Apidologie

https://www.apidologie.org/

List of Papers (Total 1,758)

Temporal niche overlap and distinct bee ability to collect floral resources on three species of Brazilian Malpighiaceae

Spatial and temporal limited resource and niche overlap studies have been widely used to explain resource-sharing in community ecology. Furthermore, morphological and behavioral differences among species are relevant to predict how they may share niche availabilities. We evaluated temporal niche overlap and the ability of visitors to collect floral resources on three...

Newly emerged workers of the stingless bee Scaptotrigona aff. depilis prefer stored pollen to fresh pollen

Like in honey bees, the pollen collected and stored by stingless bees usually undergoes a fermentation process characterized by increase in moisture, lactic acid, and proliferation of microorganisms. We tested whether 2-day-old Scaptotrigona aff. depilis workers were more attracted to and consumed fermented pollen from old pollen pots (>7 days) or fresh pollen collected from the...

Introduction of Aethina tumida (Coleoptera: Nitidulidae) in the regions of Calabria and Sicily (southern Italy)

Aethina tumida (small hive beetle, SHB) was first detected in September 2014 in Calabria region, southern Italy, and in a single apiary in Sicily in November 2014. In September 2015, SHB was again recorded in Calabria, and in 2016, only sentinel honey bee nucleus colonies were found to be infested. Its phylogenetic relationship and possible origin were investigated comparing the...

Honeybee worker larvae perceive queen pheromones in their food

Honeybee workers develop from fertilised eggs, but those reared in a queenless colony develop into ‘rebel’ workers, which are more queen-like than typical workers. Rebels develop after an old queen leaves with a swarm and before a new queen hatches. We hypothesised that larval food lacking queen mandibular pheromones trigger the rebel phenotype. Larvae reared under queenright or...

Bigger and sweeter passion fruits: effect of pollinator enhancement on fruit production and quality

Brazil stands out as the world’s largest producer of yellow passion fruit, a species of economic interest which, due to its self-incompatibility, depends on pollinators for fruit formation. The main pollinators of passion fruit are large solitary bees of the genus Xylocopa, commonly known as carpenter bees, which are potential candidates for management. Passion fruit crops...

Observations on midgut of Apis mellifera workers (Hymenoptera: Apoidea) under controlled acute exposures to a Bacillus thuringiensis-based biopesticide

Morphostructural investigations have been carried out on Apis mellifera workers treated with single controlled acute exposures to a biopesticide containing Bacillus thuringiensis (Bt), to detect midgut changes until 96 h. Our findings show concentration-dependence of these changes, reflecting in different degrees on both mortality and behaviour. In particular, some midgut changes...

Distance between honey bee Apis mellifera colonies regulates populations of Varroa destructor at a landscape scale

Inter-colony distance of Apis mellifera significantly affects colony numbers of the parasitic mite Varroa destructor. We set up 15 apiaries, each consisting of two colonies. Each apiary pair was assigned an inter-colony distance of 0, 10, or 100 m. Colonies were rendered nearly mite-free, then one colony in each pair was seeded with 300 female mites (mite-donor colony), while the...

Ecology and nesting biology of the wood-boring bee Trichothurgus laticeps (Hymenoptera: Megachilidae) in a Monte desert reserve in mid-western Argentina

Studying bee nests can enlighten our understanding of feeding specialization and phylogenetic relationships of bees. We studied the nesting and feeding habits of Trichothurgus laticeps in the Monte desert ecosystem. Our results show that T. laticeps is attracted to pre-existing cavities in wood (trap nests), which were further excavated for nest construction; nest cells are...

Timing and size of daily pollen meals eaten by adult females of a solitary bee (Nomia melanderi) (Apiformes: Halictidae)

Pollen feeding by solitary bees has been studied mainly with their larvae, overlooking pollen feeding by adults. To address this knowledge gap, we determined the amounts and temporal (daily and lifetime) schedules of pollen consumption by freely nesting, adult females of the alkali bee (Nomia melanderi, Halictidae). Nesting females of known ages were taken at different hours of...

Multiyear survey targeting disease incidence in US honey bees

The US National Honey Bee Disease Survey sampled colony pests and diseases from 2009 to 2014. We verified the absence of Tropilaelaps spp., the Asian honey bee (Apis cerana), and slow bee paralysis virus. Endemic health threats were quantified, including Varroa destructor, Nosema spp., and eight honey bee viruses. Varroa loads varied across years, with annual fall peaks; Nosema...

