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Associative visual learning, color discrimination, and chromatic adaptation in the harnessed honeybee Apis mellifera L.
Five properties of visual learning under antennae deprivation significantly increased visual acquisition, suggesting that sensory input from the antennae interferes with visual learning, and covering the compound eyes with silver paste significantly decreased visual acquisition. Expand
Unusual thermal defence by a honeybee against mass attack by hornets
THE giant hornet Vespa mandarinia japonica (Hymenoptera: Vespidae) is the only hornet species known to have evolved en masse predation of other social bees and wasps. Here we show that hornets isExpand
Change in the expression of hypopharyngeal-gland proteins of the worker honeybees (Apis mellifera L.) with age and/or role.
The hypopharyngeal gland seems to have two distinct states differentiated by synthesizing of different major proteins depending on the age-dependent role change. Expand
Regulation of reproductive behaviour and egg maturation in the tobacco hawk moth, Manduca sexta
The switch from virgin ‘calling’ behaviour to mated ovipositional behaviour is mediated by the presence of sperm and/or associated testicular fluids in the bursa copulatrix, which is probably the trigger for this response. Expand
Functional Flexibility of the Honey Bee Hypopharyngeal Gland in a Dequeened Colony
Results indicate that the function of the hypopharyngeal gland cells of the worker has flexibility and can, if necessary, be maintained as that of the nurse bee, depending on the condition of the colony. Expand
Heat production by balling in the Japanese honeybee,Apis cerana japonica as a defensive behavior against the hornet,Vespa simillima xanthoptera (Hymenoptera: Vespidae)
As an effective counterattack strategy against predacious hornets, workers of Apis cerana japonica showed a distinct balling reaction, usually involving 180–300 bees, which produced heat for as long as 20 min, giving rise to temperatures higher than 46°C, which is lethal to the hornet but not to the bees. Expand
Importance of social stimuli for the development of learning capability in honeybees
In a series of experiments subjecting the bees to the confined condition for various lengths and timings, the important period for acquiring the learning ability was from day 2 to 6 after emergence, meaning that the continuous input of appropriate sensory stimuli is essential for both acquiring and maintaining the learning capability. Expand
Insect signalling: Components of giant hornet alarm pheromone
A volatile, multi-component alarm pheromone in the venom of the world's largest hornet, V. mandarinia, is identified and field bioassays show that 2-pentanol is its principal active component, and that 3-methyl-1-butanol and 1-methylbutyl 3- methylbutanoate act synergistically with it. Expand
Reduced expression of major royal jelly protein 1 gene in the mushroom bodies of worker honeybees with reduced learning ability
A differential display experiment comparing worker bees maintained in a hive with those reared in isolation showed that the expression of the major royal jelly protein (mrjp) 1 gene was reduced in the isolated worker bees, suggesting that mrjp1 is also important in brain function, possibly involved in the development of learning ability. Expand