Papers by Mario C. Lavariega
The state of Oaxaca has an extraordinarily high biological diversity which is necessary to conser... more The state of Oaxaca has an extraordinarily high biological diversity which is necessary to conserve through various means. This study presents an analysis of the richness of terrestrial mammals in Oaxaca, their endangered status and the contribution of existing conservation initiatives in the state for their protection. In Oaxaca 216 species of terrestrial mammals, belonging to 118 genera, 28 families and 11 orders have been documented. Forty-nine species are endemic to Mexico, of which 14 can only be found in Oaxaca. On the national level, 64 species are registered in the NOM-059-SEMARNAT-2010; on a worldwide level, 32 species are considered at risk according to IUCN criteria, and 10 species according to the CITES appendices. The conservation initiatives were categorized into two groups: governmental initiatives (federal and state) and non-governmental organizations. The results indicated that both types of conservation initiatives affect approximately 12% of Oaxaca’s land surface. In the state, there are 12 governmental and more than 868 protected areas. The Sierra Madre de Oaxaca sub-province has both conservation initiatives operating and represents the largest protected area of the state.
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Estado de conservación de los vertebrados terrestres de Oaxaca, México Conservation status of the... more Estado de conservación de los vertebrados terrestres de Oaxaca, México Conservation status of the terrestrial vertebrates from state of Oaxaca, Mexico wrio gF vvrieg 1 * D xtli wrtínEegldo 1 D elin qriel wonroyEqmo 2 D wiguel frionesEls 1
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El © [2016] del artículo pertenece al autor o autores; estos autorizan a la revista Arxius de Mis... more El © [2016] del artículo pertenece al autor o autores; estos autorizan a la revista Arxius de Miscel·lània Zoològica la publicación del artículo bajo la licencia de Creative Commons Reconocimiento 3.0 que permite un uso no restringido, la distribución y la reproducción en cualquier medio, siempre que se citen los autores y la revista. Abstract Amphibians and reptiles of the Sierra de Cuatro Venados, Oaxaca, Mexico.— We surveyed amphibian and reptile communities in temperate forest in the Sierra de Cuatro Venados to increase knowledge of the Oaxacan herpetofauna. We obtained 193 visual and 106 voucher records during 38 days of fieldwork. During the study, we recorded 36 of the 40 species predicted to occur in this mountain range: nine amphibians and 27 reptiles, five of which represent new records at the regional scale. Pine–oak and oak–pine forest habitats were most similar in terms of taxonomic composition (70%), and together contributed a total of 29 species (79%). Species richness was greatest in the altitudinal range 2,001-2,500 a.m.s.l. (72%) and terrestrial microhabitat (89%). Fifteen of the observed species (42%) are considered to be threatened nationally or internationally, twelve are endemic to Mexico, and one is locally endemic. The total number of reptile and amphibian species known to inhabit the Montañas y Valles del Occidente physiographic region is increased to 122.
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Huitzil, Dec 1, 2011
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Several studies have observed that bat species respond differently to landscape changes and that ... more Several studies have observed that bat species respond differently to landscape changes and that individuals tend to expand their home range when the habitat is not optimal. Tropical dry forest in the Isthmus of Tehuantepec, Mexico, shows a high habitat loss and fragmentation by anthropogenic causes. However, how bats use this fragmented landscape is unknown. Therefore, the aim of this study was to describe the temporal and spatial movements of bats fitted with radio transmitters in a fragmented region of the Isthmus of Tehuantepec. In July 2011, six bats belonging to three species were captured: an adult female of Artibeus lituratus, a juvenile female of A. jamaicensis, an adult male of Leptonycteris yerbabuenae (Family Phyllostomidae), and three adult females of Pteronotus parnellii (Family Mormoopidae) were fitted with a radio transmitter. Bats were monitored during night (18:00 to 06:00 h) from fixed stations for 17 days. The activity was obtained by quantifying the frequency of bearings