Browsing by Autor "Jorge Salazar‐Bravo"

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Altitudinal variation of species composition of small non-flying mammals in the Yungas region of Bolivia
(Asociacion Mexicana de Mastozoología A.C., 2020) Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; José E. Martínez; Susana G. Revollo-Cadima; Pavel Kindlmann
The Cotapata National Park and Natural Area for Integrated Management (PN-ANMI) is located on the eastern escarpments of the Eastern Cordillera in Bolivia. It has an altitudinal range between 1,100-5,600 masl, with five altitudinally delimited ecological zones. There is great variability of environments, which generates great animal species diversity, varying according to elevation, and in association with changes in climatic and ecological conditions. The aim of this study was to determine the pattern of richness and composition of small non-flying mammals along an altitudinal gradient in the PN-ANMI Cotapata and to evaluate responses of these species to the gradient. We worked at three different elevations: Yungas Forest (1,400 masl), Cloud Forest (2,100 masl) and Yungas Paramo (3,500 masl). Six temporary replicas were conducted. For each sampling period we run three 250 m linear transects were placed, separated by 50 m attitudinally. Each transect contained 25 sampling stations, with two snap traps. With the exception of Yungas Paramo (due to the rocky ground), we also run transects of pitfall barrier traps (five buckets, every 5 m). We captured 460 specimens corresponding to 20 species of rodents and two of marsupials. Although, species richness ( S ) and diversity ( Cinv ) were higher in Cloud Forest (intermediate elevation; S = 11, Cinv = 4.30), followed by Yungas Forest ( S = 9, Cinv = 3.47), and lower in Yungas Paramo (higher elevation; S = 8, Cinv = 2.12), only the diversity was significantly different ( H = 7.0, n = 17, P = 0.03). Species composition varied between places, showing the greatest turnover between Cloud Forest and Yungas Paramo, with a similarity of only 2 %. Yungas Paramo had the highest number of exclusive species (seven of the eight registered). The diversity was higher at medium altitude, giving a positive monoclinal hump-shaped pattern. This variation, responds to climatic influences associated with changes in vegetation, where Cloud Forest provides a greater diversity of ecological niches. The lower diversity in Yungas Paramo, and the almost total species turnover responds to inhospitable and stress conditions and to the physiological adaptations of these species to these elevations.
Anomalías reproductivas en hembras de roedores sigmodontinos colectados en el norte del departamento de La Paz (Bolivia)
(SAREM, 2021) Susana G. Revollo-Cadima; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo
This journal provides immediate open access to its content (golden open access) on the principle that making research freely available to the public supports a greater global exchange of knowledge.
Chinchilla conservation vs. gold mining in Chile
(American Association for the Advancement of Science, 2022) Jaime E. Jiménez; Amy L. Deane; Luis F. Pacheco; E. F. Pavez; Jorge Salazar‐Bravo; Pablo Valladares Faúndez
Community structure and abundance of small rodents at the wave front of agroforestry and forest in Alto Beni, Bolivia
(2020) Susana G. Revollo-Cadima; Adriana Rico C.; Luis F. Pacheco; Jorge Salazar‐Bravo
Conservation status and natural history of Ctenomys, tuco-tucos in Bolivia
(Asociacion Mexicana de Mastozoología A.C., 2021) Scott Lyell Gardner; Sebastián Botero-Cañola; Enzo Aliaga Rossel; Altangerel Tsogtsaikhan Dursahinhan; Jorge Salazar‐Bravo
The genus Ctenomys consists of about 70 species and in addition to the Geomyidae of the Nearctic, Neotropical tuco-tucos represent a well-documented case of diversification in the subterranean biotype. Here we will: i) Provide an updated summary of the natural history of the 12 species of extant tuco-tucos from Bolivia; ii) Update information on distributions of each species; and iii) Using ecological niche modeling, evaluate recent and projected habitat transformation or habitat degradation within the known range of each species to provide a preliminary assessment of the preservation or conservation status of ctenomyids within Bolivia. We follow Gardner et al. (2014) and combine species summaries with both updated published and new data to compile a complete list of known extant species of tuco-tucos from Bolivia. Occurrence data for Ctenomys in Bolivia and surrounding areas were extracted from the database Arctos and GBIF. All individual specimen-based locality records were checked and georeferenced by referring to original museum collection records. We created species distribution models for the species with enough locality records using climate and soil data, while for the rest of the species we estimated the ranges based on the known occurrence localities. Finally, we quantified the amount of large-scale habitat conversion occurring within each species range, as well as the potential effect of climatic change on species distribution. Here we present information regarding the biology of tuco-tuco ( Ctenomys ) species known to occur in Bolivia, including unpublished natural history data such as habitat association, interactions and activity patterns gathered by the authors through extensive field work. Besides this, we estimated the current distribution of Ctenomys species, quantified large-scale habitat transformation within each species range and assessed the potential effect of climatic change on five tuco-tuco species. We found that the habitats within the ranges of C. boliviensis and C. steinbachi have experienced significant land-cover conversions in recent years. We also show that C. opimus , as well as the above mentioned species are expected to undergo range contractions resulting from climatic change by 2070. Our review shows that there is a dearth of information regarding natural history, taxonomy and distribution for many Bolivian tuco-tuco species. Nonetheless, the information presented here can be a tool for directing and focusing field studies of these species. This is of great importance if we take into account that most of the Bolivian tuco-tucos are subject to one or several conservation/preservation threats. These include: Habitat destruction via land use or climatic changes in conjunction with geographic ranges of Ctenomys that are small in areal extent and which in many cases are not adequately covered by protected areas.
