PLoS One 2016; 11:e0150906. [PMID: 26943910 PMCID: PMC4778866 DOI: 10.1371/journal.pone.0150906] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/22/2016] [Indexed: 11/24/2022] Open
Abstract
The muriqui (Brachyteles spp.), endemic to the Atlantic Forest of Brazil, is the largest primate in South America and is endangered, mainly due to habitat loss. Its distribution limits are still uncertain and need to be resolved in order to determine their true conservation status. Species distribution modeling (SDM) has been used to estimate potential species distributions, even when information is incomplete. Here, we developed an environmental suitability model for the two endangered species of muriqui (Brachyteles hypoxanthus and B. arachnoides) using Maxent software. Due to historical absence of muriquis, areas with predicted high habitat suitability yet historically never occupied, were excluded from the predicted historical distribution. Combining that information with the model, it is evident that rivers are potential dispersal barriers for the muriquis. Moreover, although the two species are environmentally separated in a large part of its distribution, there is a potential contact zone where the species apparently do not overlap. This separation might be due to either a physical (i.e., Serra da Mantiqueira mountains) or a biotic barrier (the species exclude one another). Therefore, in addition to environmental characteristics, physical and biotic barriers potentially shaped the limits of the muriqui historical range. Based on these considerations, we proposed the adjustment of their historical distributional limits. Currently only 7.6% of the predicted historical distribution of B. hypoxanthus and 12.9% of B. arachnoides remains forested and able to sustain viable muriqui populations. In addition to measurement of habitat loss we also identified areas for conservation concern where new muriqui populations might be found.
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Affiliation(s)
- Bianca Ingberman
- Programa de Pós-Graduação em Ecologia e Conservação, Universidade Federal do Paraná (UFPR), Curitiba, Paraná, Brazil
- Wildlife Research Department, Instituto de Pesquisas Cananéia (IPeC), Cananéia, São Paulo, Brazil
- * E-mail:
| | - Roberto Fusco-Costa
- Wildlife Research Department, Instituto de Pesquisas Cananéia (IPeC), Cananéia, São Paulo, Brazil
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Chiatante G, Brambilla M, Bogliani G. Spatially explicit conservation issues for threatened bird species in Mediterranean farmland landscapes. J Nat Conserv 2014; 22:103-12. [DOI: 10.1016/j.jnc.2013.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Saito M, Koike F. Distribution of wild mammal assemblages along an urban-rural-forest landscape gradient in warm-temperate East Asia. PLoS One 2013; 8:e65464. [PMID: 23741495 PMCID: PMC3669276 DOI: 10.1371/journal.pone.0065464] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 05/01/2013] [Indexed: 11/18/2022] Open
Abstract
Urbanization may alter mammal assemblages via habitat loss, food subsidies, and other factors related to human activities. The general distribution patterns of wild mammal assemblages along urban-rural-forest landscape gradients have not been studied, although many studies have focused on a single species or taxon, such as rodents. We quantitatively evaluated the effects of the urban-rural-forest gradient and spatial scale on the distributions of large and mid-sized mammals in the world's largest metropolitan area in warm-temperate Asia using nonspecific camera-trapping along two linear transects spanning from the urban zone in the Tokyo metropolitan area to surrounding rural and forest landscapes. Many large and mid-sized species generally decreased from forest landscapes to urban cores, although some species preferred anthropogenic landscapes. Sika deer (Cervus nippon), Reeves' muntjac (Muntiacus reevesi), Japanese macaque (Macaca fuscata), Japanese squirrel (Sciurus lis), Japanese marten (Martes melampus), Japanese badger (Meles anakuma), and wild boar (Sus scrofa) generally dominated the mammal assemblage of the forest landscape. Raccoon (Procyon lotor), raccoon dog (Nyctereutes procyonoides), and Japanese hare (Lepus brachyurus) dominated the mammal assemblage in the intermediate zone (i.e., rural and suburban landscape). Cats (feral and free-roaming housecats; Felis catus) were common in the urban assemblage. The key spatial scales for forest species were more than 4000-m radius, indicating that conservation and management plans for these mammal assemblages should be considered on large spatial scales. However, small green spaces will also be important for mammal conservation in the urban landscape, because an indigenous omnivore (raccoon dog) had a smaller key spatial scale (500-m radius) than those of forest mammals. Urbanization was generally the most important factor in the distributions of mammals, and it is necessary to consider the spatial scale of management according to the degree of urbanization.
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Affiliation(s)
- Masayuki Saito
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan.
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Affiliation(s)
- Wai-Ming Wong
- Durrell Institute of Conservation and Ecology; University of Kent; Kent; CT2 7NR; UK
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Bradter U, Kunin WE, Altringham JD, Thom TJ, Benton TG. Identifying appropriate spatial scales of predictors in species distribution models with the random forest algorithm. Methods Ecol Evol 2012. [DOI: 10.1111/j.2041-210x.2012.00253.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ute Bradter
- School of Biology; University of Leeds; Leeds; LS2 9JT; UK
| | | | | | - Tim J. Thom
- Yorkshire Dales National Park Authority; Grassington; BD23 5LB; UK
| | - Tim G. Benton
- School of Biology; University of Leeds; Leeds; LS2 9JT; UK
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Millar CS, Blouin-demers G. Habitat suitability modelling for species at risk is sensitive to algorithm and scale: A case study of Blanding's turtle, Emydoidea blandingii, in Ontario, Canada. J Nat Conserv 2012; 20:18-29. [DOI: 10.1016/j.jnc.2011.07.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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SKROBLIN ANJA, LEGGE SARAH. Influence of fine-scale habitat requirements and riparian degradation on the distribution of the purple-crowned fairy-wren (Malurus coronatus coronatus) in northern Australia. AUSTRAL ECOL 2011. [DOI: 10.1111/j.1442-9993.2011.02331.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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