in intervals of one hour. Simultaneous bearings were triangulated for locations, which were exported to a vector map where type of land use and vegetation was determined. The home range was calculated using two techniques: minimum convex polygon and fixed Kernel. A total of 75 bearings corresponding to an adult female of A. lituratus (n = 36, 48.0 %), three adults females of P. parnellii (n = 30, 40.0 %), and an adult male of L. yerbabuenae (n = 8; 10.6 %) were obtained. A juvenile female of A. jamaicensis was located on one occasion (1.3 %). Female of A. lituratus showed activity between 19:00 and 23:00 h and between 24:00 and 05:00 h, with a peak between 03:00 y 04:00 h. This bat widely used the area with preference to riparian vegetation. Based on their locations, a home range (Kernel 95 %) of 8,394 hectares and a minimum convex polygon of 2,587 hectares were estimated. The male of L. yerbabuenae showed activity only between 22:00 and 02:00 h and their locations were on agriculture land (n = 2). The observed activity of P. parnellii began at 20:00 h, it was increased to at 22:00 h (one activity peak between 01:00 and 3:00 h) and gradually declined until 06:00 h. The three females of P. parnellii were located in agricultural land (n = 4) and cultivated pasture (n = 1). The home range of A. lituratus observed in the present study is the largest reported for phyllostomid bats, possibly in response to landscape condition. Activity and locations of three females of P. parnellii and a male of L. yerbabuenae suggest that they occasionally use the study area in their way to more productive areas. Se ha observado que las especies de murciélagos responden de manera diferencial a los cambios en el paisaje y que los individuos tienden a ampliar su ámbito hogareño cuando el hábitat no es óptimo. Las selvas secas de la Planicie costera del Istmo de Tehuantepec, en México, presentan una alta pérdida y fragmentación por causas humanas. Sin embargo, se desconoce cómo los murciélagos usan este paisaje fragmentado. Por lo anterior, el objetivo de este estudio fue describir por primera vez los movimientos temporales y espaciales de murciélagos equipados con radio-transmisores en una zona fragmentada del Istmo de Tehuantepec. En julio de 2011 se capturaron seis murciélagos de tres especies: una hembra adulta de Artibeus lituratus, una hembra joven de A. jamaicensis, un macho adulto de Leptonycteris yerbabuenae (Familia Phyllostomidae) y tres hembras adultas de Pteronotus parnellii (Familia Mormoopidae), a los que se les adhirió un radio-transmisor. Durante 17 días de estudio, los murciélagos se buscaron a lo largo de la noche (18:00 a 06:00 h) desde estaciones fijas. La actividad se obtuvo al cuantificar la frecuencia de lecturas del rumbo en intervalos de una hora. Las lecturas de rumbo simultáneas fueron trianguladas para obtener puntos geográficos, mismos que se exportaron a un mapa vectorial en donde se determinó la cobertura de uso de suelo y vegetación. El área del ámbito hogareño se calculó mediante dos técnicas: polígono mínimo convexo y Kernel fijo. Se obtuvieron un total de 75 lecturas del rumbo, correspondientes a una hembra adulta de A. lituratus (n = 36, 48.0 %), tres hembras adultas de P. parnellii (n = 30; 40.0 %) y un macho adulto de L. yerbabuenae (n = 8; 10.6 %). Una hembra joven de A. jamaicensis se localizó en una
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The tropical dry forests of Mexico are one of the world's biodiversity hotspots. To contribute to... more The tropical dry forests of Mexico are one of the world's biodiversity hotspots. To contribute to the knowledge of mammal diversity and conservation of the central coast of Oaxaca State, southern Mexico, we conducted field surveys in the area. Additional information was obtained from literature and museum databases. In order to compare the taxonomic similitude between areas along the Planicie Costera del Pacífico province we performed a taxonomic similarity analysis using data from the literature and the present study. A total of 49 species of mammals belonging to 19 families and eight orders were recorded. The maximum number of species was recorded in deciduous forest (n = 46), followed by semideciduous forest (n = 11). The similarity index was low (<50%) between areas along the Planicie costera del Pacífico, indicating higher species turnover. The high mammal diversity, the presence of endemic (8%), threatened species (16%), and voluntary conservation areas highlight the importance of this region.
