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8 resultados encontrados para: AUTOR: Barriga Sosa, Irene de los Ángeles
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Resumen en: Inglés |
Resumen en inglés

The common octopus of the Veracruz Reef System (VRS, southwestern Gulf of Mexico) has historically been considered as Octopus vulgaris, and yet, to date, no study including both morphological and genetic data has tested that assumption. To assess this matter, 52 octopuses were sampled in different reefs within the VRS to determine the taxonomic identity of this commercially valuable species using an integrative taxonomic approach through both morphological and genetic analyses. Morphological and genetic data confirmed that the common octopus of the VRS is not O. vulgarisand determined that it is, in fact, the recently described O. insularis. Morphological measurements, counts, indices, and other characteristics such as specific colour patterns, closely matched what had been reported for O. insularis in Brazil. In addition, sequences from cytochrome oxidase I (COI) and 16S ribosomal RNA (r16S) mitochondrial genes confirmed that the common octopus from the VRS is in the same highly supported clade as O. insularisfrom Brazil. Genetic distances of both mitochondrial genes as well as of cytochrome oxidase subunit III (COIII) and novel nuclear rhodopsin sequences for the species, also confirmed this finding (0–0.8%). We discuss our findings in the light of the recent reports of octopus species misidentifications involving the members of the ‘O. vulgaris species complex’ and underscore the need for more morphological studies regarding this group to properly address the management of these commercially valuable and similar taxa.


2.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
A molecular approach to understand the riddle of the invasive success of the tarantula, Brachypelma vagans, on Cozumel Island, Mexico
Machkour M'Rabet, Salima ; Vilchis Nestor, Claudia Andrea (coaut.) ; Barriga Sosa, Irene de los Ángeles (coaut.) ; Legal, Luc (coaut.) ; Hénaut, Yann (coaut.) ;
Contenido en: Biochemical Systematics and Ecology Vol. 70 (February 2017), p. 260–267 ISSN: 0305-1978
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Invasive populations typically demonstrate genetic isolation which results in a loss of genetic diversity and a reduction in invasion success. This study focused on the genetic population of a successful invasive species of tarantula. Individuals were sampled in two mainland localities of the Yucatan Peninsula (Zoh-Laguna and Raudales), in addition to two island localities (El Cedral and Rancho Guadalupe on Cozumel Island). All populations present high genetic diversity (mean: He = 0.23, P = 99%), with significant differences between the Raudales and Rancho Guadalupe localities. The AMOVA analysis revealed a significant population structure (14.5% variation among populations), consistent with the gene differentiation coefficient (GST = 0.21), and spatial analysis of population structure. Our results suggested that the original introduced population did not suffer a loss of genetic diversity during establishment on the island, possibly a result of different biological conditions. Population structure analysis leads us to suggest that one island population is similar to the original genetic profile, whereas the genotypic profile of the other island population reflects recent introductions from the mainland. We identified a potential risk of extinction for one local mainland population, suggesting that this species may be a successful invader in a new environment but endangered in some parts of its natural area.


3.
Artículo
Genetic evidence of the presence of Octopus mimus in the artisanal fisheries of octopus in Santa Elena Peninsula, Ecuador
Pliego Cárdenas, Ricardo ; Flores, Luis (coaut.) ; Markaida Aburto, Unai (coaut.) ; Barriga Sosa, Irene de los Ángeles (coaut.) ; Mora, Elba (coaut.) ; Arias, Evelyn (coaut.) ;
Contenido en: American Malacological Bulletin Vol. 34, no. 1 (June 2016), p. 51-55 ISSN: 2162-2698
Resumen en: Inglés |
Resumen en inglés

