Términos relacionados

14 resultados encontrados para: AUTOR: Pérez Flores, Jonathan Sechaly
  • «
  • 1 de 2
  • »
1.
Artículo
First molecular characterization of Linguatula recurvata (Pentastomida) and first record in Baird's Tapir (Tapirus bairdii) from Calakmul, Mexico
Pérez Flores, Jonathan Sechaly (autor) ; Lagunas Calvo, Omar (autor) ; González Solís, David (autor) ; Oceguera Figueroa, Alejandro (autor) ;
Disponible en línea
Contenido en: Comparative Parasitology Volumen 86, número 2 (2019), páginas 135-141 ISSN: 1525-2647
PDF
Resumen en: Inglés |
Resumen en inglés

The genus Linguatula (Pentastomida) is cosmopolitan and includes 6 species that have a higher prevalence in subtropical, tropical, and temperate regions. Larvae (nymphs) of Linguatula spp. require an intermediate host (herbivorous), while the adult worms inhabit the respiratory tract of wild and domestic carnivores. During an ongoing project on conservation biology of Baird’s tapir (Tapirus bairdii), 3 pentastome nymphs were found parasitizing the liver, mesentery, and small intestine of an adult male from the region of Calakmul, Campeche, Mexico. Based on morphological and molecular data, these specimens correspond to Linguatula recurvata. Here, we present the first record of a linguatulid parasitizing a Tapirus sp., and only the second of a pentastomid in tapirs. In addition, this work includes for the first time sequences of the mitochondrial cytochrome c oxidase subunit I of L. recurvata.


2.
- Artículo con arbitraje
Opportunistic predation by leaf-Cutting Ants (Hymenoptera: Formicidae) on a Wounded Baird's Tapir (Mammalia: Perissodactyla: Tapiridae) in Mexico
Lachaud, Jean Paul (autor) ; Pérez Flores, Jonathan Sechaly (autor) ; Pérez Lachaud, Gabriela (autora) ;
Disponible en línea
Contenido en: Florida Entomologist Vol. 102, no. 1 (April 2019), p. 251-253 ISSN: 0015-4040
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

A pesar de su dieta herbívora especializada, las hormigas cortadoras de hojas aprovechan también de manera oportunística fuentes temporales como carcasas de insectos o de vertebrados. Reportamos el primer caso de hormiga atine, Atta cephalotes (L.) (Hymenoptera: Formicidae), forrajeando sobre el tejido cicatricial de un vertebrado vivo, una hembra herida del tapir centroamericano, Tapirus bairdii (Gill) (Mammalia: Perissodactyla: Tapiridae). Se proponen 2 hipótesis, no mutuamente exclusivas, para explicar tal comportamiento: (1) el uso por parte de las hormigas cortadoras de hojas de estos tejidos como fuente de nutrientes esenciales escasos; (2) el muestreo oportunístico de comunidades polimicrobianas asociadas con la piel de animales heridos, en búsqueda de nuevas cepas de sus actinobacterias asociadas.

Resumen en inglés

Notwithstanding their specialized herbivorous diet, leaf-cutting ants opportunistically exploit temporary resources such as insect or vertebrate carcasses. We report on the first case of attine workers, Atta cephalotes (L.) (Hymenoptera: Formicidae), foraging on the scar tissues of a living vertebrate, a wounded female Baird’s tapir, Tapirus bairdii (Gill) (Mammalia: Perissodactyla: Tapiridae). We put forward 2, not mutually exclusive, hypotheses to explain such behavior: (1) utilization by the leaf-cutting ants of these tissues as a resource that provides rare essential nutrients, and (2) opportunistic sampling of polymicrobial communities associated with the skin of the wounded animal in search of new strains of their associated actinobacteria.


3.
Artículo - Nota científica con arbitraje
First record of the spinose ear tick (Otobius megnini) on the Baird’s tapir
Pérez Flores, Jonathan Sechaly ; González Solís, David (coaut.) ;
Contenido en: International Journal of Acarology Vol. 44, no. 4-5 (July 2018), p. 189-191 ISSN: 0164-7954
PDF
Resumen en: Inglés |
Resumen en inglés

Otobius megnini is a cosmopolitan soft tick that parasitizes humans, as well as domestic and wild mammals. The larval and nymphal stages are commonly parasites and feed on the ear canal, while the adult stage (non-parasitic) is free-living. Eight nymphs of different sizes and stages were collected from the ears of an adult Baird’s tapir (Tapirus bairdii) from Quintana Roo, Mexico. This is the first report of O. megnini parasitizing a species of the genus Tapirus. The presence of O. megnini in the most touristic region of Mexico is of sanitary importance, since it is a potential vector of zoonotic diseases (Q and spotted fevers) and increases the risk of infection in people in close contact with wild and domestic mammals or practising outdoor activities.


