viernes, 11 de diciembre de 2015


Domínguez-Ayala R., Moo-Valle H., May-Itzá W. de J., Medina-Peralta S., Quezada-Euán, J. J. G. (2016) Stock composition of northern neotropical honey bees: mitotype and morphotype diversity in México (Hymenoptera: Apidae). Apidologie 47: 642-652

 Abstract – The stock of honey bees in the northern neotropics is likely a composite of European and African lineages, but the genetic makeup of most populations in this region has remained unstudied.We analyzed the genetic composition of honey bees across temperate and tropical regions of Mexico using mitochondrial and morphometric analyses. The results showed that honey bees from Mexico are descendent almost in similar proportion from matrilines of African and European origins. However, morphometrics indicate that most colonies are the result of extensive introgressive hybridization with Africanized bees.While large-scale displacement of European honey bees seems to have occurred in the tropical regions, higher frequencies of colonies with a mixed range of African- European markers were identified in the temperate areas. Our results suggest that the outcome of the hybridization between Africanized and European honey bees in Mexico has been significantly associated with climate.


PDF Apidologie

martes, 1 de diciembre de 2015

Fernando Amin Fleites Ayil

Tesis de Maestría: Efecto de Nosema ceranae sobre el comportamiento de forrajeo de la abeja melífera africanizada (Apis mellifera) bajo condiciones tropicales.

Asesores: Dr Luis Medina Medina  y Dr J Javier Quezada Euán


Fecha de examen: 26 de Nov. del 2015.
 



DFG PROJECT 

TITLE: Phenotypic plasticity and reproduction-longevity life-history trade-off: investigating the underlying basis in an orchid bee at the cusp of sociality

In collaboration with , MLU Halle-Wittenberg Project Leader: Professor Robert J. Paxton

Summary: Socially polymorphic species, in which different members of the same species exhibit either solitary or social behaviour, provide unrivalled model systems for exploring the role of sociality in fundamental biological processes. Using a socially polymorphic orchid bee species which can be induced to nest in artificial observation boxes in the field, we shall describe the gene expression profiles of solitary and social (worker and queen) phenotypes to identify key genes underpinning the genetic bauplan of eusociality. By experimentally enhancing/diminishing brood food, we shall test the longevity-reproduction trade-off in the solitary phenotype and test whether there exists a longevity-reproduction correlation in the eusocial phenotype, and use gene expression profiles to identify its genetic basis.

martes, 3 de noviembre de 2015

Estancia para desarrollo de Tesis y Práctica Profesional  

P. Ing. Agrónomo Jorge Luis Hernández Vilchez

Universidad Nacional de Agricultura Catacamas, Olancho, HONDURAS

 Titulo de tesis: EFECTO DE LA EDAD EN LA MIGRACIÓN Y CONCENTRACIÓN ESPERMÁTICA EN ABEJAS REINAS DE Apis mellifera INSEMINADAS INSTRUMENTALMENTE EN ÉPOCA DE ESCASEZ DE RECURSOS EN YUCATÁN, MÉXICO 

Octubre 2015 a 25 Enero 2016

Tutor: M en C Chavier de Araujo Freitas




miércoles, 28 de octubre de 2015

Reconocimiento Institucional a la trayectoria y legado del MVZ Jorge González Acereto


El Dr José de Jesús Williams (Rector de la UADY) y el M en C Marco Torres León (Director del campus) entregaron un reconocimiento a los 30 años de trayectoria incansable promoviendo la conservación de las abejas nativas y la cultura Maya en México y fuera de nuestras fronteras al académico Jorge Angel González Acereto. Con motivo del 45 aniversario de la fundación de la Escuela de Medicina Veterinaria se develó una placa con su nombre en el Meliponario del Campus de Ciencias Biológicas y Agropecuarias en la UADY.



















viernes, 4 de septiembre de 2015

P Brand, SR Ramírez, F Leese, JJG Quezada-Euan, R Tollrian, T Eltz (2015) Rapid evolution of chemosensory receptor genes in a pair of sibling species of orchid bees (Apidae: Euglossini)

 Abstract

Background

Insects rely more on chemical signals (semiochemicals) than on any other sensory modality to find, identify, and choose mates. In most insects, pheromone production is typically regulated through biosynthetic pathways, whereas pheromone sensory detection is controlled by the olfactory system. Orchid bees are exceptional in that their semiochemicals are not produced metabolically, but instead male bees collect odoriferous compounds (perfumes) from the environment and store them in specialized hind-leg pockets to subsequently expose during courtship display. Thus, the olfactory sensory system of orchid bees simultaneously controls male perfume traits (sender components) and female preferences (receiver components). This functional linkage increases the opportunities for parallel evolution of male traits and female preferences, particularly in response to genetic changes of chemosensory detection (e.g. Odorant Receptor genes). To identify whether shifts in pheromone composition among related lineages of orchid bees are associated with divergence in chemosensory genes of the olfactory periphery, we searched for patterns of divergent selection across the antennal transcriptomes of two recently diverged sibling species Euglossa dilemma and E. viridissima.