The geographic distribution of Octopus mimus Gould, 1852 is unclear, as most records are restricted to coastal localities of Peru and Chile, and some references have mentioned its presence off Central America. It is unknown whether this octopus is found off Ecuador as two previous unpublished records have suggested. The aim of the present study is to identify genetically the main octopus captured in a marine protected area known as Reserva de Produccion Faunistica Marino-Costera Puntilla de Santa Elena (REMACOPSE) off the Santa Elena peninsula, Ecuador. Samples collected from the local fishery were used to test the presence of this species based on the sequences of three mitochondrial markers and using a Bayesian approach. The phylogenetic analysis confirms that O. mimus inhabits the REMACOPSE. The results also indicate that the octopus specimens captured in the fishery from this marine protected area, are more closely related to O. mimus specimens from Central America than those from South America. The genetic identification of two groups of O. mimus could be associated with the different marine environmental conditions of the two biogeographic provinces. The finding in this study represents an important step for posterior research on the biology and fishery of octopus in Ecuador.


4.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

The introduction of species into new ecosystems, especially in small and isolated regions such as islands, offers an excellent opportunity to answer questions of the evolutionary processes occurring in natural conditions on a scale that could never be achieved in laboratory conditions. In this study, we examined the Mexican red rump tarantula Brachypelma vagans Ausserer (Mygalomorphae: Theraphosidae), a species that was introduced to Cozumel Island, Mexico, 40 years ago. This introduction provides an exceptional model to study effects such as morphological variation between island populations and those on the mainland in open habitats facing the island. Intraspecific variation related to the color polymorphism was compared. The aim of this study was to determine the phenotypic differences between continental populations of B. vagans and the introduced population on Cozumel Island. Phenotypic difference was evaluated using two approaches: 1) comparison of the morphometric measurements of adult and juvenile individuals at the local scale and between continental and island populations, and 2) comparison of individual color polymorphism between mainland and island populations. Two locations were sampled within the continental part of the Yucatan peninsula and two on the island of Cozumel. The number of samples analyzed at each site was 30 individuals. The morphometric results showed significant differences between continental and island populations, with bigger individuals on the island. In addition, three new variations of the typical color pattern of B. vagans recorded so far were observed. This study opens the door to further investigations to elucidate the origin of the phenotypic variation of the isolated individuals on Cozumel Island. Also, the widest range of color morphs found for a tarantula species is reported.


5.
- Artículo con arbitraje
Potential distributional patterns of three wild ungulate species in a fragmented tropical region of northeastern Mexico
Vilchis Nestor, Claudia Andrea ; Machkour M'Rabet, Salima (coaut.) ; Barriga Sosa, Irene de los Ángeles (coaut.) ; Winterton, Peter (coaut.) ; Hénaut, Yann (coaut.) ;
Contenido en: Tropical Conservation Science Vol. 6, no. 4 (September 2013), p. 539-557 ISSN: 1940-0829
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Resumen en: Español | Inglés |
Resumen en español

Se analizaron los patrones de distribución potencial de tres especies nativas de ungulados: Odocoileus virginianus, Mazama temama y Pecari tajacu, en el bosque tropical más septentrional de América en el este de México, en respuesta a diferentes variables físicas, climáticas, biológicas y antropogénicas, para identificar factores ambientales relacionados con su distribución potencial y áreas potenciales clave para la conservación de ungulados. Se obtuvieron registros actuales de presencia para cada especie y se construyeron modelos de distribución potencial utilizando el modelo de nicho ecológico de máxima entropía. Las superficies de adecuabilidad del modelo fueron utilizadas para calcular el hábitat potencial remanente en la región, así como el área potencial de simpatría y la representatividad de éstas en Áreas Naturales Protegidas. Las variables biológicas y antropogénicas predijeron mejor la distribución para las tres especies. La composición del paisaje (proporción de diferentes clases de uso del suelo: bosque, agricultura, agostadero) en un área aproximada de 120 ha, fue la variable más importante para todos los modelos, influyendo diferente a cada especie en relación a la tolerancia de éstas a hábitats alterados. El área potencial remanente para las tres especies parece estar fragmentada y casi eliminada en las áreas de planicie (<14% remanente).

