Publications by authors named "Anne-Claire Martel"
Declines in insect pollinators have been linked to a range of causative factors such as disease, loss of habitats, the quality and availability of food, and exposure to pesticides. Here, we analysed an extensive dataset generated from pesticide screening of foraging insects, pollen-nectar stores/beebread, pollen and ingested nectar across three species of bees collected at 128 European sites set in two types of crop. In this paper, we aimed to (i) derive a new index to summarise key aspects of complex pesticide exposure data and (ii) understand the links between pesticide exposures depicted by the different matrices, bee species and apple orchards versus oilseed rape crops.
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- Honey bee colonies are likely to experience co-exposure to pesticides and viruses, particularly thiamethoxam and Chronic bee paralysis virus (CBPV), which can affect their health and survival.
- A study found that while co-exposure didn't significantly affect bee survival or their ability to break down thiamethoxam, it did increase CBPV loads to levels typically seen in severe infections.
- The impact of this co-exposure may vary with the season, as bees in spring and summer are more commonly exposed and have different physiological responses than the winter bees studied.
Article Synopsis
- A study conducted from 2002 to 2005 analyzed 44 pesticides in honeybee-related samples from five French locations, focusing on matrices like honey, pollen, and beeswax.
- The results indicated that pollen loads and beeswax showed the highest levels of pesticide presence, while honey had the least.
- Pollen loads were deemed the most effective matrix for environmental pesticide residue assessment due to their high frequency of occurrence and ease of collection.
Article Synopsis
- A 3-year field survey in France (2002-2005) investigated the health of honey bee colonies (Apis mellifera) in relation to pesticide residues found in honey, pollen, and beeswax, amidst concerns over significant bee population losses.
- The study measured the presence of various pesticide residues, primarily imidacloprid and 6-chloronicotinic acid, and found that while some residues were detected, they varied in concentration; over 12% of sampling periods showed no pesticide presence at all.
- Ultimately, the analysis revealed no significant statistical relationship between pesticide residues and colony mortality or the populations of adult bees and brood, indicating further research is needed to understand how these residues may impact bee health.
In 2002, a field survey was initiated on French apiaries to monitor weakness of honey bee, Apis mellifera L., colonies. Apiaries were evenly distributed in five sites located on continental France.
View Article and Find Full Text PDFTwo groups of eight honey bee colonies were fed with two different concentrations of imidacloprid in saccharose syrup during summer (each colony was given 1 litre of saccharose syrup containing 0.5 microg litre(-1) or 5 microg litre(-1) of imidacloprid on 13 occasions). Their development and survival were followed in parallel with control hives (unfed or fed with saccharose syrup) until the end of the following winter.
View Article and Find Full Text PDFRapid analytical methods are described to control quality of honeys, concerning residues of acaricides applied in hives to prevent Varroa jacobsoni infestation. A liquid-liquid extraction with hexane-propanol-2-ammonia (60 ml:30 ml:0.28%) was used for the simultaneous analysis of coumaphos, bromopropylate, amitraz and fluvalinate.
View Article and Find Full Text PDFThis review covers mainly publications that appeared in Analytical Abstracts (Royal Society of Chemistry) from January 1990 to February 2001. The number of publications on this topic continues to grow, and during the past three years (1998-2000) about 150 reviews and/or overviews have been published in the area of food. Numerous techniques and food matrices or chemical components are presented and discussed in these reviews.
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