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5 resultados encontrados para: AUTOR: Sagot, Philippe
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1.
- Artículo con arbitraje
Registros nuevos de abejas sin aguijón (Apidae: Meliponini) para los estados de Chiapas y Oaxaca, México
Arnold, Noemi I. ; Ayala Barajas, Ricardo (coaut.) ; Mérida, Jorge (coaut.) ; Sagot, Philippe (coaut.) ; Aldasoro Maya, Elda Miriam (coaut.) ; Vandame, Rémy (coaut.) ;
Contenido en: Revista Mexicana de Biodiversidad Vol. 89, no. 3 (September 2018), p. 651-665 ISSN: 1870-3453
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Resumen en: Español | Inglés |
Resumen en español

Se aportan nuevos registros a la fauna de abejas sin aguijón (tribu Meliponini) para los estados de Oaxaca y Chiapas. Para ello, se hicieron muestreos intensivos de estas abejas, con lo cual se reunieron registros de distribución, incluyendo las aportadas por investigadores, las presentes en colecciones y los reportados en la literatura. Se tienen 12 registros nuevos de especies de abejas sin aguijón para Oaxaca y se confirma la presencia en Chiapas de Paratrigona opaca. Adicionalmente, se discute sobre la distribución de estas abejas en estos estados y el país. Se espera que la información sobre la fauna y la distribución de las abejas sin aguijón ayude en los esfuerzos de conservación regional, uso de estas abejas en la meliponicultura y la polinización.

Resumen en inglés

New records for the fauna of stingless bees (tribe Meliponini) in the Mexican states of Oaxaca and Chiapas are reported. These records were obtained through intensive sampling of these bees. A database of the records generated from this sampling effort was compiled along with data provided by other researchers, data present in collections, and data reported in the literature. The study shows 12 new records of Meliponini not previously identified in Oaxaca, and confirms the presence of the species Paratrigona opaca in Chiapas. In addition, the distribution of these bees in the 2 states and the country is discussed. It is expected that this information on the fauna and distribution of stingless bees will help regional conservation efforts and the use of these bees in stingless beekeeping and pollination.


2.
Artículo
*Solicítelo con su bibliotecario/a
Thoracobombus from Mexico: a description of the male species-specific cephalic labial gland secretions
Brasero, Nicolás ; Vandame, Rémy (coaut.) ; Sagot, Philippe (coaut.) ; Martinet, Baptiste (coaut.) ; Valterová, Irena (coaut.) ; Rasmont, Pierre (coaut.) ;
Contenido en: Apidologie Vol. 50, no. 2 (April 2019), p. 183-194 ISSN: 0044-8435
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

The male cephalic labial gland secretions of bumblebees are known to be species-specific semiochemicals. These secretions that are involved in bumblebee pre-mating recognition provide efficient diagnostic characters for species delimitation. The subgenus Thoracobombus is the largest group of bumblebees and is found in the Palearctic, Nearctic, and Neotropical regions. Here, the cephalic labial gland secretion (CLGS) composition of six Mexican Thoracobombus bumblebee species are analyzed: Bombus diligens, B. medius, B. mexicanus, B. pensylvanicus, B. trinominatus, and B. weisi. Our results suggest the presence of two new potential species into the formerly recognized B. weisi as well as one new potential species in the taxon presently identified as B. pensylvanicus. Moreover, the male of B. pensylvanicus, known to congregate at nest sites awaiting the emergence of virgin queens, is characterized by low concentrations of the C16 component. This observation raises the possibility that courtship behavior as well as environmental constraints could affect the role of the male bumblebees’ CLGS.


3.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Population genetics and geometric morphometrics of the Bombus ephippiatus species complex with implications for its use as a commercial pollinator
Duennes, Michelle A. ; Petranek, Chris (coaut.) ; Pineda Díez de Bonilla, Esteban (coaut.) ; Mérida Rivas, Jorge Alfredo (coaut.) ; Martínez López, Óscar (coaut.) ; Sagot, Philippe (coaut.) ; Vandame, Rémy (coaut.) ; Cameron, Sydney A. (coaut.) ;
Contenido en: Conservation Genetics Vol. 18, no. 3 (June 2017), p. 553–572 ISSN: 1572-9737
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Mexico and Central America are among the most biodiverse regions on Earth, harboring many species with high levels of interpopulation morphological and genetic diversity. The mountainous topography of this region contains isolated sky island habitats that have the potential to promote speciation. This has been studied in vertebrates, yet few studies have examined the phylogeographic and genetic structure of insect species encompassing this region. Here we investigate geographic patterns of genetic and morphological divergence and speciation among widespread populations of the highly polymorphic bumble bee Bombus ephippiatus and its closest relative B. wilmattae. We used DNA sequences from a fragment of cytochrome oxidase I (COI), genotypes for twelve microsatellite markers, and morphometric data from wings to construct a well-supported inference of the divergences among these taxa. We have found complex patterns of genetic isolation and morphological divergence within B. ephippiatus across its geographic range and present evidence that B. ephippiatus comprises multiple independent evolutionary lineages. The pattern of their diversification corresponds to geographic and environmental isolating mechanisms, including the Mexican highlands, the lowlands of the Isthmus of Tehuantepec in southern Mexico, the Nicaraguan Depression, the patchily distributed volcanic ranges in Nuclear Central America and Pleistocene glacial cycles. These results have important implications for the development and distribution of B. ephippiatus as a commercial pollinator in Mexico and Central America.


