28 documents found, page 1 of 3
Climate change-induced stress in the honey bee Apis mellifera L.- a genetic review
Sagastume, Soledad; Cilia, Giovanni; Henriques, Dora; Yadró García, Carlos A.; Corona, Miguel; Higes, Mariano; Pinto, M. Alice; Nanetti, AntonioClimate change is a powerful driver of stress, as it reinforces hotter and drier environments. For bees, the most concerning aspects of these new environmental conditions are the resistance and resilience of bees to changes in temperature, humidity and ultraviolet radiation, as well as the negative effect on diversity of food resources which can lead in nutritional stress. The climatic vulnerability of various ...
Honeybee gut microbiota as an emerging endpoint for pesticide risk assessments
Rosa-Fontana, Annelise; Aguado-López, Daniel; Jabal-Uriel, Clara; Martín-Hernández, Raquel; Higes, Mariano; Pinto, M. Alice; Henriques, DoraA recent roadmap for the integration of environmental microbiotas in risk assessments under the European Food Safety Authority (EFSA) remit has been published. Healthy honeybee gut microbiota has emerged as a promising avenue to protect bees against stressors. Honeybees exhibit a consistent core microbiota, and dysbiosis, as part of a multiple stressor system, may be an indicator of adverse scenarios. We theref...
Varroa destructor and nosema ceranae shape the honey bee gut microbiota
Aguado-López, Daniel; Pinto, M. Alice; Lopes, Ana; Henriques, Dora; Pérez-Pérez, Antonio; Alba, Claudio; Rodríguez-Gómez, Juan MiguelThe Azores archipelago consists of nine islands with endemic bee populations belonging to the African lineage, although there is also genetic evidence of the introduction of European bees. These introductions have in all likelihood introduced pathogens like Varroa destructor (V) and Nosema ceranae (N). However, the restricted movement of bee colonies between islands has limited their spread throughout the archi...
Resistance of varroa destructor to pyrethroids: a preliminary analysis in Portugal
Costa, Maíra; Lopes, Ana; Yadró Garcia, Carlos A.; Coelho, Marta; Martín-Hernández, Raquel; Higes, Mariano; Pires, Sancia; Pinto, M. AliceInfestations of Varroa destructor are closely associated with colony collapse in the honey bee (Apis mellifera). Currently, three classes of acaricidal compounds are utilized to combat these infestations: pyrethroids (fluvalinate and flumethrin), organophosphates (coumaphos) and formamidines (amitraz). The first cases of V. destructor resistance to pyrethroids were reported in Italy, followed by numerous instan...
Projeto MITE- Varroa e vírus transmitidos: monItorização de muTações e dEsenvol...
Henriques, Dora; Yadró Garcia, Carlos A.; Lopes, Ana Rita; Rufino, José; Costa, Maíra; Coelho, Marta; Martín-Hernández, Raquel; Higes, MarianoA abelha melífera (Apis melífera L.) tem sido ameaçada por diferentes fatores, tais como pesticidas, alterações climáticas, má nutrição, espécies invasoras tais como o predador Vespa velutina, a bactéria causadora da loque americana Paenibacillus larvae, e principalmente, o ácaro parasita Varroa destructor (vulgarmente conhecido como varroa), que é apontado como umas das mais importantes ameaças para a abelha m...
Honeybee gut microbiota is an imperative endpoint for pesticide risk assessment
Rosa-Fontana, Annelise; Aguado-López, Daniel; Uriel Clara, Jabal; Martín-Hernández, Raquel; Higes, Mariano; Pinto, M. Alice; Henriques, DoraIn nature, honeybee workers acquire their stable gut microbial community by the 7th day post-emergence, with older bees transmitting microorganisms to younger bees in the comb, thereby establishing natural microbial diversity. In contrast, younger caged bees sampled for laboratory trials (OECD Guideline No. 245) are in contact with older bees for only a few hours. Newly emerged bees harbor minimal to no bacteri...
Frequent parasitism of Apis mellifera by Trypanosomatids in geographically isol...
Aguado-López, Daniel; Bartolomé, Carolina; Lopes, Ana; Henriques, Dora; Segura, Sara K.; Maside, Xulio; Pinto, M. Alice; Higes, MarianoTrypanosomatids form a group of high prevalence protozoa that parasitise honey bees, with Lotmaria passim as the predominant species worldwide. However, the knowledge about the ecology of trypanosomatids in isolated areas is limited. The Portuguese archipelagos of Madeira and Azores provide an interesting setting to investigate these parasites because of their geographic isolation, and because they harbour hone...
First detection of Nosema ceranae in honey bees (Apis mellifera L.) of the Maca...
Lopes, Ana; Martin-Hernandez, Raquel; Higes, Mariano; Segura, Sara K.; Henriques, Dora; Pinto, M. AliceThe Microsporidia Nosema ceranae is an invasive pathogen affecting honey bee health, particularly in warm climates. In this study, N. ceranae was detected for the first time in honey bees (Apis mellifera L.) of the Madeira archipelago, indicating that this pathogen is now spreading across the entire Macaronesia. Nosema apis was not detected, and the high prevalence (67.7%) of N. ceranae indicates its dominance ...
Frequent parasitism of Apis mellifera by trypanosomatids in geographically isol...
Martin Hernández, Raquel; Aguado-López, Daniel; Bartolomé, Carolina; Lopes, Ana; Henriques, Dora; Maside, Xulio; Pinto, M. Alice; Higes, MarianoTrypanosomatids form a group of high prevalence protozoa that parasitise honey bees, with Lotmaria passim as the predominant species worldwide. However, the knowledge about the ecology of trypanosomatids in isolated areas is limited. The Portuguese archipelagos of Madeira and Azores provide an interesting setting to investigate these parasites because of their geographic isolation, and because they harbour hone...
Projeto MITE- Varroa e vírus transmitidos: MonItorização de muTações e dEsenvol...
Henriques, Dora; Yadró Garcia, Carlos A.; Lopes, Ana; Costa, Maíra; Rufino, José; Martín-Hernández, Raquel; Higes, Mariano; Silva, DinisO ácaro ectoparasita varroa (Varroa destructor), que causa a doença varroose, e alguns dos vírus transmitidos, como o vírus das asas deformadas (Deformed wing vírus – DWV), são apontados como umas das mais importantes ameaças para a abelha melífera a nível global. O controle mais eficaz da varroa envolve o uso de acaricidas, sintéticos ou orgânicos. No entanto, o uso intensivo dos acaricidas sintéticos tem leva...