The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform
Manuel Ruizgarcia - One of the best experts on this subject based on the ideXlab platform.
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the mystery of the origins of Cebus Albifrons malitiosus and Cebus Albifrons hypoleucus mitogenomics and microsatellite analyses revealed an amazing evolutionary history of the northern colombian white fronted capuchins
Mitochondrial DNA, 2019Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Norberto Leguizamon, Aurita Bello, Joseph Mark ShostellAbstract:AbstractKnowledge of the genetic units of species is fundamental to the conservation of biodiversity. This is true for all regions, including the Neotropics where the Earth has its greatest diversi...
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how many species taxa or lineages of Cebus Albifrons platyrrhini primates inhabit ecuador insights from mitogenomics
International Journal of Primatology, 2018Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Pablo Moreno, Luis Albuja, Christian Miguel Pinto, Joseph Mark ShostellAbstract:A first step in protecting groups of similarly structured organisms is to place them into discrete taxa. Molecular genetics and phylogeny allow us to rebuild the evolutionary history of these taxa. The Neotropics has roughly 34% of Earth’s primate diversity. However, the systematics of Neotropical primates is complex and controversial. The untufted (gracile) capuchins are traditionally classified as four species: Cebus Albifrons, C. capucinus, C. olivaceus, and C. kaapori. Of these, Cebus Albifrons has confusing intraspecific systematics with a large number of fragmented and isolated populations throughout its geographical distribution, and up to 13 morphological subspecies. The number of taxa of this species in Ecuador, some areas of northern and eastern Colombia, and Trinidad Island is particularly debated. Primatologists have defined two taxa of C. Albifrons in Ecuador: a trans-Andean population: C. a. aequatorialis (or C. aequatorialis) and a cis-Andean population: C. a. yuracus (or C. yuracus). To better understand the systematics of this species, we sequenced the mitogenomes of 136 Cebus Albifrons, two Cebus olivaceus, and one Cebus kaapori. Our phylogenetic analyses revealed at least nine significantly different haplogroups of C. Albifrons in Ecuador, four of which contained exemplars from both the trans-Andean Pacific Ecuador and the cis-Andean Ecuadorian Amazon. The splits of these Ecuadorian haplogroups, and the initial diversification within them, occurred during the Middle to Late Pliocene and the beginning of the Pleistocene. Individuals we analyzed from Vichada Department in eastern Colombia were genetically distinct from other groups of C. Albifrons, agreeing with morphological studies which consider it a full subspecies (C. a. Albifrons). Phylogenetic analyses showed two different gracile capuchin taxa on Trinidad Island: C. a. trininatis and C. o. brunneus. We conclude that a large portion of the gracile capuchin taxa form a unique species with a complex of populations and subspecies. The species has conserved its reproductive integrity by repeated episodes of reticulation and high levels of gene flow.
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molecular phylogenetics and phylogeography of the white fronted capuchin Cebus Albifrons cebidae primates by means of mtcoii gene sequences
Molecular Phylogenetics and Evolution, 2010Co-Authors: Manuel Ruizgarcia, Maria Ignacia Castillo, Joseph Mark Shostell, Catalina Vasquez, K Rodriguez, Myreya Pinedocastro, Norberto LeguizamonAbstract:Abstract A total of 696 base pairs (bp) of the mitochondrial COII gene were sequenced from 118 individuals of Cebus Albifrons (plus an individual of Cebus olivaceus ) sampled from diverse geographical areas of Colombia, Peru, Ecuador and Brazil. These animals represented all of the C. Albifrons ’s taxa described by Hershkovitz (1949) in Colombia and Peru (10 out of 13 subspecies are described by this author). The sequences analyzed demonstrate the existence of three well defined groups in northern Colombia (trans-Andean): malitosus , versicolor-pleei-cesarae and leucocephalus . They arose from at least, three distinct migrations from different Amazonian groups. Five different Amazonian and Eastern Llanos C. Albifrons ’s groups (I, II, III, IV, and V) were also found. In many Amazonian localities, some of these groups live in sympatry probably by secondary expansion after their respective formations. Amazonian group I is closely related to the versicolor-pleei-cesarae group, malitosus is closely related to Amazonian group V, while leucocephalus is closely related to Amazonian group IV. Nevertheless, our genetic analysis could not resolve the genetic relationships among the main C. Albifrons groups. The ρ-statistic applied to the median-joining network yielded that the major part of the temporal splits estimated occurred in the Pleistocene, reinforcing the importance of the Pleistocene refugia during the evolution of C. Albifrons .