Data from Extreme high-elevation surveys of Andean mice
(European Organization for Nuclear Research, 2023) Jay F. Storz; Marcial Quiroga‐Carmona; Schuyler Liphardt; Naim M. Bautista; Juan C. Opazo; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; Jeffrey M. Good; Guillermo D’Elía
High-elevation mammal surveys across the Andean Cordillera and surrounding regions. Molecular sequence and low-coverage whole-genome sequencing data to confirm species identities.
Data from Extreme high-elevation surveys of Andean mice
(European Organization for Nuclear Research, 2023) Jay F. Storz; Marcial Quiroga‐Carmona; Schuyler Liphardt; Naim M. Bautista; Juan C. Opazo; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; Jeffrey M. Good; Guillermo D’Elía
High-elevation mammal surveys across the Andean Cordillera and surrounding regions. Molecular sequence and low-coverage whole-genome sequencing data to confirm species identities.
Deconstructing the high-Andean sigmodontine Abrothrix andina (Rodentia, Cricetidae): taxonomic insights from northwestern Argentinean and western Bolivian populations
(2025) Mauro N. Tammone; Erika Cuéllar Soto; Damián Voglino; José H. Urquizo; Ignacio Ferro; Agustina Murgia; Jorge Salazar‐Bravo; Adriana Rico‐Cernohorska; Ulyses F. J. Pardiñas
Abrothrix andina is traditionally regarded as a widespread Andean sigmodontine rodent, with several nominal forms described from Argentinean, Chilean, and Peruvian populations considered junior synonyms. Recent studies, however, have demonstrated that topotypes of the Argentinean nominal form Akodon gossei, are deeply divergent from the Peruvian Akodon andinus polius, challenging their proposed conspecificity. In this study, cytochrome b sequences from samples attributed to A. andina from the provinces of Jujuy (including topotypes of the nominal form Akodon jucundus), Salta, and Tucumán (Argentina), and Oruro (Bolivia) were phylogenetically analyzed. The results suggest that the sequence from Tucumán corresponds to Abrothrix gossei, while sequences from Jujuy, Salta, and Oruro cluster with those from northern Chile (referred to the nominal form Hesperomys dolichonyx) and southern Peru, constituting a clade resolved as part of Abrothrix olivacea. These findings highlight an emerging taxonomic and nomenclatural scenario. Although the definitive analysis of typical A. andina from the central Chilean Andes remains pending, the available evidence strongly supports the synonymization of the nominal forms cinnamomea, dolichonyx, jucundus, and polius under A. olivacea. Furthermore, it is likely that A. andina itself should also be included in this synonymy. Conversely, Abrothrix gossei merits recognition as a distinct species, sister to A. olivacea, with a range extending from Mendoza to, at least, Tucumán in Argentina.
Elevational variation in heart mass and suppression of hypoxia-induced right ventricle hypertrophy in Andean leaf-eared mice ( <i>Phyllotis</i> )
(2025) Naim M. Bautista; Nathanael D. Herrera; Marcial Quiroga‐Carmona; Chandrasekhar Natarajan; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; Graham R. Scott; Guillermo D’Elía; Zachary A. Cheviron; Jay F. Storz
ABSTRACT In lowland mammals that ascend to high elevation, hypoxia-induced changes in the pulmonary circulation can give rise to hypoxic pulmonary hypertension (HPH) and associated right-ventricle (RV) hypertrophy. Some mammals that are native to high elevation have evolved a means of attenuating HPH, demonstrating how environmental adaptation may sometimes counteract the effects of ancestral acclimatization responses. Here, we examine elevational variation in heart mass and measures of RV hypertrophy in four closely related species of leaf-eared mice (genus Phyllotis ) that are broadly co-distributed across a steep elevational gradient on the Western slope of the Andes. There was a positive relationship overall between heart mass and elevation that reflected proportional changes in both the right and left ventricles. Thus, elevation-related increases in overall heart mass were not generally attributable to RV hypertrophy, suggesting that this group of predominantly highland species have evolved a means of avoiding HPH and/or attenuating the cardiac response to HPH. To gain insight into possible transcriptional mechanisms, we examined patterns of transcriptomic variation in the right ventricles of Phyllotis vaccarum from two geographically distinct highland populations (both from elevations >5000 m) that exhibit strikingly different levels of RV hypertrophy. Suppression of RV hypertrophy is associated with differential expression of key regulatory genes involved in striated muscle, immune processes, and the inflammatory response. Analysis of co-expression modules identified a promising set of candidate genes for mediating the development of RV hypertrophy at extremely high elevations.
