scholarly journals Effect of insecticides on foraging behaviour and pollination role of Apis mellifera L. (Hymenoptera: Apidae) on toria (Brassica campestris var. toria) crop

2014 ◽  
Vol 16 (1) ◽  
pp. 79 ◽  
Author(s):  
D Sharma ◽  
DP Abrol
Keyword(s):  
Apis Mellifera ◽  
Foraging Behaviour ◽  
Brassica Campestris

scholarly journals Pollen Collection and Pollen Foraging Behaviour of Honeybees (Apis mellifera) during Different Time Intervals from Brassica campestris L.

2017 ◽  
Vol 49 (2) ◽  
pp. 733-736
Author(s):  
Rashid Mahmood ◽  
Saima Asad ◽  
Ghulam Sarwar ◽  
Waqar Ahmad ◽  
Ziyad Abdul Qadir ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Foraging Behaviour ◽  
Brassica Campestris ◽  
Pollen Foraging ◽  
Time Intervals ◽  
Pollen Collection

Foraging Behaviour of Apis mellifera scutellata and Hypotrigona gribodoi Bees in Monoculture and Polyculture Vegetable Gardens

2021 ◽  
Author(s):  
Gugulethu Tarakini ◽  
Abel Chemura ◽  
Tawanda Tarakini ◽  
Nilton Mashavakure ◽  
Robert Musundire
Keyword(s):  
Apis Mellifera ◽  
Foraging Behaviour ◽  
Apis Mellifera Scutellata ◽  
Vegetable Gardens

scholarly journals Intra-Colonial Viral Infections in Western Honey Bees (Apis mellifera)

2021 ◽  
Vol 9 (5) ◽  
pp. 1087
Author(s):  
Loreley Castelli ◽  
María Laura Genchi García ◽  
Anne Dalmon ◽  
Daniela Arredondo ◽  
Karina Antúnez ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Honey Bee ◽  
Viral Infections ◽  
Sampling Period ◽  
Virus Genome ◽  
The Individual ◽  
Bee Virus ◽  
Insight Into ◽  
Bee Viruses

RNA viruses play a significant role in the current high losses of pollinators. Although many studies have focused on the epidemiology of western honey bee (Apis mellifera) viruses at the colony level, the dynamics of virus infection within colonies remains poorly explored. In this study, the two main variants of the ubiquitous honey bee virus DWV as well as three major honey bee viruses (SBV, ABPV and BQCV) were analyzed from Varroa-destructor-parasitized pupae. More precisely, RT-qPCR was used to quantify and compare virus genome copies across honey bee pupae at the individual and subfamily levels (i.e., patrilines, sharing the same mother queen but with different drones as fathers). Additionally, virus genome copies were compared in cells parasitized by reproducing and non-reproducing mite foundresses to assess the role of this vector. Only DWV was detected in the samples, and the two variants of this virus significantly differed when comparing the sampling period, colonies and patrilines. Moreover, DWV-A and DWV-B exhibited different infection patterns, reflecting contrasting dynamics. Altogether, these results provide new insight into honey bee diseases and stress the need for more studies about the mechanisms of intra-colonial disease variation in social insects.

Role of External Factors in Embryogenesis of Apis mellifera

2021 ◽  
Vol 52 (6) ◽  
pp. 422-429
Author(s):  
D. V. Boguslavsky ◽  
I. S. Zakharov
Keyword(s):  
Apis Mellifera ◽  
External Factors

A Method for Chronically Implanting Stimulating Electrodes into the Brains of Locusts, and some Results of Stimulation

1963 ◽  
Vol 40 (2) ◽  
pp. 271-284
Author(s):  
C. H. FRASER ROWELL
Keyword(s):  
Stainless Steel ◽  
Brain Stimulation ◽  
Sexual Behaviour ◽  
Foraging Behaviour ◽  
Stimulating Electrodes ◽  
The Brain ◽  
Antennal Movement ◽  
Steel Electrodes

1. Methods are described for implanting permanent stainless-steel electrodes into the brains of locusts, for stimulating the brain under near-normal conditions, and for localizing the electrode subsequently. 2. Threshold currents measured under these conditions are lower than those required in acute preparations, or if the animal is restrained. 3. The results of stimulation are described for four common aspects of behaviour. These are antennal movement, locomotion, feeding and sexual behaviour. 4. The effect of stimulation on antennal and locomotory movements largely confirms previous work on crickets. 5. Feeding and foraging behaviour, which is a very common result, is shown to be almost completely determined by peripheral stimuli at the time of brain stimulation. The role of the latter is permissive or disinhibitory rather than causal or excitatory. 6. Integrated sexual behaviour is occasionally inhibited, but never elicited, by stimulation. This contrasts with observations on crickets, and its implications are discussed.