Joseph Mark Shostell - One of the best experts on this subject based on the ideXlab platform.
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the mystery of the origins of Cebus Albifrons malitiosus and Cebus Albifrons hypoleucus mitogenomics and microsatellite analyses revealed an amazing evolutionary history of the northern colombian white fronted capuchins
Mitochondrial DNA, 2019Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Norberto Leguizamon, Aurita Bello, Joseph Mark ShostellAbstract:AbstractKnowledge of the genetic units of species is fundamental to the conservation of biodiversity. This is true for all regions, including the Neotropics where the Earth has its greatest diversi...
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how many species taxa or lineages of Cebus Albifrons platyrrhini primates inhabit ecuador insights from mitogenomics
International Journal of Primatology, 2018Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Pablo Moreno, Luis Albuja, Christian Miguel Pinto, Joseph Mark ShostellAbstract:A first step in protecting groups of similarly structured organisms is to place them into discrete taxa. Molecular genetics and phylogeny allow us to rebuild the evolutionary history of these taxa. The Neotropics has roughly 34% of Earth’s primate diversity. However, the systematics of Neotropical primates is complex and controversial. The untufted (gracile) capuchins are traditionally classified as four species: Cebus Albifrons, C. capucinus, C. olivaceus, and C. kaapori. Of these, Cebus Albifrons has confusing intraspecific systematics with a large number of fragmented and isolated populations throughout its geographical distribution, and up to 13 morphological subspecies. The number of taxa of this species in Ecuador, some areas of northern and eastern Colombia, and Trinidad Island is particularly debated. Primatologists have defined two taxa of C. Albifrons in Ecuador: a trans-Andean population: C. a. aequatorialis (or C. aequatorialis) and a cis-Andean population: C. a. yuracus (or C. yuracus). To better understand the systematics of this species, we sequenced the mitogenomes of 136 Cebus Albifrons, two Cebus olivaceus, and one Cebus kaapori. Our phylogenetic analyses revealed at least nine significantly different haplogroups of C. Albifrons in Ecuador, four of which contained exemplars from both the trans-Andean Pacific Ecuador and the cis-Andean Ecuadorian Amazon. The splits of these Ecuadorian haplogroups, and the initial diversification within them, occurred during the Middle to Late Pliocene and the beginning of the Pleistocene. Individuals we analyzed from Vichada Department in eastern Colombia were genetically distinct from other groups of C. Albifrons, agreeing with morphological studies which consider it a full subspecies (C. a. Albifrons). Phylogenetic analyses showed two different gracile capuchin taxa on Trinidad Island: C. a. trininatis and C. o. brunneus. We conclude that a large portion of the gracile capuchin taxa form a unique species with a complex of populations and subspecies. The species has conserved its reproductive integrity by repeated episodes of reticulation and high levels of gene flow.
