نتایج جستجو برای: apis mellifera
تعداد نتایج: 10249 فیلتر نتایج به سال:
Bees of the genus Apis are important foragers of nectar and pollen resources. Although the European honeybee, Apis mellifera, has been well studied with respect to its sensory abilities, learning behaviour and role as pollinators, much less is known about the other Apis species. We studied the anatomical spatial resolution and absolute sensitivity of the eyes of three sympatric species of Asian...
Apis mellifera venom is one of the best characterized venoms among Hymenoptera, yet relatively little is known about venom belonging to other species in the genus Apis. Melittin, one of the most important bioactive peptides, has been isolated and characterized in A. mellifera, Apis cerana, Apis dorsata and Apis florea, while apamin has been only characterized in A. mellifera and A. cerana. At p...
Nosema diseases is known to have two infecting Apis mellifera, Nosema apis and Nosema ceranae. Historically N. apis was known to be well established pathogen of A. mellifera. Whoever N. ceranae was frequently reported to infect the honeybees during the last decade. Both N. apis and N. ceranae are now thought to be widespread across the world. Honey bees are also found to be co-infected with bot...
Apis mellifera L. is native to Europe, Africa, and Asia (including Saudi Arabia, Iran and the Ural mountains of Russia). It is currently widely distributed across the world due to multiple migrations and introductions (Ruttner, 1988). Apis mellifera includes about two dozen subspecies that are present in different regions of the world. These subspecies have been classified into five main lineag...
Honey bee samples collected between 1995 and 2007 from 12 states were examined for the presence of Nosema infections. Our results showed that Nosema ceranae is a wide-spread infection of the European honey bee, Apis mellifera in the United States. The discovery of N. ceranae in bees collected a decade ago indicates that N. ceranae was transferred from its original host, Apis cerana to A. mellif...
s 23: 1336. 50. MERCER, A R; MENZEL, R (1982) The effects of biogenic amines on conditioned and unconditioned responses to olfactory stimuli in the honeybee Apis mellifera. Journal of Comparative Physiology 145: 363–368. 51. MESSAGE, D; GONÇALVES, LS (1977) Estudio da resitência compartamental à cria pútrida européia em Apis mellifera adansonii (africanizadas). Anais do 4° Congresso Brasileiro ...
The question of when in the course of a visit to a feeding place foraging honeybees (Apis mellifera) learn about its location was studied in Experiment 1 by moving the animals a short distance after they arrived and began to feed. A preference for the arrival place developed, although less rapidly than in control animals for which the arrival and departure places were the same. In Experiments 2...
The western honeybee, Apis mellifera is a prominent model organism in the field of sociogenomics and a recent upgrade substantially improved annotations of the reference genome. Nevertheless, genome assemblies based on short-sequencing reads suffer from problems in regions comprising e.g. multi-copy genes. We used single-molecule nanopore-based sequencing with extensive read-lengths to reconstr...
The seasonal variations in the chemical composition of Brazilian propolis, collected by two bee subspecies, Africanized Apis mellifera and European Apis mellifera ligustica, have been investigated by GC and GC-MS. The main components of the samples were phenolic compounds, especially cinnamic acid derivatives, the only exception being the autumn sample from Apis mellifera ligustica, where diter...
Reproductive isolation between closely related species is often incomplete. The Western honeybee, Apis mellifera, and the Eastern hive bee, Apis cerana, have been allopatric for millions of years, but are nonetheless similar in morphology and behaviour. During the last century, the two species were brought into contact anthropogenically, providing potential opportunities for interspecific matin...
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