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Article ; Online: Bumblebees show capacity for behavioral traditions.

Muth, Felicity

2023

Abstract: A new study shows that bumblebees learn socially, and this resulted in a novel behavior becoming dominant across a group. These findings highlight the opportunity going forward to use social insects to address how simple cognitive mechanisms can underpin ...

Abstract	A new study shows that bumblebees learn socially, and this resulted in a novel behavior becoming dominant across a group. These findings highlight the opportunity going forward to use social insects to address how simple cognitive mechanisms can underpin the development of complex behavioral phenomena.
Language	English
Publishing date	2023-07-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	2048665-0
ISSN	1543-4508 ; 1543-4494
ISSN (online)	1543-4508
ISSN	1543-4494
DOI	10.3758/s13420-023-00594-0
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Intra-specific differences in cognition: bumblebee queens learn better than workers.

Muth, Felicity

Biology letters

2021 Volume 17, Issue 8, Page(s) 20210280

Abstract: Species' cognitive traits are shaped by their ecology, and even within a species, cognition can reflect the behavioural requirements of individuals with different roles. Social insects have a number of discrete roles (castes) within a colony and thus ... ...

Abstract	Species' cognitive traits are shaped by their ecology, and even within a species, cognition can reflect the behavioural requirements of individuals with different roles. Social insects have a number of discrete roles (castes) within a colony and thus offer a useful system to determine how ecological requirements shape cognition. Bumblebee queens are a critical point in the lifecycle of their colony, since its future success is reliant on a single individual's ability to learn about floral stimuli while finding a suitable nest site; thus, one might expect particularly adept learning capabilities at this stage. I compared wild
MeSH term(s)	Animals ; Bees ; Cognition ; Learning
Language	English
Publishing date	2021-08-11
Publishing country	England
Document type	Journal Article
ZDB-ID	2135022-X
ISSN	1744-957X ; 1744-9561
ISSN (online)	1744-957X
ISSN	1744-9561
DOI	10.1098/rsbl.2021.0280
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 1364 -Letters-: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.A 6024: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)

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Article: Judgement bias may be explained by shifts in stimulus response curves.

Strang, Caroline / Muth, Felicity

Royal Society open science

2023 Volume 10, Issue 4, Page(s) 221322

Abstract: Judgement bias, or 'optimism' and 'pessimism', has been demonstrated across many taxa, yet the cognitive mechanisms underlying this behaviour remain unclear. In an optimism paradigm, animals are trained to an association, and, if given a positive ... ...

Abstract	Judgement bias, or 'optimism' and 'pessimism', has been demonstrated across many taxa, yet the cognitive mechanisms underlying this behaviour remain unclear. In an optimism paradigm, animals are trained to an association, and, if given a positive experience, behave more favourably towards 'ambiguous' stimuli. We tested whether this effect could be explained by changes to stimulus response gradients by giving bees a task where their response was tested across a wider gradient of stimuli than typically tested. In line with previous work, we found that bees given a positive experience demonstrated judgement bias, being more likely to visit ambiguous stimuli. However, bees were also less likely to visit a stimulus on the other side of the rewarded stimulus (S+), and as such had a shifted stimulus response curve, showing a diminished peak shift response. In two follow-up experiments we tested the hypothesis that our manipulation altered bees' stimulus response curves via changes to the peak shift response by reducing peak shift in controls. We found that, in support of our hypothesis, elimination of peak shift also eliminated differences between treatments. Our results point towards a cognitive explanation of 'optimistic' behaviour in non-human animals and offer a new paradigm for considering emotion-like states.
Language	English
Publishing date	2023-04-05
Publishing country	England
Document type	Journal Article
ZDB-ID	2787755-3
ISSN	2054-5703
ISSN	2054-5703
DOI	10.1098/rsos.221322
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Article ; Online: Judgement bias may be explained by shifts in stimulus response curves

Caroline Strang / Felicity Muth

Royal Society Open Science, Vol 10, Iss

2023 Volume 4

Abstract: Judgement bias, or ‘optimism’ and ‘pessimism’, has been demonstrated across many taxa, yet the cognitive mechanisms underlying this behaviour remain unclear. In an optimism paradigm, animals are trained to an association, and, if given a positive ... ...