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molecular phylogenetics and phylogeography of the white fronted capuchin Cebus Albifrons cebidae primates by means of mtcoii gene sequences
Molecular Phylogenetics and Evolution, 2010Co-Authors: Manuel Ruizgarcia, Maria Ignacia Castillo, Joseph Mark Shostell, Catalina Vasquez, K Rodriguez, Myreya Pinedocastro, Norberto LeguizamonAbstract:Abstract A total of 696 base pairs (bp) of the mitochondrial COII gene were sequenced from 118 individuals of Cebus Albifrons (plus an individual of Cebus olivaceus ) sampled from diverse geographical areas of Colombia, Peru, Ecuador and Brazil. These animals represented all of the C. Albifrons ’s taxa described by Hershkovitz (1949) in Colombia and Peru (10 out of 13 subspecies are described by this author). The sequences analyzed demonstrate the existence of three well defined groups in northern Colombia (trans-Andean): malitosus , versicolor-pleei-cesarae and leucocephalus . They arose from at least, three distinct migrations from different Amazonian groups. Five different Amazonian and Eastern Llanos C. Albifrons ’s groups (I, II, III, IV, and V) were also found. In many Amazonian localities, some of these groups live in sympatry probably by secondary expansion after their respective formations. Amazonian group I is closely related to the versicolor-pleei-cesarae group, malitosus is closely related to Amazonian group V, while leucocephalus is closely related to Amazonian group IV. Nevertheless, our genetic analysis could not resolve the genetic relationships among the main C. Albifrons groups. The ρ-statistic applied to the median-joining network yielded that the major part of the temporal splits estimated occurred in the Pleistocene, reinforcing the importance of the Pleistocene refugia during the evolution of C. Albifrons .
Norberto Leguizamon - One of the best experts on this subject based on the ideXlab platform.
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the mystery of the origins of Cebus Albifrons malitiosus and Cebus Albifrons hypoleucus mitogenomics and microsatellite analyses revealed an amazing evolutionary history of the northern colombian white fronted capuchins
Mitochondrial DNA, 2019Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Norberto Leguizamon, Aurita Bello, Joseph Mark ShostellAbstract:AbstractKnowledge of the genetic units of species is fundamental to the conservation of biodiversity. This is true for all regions, including the Neotropics where the Earth has its greatest diversi...
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molecular phylogenetics and phylogeography of the white fronted capuchin Cebus Albifrons cebidae primates by means of mtcoii gene sequences
Molecular Phylogenetics and Evolution, 2010Co-Authors: Manuel Ruizgarcia, Maria Ignacia Castillo, Joseph Mark Shostell, Catalina Vasquez, K Rodriguez, Myreya Pinedocastro, Norberto LeguizamonAbstract:Abstract A total of 696 base pairs (bp) of the mitochondrial COII gene were sequenced from 118 individuals of Cebus Albifrons (plus an individual of Cebus olivaceus ) sampled from diverse geographical areas of Colombia, Peru, Ecuador and Brazil. These animals represented all of the C. Albifrons ’s taxa described by Hershkovitz (1949) in Colombia and Peru (10 out of 13 subspecies are described by this author). The sequences analyzed demonstrate the existence of three well defined groups in northern Colombia (trans-Andean): malitosus , versicolor-pleei-cesarae and leucocephalus . They arose from at least, three distinct migrations from different Amazonian groups. Five different Amazonian and Eastern Llanos C. Albifrons ’s groups (I, II, III, IV, and V) were also found. In many Amazonian localities, some of these groups live in sympatry probably by secondary expansion after their respective formations. Amazonian group I is closely related to the versicolor-pleei-cesarae group, malitosus is closely related to Amazonian group V, while leucocephalus is closely related to Amazonian group IV. Nevertheless, our genetic analysis could not resolve the genetic relationships among the main C. Albifrons groups. The ρ-statistic applied to the median-joining network yielded that the major part of the temporal splits estimated occurred in the Pleistocene, reinforcing the importance of the Pleistocene refugia during the evolution of C. Albifrons .
Fernando A. Campos - One of the best experts on this subject based on the ideXlab platform.
