| Autor: |
B., Dylan Smith, N., Andres Arce, Rodrigues, Ana Ramos, Bischoff, Philipp H., Burris, Daisy, Ahmed, Farah, Gill, Richard J. |
| Předmět: |
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| Zdroj: |
Julius-Kühn-Archiv; 2023, Issue 474, p42-45, 4p |
| Abstrakt: |
For social bees, an understudied step in evaluating pesticide risk is howcontaminated food entering colonies affects residing offspring developmentand maturation. For instance, neurotoxic insecticide compounds in foodcould affect central nervous system development predisposing individualsto become poorer task performers later-in-life. Studying bumblebee coloniesprovisioned with neonicotinoid spiked nectar substitute, we measured brainvolume and learning behaviour of 3 or 12-day old adults that hadexperienced in-hive exposure during brood and/or early-stage adult devel-opment. Micro-computed tomography scanning and segmentation of multiple brain neuropils showed exposure during either of the developmen-tal stages caused reduced mushroom body calycal growth relative tounexposed workers. Associated with this was a lower probability ofresponding to a sucrose reward and lower learning performance in an olfac-tory conditioning test. While calycal volume of control workers positivelycorrelated with learning score, this relationship was absent for exposedworkers indicating neuropil functional impairment. Comparison of 3- and12-day adults exposed during brood development showed a similardegree of reduced calycal volume and impaired behaviour highlighting last-ing and irrecoverable effects from exposure despite no adult exposure. Ourfindings help explain how the onset of pesticide exposure to whole coloniescan lead to lag-effects on growth and resultant dysfunction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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