Foraging behaviour in East Asian desert rodents and its implications on coexistence

2016 ◽  
Vol 62 (3-4) ◽  
pp. 171-177 ◽  
Author(s):  
Ling-Ying Shuai ◽  
Yan-Ling Song ◽  
Burt P. Kotler ◽  
Keren Embar ◽  
Zhi-Gao Zeng
Keyword(s):  
Foraging Behaviour ◽  
Species Coexistence ◽  
Interspecific Interactions ◽  
Interference Competition ◽  
Foraging Efficiency ◽  
Gobi Desert ◽  
Patch Use ◽  
Desert Rodents ◽  
Daily Scale

We studied the foraging behaviour of two sympatric rodents (Meriones meridianus and Dipus sagitta) in the Gobi Desert, Northwestern China. The role of the foraging behaviour in promoting species coexistence was also examined. We used giving-up densities (GUDs) in artificial food patches to measure the patch use of rodents and video trapping to directly record the foraging behaviour, vigilance, and interspecific interactions. Three potential mechanisms of coexistence were evaluated (1) microhabitat partitioning; (2) spatial heterogeneity of resource abundance with a tradeoff in foraging efficiency vs. locomotion; and (3) temporal partitioning on a daily scale. Compared to M. meridianus, D. sagitta generally possessed lower GUDs, spent more time on patches, and conducted more visits per tray per capita, regardless of microhabitat. However, M. meridianus possessed advantages in average harvesting rates and direct interference against D. sagitta. Our results only partly support the third mechanism listed above. We propose another potential mechanism of coexistence: a tradeoff between interference competition and safety, with M. meridianus better at interference competition and D. sagitta better at avoiding predation risk. This mechanism is uncommon in previously studied desert rodent systems.

scholarly journals Transcriptional Control of Honey Bee (Apis mellifera) Major Royal Jelly Proteins by 20-Hydroxyecdysone

Insects ◽  
2018 ◽  
Vol 9 (3) ◽  
pp. 122 ◽  
Author(s):  
Paul Winkler ◽  
Frank Sieg ◽  
Anja Buttstedt
Keyword(s):  
Gene Expression ◽  
Apis Mellifera ◽  
Juvenile Hormone ◽  
Honey Bee ◽  
Honey Bees ◽  
Transcriptional Control ◽  
Royal Jelly ◽  
Adult Worker ◽  
Gene Expression Dynamics

One of the first tasks of worker honey bees (Apis mellifera) during their lifetime is to feed the larval offspring. In brief, young workers (nurse bees) secrete a special food jelly that contains a large amount of unique major royal jelly proteins (MRJPs). The regulation of mrjp gene expression is not well understood, but the large upregulation in well-fed nurse bees suggests a tight repression until, or a massive induction upon, hatching of the adult worker bees. The lipoprotein vitellogenin, the synthesis of which is regulated by the two systemic hormones 20-hydroxyecdysone and juvenile hormone, is thought to be a precursor for the production of MRJPs. Thus, the regulation of mrjp expression by the said systemic hormones is likely. This study focusses on the role of 20-hydroxyecdysone by elucidating its effect on mrjp gene expression dynamics. Specifically, we tested whether 20-hydroxyecdysone displayed differential effects on various mrjps. We found that the expression of the mrjps (mrjp1–3) that were finally secreted in large amounts into the food jelly, in particular, were down regulated by 20-hydroxyecdysone treatment, with mrjp3 showing the highest repression value.

The Role of Honey Bees Apis mellifera L. (Hymenoptera: Apidae) in Pollination of Apple

2004 ◽  
Vol 7 (3) ◽  
pp. 359-362 ◽  
Author(s):  
Muhammad Rahim Khan . ◽  
Muhammad Rafique Kha .
Keyword(s):  
Apis Mellifera ◽  
Honey Bees

scholarly journals Effect of pollination on rapeseed (Brassica campestris L. var. Toria) production in Chitwan, Nepal

2014 ◽  
Vol 15 ◽  
pp. 41-45 ◽  
Author(s):  
R Pudasaini ◽  
RB Thapa
Keyword(s):  
Apis Mellifera ◽  
Seed Set ◽  
Brassica Campestris ◽  
Apis Cerana ◽  
Control Plot ◽  
Mosquito Nets ◽  
Pollination Deficit ◽  
Natural Pollination ◽  
Important Cash Crop ◽  
And Control

Rapeseed is an important cash crop of Nepal and an experiment was conducted to study the effect of pollination on its production in Chitwan during 2012-2013. The experiment was designed in Randomized Complete Block with four replications and five pollination treatments. The rapeseed plots were caged with mosquito nets at 10% flowering except natural pollination. Two-framed colonies of Apis mellifera L. and Apis cerana F. were introduced separately for pollination, and control plot caged without pollinators. Seed set increased by 48.72% with Apis cerana F. and 45.73% with Apis mellifera L. pollination as compared to the control. The highest seed yield was obtained from Apis cerana F. (1.11 mt/ha), followed by Apis mellifera L. (0.88 mt/ha), hand (0.75 mt/ha), natural pollination (0.66 mt/ha) and control (0.13 mt/ha), respectively. This study clearly indicated pollination deficit under natural condition, and therefore, management of honeybee is necessary for higher production and productivity of rapeseed under Chitwan condition.

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