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A Potential Distribution Model and Conservation Plan for the Critically Endangered Ecuadorian Capuchin, Cebus Albifrons aequatorialis
International Journal of Primatology, 2013Co-Authors: Fernando A. Campos, Katharine M. JackAbstract:Conservation actions that effectively and efficiently target single, highly threatened species require current data on the species’ geographic distribution and environmental associations. The Ecuadorian capuchin ( Cebus Albifrons aequatorialis ) is a critically endangered primate found only in the fragmented forests of western Ecuador and northern Peru, which are among the world’s most severely threatened ecosystems. We use the MAXENT species distribution modeling method to model the potential distribution and environmental associations of Cebus Albifrons aequatorialis , using all known presence localities recorded within the last 2 decades as well as 13 climate, topography, vegetation, and land-use data sets covering the entire geographic range of the subspecies. The environmental conditions that our model predicted to be ideal for supporting Cebus Albifrons aequatorialis included ≥20% tree cover, mild temperature seasonality, annual precipitation
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a potential distribution model and conservation plan for the critically endangered ecuadorian capuchin Cebus Albifrons aequatorialis
International Journal of Primatology, 2013Co-Authors: Fernando A. Campos, Katharine M. JackAbstract:Conservation actions that effectively and efficiently target single, highly threatened species require current data on the species’ geographic distribution and environmental associations. The Ecuadorian capuchin (Cebus Albifrons aequatorialis) is a critically endangered primate found only in the fragmented forests of western Ecuador and northern Peru, which are among the world’s most severely threatened ecosystems. We use the MAXENT species distribution modeling method to model the potential distribution and environmental associations of Cebus Albifrons aequatorialis, using all known presence localities recorded within the last 2 decades as well as 13 climate, topography, vegetation, and land-use data sets covering the entire geographic range of the subspecies. The environmental conditions that our model predicted to be ideal for supporting Cebus Albifrons aequatorialis included ≥20% tree cover, mild temperature seasonality, annual precipitation <2000 mm, and low human population density. Our model identified 5028 km2 of suitable habitat remaining, although many of these forest fragments are unprotected and are unlikely to support extant populations. Using the median population density across all sites for which data are available, we estimate the total carrying capacity of the remaining habitat to be 12,500 total individuals. The true number of remaining individuals is likely to be considerably lower due to anthropogenic factors. We highlight four critical regions of high predicted suitability in western Ecuador and northern Peru on which immediate conservation actions should focus, and we lay out clear priorities to guide conservation actions for ensuring the long-term survival of this gravely threatened and little known primate.
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distribution abundance and spatial ecology of the critically endangered ecuadorian capuchin Cebus Albifrons aequatorialis
Tropical Conservation Science, 2012Co-Authors: Katharine M. Jack, Fernando A. CamposAbstract:Geographically isolated from other C. Albifrons taxa found east of the Andes, the Ecuadorian capuchin (Cebus Albifrons aequatorialis) is a Critically Endangered primate that survives in a small number of localities in western Ecuador and extreme northern Peru. We assessed 11 forested areas in western Ecuador to determine presence/absence using a combination of onfoot searching and interviews with local informants. C. a. aequatorialis were present at seven of the sites surveyed, four of which represent new presence localities. We carried out extensive censuses of five small, private reserves to obtain estimates of population density and demographic information. We also examined home range characteristics and habitat selection at one well-studied site. Population densities based on absolute counts at these sites ranged from 2 - 22 individuals/km 2 (median = 2.4). Jauneche, a 138 ha isolated fragment reserve with 22 individuals/km 2 , was a clear outlier. Although we observed some solitary individuals, C. a. aequatorialis live predominantly in multi-male multi-female social groups, with a mean group size of 13.9 (range 5-20). The composition of social groups was typical for Cebus: adult females outnumbered adult males slightly, and groups exhibited relatively high immature to adult female ratios (mean = 1.5). Home ranges were unusually large for the genus (507 – 561 ha). The capuchins exhibited strongest selection for mature forest near streams, although they also used degraded forest frequently. C. a. aequatorialis faces critical threats in the form of habitat loss, hunting, and harassment by farmers, but we suggest that some remaining populations have the potential to grow if effective protection can be established.
Maria Ignacia Castillo - One of the best experts on this subject based on the ideXlab platform.
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the mystery of the origins of Cebus Albifrons malitiosus and Cebus Albifrons hypoleucus mitogenomics and microsatellite analyses revealed an amazing evolutionary history of the northern colombian white fronted capuchins
Mitochondrial DNA, 2019Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Norberto Leguizamon, Aurita Bello, Joseph Mark ShostellAbstract:AbstractKnowledge of the genetic units of species is fundamental to the conservation of biodiversity. This is true for all regions, including the Neotropics where the Earth has its greatest diversi...