Los modelos de distribución nos permitieron detectar una superficie importante en la parte occidental del área de estudio que posiblemente podría funcionar como un gran corredor biológico que promueve la conectividad en la provincia mastgeográfica de la Sierra Madre Oriental en una región altamente transformada por cambios de uso de suelo. Bajo este contexto de transformación de hábitat, el manejo enfocado a fomentar una matriz de calidad a nivel de paisaje, promete ser una alternativa viable para la conservación de ungulados en regiones tropicales de México.

Resumen en inglés

In the northernmost American tropical forests of eastern Mexico, we analyzed the potential distribution of three ungulate species, Odocoileus virginianus, Mazama temama and Pecari tajacu, in response to several physical, climatic, biological, and anthropogenic variables, in order to identify environmental factors affecting distribution and potential key areas for ungulate conservation. Current presence records for these species were gathered, and potential distribution models were built using Maximum Entropy niche modeling (MaxEnt). Model suitability surfaces were used to calculate remaining potential habitat areas in the region, as well as the potential sympatric area and representation of these areas in Natural Protected Areas. Biological and anthropogenic variables were the best species distribution predictors. Landscape composition (the proportion of different land-use and land-cover classes: forest, agriculture, and pasture) within approximately 120 ha, was the most important variable for all models, influencing each species differently with respect to their tolerance of altered habitats. The remaining potential area of all three species is fragmented and has apparently been nearly lost in plains (<14% remaining). Distribution models allowed us to detect an important location in the western portion of our study area which may function as a large biological corridor in the Sierra Madre Oriental mastogeographic province, a region heavily transformed by land use change. In the context of habitat transformation, management promoting quality matrix at the landscape level promises to be a viable alternative for ungulate conservation in tropical regions of Mexico.


6.
Tesis - Maestría
Efecto del aislamiento de poblaciones de Brachypelma vagans: estudio molecular y morfométrico / Claudia Andrea Vilchis Nestor
Vilchis Nestor, Claudia Andrea ; Hénaut, Yann (tutor) ; Machkour M'Rabet, Salima (directora) ; Torrescano Valle, Nuria (asesora) ; Barriga Sosa, Irene de los Ángeles (asesora) ;
Chetumal, Quintana Roo, México : El Colegio de la Frontera Sur , 2012
Clasificación: TE/595.44097267 / V5
Cerrar
SIBE Campeche
ECO040004657 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Chetumal
ECO030007524 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010009113 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020012569 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Villahermosa
ECO050005006 (Disponible)
Disponibles para prestamo: 1
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Índice

Capítulo I Introducción
Brachypelma vagans, modelo de estudio
Planteamiento del problema
Justificación
Objetivo General
Objetivos específicos
Capítulo II Artículo Sometido
Estudio morfométrico
Journal of Insect Science on Line Submissions System #2690
Summary
Abstract
List of abbreviations
Introduction
Materials and Methods
Results
Discussion
Acknowledgements
References
Capítulo III Estudio Genético
Introducción
Hipótesis
Materiales y métodos
Resultados
Discusión
Conclusiones
Capítulo IV Conclusiones Generales
Literatura Citada
Anexos
Glosario
Formato de Caracterización de los Sitios de Muestreo
Parámetros de Diversidad y Diferenciación Genética
Fuerzas Evolutivas que Modifican las Frecuencias Alélicas/Genotípicas de los Individuos en una Población
Normas Editoriales


7.
Artículo
*En hemeroteca, SIBE-Chetumal
Genetic identity and diversity of Procambarus Llamasi (Decapoda, Astacidae, Cambarinae) from the Yucatan Peninsula, Mexico
Barriga Sosa, Irene de los Ángeles (autor) ; Rodríguez Serna, Miguel (autor) ; Carmona Osalde, Claudia (autora) ; Gárnica Rivera, C. (coaut.) ; Acuña Gómez, P. (coaut.) ; Arredondo Figueroa, José Luis (autor) ;
Contenido en: Crustaceana Vol. 83, no. 9 (September 2010), p. 1035-1053 ISSN: 0011-216X
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
50142-10 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal
Resumen en: Español | Inglés |
Resumen en español

