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Small and Large Bumblebees Invest Differently when Learning about Flowers
Current Biology ( IF 9.2 ) Pub Date : 2020-12-28 , DOI: 10.1016/j.cub.2020.11.062
Elisa Frasnelli 1 , Théo Robert 1 , Pizza Ka Yee Chow 1 , Ben Scales 1 , Sam Gibson 1 , Nicola Manning 1 , Andrew O Philippides 2 , Thomas S Collett 3 , Natalie Hempel de Ibarra 1
Affiliation  

Honeybees1 and bumblebees2 perform learning flights when leaving a newly discovered flower. During these flights, bees spend a portion of the time turning back to face the flower when they can memorize views of the flower and its surroundings. In honeybees, learning flights become longer when the reward offered by a flower is increased.3 We show here that bumblebees behave in a similar way, and we add that bumblebees face an artificial flower more when the concentration of the sucrose solution that the flower provides is higher. The surprising finding is that a bee’s size determines what a bumblebee regards as a “low” or “high” concentration and so affects its learning behavior. The larger bees in a sample of foragers only enhance their flower facing when the sucrose concentration is in the upper range of the flowers that are naturally available to bees.4 In contrast, smaller bees invest the same effort in facing flowers whether the concentration is high or low, but their effort is less than that of larger bees. The way in which different-sized bees distribute their effort when learning about flowers parallels the foraging behavior of a colony. Large bumblebees5,6 are able to carry larger loads and explore further from the nest than smaller ones.7 Small ones with a smaller flight range and carrying capacity cannot afford to be as selective and so accept a wider range of flowers.

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中文翻译:

小型和大型大黄蜂在学习花卉时的投资方式不同

蜜蜂1和大黄蜂2在离开新发现的花时进行学习飞行。在这些飞行中,当蜜蜂能够记住花朵及其周围环境的景色时,它们会花一部分时间转身面对花朵。在蜜蜂中,当一朵花提供的奖励增加时,学习飞行时间会变得更长。3我们在这里展示了大黄蜂的行为方式相似,并且我们补充说,当人造花提供的蔗糖溶液的浓度更高时,大黄蜂更容易面对人造花。令人惊讶的发现是,蜜蜂的体型决定了大黄蜂对“低”或“高”注意力的看法,从而影响其学习行为。仅当蔗糖浓度在蜜蜂天然可利用的花的上限范围内时,觅食者样本中较大的蜜蜂才会增强它们的花面。4相比之下,无论浓度高低,较小的蜜蜂在面对花朵时都会付出相同的努力,但它们的努力比较大的蜜蜂要少。不同大小的蜜蜂在学习花朵时分配努力的方式与蜂群的觅食行为相似。大黄蜂5 6能够比较小的大黄蜂携带更大的负载并在离巢更远的地方探索。7飞行范围和承载能力较小的小型植物无法承受如此高的选择性,因此可以接受更广泛的花卉。

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更新日期:2021-03-08
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