4.
- Artículo con arbitraje
Predation of an adult female Morelet’s crocodile (Crocodylus moreletii) by a jaguar (Panthera onca) in the Calakmul Region, Mexico
Pérez Flores, Jonathan Sechaly ;
Contenido en: Herpetology Notes Vol. 11 (August 2018), p. 613-616 ISSN: 2071-5773
PDF

5.
Artículo
*Solicítelo con su bibliotecario/a
Evidence for wild crocodiles as a risk for human Leptospirosis, Mexico
Pérez Flores, Jonathan Sechaly (coaut.) ; Charruau, Pierre Alexandre Rémy Robert (coaut.) ; Cedeño-Vázquez, J.R. (coaut.) ; Atilano, Daniel (coaut.) ;
Contenido en: EcoHealth Vol. 14, no. 1 (March 2017), p. 58–68 ISSN: 1612-9210
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Sentinel species such as crocodilians are used to monitor the health of ecosystems. However, few studies have documented the presence of zoonotic diseases in wild populations of these reptiles. Herein we analyzed 48 serum samples from Crocodylus acutus (n = 34) and C. moreletii (n = 14) from different sites in the state of Quintana Roo (Mexico) to detect antibodies to Leptospira interrogans by means of a microscopic agglutination test (MAT). Crocodylus acutus and C. moreletii tested positive to 11 and 9 serovars, respectively, with Grippotyphosa being the serovar with the highest prevalence in Cozumel island (100%), Banco Chinchorro Biosphere Reserve (70.6%), and Río Hondo (100%), while in Chichankanab Lake, it was Bratislava (75%). Titers ranged from 1:50 to 1:3200, and the most frequent was 1:50 in all study sites. Leptospira is present in fresh and saltwater individuals due to the resistance of the bacterium in both environments. Cases of infected people involved with crocodile handling and egg collection suggest that these reptiles could play an important role in the transmission of leptospirosis. Preventive medicine programs should consider the monitoring of reptiles, and testing the soil and water, to prevent outbreaks of leptospirosis in facilities containing crocodiles.


6.
Artículo
*Solicítelo con su bibliotecario/a
Skin parasitism by Paratrichosoma recurvum in wild American crocodiles and its relation to environmental and biological factors
Charruau, Pierre Alexandre Rémy Robert (autor) ; Pérez Flores, Jonathan Sechaly (autor) ; Labarre, Didier (autor) ;
Contenido en: Vol. 122, no. 3 (January 2017), p. 205-211 ISSN: 0177-5103
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Paratrichosma spp. are capillarid worms that parasitize the abdominal skin of crocodiles. They are likely not a threat to crocodiles' health, but they affect the skins' commercial value. No successful treatment exists against this parasite, and present knowledge of its life cycle is limited. Herein we report new information on Paratrichosoma recurvum occurrence in wild American crocodiles Crocodylus acutus from Mexican Caribbean islands and its relation to environmental (water salinity, temperature, climatic events) and biological (body condition) factors. The percentage of parasitized crocodiles (30.3%) is among the highest recorded in wild crocodilian populations. Small (<40.8 cm total length [TL]) and large (>270 cm TL) crocodiles are less parasitized, probably due to the characteristics of their skin or of the parasite life cycle. Two individuals appeared to have eliminated worms naturally between their capture and recapture. The thorax-abdomen is the most parasitized area of the body of crocodiles. The risk of infection is not associated with the sex of the crocodile, but there was a difference in the proportion of parasitized crocodiles between sites, which could be related to different environmental conditions. The body condition of a crocodile does not seem to be affected by the parasite. Climatic events and water temperature show no effect on the parasitism of crocodiles, but salinity could have an effect. The infection of crocodiles by P. recurvum could depend more on an individual's behavior than on environmental conditions.


7.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
From the worm in a bottle of Mezcal: iDNA confirmation of a leech parasitizing the Antillean manatee
Pérez Flores, Jonathan Sechaly ; Rueda Calderon, H. (coaut.) ; Kvist, S. (coaut.) ; Siddall, M.E. (coaut.) ; Oceguera Figueroa, Alejandro (coaut.) ;
Contenido en: Journal of Parasitology Vol. 102, no. 5 (Oct. 2016), p. 553-555 ISSN: 1937-2345
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Invertebrate-derived ingested DNA (iDNA) is quickly proving to be a valuable, non-invasive tool for monitoring vertebrate species of conservation concern. Using the DNA barcoding locus, we successfully identified both the blood-feeding leech Haementeria acuecueyetzin and its blood meal-the latter is shown to be derived from the Caribbean manatee, Trichechus manatus . DNA amplification was successful despite the fact that the specimen was fixed in Mezcal (a beverage distilled from agave). We report the first confirmed case of a leech feeding on a manatee, the first record of H. acuecueyetzin for the State of Chiapas and, to our knowledge, the first case of successful DNA amplification of a biological sample fixed in Mezcal other than the caterpillar "worms" more commonly found in that beverage.