Se han reportado dos especies de cambáridos para la Península de Yucatán, Procambarus llamasi y P. pilosimanus, éste ultimo con una distribución que va del sur de Veracruz al sur de Campeche. Sin embargo, durante la última década solo se ha registrado la presencia de P. llamasi. Además y debido al aislamiento de la Laguna de Chichancanab, en el presente trabajo se investigan a nivel molecular a dos poblaciones sureñas, Procambarus sp. de la Laguna de Chichancanab, Quintana Roo (LCh) y Procambarus llamasi de Ignacio Zaragoza, Campeche (IZa), para determinar sí son unidades genéticas independientes. Se evalúan y contrastan los niveles de heterogeneidad de las subunidades mitocondriales r16S y citocromo oxidasa I (CO-I) con relación a las del cambarelinido Cambarellus montezumae de los Canales de Xochimilco, D.F. (XCh). Se investigan las relaciones filogenéticas de éstas poblaciones en relación a especies de astacoideos Neárticos y Neotropicales (Astacidae y Cambaridae) y de atyidos caribeños (Atyidae). Los niveles de diversidad genética (h and π) para r16S y CO-I fueron más bajas en las poblaciones sureñas en relación al cambarelinido del centro de México. Por ejemplo, π varió de 0,00000 a 0,00149 para r16S y CO-I, respectivamente, para las poblaciones sureñas, mientras que para la población central los valores variaron entre 0,00250 y 0,00232 para las mismas regiones. Ambas regiones génicas mostraron niveles significativos de estructuración entre las poblaciones sureñas (FST, 0,714 y 0,612, P < 0,0001, para r16S y CO-I), resultados que son apoyados por los bajos niveles de flujo génico, sin embargo un mayor número de poblaciones a lo largo de la distribución de la especie deberán ser muestreadas para corroborar dicha hipótesis.

La reconstrucción filogenética de estas poblaciones y otros astacoideos y atyidos y por medio de máxima parsimonia (MP), mínima evolución (ME) y máxima verosimilitud (ML) confirman la monofilia de las dos poblaciones sureñas (P. llamasi), así como la de C. montezumae y sugieren que la familia Cambaridae es un ensamble no-monofilético, hipótesis que se confirma con un análisis Bayesiano de evidencia total.

Resumen en inglés

Two species of cambarids have been reported for the Yucatan Peninsula, Procambarus llamasi and P. pilosimanus, the latter with a distribution that stretches from the south of Veracruz to the south of Campeche. However, during the last decade only the presence of P. llamasi has been reported; as a consequence, and also because of the biogeographic isolation of the Laguna de Chichancanab, we here investigated two southern populations, Procambarus sp. from Laguna de Chichancanab, Quintana Roo (LCh) and Procambarus llamasi from Ignacio Zaragoza, Campeche (IZa). We investigated these at the molecular level in order to determine if they are independent genetic units. The levels of genetic heterogeneity of the mitochondrial r16S and subunit I of the cytochrome oxidase (CO-I) genes are thus evaluated and contrasted to the levels of the cambarellinid, Cambarellus montezumae from the Xochimilco Channels, D.F. (XCh). The phylogenetic relations of these populations in relation to other Neartic and Neotropical astacoids (Astacidae and Cambaridae) and Caribbean atyids (Atyidae) were investigated. Levels of genetic diversity (h and π) in both r16S and CO-I were lower in the southeastern populations in relation to the Cambarellinae from central Mexico. For instance, π ranged from 0.00000 to 0.00149 for r16S and CO-I, respectively, in the southeastern populations, whereas the central population showed levels that ranged from 0.00250 to 0.00232 for the same gene regions. Both gene regions indicate significant levels of structuring among the southeastern populations (FST, 0.714 and 0.612, P < 0.0001, for r16S and CO-I), and these results are supported by the lack of actual gene flow. However, in order to confirm this hypothesis a larger number of populations along the range of distribution of the species should be tested.

