Results 31 to 40 of about 31,067 (227)

A gynandromorph of Xylocopa augusti and an unusual record of X. iris from Brazil (Hymenoptera: Apidae: Xylocopini) [PDF]

open access: yes, 2015
We describe and illustrate for the first time a mixed gynandromorph of Xylocopa(Neoxylocopa) augusti Lepeletier de Saint Fargeau from Buenos Aires, Argentina. Also, we document and discuss a historical specimen of the Old World carpenter bee X. (Copoxyla)
Gonzalez, Victor H.   +2 more
core   +4 more sources

El código de barras de ADN confirma la distribución de Bombus magnus (Vogt, 1911) (Hymenoptera: Apidae) en la península Ibérica

open access: yesGraellsia, 2019
Bombus magnus (Vogt, 1911) (Hymenoptera: Apidae) es una de las tres especies crípticas pertenecientes al complejo lucorum junto con B. lucorum (Linnaeus, 1761) y B. cryptarum (Fabricius, 1775). En la península Ibérica solo se encuentran B.
Nuria Blasco-Lavilla   +2 more
doaj   +1 more source

Late Winter Foraging by Honeybees (Hymenoptera: Apidae) at Sapsucker Drill Holes [PDF]

open access: yes, 2017
Observations of Apis mellifera foraging at sapsucker drill holes were made during February 1988 in southwestern Virginia. Foraging bouts were dependent upon temperature; more bees visited drill holes when ambient temperatures exceeded 10oC. Honeybees did
Williams, Charles E
core   +3 more sources

Expression of heat-shock protein genes in Apis mellifera meda (Hymenoptera: Apidae) after exposure to monoterpenoids and infestation by Varroa destructor mites (Acari: Varroidae)

open access: yesEuropean Journal of Entomology, 2017
Heat shock proteins (hsps) protect proteins in eukaryotic cells from damage. Expression of hsps in insects subject to different environmental stimuli is poorly characterized.
Najmeh SAHEBZADEH, Wei Hong LAU
doaj   +1 more source

Epeoloides pilosulus (Cresson) Rediscovered in Michigan, with Notes on the Distribution and Status of its Macropis hosts. [PDF]

open access: yes, 2019
Epeoloides pilosulus (Cresson 1878) is one of the rarest bees in North America with only a handful of records since 1960. The last collection in Michigan was made in 1944.
Gibbs, Jason   +4 more
core   +2 more sources

A survey of the bees (Hymenoptera: Apoidea) from Isfahan Province, Iran [PDF]

open access: yesJournal of Insect Biodiversity and Systematics, 2019
In this survey, 154 bee species of Apoidea superfamily, from the western part of the Isfahan province, Iran were recorded, of which 29 species are new for the fauna of Iran.
Razieh Khodarahmi Ghahnavieh   +1 more
doaj  

Combined stress from parasites, pesticides and lack of flowers drives bee declines [PDF]

open access: yes, 2015
Bees are subject to numerous pressures in the modern world. The abundance and diversity of flowers has declined, bees are chronically exposed to cocktails of agrochemicals, and they are simultaneously exposed to novel parasites accidentally spread by ...
Botias Talamantes, Cristina   +3 more
core   +1 more source

Bee pollination effects on yield and chemical composition of West Indian gherkin fruits (Cucumis anguria L., Cucurbitaceae) in the Brazilian semi-arid region [PDF]

open access: yesBrazilian Journal of Biology
Animal pollination plays a key role in global agricultural production and especially of monoecious crops, which are essentially dependent on pollinators.
I. C. S. Magalhães   +4 more
doaj   +1 more source

Towards integrated control of varroa: effect of variation in hygienic behaviour among honey bee colonies on mite population increase and deformed wing virus incidence [PDF]

open access: yes, 2014
Hygienic behaviour in the honey bee, Apis mellifera, is the uncapping and removal of dead, diseased or infected brood from sealed cells by worker bees. We determined the effect of hygienic behaviour on varroa population growth and incidence of deformed ...
Al Toufailia, Hasan M   +4 more
core   +1 more source

Waste management in the stingless bee Melipona beecheii Bennett (Hymenoptera: Apidae) [PDF]

open access: yes, 2014
Waste management is important in insect societies because waste can be hazardous to adults, brood and food stores. The general organization of waste management and the influence of task partitioning, division of labor and age polyethism on waste ...
Hart, Adam G   +2 more
core   +4 more sources

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