8.
- Artículo con arbitraje
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

Reportamos estimaciones del tamaño del ámbito hogareño de un individuo de tapir de Baird (Tapirus bairdii) en la Reserva de la Biósfera de Calakmul desde el 7 de mayo del 2011 hasta septiembre del 2015. El tapir fue capturado en una “aguada” dentro de la reserva y se le puso un collar de radiotelemetría VHF que funcionó solo unas semanas. Con ayuda de una red de cámaras trampas instaladas en cuerpos de agua hemos monitoreado movimientos de éste individuo por cuatro años y medio. Estimamos el ámbito hogareño a través del método del Polígono mínimo convexo y construyendo una área buffer alrededor de los sitios donde ha sido foto-capturado. Con los pocos registros obtenidos (< 30), pero que se extienden durante cuatro años y medio y utilizando el Polígono mínimo convexo y considerando todos los registros desde que este individuo fue capturado, estimamos un ámbito hogareño de 23.9 km2. Cuando construimos un buffer alrededor de dichos puntos estimamos un ámbito hogareño de 39.9 km2 con un área núcleo de 4.1 km2. La distancia máxima de dispersión fue de 10.5 km desde su ubicación original. Los ámbitos hogareños estimados en esta investigación son más grandes que los reportados para esta especie en otros estudios. Este es el primer reporte de ámbitos hogareños, capacidad de movimientos y distancias de desplazamiento para el tapir de Baird en México.

Resumen en inglés

We report home range estimates of an individual Baird’s tapir (Tapirus bairdii) recorded from May 7, 2011 to September 2015 at the Calakmul Biosphere Reserve in Southern Mexico. The tapir was captured and equipped with a VHF collar in a pond within the reserve. The signal failed to transmit in the following month but with the help of a network of camera traps deployed in nearby water bodies we monitored this individual during four years and a half. We have estimated home range by the Minimum convex polygon method and also by constructing a buffer around camera traps locations where this animal was photo-captured. With few available records (<30) but spanned over four years the Minimum convex polygon estimate for all locations resulted in 23.9 km2. When we constructed a buffer around camera trap locations we estimated a home range of 39.9 km2 with a core area of 4.1 km2. Maximum distance dispersed from this tapir was 10.5 km from its original location. The home range estimates reported here are larger than previously reported for this species. This is the first report on the home range, travel capacity, and distances for the Baird’s tapir in the Calakmul Region.


9.
Artículo - Nota científica con arbitraje
PDF
Resumen en: Inglés |
Resumen en inglés

Ticks are common ectoparasites of amphibians and reptiles but very few reports of such parasites on crocodylians exist worldwide. Herein, we report the first detailed observations of Amblyomma dissimile Koch, 1844 on the 3 crocodylian species present in Mexico, with the first report of tick parasitism on Crocodylus acutus and the second on Caiman crocodilus chiapasius. This is also the first report of A. dissimile in the state of Quintana Roo. Proportions of infested individuals found in this study ranged from 0.51 to 1.96%, suggesting that tick parasitism in crocodylians is likely opportunistic and occurs when individuals leave the water for terrestrial activities. Tick parasitism does not represent a major threat to crocodylians. The increasing habitat destruction/fragmentation and cattle expansion in southeastern Mexico, however, could increase tick populations and trigger tick parasitism and tick-borne diseases in herpetofauna and other vertebrates, including humans. Thus, studies are needed to better understand these relationships.


10.
- Artículo con arbitraje
Scoring body condition in wild baird’s tapir (Tapirus bairdii) using camera traps and opportunistic photographic material
Pérez Flores, Jonathan Sechaly ; Calmé, Sophie (coaut.) ; Reyna Hurtado, Rafael Ángel (coaut.) ;
Contenido en: Tropical Conservation Science Vol. 9, no. 4 (October-December 2016), p. 1-12 ISSN: 1940-0829
PDF PDF
Resumen en: Inglés |
Resumen en inglés

Body condition score (BCS) systems have been used in wild animals as a technique for evaluating the health status of species that are difficult to capture but can be observed in their habitat. In this study, our goal was to enable scoring the BC of wild Baird’s tapir (Tapirus bairdii) without the need for direct observation, using camera trap and opportunistic photographic records. First, we modified a BCS assessment that was created for other tapir species, using captive Baird’s tapirs. Second, we applied it to a set of photographs of wild Baird’s tapir that were obtained over six consecutive years in a protected area in southern Mexico. We compared morphometric measurements and muscle and fat deposited in several anatomical regions. We also evaluated changes in BC between seasons for individuals photographed on several occasions. We show that neck and thorax circumferences are significantly correlated with all BCSs associated with these anatomical regions, whereas abdominal circumference is correlated only with half of the BCS. BCS of captive tapirs that we evaluated averaged 24.93±5.61, which was higher than that of wild tapirs (22.63±3.68). No significant difference in BC was apparent between rainy and dry seasons in our study site; wild tapirs were able to maintain good BC throughout the year. Camera trap records and opportunistic photographs were a useful tool to track changes in BC over time.