The phylogenetic reconstruction by maximum parsimony (MP), minimum evolution (ME), and maximum likelihood (ML) of these populations and other astacids and atyids, confirms the monophyly of the two southeastern populations (P. llamasi) as well as of C. montezumae, andsuggests that Cambaridae constitutes a non-monophyletic assemblage, a hypothesis herein confirmed by a total evidence Bayesian analysis.


8.
Artículo
*En hemeroteca, SIBE-Chetumal
Dinámica de las bacterias anaeróbicas en las fases terminales de la mineralización de la materia orgánica en el sedimento de los ecosistemas Carretas-Pereyra y Chantuto-Panzacola
Torres Alvarado, María del Rocío ; Fernández P., Francisco (coaut.) ; Barriga Sosa, Irene de los Ángeles (coaut.) ; Ramírez Vives, Florina (coaut.) ;
Contenido en: Hidrobiológica Vol. 16, no. 2 (2006), p. 183-196 ISSN: 0188-8897
Bibliotecas: Chetumal
Cerrar
SIBE Chetumal
B10641 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-Chetumal
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Resumen en: Español | Inglés |
Resumen en español

La mineralización de la materia orgánica en los ecosistemas costeros, caracterizados por un aporte constante de sulfatos, se efectúa principalmente en la fase sedimentaria, siendo las bacterias anaeróbicas sulfatorreductoras los principales microorganismos implicados en las últimas fases de degradación. Sin embargo, las bacterias metanogénicas en estos ambientes también son importantes. Los estudios de las poblaciones bacterianas relacionadas con las fases terminales de la degradación anaeróbica de la materia orgánica, se han efectuado básicamente, en ecosistemas de zonas templadas. Con base en lo anterior, el objetivo del presente trabajo fue evaluar la dinámica espacial y temporal de las poblaciones bacterianas sulfatorreductoras y metanogénicas en el sedimento de dos ecosistemas estuarino-lagunares localizados en el Estado de Chiapas. Las muestras de sedimento se colectaron en diferentes meses y la cuantificación de las bacterias sulfatorreductoras y metanogénicas, a partir de diferentes sustratos, se efectuó con la técnica del Número Más Probable. Asimismo, se analizaron diversas variables físicas y químicas en el sedimento y agua intersticial. Los resultados obtenidos indicaron que ambos grupos bacterianos fueron abundantes en el sedimento de las lagunas estudiadas, cuantificándose densidades superiores a las determinadas en sedimentos costeros y lacustres de zonas templadas. Las variaciones temporales y espaciales de la abundancia de estas poblaciones bacterianas se relacionó con el pH, la salinidad y el contenido de sulfatos.

Resumen en inglés

The coastal sediments are important sites for the organic matter mineralization. In this ecosystems, where there is a constant input of sulfates, the sulfate reducing bacteria are the most important microorganisms implicated in the last anaerobic steps of mineralization; however the methanogenic bacteria are also important. There are several studies about the function of this anaerobic bacterial communities, mostly them in temperate regions. The aim of this study was investigate the seasonal and, spatial dynamics of sulfate reducing and, methanogenic bacteria in two coastal lagoons sediments located in Chiapas State. Sediment samples was collected at different months. The sulfate reducing and, methanogenic bacteria were evaluated with Most Probable Number technique using different substrates. Several physical and, chemical parameters was too measured. The sulfate reducing and, methanogenic bacteria were abundant in both coastal lagoons sediments. The bacterial density in the coastal lagoons studied was highest than the reported it in coastal and, freshwater sediments located in temperate regions. Seasonal and, spatial variations of the anaerobic bacterial populations were related with salinity, sulfate concentration and pH.