PubMed Journals Articles About "Pesticides Cause Bumblebees Lose Their Buzz Study Finds" RSS

09:19 EDT 25th September 2018 | BioPortfolio

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Showing "Pesticides Cause Bumblebees Lose Their Buzz Study Finds" PubMed Articles 1–25 of 60,000+

Nectar foragers contribute to the pollination of buzz-pollinated plant species.

Pollination performance may depend on the type of floral resource (pollen or nectar) foraged by visitors. In buzz-pollinated plant species, the poricidal anthers release pollen during active pollen collection that induces flower vibrations. These buzz-pollinated species generally do not produce nectar. Nevertheless, several Ericaceae are buzz-pollinated and produce nectar. We estimated the relative effectiveness of visitors according to the type of resource collected, nectar or pollen (buzzing).

Desire to lose weight, dietary intake and psychological correlates among middle-aged and older women. The CoLaus study.

Body dissatisfaction has been regularly associated with negative consequences on health of young women, but less is known regarding middle-aged or older women. However, body dissatisfaction in women has been seen for long as a "normative discontent" (i.e. widespread and chronic dissatisfaction) because of its high prevalence among all age categories. The goal of this study was to explore the relationships between the desire to lose weight, energy intake and psychological health in community-dwelling women i...

Bottlenose dolphin (Tursiops truncatus) sonar slacks off before touching a non-alimentary target.

Odontocetes modulate the rhythm of their echolocation clicks to draw information about their environment. When they approach preys to capture, they speed up their emissions to increase the sampling rate of "distant touch" and improve information update. This global acceleration turns into a "terminal buzz" also described in bats, which is a click train with drastic increase in rate, just as reaching the prey. This study documents and analyses under human care bottlenose dolphins' echolocation activity, when...

Hazardous effects of chemical pesticides on human health-Cancer and other associated disorders.

Poisoning from pesticides is a global public health problem and accounts for nearly 300,000 deaths worldwide every year. Exposure to pesticides is inevitable; there are different modes through which humans get exposed to pesticides. The mode of exposure is an important factor as it also signifies the concentration of pesticides exposure. Pesticides are used extensively in agricultural and domestic settings. These chemicals are believed to cause many disorders in humans and wildlife. Research from past few d...

Occurrence and distribution of pesticides in precipitation as revealed by targeted screening through GC-MS/MS.

Facing the tough challenge of precise measurement of ever-increasing numbers of organic contaminants in the environment, there is an urgent need for more reliable and cost-effective methodologies. In this study, we developed and validated a screening method for analysis of over 450 pesticides in precipitation using gas chromatography with tandem mass spectrometry (GC-MS/MS) in multiple reaction monitoring (MRM) mode. Solid phase extraction (SPE) was applied to extract target analytes from precipitation. Usi...

Buzz Kill.

GC-MS/MS determination and ecological risk assessment of pesticides in aquatic system: A case study in Hooghly River basin in West Bengal, India.

A liquid-liquid extraction (LLE) for water and modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for sediment combined with gas chromatography-tandem mass spectrometry (GC-MS/MS) detection in multiple reaction monitoring (MRM) mode was standardized for determination of 31 pesticides. Performance characteristics for the selected pesticides were acceptable according to European Commission's (EC) guidelines for method validation (recovery 70-120%, RSD

Detection of Pesticide Residues in Selected Bee Products of Honeybees (Apis melllifera L.) Colonies in a Preliminary Study from Seychelles Archipelago.

Pesticide residues in honey and pollen from Seychelles against a target of 108 pesticides using LC-MS/MS were analyzed. Fifteen pesticides were detected, at trace levels (

Deciphering the toxic effects of iprodione, a fungicide and malathion, an insecticide on thiol protease inhibitor isolated from yellow Indian mustard seeds.

Pesticides are being used globally to improve agricultural production. They are applied specifically to combat with pathogens that are a major threat for reduced optimum yield of crops. This study was carried out to see the effect of commercially used pesticides on a specific plant protein viz. phytocystatin isolated from yellow mustard seeds (YMP). Phytocystatin is a thiol proteinase inhibitor, which regulates endogenous and exogenous cysteine proteinases and plays a vital physiological role in plants. Dif...

Women see no benefit from colorectal cancer screening, study finds.

Physical activity reduces risk of depression at any age, finds study.

Levels of organochlorine pesticides in Amazon turtle (Podocnemis unifilis) in the Xingu River, Brazil.

Due to the toxicity and high environmental persistence of organochlorine pesticides in aquatic organisms, turtles have been studied as environment biomonitors. These animals are important sources of protein for the riverside and indigenous peoples of the Brazilian amazon. In the present study, organochlorine pesticide contamination was investigated in Podocnemis unifilis. Liver, muscle and fatty tissue samples were removed from 50 specimens collected from five sampling points located in the Xingu River basi...

Lesions of ventrolateral striatum eliminate lose-shift but not win-stay behaviour in rats.

Animals tend to repeat actions that are associated with reward delivery, whereas they tend to shift responses to alternate choices following reward omission. These so-called win-stay and lose-shift responses are employed by a wide range of animals in a variety of decision-making scenarios, and depend on dissociated regions of the striatum. Specifically, lose-shift responding is impaired by extensive excitotoxic lesions of the lateral striatum. Here we used focal lesions to assess whether dorsal and ventral ...

