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Bumble bee brain

Ken Sasaki, Hinako Matsuyama, Naruaki Morita, Masato Ono
A society of bumble bees is primitively eusocial, with an annual life cycle, and can be used as a physiological model of social bees for comparative studies with highly eusocial hymenopterans. We investigated the dynamics of biogenic amine levels in the brain, meso-metathoracic ganglia, terminal abdominal ganglion, and hemolymph in queens 1 day after mating (1DAM), during diapause (Dp), and during colony founding (CF) in the bumble bee, Bombus ignitus. Dopamine levels in the brain of CF queens were significantly lower than in 1DAM and Dp queens, and the levels in the thoracic ganglia and hemolymph in CF queens were lower than in 1DAM queens, but did not differ from other groups in the abdominal ganglion...
November 2017: Journal of Insect Physiology
Gabrielle A Lockett, Edward J Almond, Timothy J Huggins, Joel D Parker, Andrew F G Bourke
Eusocial insects provide special insights into the genetic pathways influencing aging because of their long-lived queens and flexible aging schedules. Using qRT-PCR in the primitively eusocial bumble bee Bombus terrestris (Linnaeus), we investigated expression levels of four candidate genes associated with taxonomically widespread age-related pathways (coenzyme Q biosynthesis protein 7, COQ7; DNA methyltransferase 3, Dnmt3; foraging, for; and vitellogenin, vg). In Experiment 1, we tested how expression changes with queen relative age and productivity...
May 2016: Experimental Gerontology
S Hollis Woodard, Guy Bloch, Mark R Band, Gene E Robinson
During the nest-founding phase of the bumble bee colony cycle, queens undergo striking changes in maternal care behavior. Early in the founding phase, prior to the emergence of workers in the nest, queens are reproductive and also provision and feed their offspring. However, later in the founding phase, queens reduce their feeding of larvae and become specialized on reproduction. This transition is synchronized with the emergence of workers in the colony, who assume the task of feeding their siblings. Using a social manipulation experiment with the bumble bee Bombus terrestris, we tested the hypothesis that workers regulate the transition from feeding brood to specialization on reproduction in nest-founding bumble bee queens...
September 15, 2013: Journal of Experimental Biology
F Wolschin, H Shpigler, G V Amdam, G Bloch
Female bumble bee workers of the same species often show a profound body size variation that is linked to a division of labour. Large individuals are more likely to forage whereas small individuals are more likely to perform in-nest activities. A higher sensory sensitivity, stronger circadian rhythms as well as better learning and memory performances appear to better equip large individuals for outdoor activities compared to their smaller siblings. The molecular mechanisms underlying worker functional polymorphism remain unclear...
June 2012: Insect Molecular Biology
Gianfranco Anfora, Elisa Rigosi, Elisa Frasnelli, Vincenza Ruga, Federica Trona, Giorgio Vallortigara
Brain and behavioural lateralization at the population level has been recently hypothesized to have evolved under social selective pressures as a strategy to optimize coordination among asymmetrical individuals. Evidence for this hypothesis have been collected in Hymenoptera: eusocial honey bees showed olfactory lateralization at the population level, whereas solitary mason bees only showed individual-level olfactory lateralization. Here we investigated lateralization of odour detection and learning in the bumble bee, Bombus terrestris L...
2011: PloS One
Hagai Shpigler, Harland M Patch, Mira Cohen, Yongliang Fan, Christina M Grozinger, Guy Bloch
BACKGROUND: Regulation of worker behavior by dominant queens or workers is a hallmark of insect societies, but the underlying molecular mechanisms and their evolutionary conservation are not well understood. Honey bee and bumble bee colonies consist of a single reproductive queen and facultatively sterile workers. The queens' influences on the workers are mediated largely via inhibition of juvenile hormone titers, which affect division of labor in honey bees and worker reproduction in bumble bees...
2010: BMC Evolutionary Biology
Virginie Cuvillier-Hot, Alain Lenoir
Social harmony often relies on ritualized dominance interactions between society members, particularly in queenless ant societies, where colony members do not have developmentally predetermined castes but have to fight for their status in the reproductive and work hierarchy. In this behavioural plasticity, their social organisation resembles more that of vertebrates than that of the "classic" social insects. The present study investigates the neurochemistry of the queenless ant species, Streblognathus peetersi, to better understand the neural basis of the high behavioural plasticity observed in queenless ants...
March 2006: Die Naturwissenschaften
G Bloch, T Simon, G E Robinson, A Hefetz
To begin to explore the role of biogenic amines in reproductive division of labor in social insects, brain levels of dopamine, serotonin, and octopamine were measured in bumble bee (Bombus terrestris) workers and queens that differ in behavioral and reproductive state. Levels of all three amines were similar for mated and virgin queens. Young workers that developed with or without a queen had similar amine levels, but in queenright colonies differences in biogenic amine levels were associated with differences in behavior and reproductive physiology...
March 2000: Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
G W Kreutzberg, I Klatzo, P Kleihues
Oskar Vogt (1870-1955) was a prominent German neurologist and neuroanatomist with a strong interest in the pathogenesis of brain diseases. Together with his wife Cécile (1875-1962), he published landmark papers on the cyto- and myelo-architecture of the brain and the functional anatomy of the basal ganglia. He developed the concept of pathoclisis, i.e., the selective vulnerability of specific neuronal populations in the CNS. In the 1920's, Vogt created a multi-disciplinary brain research institute, the Kaiser-Wilhelm-Institut für Hirnforschung in Berlin-Buch...
October 1992: Brain Pathology
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