High prevalence of Miconia chamissois (Melastomataceae) pollen in brood cell provisions of the orchid bee Euglossa townsendi in São Paulo State, Brazil

Females of bee species can present a temporal specialized behavior in the food collection for their offspring. We studied the food of Euglossa townsendi immatures from nests established in trap-nests disposed in a hygrophilous forest in Brazil, between March 2010 and February 2012. The pollinic material remaining in the brood cells were acetolysed and identified by comparison...

Combined effect of pollen quality and thiamethoxam on hypopharyngeal gland development and protein content in Apis mellifera

Pollen diet is essential to nurse bees to develop hypopharyngeal glands (HPGs) and produce royal jelly to feed larvae. The effect of different diet regimes combined with pesticide exposure on the development of HPGs in honeybees was studied. In particular, a high-quality pollen mixture (high pollen diversity and protein content) and a low-quality diet (low pollen diversity and...

Selecting honeybees for worker brood that reduces the reproduction of Varroa destructor

We investigated an effect of Apis mellifera worker brood on the reproduction of Varroa destructor as a resistance trait by conducting seven generations of bidirectional selection. Initial tests showed twofold differences in mite fecundity (progeny per foundress mites) between colonies of different origins. In the first two generations of selection, low and high lines differed...

Cloning and molecular identification of triosephosphate isomerase gene from Apis cerana cerana and its role in response to various stresses

Apis cerana cerana triosephosphate isomerase (AccTPI), a key regulatory enzyme in glycolysis and gluconeogenesis pathway, catalyzes the interconversion of glyceraldehyde 3-phosphate to dihydroxyacetone phosphate. However, its role in A. cerana cerana has not been completely clarified. In this study, a TPI gene was cloned from A. cerana cerana and named AccTPI. The open reading...

Influence of pollen deprivation on the fore wing asymmetry of honeybee workers and drones

Environmental stress during development can be linked to changes in morphological traits of the organism such as increased fluctuating asymmetry. In suboptimal conditions, like food deprivation, developmental stability may be perturbed, because organisms are not able to buffer disturbances caused by stressors and, in effect, greater degrees of asymmetry can arise during...

Heritabilities and genetic correlations for honey yield, gentleness, calmness and swarming behaviour in Austrian honey bees

Heritabilities and genetic correlations were estimated for honey yield and behavioural traits in Austrian honey bees using data on nearly 15,000 colonies of the bee breeders association Biene Österreich collected between 1995 and 2014. The statistical models used distinguished between the genetic effect of workers and that of the queen of the colony. Heritability estimates for...

Quo vadis Aethina tumida? Biology and control of small hive beetles

Small hive beetles (SHBs) are generalists native to sub-Saharan Africa and reproduce in association with honeybees, bumblebees, stingless bees, fruits and meat. The SHB has recently become an invasive species, and introductions have been recorded from America, Australia, Europe and Asia since 1996. While SHBs are usually considered a minor pest in Africa, they can cause...

Structural and temporal dynamics of the bee curtain in the open-nesting honey bee species, Apis florea

Workers of open-nesting honey bee species form a bee curtain to cover the comb and protect it against adverse environmental conditions and predators. We studied different aspects of structural and temporal dynamics of the bee curtain in Apis florea. First, in the course of daily observations, we discovered massed flight activity (MFA) of A. florea colonies similar to that...

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

In Brazil, where the use of neonicotinoids is allowed in bee-attracting flowering crops, we investigated whether thiamethoxam intake during the larval stage of the native bee species Scaptotrigona aff. depilis affects the survival and development by exposing larvae to contaminated food. Our results indicated that the larvae exposed to the dose at a field-realistic level and to...

Cap removal by honey bees leads to higher pollen rewards from grapevine flowers

Pollen of wind-pollinated plants such as grapevine rapidly dries out and is blown away after the anthers dehisce. Therefore, from the point of view of a pollen-collecting bee, pollen from wind-pollinated flowers is best collected soon after it becomes exposed. In grapevine, pollen becomes available immediately after the calyptra is shed, a process also referred to as capfall. We...