Assessment of the impact of three pesticides on microbial dynamics and functions in a lab-to-field experimental approach.

The toxicity of pesticides on soil microorganisms is as an emerging area of concern. Novel and well-standardized tools could be now used to provide a robust assessment of the ecotoxicity of pesticides on soil microorganisms. We followed a tiered lab-to-field approach to assess the toxicity of three pesticides, widely used at EU level, (chlorpyrifos (CHL), isoproturon (IPU) and tebuconazole (TBZ)) on (i) the abundance of 11 microbial taxa and 8 functional microbial groups via q-PCR and (ii) the activity of e...

Distribution and risk assessment of banned and other current-use pesticides in surface and groundwaters consumed in an agricultural catchment dominated by cocoa crops in the Ankobra Basin, Ghana.

The existence of pesticides, such as organochlorine pesticides, parathion-ethyl, methamidophos which is banned globally and some current-use non-banned pesticides of organophosphorus and synthetic pyrethroids in freshwater sources is an ecological and public health concern in many countries, including Ghana. Prompted by this concern, the exposure levels and risk assessment of these pesticides to humans and non-target organisms via groundwater and surface water sources in an agricultural catchment dominated ...

The role of spatial texture in visual control of bumblebee learning flights.

When leaving the nest for the first time, bees and wasps perform elaborate learning flights, during which the location of the nest is memorised. These flights are characterised by a succession of arcs or loops of increasing radius centred around the nest, with an incremental increase in ground speed, which requires precise control of the flight manoeuvres by the insect. Here, we investigated the role of optic flow cues in the control of learning flights by manipulating spatial texture in the ventral and pan...

Isolated hypospadias: The impact of prenatal exposure to pesticides, as determined by meconium analysis.

Although endocrine-disrupting chemicals (EDCs, including pesticides) are thought to increase the risk of hypospadias, no compounds have been formally identified in this context. Human studies may now be possible via the assessment of meconium as a marker of chronic prenatal exposure. The objective of the present study was to determine whether or not prenatal exposure to pesticides (as detected in meconium) constitutes a risk factor for isolated hypospadias. In a case-control study performed between 2011 and...

A nested case-control study of polychlorinated biphenyls, organochlorine pesticides, and thyroid cancer in the Janus Serum Bank cohort.

Polychlorinated biphenyls (PCBs) and organochlorine pesticides have been associated with altered thyroid hormone levels in humans, but their relationship with thyroid cancer is unknown.

Diabetes: simple patient characteristics should help inform choice of second line drug, study finds.

Preliminary Assessment of Legacy and Current-Use Pesticides in Franciscana Dolphins from Argentina.

The change towards intensive agriculture has led to an increase in the use of pesticides. In addition, legacy pesticides, such as organochlorines are still present in the environment. Ten Franciscana dolphins were accidentally killed by netting in a coastal area of Argentina in Buenos Aires province. From these animals, organochlorine, organophosphate and pyrethroid pesticides were analyzed in liver, bubbler and melon tissues. The concentrations of Σendosulfan ranged from not detectable values (nd) to 3539...

Inhibition effects of pesticides on glutathione-S-transferase enzyme activity of Van Lake fish liver.

Glutathione-S-transferases (GSTs) have a function in xenobiotic metabolism. They are a significant multifunctional family with a wide variety of catalytic activities. In the current study, we determined in vitro inhibition effects of 2,4-dichlorophenoxyacetic acid dimethylamine salt (2,4-D DMA), haloxyfop-P-methyl, glyphosate isopropylamine, dichlorvos, and λ-cyhalothrin on purified GST. For this purpose, GST were purified from Van Lake fish (Chalcalburnus tarichii Pallas) liver with 29.25 EU mg specific ...

NewsCAP: Study finds that NPs, physicians, and physician assistants (PAs) in the VA system provide comparable diabetes management.

Distribution of cyanobacteria and their interactions with pesticides in paddy field: A comprehensive review.

Cyanobacteria, also known as blue green algae are one of the important ubiquitous oxygen evolving photosynthetic prokaryotes and ultimate source of nitrogen for paddy fields since decades. In past two decades, indiscriminated use of pesticides led to biomagnification that intensively harm the structure and soil functions of soil microbes including cyanobacteria. Cyanobacterial abundance biomass, short generation, water holding capacity, mineralizing capacity and more importantly nitrogen fixing have enormou...

Stakeholders analysis of merging social health insurance funds in Iran: what kind of interests they may gain or lose?

Iran passed a Law in 2010 to merge all existing health insurance funds physically together. This stakeholder analysis aimed at revealing that what benefits the stakeholders might lose or gain as a result of merging health insurance schemes in Iran, which make them to oppose or support it. This was a qualitative study conducted in 2014. Sixty semi-structured face-to-face interviews were conducted. Purposive and snowball samplings with maximum heterogeneity samples were used for selecting interviewees. Govern...

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water.

Recent research has demonstrated the potential of using filamentous fungi to form pellets with microalgae (biopellets), in order to facilitate harvesting of microalgae from water following algae-based treatment of wastewater. In parallel, there is a need to develop techniques for removing organic pollutants such as pesticides and pharmaceuticals from wastewater. In experiments using the microalga Chlorella vulgaris, the filamentous fungus Aspergillus niger and biopellets composed of these microorganisms, th...

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