Prior to experiments, bees have been fed pollen and you can artificial nectar advertising libitum rather than coverage so you’re able to coloured stimulus of the dining

(a) Understanding performance

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I obtained a dozen bumble-bee (Bombus terrestris dalmatinus) colonies, for each and every which has had 30forty pros, away from Koppert Physiological Solutions (Berkel durante Rodenrijs, Holland). Most of the gurus had been exclusively designated with the thorax with numbered, coloured labels (Opalith labels; Religious Graze Kg, Germany).