Abstract	Judgement bias, or ‘optimism’ and ‘pessimism’, has been demonstrated across many taxa, yet the cognitive mechanisms underlying this behaviour remain unclear. In an optimism paradigm, animals are trained to an association, and, if given a positive experience, behave more favourably towards ‘ambiguous’ stimuli. We tested whether this effect could be explained by changes to stimulus response gradients by giving bees a task where their response was tested across a wider gradient of stimuli than typically tested. In line with previous work, we found that bees given a positive experience demonstrated judgement bias, being more likely to visit ambiguous stimuli. However, bees were also less likely to visit a stimulus on the other side of the rewarded stimulus (S+), and as such had a shifted stimulus response curve, showing a diminished peak shift response. In two follow-up experiments we tested the hypothesis that our manipulation altered bees’ stimulus response curves via changes to the peak shift response by reducing peak shift in controls. We found that, in support of our hypothesis, elimination of peak shift also eliminated differences between treatments. Our results point towards a cognitive explanation of ‘optimistic’ behaviour in non-human animals and offer a new paradigm for considering emotion-like states.
Keywords	cognitive bias ; optimism ; peak shift ; Bombus impatiens ; bumblebee ; bee ; Science ; Q
Subject code	150
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	The Royal Society
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Label-based expectations affect incentive contrast effects in bumblebees.

Hemingway, Claire T / Muth, Felicity

Biology letters

2022 Volume 18, Issue 3, Page(s) 20210549

Abstract: While classic models of animal decision-making assume that individuals assess the absolute value of options, decades of research have shown that rewards are often evaluated relative to recent experience, creating incentive contrast effects. Contrast ... ...

Abstract	While classic models of animal decision-making assume that individuals assess the absolute value of options, decades of research have shown that rewards are often evaluated relative to recent experience, creating incentive contrast effects. Contrast effects are often assumed to be purely sensory, yet consumer and experimental psychology tell us that label-based expectations can affect value perception in humans and rodents. However, this has rarely been tested in non-model systems. Bumblebees forage on a variety of flowers that vary in their signals and rewards and show contrast when rewards are lowered. We manipulated bees' expectations of stimulus quality, before downshifting the reward to induce incentive contrast. We found that contrast effects were not solely driven by experience with a better reward, but also influenced by experience with associated stimuli. While bees' initial response did not differ between treatments, individuals were faster to accept the lower-quality reward when it was paired with a novel stimulus. We explored the boundaries of these label-based expectations by testing bees along a stimulus gradient and found that expectations generalized to similar stimuli. Such reference-dependent evaluations may play an important role in bees' foraging choices, with the potential to impact floral evolution and plant community dynamics.
MeSH term(s)	Animals ; Bees ; Flowers ; Motivation
Language	English
Publishing date	2022-03-09
Publishing country	England
Document type	Journal Article
ZDB-ID	2135022-X
ISSN	1744-957X ; 1744-9561
ISSN (online)	1744-957X
ISSN	1744-9561
DOI	10.1098/rsbl.2021.0549
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 1364 -Letters-: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.A 6024: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)

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Article ; Online: Exposure to the novel insecticide flupyradifurone impairs bumblebee feeding motivation, learning, and memory retention.

Siviter, Harry / Muth, Felicity

Environmental pollution (Barking, Essex : 1987)

2022 Volume 307, Page(s) 119575

Abstract: Bees are vital pollinators of crops and wildflowers and as such, wild bee declines threaten food security and functioning ecosystems. One driver of bee declines is the use of systemic insecticides, such as commonly used neonicotinoids. However, rising ... ...

