Age-mediated and environmentally mediated brain and behavior plasticity in the stingless bee Melipona quadrifasciata anthidioides

Tomé, Hudson V. V.; Rosi-Denadai, Conrado A.; Pimenta, Jessica Fernanda N.; Guedes, Raul Narciso C.; Martins, Gustavo Ferreira

doi:10.1007/s13592-014-0272-7

Cited by 12 publications

(6 citation statements)

References 40 publications

(77 reference statements)

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“…Locomotor behavioral abnormalities were also noted as sublethal effects. Newly emerged adults were virtually inactive regardless of the bioinsecticide used, because locomotor activity normally increases with age . However, adults up to 3 d old or older exhibited distinct walking activity after exposure to azadirachtin or spinosad during the larval stage.…”

Section: Discussionmentioning

confidence: 99%

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Biopesticide‐induced behavioral and morphological alterations in the stingless bee Melipona quadrifasciata

Barbosa

Tomé

Bernardes

et al. 2015

Enviro Toxic and Chemistry

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Because of their natural origin, biopesticides are assumed to be less harmful to beneficial insects, including bees, and therefore their use has been widely encouraged for crop protection. There is little evidence, however, to support this ingrained notion of biopesticide safety to pollinators. Because larval exposure is still largely unexplored in ecotoxicology and risk assessment on bees, an investigation was performed on the lethal and sublethal effects of a diet treated with 2 bioinsecticides, azadirachtin and spinosad, on the stingless bee, Melipona quadrifasciata, which is one of the most important pollinators in the Neotropics. Survival of stingless bee larvae was significantly compromised at doses above 210 ng a.i./bee for azadirachtin and 114 ng a.i./bee for spinosad. No sublethal effect was observed on larvae developmental time, but doses of both compounds negatively affected pupal body mass. Azadirachtin produced deformed pupae and adults as a result of its insect growth regulator properties, but spinosad was more harmful and produced greater numbers of deformed individuals. Only spinosad compromised walking activity of the adult workers at doses as low as 2.29 ng a.i./bee, which is 1/5000 of the maximum field recommended rate. In conclusion, the results demonstrated that bioinsecticides can pose significant risks to native pollinators with lethal and sublethal effects; future investigations are needed on the likelihood of such effects under field conditions.

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Section: Discussionmentioning

confidence: 99%

“…Mushroom bodies are brain structures related to the processing and integration of multisensory information, learning, and memory in bees . These structures show volumetric plasticity dependent on the age and experience of adult workers .…”

Section: Discussionmentioning

confidence: 99%

Biopesticide‐induced behavioral and morphological alterations in the stingless bee Melipona quadrifasciata

Barbosa

Tomé

Bernardes

et al. 2015

Enviro Toxic and Chemistry

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“…demands of energy and muscle synchronization and activity required for flight, leading to its more drastic impairment even under low exposure (Candy et al, 1997). However, the impairment of overall group activity in eusocial bees may also have important consequences for the individuals and the colony (Tomé et al, 2014).…”

Section: Fig 4 Respiration Rate Of Individual (±Se) Adult Workers Omentioning

confidence: 99%

Spinosad in the native stingless bee Melipona quadrifasciata: Regrettable non-target toxicity of a bioinsecticide

et al. 2015

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The risks imposed by novel insecticides, mainly bioinsecticides, are largely unknown despite their increased use and their perceived environmental safety, which is based on their natural origin. Furthermore, unlike honeybees, native pollinator species have received little attention. In the present study, the lethal and sublethal effects of the neonicotinoid imidacloprid and the bioinsecticide spinosad were assessed in the stingless bee species Meliponaquadrifasciata, an important native pollinator in the Neotropical region. The adult stingless bee workers exhibited high oral insecticide susceptibility, with LD50s of 23.54 and 12.07 ng a.i./bee for imidacloprid and spinosad, respectively. Imidacloprid also impaired worker respiration and overall group activity and flight, while spinosad significantly impaired only worker flight despite exhibiting higher oral toxicity to adult workers than imidacloprid. These findings indicate the hazardous nature not only of imidacloprid but also the bioinsecticide spinosad to adult workers of the native pollinator M. quadrifasciata. Therefore, bioinsecticides should not be exempted from risk assessment analysis due to their lethal and sublethal components.

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“…At the CNS level, the age-dependent modulation of attraction behavior and AL neuron sensitivity to sex or aggregation pheromones in moths and locusts has been shown to depend, among others, on juvenile hormone titers (for review see Gadenne et al ( 2016 )). In various insects, morphological changes have been observed in primary and secondary olfactory centers associated with age-dependent increases in olfactory sensitivity to specific cues or changes in olfactory learning and memory performance (e.g., Huetteroth and Schachtner 2005 ; Tomé et al 2014 ). These age-dependent changes in olfactory sensitivity, at least in moths, have been shown to be independent of experience.…”

Section: Plasticity and Modulation Related To Age And Environmental Cmentioning

confidence: 99%

Plasticity and modulation of olfactory circuits in insects

Anton

Rößler

2020

Cell Tissue Res

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Olfactory circuits change structurally and physiologically during development and adult life. This allows insects to respond to olfactory cues in an appropriate and adaptive way according to their physiological and behavioral state, and to adapt to their specific abiotic and biotic natural environment. We highlight here findings on olfactory plasticity and modulation in various model and non-model insects with an emphasis on moths and social Hymenoptera. Different categories of plasticity occur in the olfactory systems of insects. One type relates to the reproductive or feeding state, as well as to adult age. Another type of plasticity is context-dependent and includes influences of the immediate sensory and abiotic environment, but also environmental conditions during postembryonic development, periods of adult behavioral maturation, and short- and long-term sensory experience. Finally, plasticity in olfactory circuits is linked to associative learning and memory formation. The vast majority of the available literature summarized here deals with plasticity in primary and secondary olfactory brain centers, but also peripheral modulation is treated. The described molecular, physiological, and structural neuronal changes occur under the influence of neuromodulators such as biogenic amines, neuropeptides, and hormones, but the mechanisms through which they act are only beginning to be analyzed.

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Age-mediated and environmentally mediated brain and behavior plasticity in the stingless bee Melipona quadrifasciata anthidioides

Cited by 12 publications

References 40 publications

Biopesticide‐induced behavioral and morphological alterations in the stingless bee Melipona quadrifasciata

Biopesticide‐induced behavioral and morphological alterations in the stingless bee Melipona quadrifasciata

Spinosad in the native stingless bee Melipona quadrifasciata: Regrettable non-target toxicity of a bioinsecticide

Plasticity and modulation of olfactory circuits in insects

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