Results 241 to 250 of about 1,632,755 (285)

Development Periods for Eggs of Africanized and European Honeybees

Journal of Apicultural Research, 1981
SummaryIn a side-by-side test in Venezuela, 593 eggs from 7 Africanized queen honeybees and 355 eggs from 7 European queens (from USA) were kept in an incubator (35 ± 1°C) without adult bees. Eggs from the two groups hatched after 69·6 ± 1·06 h and 73·3 ± 1·14 h, respectively (x ± SD), indicating a basic physiological difference between development ...
Thomas E. Rinderer, Anita M. Collins, Alan B. Bolten, John R. Harbo   +3 more
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Response to Alarm Pheromone by European and Africanized Honeybees

Journal of Apicultural Research, 1987
SummaryWorkers of two honeybee (Apis mellifera L.) geographical types, European and Africanized, in Venezuela were assayed for response to sting-associated alarm pheromone. Groups of young bees were exposed to either isopentyl acetate (IPA) or a mixture of 10 alarm chemicals, including IPA, at five concentrations.
D. G. Pesante, K. W. Tucker, Anita M. Collins, Thomas E. Rinderer   +3 more
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Ages of Bees in Swarms and Afterswarms of the Africanized Honeybee

Journal of Apicultural Research, 1978
SummaryObservations on marked bees in swarms and afterswarms from colonies of Africanized honeybees in French Guiana, South America, showed that 80–100° of bees in the colony that were 3–8 days old left with the prime swarm. This is a much higher percentage than has been reported for European bees in Europe.
Mark L. Winston, Gard W. Otis
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Biochemical and immunochemical comparison of Africanized and European honeybee venoms

Journal of Allergy and Clinical Immunology, 1990
Africanized honeybees (HBs) pose a hazard to both normal and sting-sensitive subjects in certain areas of Central and South America, and it is predicted that they will soon be present in the southern United States as well. Using an electrical stimulation device, we collected Africanized HB venom (AHV) in Venezuela and European HB venom (EHV) in ...
Anita M. Collins, Richard L. Hellmich, Richard T. Jones, John W. Yunginger, D.L. Squillace, R. M. Helm, D. R. Nelson   +6 more
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The Introduction and Diffusion of the African Honeybee in South America [PDF]

Yearbook of the Association of Pacific Coast Geographers, 1988
In 1956 scientists introduced the African honeybee, Apis mellifera scutellata , into Brazil in an effort to improve honeybee genetic stock in that country. Almost immediately the bee escaped from captivity, hybridized with existing honeybee populations, and began diffusing over the South American continent.
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Africanized honeybees have unique tolerance to Varroa mites

Trends in Parasitology, 2004
WR99210 but does not affect the intrinsic activity of proguanil. Proc. Natl. Acad. Sci. U. S. A. 94, 10931–10936 30 Walter, R. etal. (1991) Pyrimethamine-resistantPlasmodiumfalciparum lack cross-resistance to methotrexate and 2,4-diamino-5-(substituted benzyl) pyrimidines. Parasitol. Res. 77, 346–350 31 Cunningham, R.F. et al.
Stephen J. Martin, Luis A. Medina Medina
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African honeybees as a mitigation method for elephant impact on trees

Biological Conservation, 2018
Abstract Conservation managers are concerned about the impact that African elephants (Loxodonta africana) have on large tree species, necessitating the need for mitigation methods. Elephants actively avoid contact with African honeybees (Apis mellifera subsp.
Francesca Parrini, L.E. King, L.E. King, Michelle Henley, Ed T.F. Witkowski, R.M. Cook   +5 more
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Survival After Massive (>2000) Africanized Honeybee Stings

Archives of Internal Medicine, 1998
We report the clinical case of a man who survived a massive attack of Africanized bees (>2000 bee stings). The man experienced anaphylactic shock and multisystem organ failure (neurologic, hepatic, renal, and hematologic failure). He was treated with administration of dopamine hydrochloride, antihistaminic agents, corticosteroids, fluid and electrolyte
Cristóbal Leonel Díaz-Sánchez, Gregorio Ignacio-Ibarra, Alberto Lifshitz-Guinzberg, José Halabe-Cherem, Alfredo Quinones-Galvan   +4 more
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The Past and Possible Future Spread of Africanized Honeybees in the Americas

, 1977
Orley Taylor is an ecologist, appointed by the US Department Agriculture to monitor and study the spread of “Africanized bees”—hybrids between Apis mellifera of European origin and Apis mellifera adansonii—in the Americas.
O. Taylor
semanticscholar   +1 more source

Adaptive maintenance of European alleles in the Brazilian Africanized honeybee

Molecular Ecology, 2017
The Anthropocene is an epoch hallmarked by intensified human intrusion across ecosystems. One such intrusion is the movement and re‐introduction of long‐separated populations. By facilitating introgression – intraspecific genetic admixture – secondary contact can facilitate range expansion and the establishment of invasive species.
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