Abstract	Bees are vital pollinators of crops and wildflowers and as such, wild bee declines threaten food security and functioning ecosystems. One driver of bee declines is the use of systemic insecticides, such as commonly used neonicotinoids. However, rising pest resistance to neonicotinoids, and restrictions on their use in the EU, has increased the demand for replacement insecticides to control crop pests. Flupyradifurone is a novel systemic insecticide that is thought to be relatively 'bee safe' although it can be present in the nectar and pollen of bee-attractive crops. Bumblebees rely on learning to forage efficiently, and thus detriments to learning performance may have downstream consequences on their ability to forage. While neonicotinoids negatively influence bumblebee learning and memory, whether this is also the case for their replacements is unclear. Here, we exposed bumblebees (Bombus impatiens) to an acute, field-realistic dose of flupyradifurone before training them to learn either an olfactory or colour association. We found that flupyradifurone impaired bumblebees' learning and memory performance in both olfactory and visual modalities. Flupyradifurone-treated bees were also less motivated to feed. Given the similarity between the detriments to cognition found here and those previously reported for neonicotinoids, this implies that these insecticides may have similar sub-lethal effects on bees. Restrictions on neonicotinoid use are therefore unlikely to benefit bees if novel insecticides like flupyradifurone are used as an alternative, highlighting that current agrochemical risk assessments are not protecting bees from the unwanted consequences of pesticide use. Sub-lethal assessments on non-Apis bees should be made mandatory in agrochemical regulation to ensure that novel insecticides are indeed 'bee safe'.
MeSH term(s)	4-Butyrolactone/analogs & derivatives ; Animals ; Bees ; Ecosystem ; Insecticides/toxicity ; Motivation ; Neonicotinoids ; Pyridines
Chemical Substances	Insecticides ; Neonicotinoids ; Pyridines ; flupyradifurone (8H7JT159D0) ; 4-Butyrolactone (OL659KIY4X)
Language	English
Publishing date	2022-06-09
Publishing country	England
Document type	Journal Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2022.119575
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Zs.A 2599: Show issues

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Article ; Online: Pesticide licensing in the EU and protecting pollinators.

Siviter, Harry / Linguadoca, Alberto / Ippolito, Alessio / Muth, Felicity

Current biology : CB

2023 Volume 33, Issue 2, Page(s) R44–R48

Abstract: Intensive agriculture is reliant on pesticides to control crop pests, but these chemicals can have negative environmental consequences. This has resulted in repeated calls for pesticide risk assessments to be modified to better protect ecosystem services ...

Abstract	Intensive agriculture is reliant on pesticides to control crop pests, but these chemicals can have negative environmental consequences. This has resulted in repeated calls for pesticide risk assessments to be modified to better protect ecosystem services such as pollination. However, the pesticide licensing process is complex, and consequently there is often confusion between risk assessments where the environmental impact of pesticide use is considered, and risk management where licensing decisions are made. Using bees as a case study, we provide a roadmap for how pesticides are licensed for use in the European Union. By outlining the regulatory process, we highlight key data gaps that need to be addressed to generate a holistic approach to environmental risk assessment. Such an approach is vital to protect pollinators and wildlife more broadly from the unintended consequences of pesticide use.
MeSH term(s)	Bees ; Animals ; Pesticides ; Ecosystem ; Agriculture/methods ; Environment ; Risk Assessment ; Pollination
Chemical Substances	Pesticides
Language	English
Publishing date	2023-01-24
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	1071731-6
ISSN	1879-0445 ; 0960-9822
ISSN (online)	1879-0445
ISSN	0960-9822
DOI	10.1016/j.cub.2022.12.002
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Zs.A 3208: Show issues

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bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)

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Article: Exposure to the novel insecticide flupyradifurone impairs bumblebee feeding motivation, learning, and memory retention

Siviter, Harry / Muth, Felicity

Environmental pollution. 2022 Aug. 15, v. 307

2022

Abstract	Bees are vital pollinators of crops and wildflowers and as such, wild bee declines threaten food security and functioning ecosystems. One driver of bee declines is the use of systemic insecticides, such as commonly used neonicotinoids. However, rising pest resistance to neonicotinoids, and restrictions on their use in the EU, has increased the demand for replacement insecticides to control crop pests. Flupyradifurone is a novel systemic insecticide that is thought to be relatively ‘bee safe’ although it can be present in the nectar and pollen of bee-attractive crops. Bumblebees rely on learning to forage efficiently, and thus detriments to learning performance may have downstream consequences on their ability to forage. While neonicotinoids negatively influence bumblebee learning and memory, whether this is also the case for their replacements is unclear. Here, we exposed bumblebees (Bombus impatiens) to an acute, field-realistic dose of flupyradifurone before training them to learn either an olfactory or colour association. We found that flupyradifurone impaired bumblebees' learning and memory performance in both olfactory and visual modalities. Flupyradifurone-treated bees were also less motivated to feed. Given the similarity between the detriments to cognition found here and those previously reported for neonicotinoids, this implies that these insecticides may have similar sub-lethal effects on bees. Restrictions on neonicotinoid use are therefore unlikely to benefit bees if novel insecticides like flupyradifurone are used as an alternative, highlighting that current agrochemical risk assessments are not protecting bees from the unwanted consequences of pesticide use. Sub-lethal assessments on non-Apis bees should be made mandatory in agrochemical regulation to ensure that novel insecticides are indeed ‘bee safe’.
Keywords	Bombus impatiens ; agrochemicals ; bees ; cognition ; color ; food security ; memory ; motivation ; nectar ; neonicotinoid insecticides ; pest resistance ; pollen ; pollution ; risk
Language	English
Dates of publication	2022-0815
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2022.119575
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Do novel insecticides pose a threat to beneficial insects?