Extreme High-Elevation Mammal Surveys Reveal Unexpectedly High Upper Range Limits of Andean Mice
(University of Chicago Press, 2024) Jay F. Storz; Marcial Quiroga‐Carmona; Schuyler Liphardt; Nathanael D. Herrera; Naim M. Bautista; Juan C. Opazo; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; Jeffrey M. Good; Guillermo D’Elía
AbstractIn the world's highest mountain ranges, uncertainty about the upper elevational range limits of alpine animals represents a critical knowledge gap regarding the environmental limits of life and presents a problem for detecting range shifts in response to climate change. Here we report results of mountaineering mammal surveys in the Central Andes, which led to the discovery of multiple species of mice living at extreme elevations that far surpass previously assumed range limits for mammals. We livetrapped small mammals from ecologically diverse sites spanning >6,700 m of vertical relief, from the desert coast of northern Chile to the summits of the highest volcanoes in the Andes. We used molecular sequence data and whole-genome sequence data to confirm the identities of species that represent new elevational records and to test hypotheses regarding species limits. These discoveries contribute to a new appreciation of the environmental limits of vertebrate life.
Extreme high-elevation mammal surveys reveal unexpectedly high upper range limits of Andean mice
(2023) Jay F. Storz; Marcial Quiroga‐Carmona; Schuyler Liphardt; Naim M. Bautista; Juan C. Opazo; Adriana Rico‐Cernohorska; Jorge Salazar‐Bravo; Jeffrey M. Good; Guillermo D’Elía
In the world's highest mountain ranges, uncertainty about the upper elevational range limits of alpine animals represents a critical knowledge gap regarding the environmental limits of life and presents a problem for detecting range shifts in response to climate change. Here we report results of mountaineering mammal surveys in the Central Andes, which led to the discovery of multiple species of mice living at extreme elevations that far surpass previously assumed range limits for mammals. We live-trapped small mammals from ecologically diverse sites spanning >6700 m of vertical relief, from the desert coast of northern Chile to the summits of the highest volcanoes in the Andes. We used molecular sequence data and whole-genome sequence data to confirm the identities of species that represent new elevational records and to test hypotheses regarding species limits. These discoveries contribute to a new appreciation of the environmental limits of vertebrate life.
First record of Neogale africana (Desmarest, 1818), Amazon Weasel (Carnivora, Mustelidae), in Bolivia
(Pensoft Publishers, 2024) Nuria Bernal‐Hoverud; Daniela Morales-Moreno; Eyner Eugenio Quispe; Jorge Luis Ruíz Rojas; Omar Torrico; Robert B. Wallace; Jorge Salazar‐Bravo
Neogale africana (Desmarest, 1818), Amazon Weasel, is a poorly known South American carnivore, with records from north-central Brazil to Ecuador and south to central Peru and central Brazil. Based on two videographic records, we report the presence of this species in Bolivia and document a new elevational record. Furthermore, our new record extends the species&rsquo; distribution by 900 km from the nearest locality in Peru, and by 1500 km from the nearest Brazilian locality. Current gaps in its distribution are attributable to the low detectability and rarity of this mustelid.
FIRST RECORD OF Punomys (RODENTIA: SIGMODONTINAE) IN BOLIVIA
(2011) Jorge Salazar‐Bravo; Jacqueline Miralles-Salazar; Adriana Rico‐Cernohorska; Julieta Vargas
"We report the first known specimen of the cricetid genus Punomys for Bolivia based on an adult female captured in 1987. The specific affinities of this individual are currently unknown as it shares qualitative and quantitative characters with Punomys kofordi and P. lemminus, but also differs substantially from both species; we submit that new specimens are required to arrive to a definitive conclusion as to what species this specimen represents."
