scholarly journals Lethal and sublethal effects of azadirachtin on the bumblebee Bombus terrestris (Hymenoptera: Apidae)

Ecotoxicology ◽  
2014 ◽  
Vol 24 (1) ◽  
pp. 130-142 ◽  
Author(s):  
Wagner Faria Barbosa ◽  
Laurens De Meyer ◽  
Raul Narciso C. Guedes ◽  
Guy Smagghe
Keyword(s):  
Sublethal Effects ◽  
Bombus Terrestris

scholarly journals The effects of the neonicotinoid imidacloprid on gene expression and DNA methylation in the buff-tailed bumblebee Bombus terrestris

2019 ◽  
Vol 286 (1905) ◽  
pp. 20190718 ◽  
Author(s):  
P. S. A. Bebane ◽  
B. J. Hunt ◽  
M. Pegoraro ◽  
A. R. C Jones ◽  
H. Marshall ◽  
...  
Keyword(s):  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Low Doses ◽  
Large Array ◽  
Epigenetic Changes ◽  
Rna Seq ◽  
Nicotinic Acetylcholine ◽  
Horticultural Crops ◽  
Highly Expressed Genes ◽  
And Control

Neonicotinoids are effective insecticides used on many important arable and horticultural crops. They are nicotinic acetylcholine receptor agonists which disrupt the function of insect neurons and cause paralysis and death. In addition to direct mortality, there are numerous sublethal effects of low doses of neonicotinoids on bees. We hypothesize that some of these large array of effects could be a consequence of epigenetic changes in bees induced by neonicotinoids. We compared whole methylome (BS-seq) and RNA-seq libraries of the brains of buff-tailed bumblebee Bombus terrestris workers exposed to field-realistic doses of the neonicotinoid imidacloprid to libraries from control workers. We found numerous genes which show differential expression between neonicotinoid-treated bees and control bees, but no differentially methylated cytosines in any context. We found CpG methylation to be focused mainly in exons and associated with highly expressed genes. We discuss the implications of our results for future legislation.

scholarly journals The effects of the neonicotinoid imidacloprid on gene expression and DNA methylation in the buff-tailed bumblebee Bombus terrestris

2019 ◽  
Author(s):  
P.S.A Bebane ◽  
B.J. Hunt ◽  
M. Pegoraro ◽  
A.R.C Jones ◽  
H. Marshall ◽  
...  
Keyword(s):  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Low Doses ◽  
Large Array ◽  
Epigenetic Changes ◽  
Rna Seq ◽  
Nicotinic Acetylcholine ◽  
Horticultural Crops ◽  
Highly Expressed Genes ◽  
And Control

AbstractNeonicotinoids are effective insecticides used on many important arable and horticultural crops. They are nicotinic acetylcholine receptor agonists which disrupt the function of insect neurons and cause paralysis and death. In addition to direct mortality, there are numerous sublethal effects of low doses of neonicotinoids on bees. We hypothesize that some of these large array of effects could be a consequence of epigenetic changes in bees induced by neonicotinoids. We compared whole methylome (BS-seq) and RNA-seq libraries of the brains of buff tailed bumblebee Bombus terrestris workers exposed to field realistic doses of the neonicotinoid imidacloprid to libraries from control workers. We found numerous genes which show differential expression between neonicotinoid treated bees and control bees, but no differentially methylated cytosines in any context. We found CpG methylation to be focused mainly in exons and associated with highly expressed genes. We discuss the implications of our results for future legislation.

Compatibility of traditional and novel acaricides with bumblebees (Bombus terrestris): a first laboratory assessment of toxicity and sublethal effects

2010 ◽  
Vol 66 (7) ◽  
pp. 786-793 ◽  
Author(s):  
Linde Besard ◽  
Veerle Mommaerts ◽  
Jessica Vandeven ◽  
Xavier Cuvelier ◽  
Guido Sterk ◽  
...  
Keyword(s):  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Laboratory Assessment

scholarly journals Sublethal effects of kaolin and the biopesticides Prestop-Mix and BotaniGard on metabolic rate, water loss and longevity in bumble bees (Bombus terrestris)

2015 ◽  
Vol 89 (1) ◽  
pp. 171-178 ◽  
Author(s):  
Reet Karise ◽  
Riin Muljar ◽  
Guy Smagghe ◽  
Tanel Kaart ◽  
Aare Kuusik ◽  
...  
Keyword(s):  
Metabolic Rate ◽  
Water Loss ◽  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Bumble Bees

scholarly journals No evidence for neonicotinoid preferences in the bumblebee Bombus impatiens

2020 ◽  
Vol 7 (5) ◽  
pp. 191883
Author(s):  
Felicity Muth ◽  
Rebekah L. Gaxiola ◽  
Anne S. Leonard
Keyword(s):  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Underlying Mechanism ◽  
Bombus Impatiens ◽  
Ecological Implication ◽  
Wild Populations ◽  
Foraging Preferences ◽  
Feeding Motivation ◽  
Nectar Sugar ◽  
Neonicotinoid Pesticides