4.
Artículo
New orchid and leaf-cutter bee gynandromorphs, with an updated review (Hymenoptera, Apoidea)
Hinojosa Díaz, Ismael A. ; González, Victor H. (coaut.) ; Ayala Barajas, Ricardo (coaut.) ; Mérida, Jorge (coaut.) ; Sagot, Philippe (coaut.) ; Engel, Michael S. (coaut.) ;
Contenido en: Zoosystematics and Evolution Vol. 88, no. 2 (October 2012), p. 205–214 ISSN: 1860-0743
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
36025-10 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

Two new cases of gynandromorphs in bees are described and figured: a mixed, nearly bilateral gynandromorph of the orchid bee Euglossa (Euglossa) tridentata Moure and a mixed gynandromorph of the megachilid bee Megachile (Chelostomoides) otomita Cresson. Records of gynandromorphic bees recently documented in the literature are also summarized. In less than a decade, more than 20 new cases were documented in 15 species and five genera previously unknown; as of today, gynandromorphs are recorded from 113 species in 29 genera of all bee families. Most gynandromorphs have been recorded from the long-tongued bee families Apidae and Megachilidae, but at the generic level, a significant percentage of species are from the megadiverse Megachile s.l. (23% of the total) and Andrena (14%) (Andrenidae). Although gynandromorphs are known from all major biogeographic regions of the world, most are recorded from the Holarctic region (79%)


5.
- Artículo con arbitraje
Quaternary climate instability is correlated with patterns of population genetic variability in Bombus huntii
Koch, Jonathan B. (autor) ; Vandame, Rémy (autor) ; Mérida Rivas, Jorge Alfredo (autor) ; Sagot, Philippe (autor) ; Strange, James (autor) ;
Contenido en: Ecology and Evolution Vol. 8, no. 16 (Aug. 2018), p. 7849-7864 ISSN: 2045-7758
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Resumen en: Inglés |
Resumen en inglés

Climate oscillations have left a significant impact on the patterns of genetic diversity observed in numerous taxa. In this study, we examine the effect of Quaternary cli - mate instability on population genetic variability of a bumble bee pollinator species, Bombus huntii in western North America. Pleistocene and contemporary B. huntii habitat suitability (HS) was estimated with an environmental niche model (ENM) by associating 1,035 locality records with 10 bioclimatic variables. To estimate genetic variability, we genotyped 380 individuals from 33 localities at 13 microsatellite loci. Bayesian inference was used to examine population structure with and without a priori specification of geographic locality. We compared isolation by distance (IBD) and isolation by resistance (IBR) models to examine population differentiation within and among the Bayesian inferred genetic clusters. Furthermore, we tested for the effect of environmental niche stability (ENS) on population genetic diversity with linear regression. As predicted, high- latitude B. huntii habitats exhibit low ENS when compared to low- latitude habitats. Two major genetic clusters of B. huntii inhabit western North America: (a) a north genetic cluster predominantly distributed north of 28°N and (b) a south genetic cluster distributed south of 28°N. In the south ge - netic cluser, both IBD and IBR models are significant. However, in the north genetic cluster, IBD is significant but not IBR.

IBR. Furthermore, the IBR models suggest that low- latitude montane populations are surrounded by habitat with low HS, possibly limit - ing dispersal, and ultimately gene flow between populations. Finally, we detected high genetic diversity across populations in regions that have been climatically unsta - ble since the last glacial maximum (LGM), and low genetic diversity across popula - tions in regions that have been climatically stable since the LGM. Understanding how species have responded to climate change has the potential to inform management and conservation decisions of both ecological and economic concerns.