First record of Rhagomys (Mammalia: Sigmodontinae) in Bolivia
(Smithsonian Institution, 2006) Gabriela Villalpando; Julieta Vargas; Jorge Salazar‐Bravo
A recent monograph on the biological diversity of Bolivia concludes that the country is megadiverse (Ibisch and Merida, 2003); this statement is especially true for mammals. Despite being a landlocked country and representing only 6% of the geographic area of South America, Bolivia harbors the 4th mostdiverse mammalian fauna of the continent (Ceballos and Simmonetti, 2002). However, the country remains poorly explored, as reports of new taxa for science or the country have recently been published (Pacheco et al., 2004; Rios-Uzeda et al., 2004; Solmsdorff et al., 2004; Emmons and Patton, 2005). These new records and species, coupled with further advances in the taxonomy and systematics on Neotropical mammals have rendered sections of Anderson’s book Mammals of Bolivia (Anderson, 1997) obsolete in less than a decade after its publication. Accordingly, in this paper, we report a new genus and species of mammal for the fauna of Bolivia. Measurements of the animal followed Luna and Patterson (2003) except for greatest length of skull (GLS), taken to be represented by the occipito-nasal length, and CML (Condylomolar length), which was not measured because it was not defined either by Luna and Patterson (2003) or any of the references cited therein (Myers et al., 1990; Voss, 1991 or Musser et al., 1998). Rhagomys longilingua Luna and Patterson, 2003
First records of three species of Lasiurus Gray, 1831 (Chiroptera, Vespertilionidae) in Bolivia
(Pensoft Publishers, 2024) Luis H. Acosta Salvatierra; José L. Poma-Urey; Kathrin Barboza-Marquez; Kathia Rivero; José Ochoa G.; Jorge Salazar‐Bravo
Insectivorous bats of the family Vespertilionidae have been grouped into eight tribes, with Lasiurini showing an extensive distribution in South America. In Bolivia, three species of lasiurine bats have been reported: Lasiurus blossevillii (Lesson & Garnot, 1826), L. ega (Gervais, 1856), and L. villosissimus (&Eacute;. Geoffroy St.-Hilaire, 1806). The morphological analyses of specimens of this genus deposited in Bolivian scienti&#64257;c collections and comparisons with specimens from other countries (including holotypes) prompt us to report the &#64257;rst records of three species: Lasiurus atratus Handley 1996, L. castaneus Handley 1960, and L. egregius (Peters, 1870) in Bolivia, expanding their known geographic ranges to the southwestern part of the Amazon.
Identifying areas of conservation importance based on spatial patterns of evolutionary diversity for non-volant small mammals in the Andean Puna
(Elsevier BV, 2024) Susana G. Revollo-Cadima; Jorge Salazar‐Bravo
Increasing the size and coverage of protected areas will not be enough for effective biodiversity conservation
(Taylor & Francis, 2024) Luis F. Pacheco; Fausto R. Méndez‐de la Cruz; Damayanti Buchori; Jorge Salazar‐Bravo
La chinchilla de cola corta (Chinchilla chinchilla) en Bolivia: comentarios sobre localidades reportadas y bases para su conservación
(2018) Eliseo Delgado; Luis F. Pacheco; Jorge Salazar‐Bravo; Omar Rocha
Nueva especie de Peropteryx (Chiroptera: Emballonuridae) para Bolivia
(2021) José L. Poma-Urey; Luis H. Acosta; Melissa R. Ingala; Susana G. Revollo; María A. Meza; Sebastián Gutiérrez‐Cruz; Jean C. Zabala-Pedraza; Michelle Peñaranda; Jorge Salazar‐Bravo
Notas sobre Mamíferos Sudamericanos es una revista de la Sociedad Argentina para el Estudio de los Mamíferos (SAREM). Publica información acotada donde se describen nuevas localidades de registro, datos sobre comportamiento y aspectos ecológicos de mamíferos neotropicales.
Ocorrência de ectoparasitas no roedor Oligoryzomys microtis em regiões ao norte do Departamento de La Paz, Bolívia
(Federal University of Minas Gerais, 2020) M.S.C. Graça; P.A.S. Basto; Adriana Rico‐Cernohorska; J. Martinez; I.V. Sanchez-Roman; E.I. Alandia; M.I. Moya; Susana G. Revollo-Cadima; Jorge Salazar‐Bravo
RESUMO O objetivo deste trabalho foi mapear e descrever a ocorrência de roedores e seus ectoparasitas nas regiões norte do departamento de La Paz, Bolívia. De abril a maio e julho a agosto de 2017, 80 indivíduos da espécie Oligoryzomys microtis foram capturados em armadilhas vivas. Uma amostra aleatória de 36 indivíduos foi analisada quanto à presença de ectoparasitas, encontrando um total de 458 ectoparasitas. Os roedores foram capturados em dois tipos de ambientes: floresta secundária e áreas cultivadas, sendo a área cultivada a área com maior captação de roedores. Dos ectoparasitas, Laelaps sp. foi o gênero com maior abundância e Mysolaelaps sp. o mais prevalente; o gênero Polygenis sp. é aparentemente descrito pela primeira vez na selva amazônica, exigindo estudos adicionais para entender melhor os patógenos que são transmitidos no parasitismo desta pulga em roedores devido à sua importância no ecossistema e para a saúde pública.