Neonicotinoid pesticides can have a multitude of negative sublethal effects on bees. Understanding their impact on wild populations requires accurately estimating the dosages bees encounter under natural conditions. This is complicated by the possibility that bees might influence their own exposure: two recent studies found that bumblebees ( Bombus terrestris ) preferentially consumed neonicotinoid-contaminated nectar, even though these chemicals are thought to be tasteless and odourless. Here, we used Bombus impatiens to explore two elements of these reported preferences, with the aim of understanding their ecological implication and underlying mechanism. First, we asked whether preferences persisted across a range of realistic nectar sugar concentrations, when measured at a series of time points up until 24 h. Second, we tested whether bees' neonicotinoid preferences were driven by an ability to associate their post-ingestive consequences with floral stimuli such as colour, location or scent. We found no evidence that foragers preferred to consume neonicotinoid-containing solutions, despite finding effects on feeding motivation and locomotor activity in line with previous work. Bees also did not preferentially visit floral stimuli previously paired with a neonicotinoid-containing solution. These results highlight the need for further research into the mechanisms underlying bees’ responses to these pesticides, critical for determining how neonicotinoid-driven foraging preferences might operate in the real world for different bee species.

The effects of single and mixed infections ofApicystis bombiand deformed wing virus inBombus terrestris

Parasitology ◽  
2015 ◽  
Vol 143 (3) ◽  
pp. 358-365 ◽  
Author(s):  
PETER GRAYSTOCK ◽  
IVAN MEEUS ◽  
GUY SMAGGHE ◽  
DAVE GOULSON ◽  
WILLIAM O. H. HUGHES
Keyword(s):  
Honey Bees ◽  
Sublethal Effects ◽  
Bombus Terrestris ◽  
Lethal Effect ◽  
Mixed Infections ◽  
Negative Effects ◽  
Experimental Exposure ◽  
Deformed Wing Virus ◽  
Conservation Concern ◽  
First Time

SUMMARYMany pollinators are currently suffering from declines, diminishing their gene pool and increasing their vulnerability to parasites. Recently, an increasing diversity of parasites has been recorded in bumblebees, yet for many, knowledge of their virulence and hence the risk their presence poses, is lacking. The deformed wing virus (DWV), known to be ubiquitous in honey bees, has now been detected in bumblebees. In addition, the neogregarineApicystis bombihas been discovered to be more prevalent than previously thought. Here, we assess for the first time the lethal and sublethal effects of these parasites during single and mixed infections of worker bumblebees (Bombus terrestris). Fifteen days after experimental exposure, 22% of bees exposed toA. bombi, 50% of bees exposed to DWV and 86% of bees exposed to both parasites had died. Bumblebees that had ingestedA. bombihad increased sucrose sensitivity (SS) and a lower lipid:body size ratio than control bees. While dual infected bumblebees showed no increase in SS. Overall, we find thatA. bombiexhibits both lethal and sublethal effects. DWV causes lethal effect and may reduce the sub lethal effects imposed byA. bombi. The results show that both parasites have significant, negative effects on bumblebee health, making them potentially of conservation concern.

Examining Sublethal Effects of Anticoagulant Rodenticides on Haemosporidian Parasitemia and Body Condition in Migratory Red-Tailed Hawks

2019 ◽  
Vol 53 (4) ◽  
pp. 402 ◽  
Author(s):  
Laura A. Kwasnoski ◽  
Kristina A. Dudus ◽  
Allen M. Fish ◽  
Emily V. Abernathy ◽  
Christopher W. Briggs
Keyword(s):  
Body Condition ◽  
Sublethal Effects ◽  
Anticoagulant Rodenticides

Marine Quality Standards: Their Derivation and Application in the United Kingdom

1985 ◽  
Vol 17 (6-7) ◽  
pp. 1187-1198 ◽  
Author(s):  
G. Mance ◽  
A. R. O'Donnell
Keyword(s):  
Coastal Waters ◽  
Sublethal Effects ◽  
Quality Standards ◽  
Toxicity Data ◽  
Marine Life ◽  
Nickel Zinc ◽  
The United Kingdom ◽  
The Common ◽  
Lead Nickel ◽  
The Impact

This paper discusses the derivation of environmental quality standards for coastal waters and the difficulties of using such standards for controlling industrial discharges. Attention is focused on the common List II substances, copper, chromium, lead, nickel, zinc and arsenic - and their effects on marine life. The adequacy of existing toxicity data is discussed and it is concluded that long exposure tests are required to provide information on sublethal effects. Such data are currently limited. It is also important that consideration be given to the effects that reducing salinities and increasing temperatures have in increasing the toxicity of these substances. The complexity of interpreting the results of laboratory toxicity data to coastal waters is discussed with reference to a study of the impact of an industrial discharge.

Sign in / Sign up

Export Citation Format

Share Document