Results

We identified 3185 orthologous genes including 94 chemosensory loci from five different gene families (Odorant Receptors, Ionotropic Receptors, Gustatory Receptors, Odorant Binding Proteins, and Chemosensory Proteins). Our results revealed that orthologs with signatures of divergent selection between E. dilemma and E. viridissima were significantly enriched for chemosensory genes. Notably, elevated signals of divergent selection were almost exclusively observed among chemosensory receptors (i.e. Odorant Receptors).

Conclusions

Our results suggest that rapid changes in the chemosensory gene family occurred among closely related species of orchid bees. These findings are consistent with the hypothesis that strong divergent selection acting on chemosensory receptor genes plays an important role in the evolution and diversification of insect pheromone systems.

PDF BMC Evol Biol

 

 

 

 

lunes, 10 de agosto de 2015

3rd. IPBES meeting Pollinators, pollination and Food Production - Rome  27-31 July

miércoles, 8 de julio de 2015

Visitante Verano de la Investigación Científica Academia Mexicana de Ciencias


P QFB Aimee Giovanna Solis Greene de la Universidad Popular de la Chontalpa TABASCO

Proyecto: " Residencia espacio temporal de machos de Euglossa en la península de Yucatán (Hymenoptera: Apidae)" 29-junio al 21 de agosto

Tutor: Dr J Javier Quezada-Euán

miércoles, 6 de mayo de 2015

Rubén Guillermo Medina Hernández

Tesis de Maestría: Dimorfismo sexual isométrico en Euglossa viridissima Friese (Hymenoptera:Apidae:Euglossini) durante dos temporadas climáticas.

Mayo 4 - 2015

Asesor: Dr J Javier Quezada Euán 

PDF Insectes Sociaux 

 

jueves, 30 de abril de 2015

IX Congreso Mesoamericano sobre abejas Nativas- Abril 23-25 de 2015, San Cristobal de las Casas Chiapas, México.

De izq. a derecha: Javier Quezada-Euán, Victor González, Ismael Hinojosa-Díaz, Valeria Morales-García, Jorge Mérida, Ricardo Ayala y Carlos Vergara.

martes, 21 de abril de 2015

Quezada-Euán J.J.G.; Sheets H.D.; De Luna E.; Eltz T. (2015) Identification of cryptic species and morphotypes in male Euglossa: morphometric analysis of forewings (Hymenoptera: Euglossini). Apidologie 46: 787-795

  Abstract

 Males of sibling orchid bees Euglossa viridissima and E. dilemma are morphologically cryptic, except for the number and shape of mandibular teeth. An alternative morph of E. viridissima has a third tooth similar to males of E. dilemma. We used this model system to evaluate the potential of wing morphometrics for the resolution of these groups. We found differences in the size characters of forewings of E. viridissima and E. dilemma albeit with substantial overlapping amongst them. However, geometric morphometrics of forewing vein intersections separated both species and, to a lesser extent, morphotypes. A discriminant analysis of the shape of the radial cell showed separation between all three groups, too, albeit with higher misclassification between E. viridissima and E. dilemma. We show that sibling cryptic species and morphotypes can be identified by geometric morphometrics, supporting its application with other methods as powerful aids to infrageneric taxonomy in bees.



Macías-Macias J.O; Quezada-Euán J.J.G. (2015) Quantification of brood emergence and distribution of individuals in M. colimana (Hymenoptera-Meliponini) in temperate climate. Rev. Mex. Cienc. Pec. 6: 233-241




ABSTRACT

Melipona colimana is a stingless bee endemic of Mexico that inhabiting temperate regions of the Southern State of Jalisco. Observations were made during the fall to infer the possible participation of the workers in the production of males. The behavior of workers and queen in provisioning and oviposition process (POP) was analyzed, the proportion of individuals was obtained in the brood combs and their spatial distribution for detecting clusters of males. In the analysis of POPs no evidence of reproductive labor activity of workers were observed. In the brood combs, 65.9 % of individuals that emerged were workers, 22.4 % males (without registering agglomerations) and 11.5 % were gynes. It was observed that the production of sexed individuals (males and gynes) was higher than tropical species, which could be a strategy of this species to ensure their reproduction in temperate climates. Having no visual evidence of the activity of reproductive workers together with the fact that no clusters of males in the brood combs were found, suggests that in this species at this time of year, all the eggs that developed as males come from the queen. With the results of this study, knowledge of the particular biology of this mountain stingless bee species is extended and a comparison with tropical species is made

miércoles, 15 de abril de 2015

Eva Yolotzin Gutiérrez Gamiño

 Tesis de Maestría: Efecto del alimento larval en el perfil de hidrocarburos cuticulares y reconocimiento de reinas vírgenes de abejas Scaptotrigona pectoralis (Hymenoptera:Meliponini)

Asesor: Dr J Javier Quezada Euán

Marzo 2015 

PDF Behav. Ecol. Sociobiol. 

martes, 14 de abril de 2015

Dr. Samuel Vieira Boff

Estancia Postdoctoral en conjunto con la Universidad de Halle, Alemania (Noviembre 2013- Marzo 2014) para estudiar comportamiento de guardia en nidos con hembras múltiples de Euglossa viridissima