Apidologie

https://www.apidologie.org/

List of Papers (Total 1,272)

Honey bee stop-signal production: temporal distribution and effect of feeder crowding

The honey bee stop-signal may decrease recruitment by causing waggle dancers to cease dancing when food patch conditions deteriorate. However, little is known about how signaling may change during the time a signaler is inside the nest and what triggers signal production. All previous feeder studies have used crowded feeders to stimulate stop-signal production. We focused on...

The reliability of morphological traits in the differentiation of Bombus terrestris and B. lucorum (Hymenoptera: Apidae)

The bumblebees of the subgenus Bombus sensu strictu are a notoriously difficult taxonomic group because identification keys are based on the morphology of the sexuals, yet the workers are easily confused based on morphological characters alone. Based on a large field sample of workers putatively belonging to either B. terrestris or B. lucorum, we here test the applicability and...

Reduced expression of major royal jelly protein 1 gene in the mushroom bodies of worker honeybees with reduced learning ability

The learning ability of European honeybees, Apis mellifera, develops with age. However, when worker bees are isolated from their colony and are fed only sucrose solution, their learning development is hindered. This rearing method has allowed us to compare worker bees of the same age but with different learning abilities. In this study, we examined the influence of this rearing...

Breeding for resistance to Varroa destructor in Europe

The rich variety of native honeybee subspecies and ecotypes in Europe offers a good genetic resource for selection towards Varroa resistance. There are some examples of mite resistance that have developed as a consequence of natural selection in wild and managed European populations. However, most colonies are influenced by selective breeding and are intensively managed...

Varroa destructor is the main culprit for the death and reduced populations of overwintered honey bee (Apis mellifera) colonies in Ontario, Canada

The relative effect of parasite levels, bee population size, and food reserves on winter mortality and post winter populations of honey bee colonies was estimated. More than 400 colonies were monitored throughout three seasons in Ontario, Canada. Most of the colonies were infested with varroa mites during the fall (75.7%), but only 27.9% and 6.1% tested positive to nosema disease...

Predictive modelling of honey bee foraging activity using local weather conditions

We investigated the connection between foraging activity of honey bees (Apis mellifera) and local weather conditions. We measured bee egress rate along with temperature, solar radiation, atmospheric pressure, humidity, rainfall, wind direction and speed. Data was collected from two hives, over the periods June–September 2013 (hive 1) and July–September 2014 (hive 2). We fitted an...

Body size and wing asymmetry in bees along an urbanization gradient

The global loss of bee diversity and abundance is a central issue in conservation biology. There is increasing evidence that cities may play an important role in bee conservation, although urbanization may also have negative impacts. Here, we investigate individual body size variation and wing asymmetry (based on 11 traits) in the solitary bee Anthophora plumipes along a rural...

Effect of the own colony odor on olfactory and thermal preferences of the honeybee (Apis mellifera) workers

Honeybee foragers were tested on their preference for the own colony odor either separately, in an olfactometer, or in combination with their temperature preference, in thermal gradient chambers, where their motor activity was also recorded. The bees in the gradient chambers were either deprived of their colony odor for 9 days or exposed to the odor during the experimental days 4...

RNA-Seq reveals that mitochondrial genes and long non-coding RNAs may play important roles in the bivoltine generations of the non-social Neotropical bee Tetrapedia diversipes

In animals, voltinism is a result of evolutionary adaptations to environmental conditions. These evolutionary adaptations may profoundly affect the population structure and social organization level. To study the bivoltinism of the solitary bee Tetrapedia diversipes, we performed comparative transcriptomics analyses of foundresses and larvae from the two reproductive generations...

The ontogenetic saga of a social brain

Queen and worker honeybees differ in a number of life-history traits, including the size of certain brain regions, such as the mushroom bodies (MBs), which are larger in workers. However, during the larval period, the differential feeding offered to queens promotes faster brain development. As a result, members of this caste have larger brains than workers. This developmental...

Computer software for identification of honey bee subspecies and evolutionary lineages

Within the western honey bee (Apis mellifera), there are more than 20 recognised subspecies. It is well known that these subspecies differ in their wing venation patterns. However, there is a demand for efficient tools to identify honey bee subspecies, ecotypes, populations or hybrids. The aim of this study was to develop a fast and easy identification method based on analysing...

Reproduction of rebel workers in honeybee (Apis mellifera) colonies

The honeybee is one of several eusocial species in which the queen is typically the only reproductive member of the colony; worker reproduction is mostly restricted to queenless colonies. Because workers cannot mate, they lay unfertilized eggs, which develop into males. A recent study showed that in queenless colonies, which arise after swarming, worker larvae develop into rebel...

Life-history traits of wild honey bee colonies living in forests around Ithaca, NY, USA

Wild honey bee colonies—both truly wild (in trees and buildings) and simulated wild (in small hives)—were studied to determine their life-history traits, to see if these traits have changed now that these colonies are infested with Varroa destructor. Most colonies (97%) survive summers, but only 23% of founder (first-year) colonies and 84% of established colonies survive winters...

Managed honeybee colony losses of the Eastern honeybee (Apis cerana) in China (2011–2014)

Colony losses of managed honeybees have raised a major concern, and surveys of colony losses were conducted around the globe to understand the apicultural situation. Up to now, most studies have focused on the mortality of the Western honeybee (Apis mellifera); however, little is known about the mortality of its eastern counterpart—the Eastern honeybee (Apis cerana). Here, we...

Internal hive temperature as a means of monitoring honey bee colony health in a migratory beekeeping operation before and during winter

Internal temperatures of honey bee hives kept at different sites in North Dakota were monitored before and during winter to evaluate the effects of treatment, in the form of exposure to commercial pollination, and location on colony health. In October, hives exposed to commercial pollination during the summer had fewer adult bees and less brood than hives kept near natural forage...

Toxicity of thiametoxam on in vitro reared honey bee brood

Pesticides are a possible cause of pollinator decline and honey bee colony losses experienced in several countries in recent years. In the past years, many north-west Italian beekeepers reported the presence of dead brood in field apiaries during neonicotinoid-coated maize sowing; therefore, a possible role of these insecticides was suspected. The objective of this study was to...

Molecular cloning, expression and oxidative stress response of the vitellogenin Gene (AccVg) from Apis cerana cerana

Vitellogenin (Vg) is a yolk precursor protein in most oviparous females. However, Vg has not been studied in the Apis cerana cerana. In this work, the Vg gene of the A. cerana cerana has been cloned and sequenced. The gene codes for a protein consisting of 1770 amino acids in seven exons with a predicted molecular mass and isoelectric point of 200 kDa and 6.46, respectively...

Leaf foraging sources of leafcutter bees in a tropical environment: implications for conservation

Leafcutter bees collect leaf discs to encase brood cells. However, our understanding of their use of plants as nesting resources, which is critical for their conservation, is poor. We followed plants and observed bees cutting leaves to understand the leaf and plant traits of the leaf forage plants of Megachile spp. We studied whether the leaf size explains the cut size and the...