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how many species taxa or lineages of Cebus Albifrons platyrrhini primates inhabit ecuador insights from mitogenomics
International Journal of Primatology, 2018Co-Authors: Manuel Ruizgarcia, Sebastian Sanchezcastillo, Maria Ignacia Castillo, Kelly Luengas, Juan Manuel Ortega, Pablo Moreno, Luis Albuja, Christian Miguel Pinto, Joseph Mark ShostellAbstract:A first step in protecting groups of similarly structured organisms is to place them into discrete taxa. Molecular genetics and phylogeny allow us to rebuild the evolutionary history of these taxa. The Neotropics has roughly 34% of Earth’s primate diversity. However, the systematics of Neotropical primates is complex and controversial. The untufted (gracile) capuchins are traditionally classified as four species: Cebus Albifrons, C. capucinus, C. olivaceus, and C. kaapori. Of these, Cebus Albifrons has confusing intraspecific systematics with a large number of fragmented and isolated populations throughout its geographical distribution, and up to 13 morphological subspecies. The number of taxa of this species in Ecuador, some areas of northern and eastern Colombia, and Trinidad Island is particularly debated. Primatologists have defined two taxa of C. Albifrons in Ecuador: a trans-Andean population: C. a. aequatorialis (or C. aequatorialis) and a cis-Andean population: C. a. yuracus (or C. yuracus). To better understand the systematics of this species, we sequenced the mitogenomes of 136 Cebus Albifrons, two Cebus olivaceus, and one Cebus kaapori. Our phylogenetic analyses revealed at least nine significantly different haplogroups of C. Albifrons in Ecuador, four of which contained exemplars from both the trans-Andean Pacific Ecuador and the cis-Andean Ecuadorian Amazon. The splits of these Ecuadorian haplogroups, and the initial diversification within them, occurred during the Middle to Late Pliocene and the beginning of the Pleistocene. Individuals we analyzed from Vichada Department in eastern Colombia were genetically distinct from other groups of C. Albifrons, agreeing with morphological studies which consider it a full subspecies (C. a. Albifrons). Phylogenetic analyses showed two different gracile capuchin taxa on Trinidad Island: C. a. trininatis and C. o. brunneus. We conclude that a large portion of the gracile capuchin taxa form a unique species with a complex of populations and subspecies. The species has conserved its reproductive integrity by repeated episodes of reticulation and high levels of gene flow.
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molecular phylogenetics and phylogeography of the white fronted capuchin Cebus Albifrons cebidae primates by means of mtcoii gene sequences
Molecular Phylogenetics and Evolution, 2010Co-Authors: Manuel Ruizgarcia, Maria Ignacia Castillo, Joseph Mark Shostell, Catalina Vasquez, K Rodriguez, Myreya Pinedocastro, Norberto LeguizamonAbstract:Abstract A total of 696 base pairs (bp) of the mitochondrial COII gene were sequenced from 118 individuals of Cebus Albifrons (plus an individual of Cebus olivaceus ) sampled from diverse geographical areas of Colombia, Peru, Ecuador and Brazil. These animals represented all of the C. Albifrons ’s taxa described by Hershkovitz (1949) in Colombia and Peru (10 out of 13 subspecies are described by this author). The sequences analyzed demonstrate the existence of three well defined groups in northern Colombia (trans-Andean): malitosus , versicolor-pleei-cesarae and leucocephalus . They arose from at least, three distinct migrations from different Amazonian groups. Five different Amazonian and Eastern Llanos C. Albifrons ’s groups (I, II, III, IV, and V) were also found. In many Amazonian localities, some of these groups live in sympatry probably by secondary expansion after their respective formations. Amazonian group I is closely related to the versicolor-pleei-cesarae group, malitosus is closely related to Amazonian group V, while leucocephalus is closely related to Amazonian group IV. Nevertheless, our genetic analysis could not resolve the genetic relationships among the main C. Albifrons groups. The ρ-statistic applied to the median-joining network yielded that the major part of the temporal splits estimated occurred in the Pleistocene, reinforcing the importance of the Pleistocene refugia during the evolution of C. Albifrons .