Siviter, Harry / Muth, Felicity

Proceedings. Biological sciences

2020 Volume 287, Issue 1935, Page(s) 20201265

Abstract: Systemic insecticides, such as neonicotinoids, are a major contributor towards beneficial insect declines. This has led to bans and restrictions on neonicotinoid use globally, most noticeably in the European Union, where four commonly used neonicotinoids ...

Abstract	Systemic insecticides, such as neonicotinoids, are a major contributor towards beneficial insect declines. This has led to bans and restrictions on neonicotinoid use globally, most noticeably in the European Union, where four commonly used neonicotinoids (imidacloprid, thiamethoxam, clothianidin and thiacloprid) are banned from outside agricultural use. While this might seem like a victory for conservation, restrictions on neonicotinoid use will only benefit insect populations if newly emerging insecticides do not have similar negative impacts on beneficial insects. Flupyradifurone and sulfoxaflor are two novel insecticides that have been registered for use globally, including within the European Union. These novel insecticides differ in their chemical class, but share the same mode of action as neonicotinoids, raising the question as to whether they have similar sub-lethal impacts on beneficial insects. Here, we conducted a systematic literature search of the potential sub-lethal impacts of these novel insecticides on beneficial insects, quantifying these effects with a meta-analysis. We demonstrate that both flupyradifurone and sulfoxaflor have significant sub-lethal impacts on beneficial insects at field-realistic levels of exposure. These results confirm that bans on neonicotinoid use will only protect beneficial insects if paired with significant changes to the agrochemical regulatory process. A failure to modify the regulatory process will result in a continued decline of beneficial insects and the ecosystem services on which global food production relies.
MeSH term(s)	4-Butyrolactone/analogs & derivatives ; Animals ; Ecosystem ; Guanidines ; Insecta ; Insecticides ; Neonicotinoids ; Nitro Compounds ; Pyridines ; Sulfur Compounds ; Thiamethoxam ; Thiazines ; Thiazoles
Chemical Substances	Guanidines ; Insecticides ; Neonicotinoids ; Nitro Compounds ; Pyridines ; Sulfur Compounds ; Thiazines ; Thiazoles ; clothianidin (2V9906ABKQ) ; imidacloprid (3BN7M937V8) ; sulfoxaflor (671W88OY8K) ; Thiamethoxam (747IC8B487) ; flupyradifurone (8H7JT159D0) ; thiacloprid (DSV3A944A4) ; 4-Butyrolactone (OL659KIY4X)
Language	English
Publishing date	2020-09-30
Publishing country	England
Document type	Journal Article
ZDB-ID	209242-6
ISSN	1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
ISSN (online)	1471-2954
ISSN	0080-4649 ; 0962-8452 ; 0950-1193
DOI	10.1098/rspb.2020.1265
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 1364: Show issues

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Article ; Online: Discovery of octopamine and tyramine in nectar and their effects on bumblebee behavior.

Muth, Felicity / Philbin, Casey S / Jeffrey, Christopher S / Leonard, Anne S

iScience

2022 Volume 25, Issue 8, Page(s) 104765

Abstract: Nectar chemistry can influence the behavior of pollinators in ways that affect pollen transfer, yet basic questions about how nectar chemical diversity impacts plant-pollinator relationships remain unexplored. For example, plants' capacity to produce ... ...

Abstract	Nectar chemistry can influence the behavior of pollinators in ways that affect pollen transfer, yet basic questions about how nectar chemical diversity impacts plant-pollinator relationships remain unexplored. For example, plants' capacity to produce neurotransmitters and endocrine disruptors may offer a means to manipulate pollinator behavior. We surveyed 15 plant species and discovered that two insect neurotransmitters, octopamine and tyramine, were widely distributed in floral nectar. We detected the highest concentration of these chemicals in
Language	English
Publishing date	2022-07-16
Publishing country	United States
Document type	Journal Article
ISSN	2589-0042
ISSN (online)	2589-0042
DOI	10.1016/j.isci.2022.104765
Database	MEDical Literature Analysis and Retrieval System OnLINE

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