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Resumen En este trabajo reportamos las especies de aves presentes en la Sierra de Cuatro Venados,... more Resumen En este trabajo reportamos las especies de aves presentes en la Sierra de Cuatro Venados, centro-occidente de Oaxaca, México; las registramos mediante redes de niebla, búsqueda intensiva y revisión de literatura. Fueron 160 especies (38 familias y 12 órdenes), mismas que representan 21.5% de las especies reportadas para Oaxaca. Los registros de cinco especies representan un incremento en su distribución geográfica para las montañas del centro de Oaxaca. Del total de especies, el orden Passeriformes representó 67.5% de la riqueza específica y las familias Parulidae (10.6%) y Emberizidae (10.6%) fueron las más diversas. Alre-dedor de 85.0% de las especies son residentes y 13.7% corresponde a visitantes de invierno. Registramos 24 aves endémicas o cuasiendémicas a México y 13 especies protegidas por la legislación mexicana. La Sierra de Cuatro Venados posee una avifauna particular compuesta principalmente por especies afines a las montañas de las vertientes oceánicas del Atlántico y del Pacífico (41.2%) y de especies distribuidas ampliamente en el sur de México (36.9%). La importancia de la Sierra de Cuatro Venados radica en su posición como corredor de ambientes templados que conectan a las avifaunas del norte y sur de Oaxaca. Abstract In this work we report the bird species inhabiting the Sierra de Cuatro Venados, central-occidental Oaxaca, Mexico. We recorded the species through mist-netting, intensive search and literature review. We recorded 160 species (38 families and 12 orders), which represents 21.5% of the bird species reported for Oaxaca. Five species records represent increases in range extension within the central Oaxacan mountains. Passeriformes represented 67.5% of bird species richness, while the most diverse families were Parulidae (10.6%) and Emberizidae (10.6%). Approximately 85.0% of recorded species were residents and 13.7% were winter visitors. We recorded 24 endemic or cuasiendemic species to Mexico, and 13 were considered conservation concern. The avi-fauna of Sierra de Cuatro Venados mainly consists of montane species associated to the Atlantic and Pacific slopes (41.2%) and those with a wide distribution in southern Mexico (36.9%). The importance of the Sierra de Cuatro Venados lies in its geographic position and climate, providing a corridor of temperate habitats connecting the avifaunas of northern and southern Oaxaca.
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Revista Mexicana de Biodiversidad, 2015
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Resumen. Se dan a conocer registros nuevos de Abronia mixteca en el estado de Oaxaca, México. Los... more Resumen. Se dan a conocer registros nuevos de Abronia mixteca en el estado de Oaxaca, México. Los organismos fueron encontrados en bosque de pino, pino-encino y encino-pino en 5 localidades en la subprovincia fisiográfica Montañas y Valles del Occidente de Oaxaca. Estos registros incrementan el conocimiento del área de distribución, rango altitudinal y hábitat de A. mixteca. Palabras clave: Abronia mixteca, lagarto alicante mixteco, distribución, intervalo altitudinal, tipos de vegetación. Abstract. We present new records of Abronia mixteca in the Mexican state of Oaxaca. The organisms were found in pine forest, pine-oak forest, and oak-pine forest from 5 localities in the physiographic subprovince of Mountains and Valleys of Western Oaxaca. These records increase the distribution area of A. mixteca known to date.
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Resumen. Se dan a conocer registros nuevos de Abronia mixteca en el estado de Oaxaca, México. Los... more Resumen. Se dan a conocer registros nuevos de Abronia mixteca en el estado de Oaxaca, México. Los organismos fueron encontrados en bosque de pino, pino-encino y encino-pino en 5 localidades en la subprovincia fisiográfica Montañas y Valles del Occidente de Oaxaca. Estos registros incrementan el conocimiento del área de distribución, rango altitudinal y hábitat de A. mixteca. Palabras clave: Abronia mixteca, lagarto alicante mixteco, distribución, intervalo altitudinal, tipos de vegetación. Abstract. We present new records of Abronia mixteca in the Mexican state of Oaxaca. The organisms were found in pine forest, pine-oak forest, and oak-pine forest from 5 localities in the physiographic subprovince of Mountains and Valleys of Western Oaxaca. These records increase the distribution area of A. mixteca known to date.
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Revista Mexicana de …, Jan 1, 2012
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Papers by Mario C. Lavariega