The communal crop: modulation of sucrose response thresholds of pre-foraging honey bees with incoming nectar quality
The communal crop: modulation of sucrose response thresholds of pre-foraging honey bees with incoming nectar quality
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DOI：
10.1007/s00265-003-0714-0
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发表时间：
2004-01-01
影响因子：
2.3
通讯作者：
Fondrk, MK
中科院分区：
文献类型：
--
作者：
Pankiw, T;Nelson, M;Fondrk, MK
我们检查了觅食蜜蜂返回的蔗糖溶液的质量（浓度）是否影响蜂群预觅食成员的反应阈值。六对菌落随意接触蔗糖溶液饲养器。每对中的一个菌落从 20-50% 糖浓度饲养槽中更换，而另一个则继续使用 20% 蔗糖浓度饲养槽。与将觅食改为 50% 蔗糖的群体中的预觅食者相比，始终以 20% 蔗糖为食的群体的预觅食者对一系列增加的蔗糖浓度的长鼻伸展反应 (PER) 评分显着更高。尽管所有蜂群都有蜂蜜储备，但与来自以 50% 蔗糖为食的蜂群相比，以 20% 蔗糖为食的蜂群中的非觅食蜜蜂作物中的糖溶液浓度显着较低。由于幼蜂对糖的反应阈值是通过返回蜂群的蔗糖溶液浓度来调节的，因此我们重复了 Pankiw 和 Page 2000 年的研究，该研究可能会混淆基线响应阈值与由于蜂群经验而调节的分数。在这里，我们检查了蜜蜂在出现后 6 小时内、喂食之前的蔗糖 PER 评分，以及 2 至 3 周后的饲料选择。与最终成为花蜜采集者的蜜蜂相比，新出现的花粉采集者的 PER 分数更高。这些结果证实了 Pankiw 和 Page 2000 年的研究结果。综合起来，这些实验表明，觅食前蔗糖反应阈值的变化是在成虫出现之前建立的，但可能会在以后受到传入资源的调节。这种调节是否对觅食行为产生长期影响尚不清楚，但调节具有短期效果，并且有可能成为蜂群中所有蜜蜂之间的交流手段。
We examined whether the quality (concentration) of incoming sucrose solutions returned by foraging honey bees affected the response thresholds of pre-foraging members of the colony. Six pairs of colonies were given ad libitum access to sucrose solution feeders. A colony from each pair was switched from 20-50% sugar concentration feeders while the other continued to have access to 20% sucrose feeders. Proboscis extension response (PER) scores to an increasing series of sucrose concentrations were significantly higher in pre-foragers of colonies foraging on 20% sucrose throughout compared to pre-foragers in colonies where foraging was switched to 50% sucrose. Although all colonies had honey stores, the concentration of sugar solution in non-foraging bees' crops were significantly lower in bees from colonies foraging on 20% sucrose compared to those from colonies foraging on 50% sucrose. Because response thresholds to sugar of young bees were modulated by the concentration of sucrose solution returned to colonies, we repeated the 2000 study of Pankiw and Page that potentially confounded baseline response thresholds with modulated scores due to experience in the colony. Here, we examined PER scores to sucrose in bees within 6 h of emergence, prior to feeding experience, and their forage choice 2 to 3 weeks later. Pollen foragers had higher PER scores as newly emerged bees compared to bees that eventually became nectar foragers. These results confirm those of the 2000 study by Pankiw and Page. Combined, these experiments demonstrate that variation in pre-forager sucrose response thresholds are established prior to emerging as adults but may be modulated by incoming resources later on. Whether this modulation has long-term effects on foraging behavior is unknown but modulation has short-term effects and the potential to act as a means of communication among all bees in the colony.