Analysis of bumblebee visitation sequences within single bouts: implication of the overstrike effect on short-term memory
Analysis of bumblebee visitation sequences within single bouts: implication of the overstrike effect on short-term memory
复制标题
DOI：
10.1007/s00265-004-0889-z
复制
发表时间：
2005-04-01
影响因子：
2.3
通讯作者：
Ishii, HS
中科院分区：
文献类型：
--
作者：
Ishii, HS
传粉者的觅食栖息地包括几种植物类型（物种或变形）可能会继续选择最后访问的植物类型，因为有关类型的信息。最后一次访问的植物的记忆内容支配着所有其他的记忆内容，特别是短期记忆。在这项研究中，我提取了这种过度影响的植物选择的传粉者通过分析模式的访问序列在一个单一的往返之间的蜂巢和觅食补丁（回合）。首先，我用一个模型模拟了单次回合内的访问序列，以显示包括蜜蜂的植物类型偏好、植物的排列和过度打击对短期记忆的影响在内的因素如何影响访问序列。在这里，蜜蜂被假定为饲料的补丁组成的两种植物类型（H和L）。该模型预测，只有短期记忆overstrike的影响会导致各种访问序列，根据植物类型（内回合花恒常性）。也就是说，如果对短期记忆的过度影响是植物选择的主要决定因素，那么蜜蜂在访问L型植物后会飞到L型植物，即使它们主要访问H型植物，反之亦然。接下来，我调查了个体大黄蜂在一片人工花序上的访问序列，其设置类似于模型中假设的设置。两种类型的花序排列在笛卡尔网格上。根据花序类型的各种访问序列进行了观察，这取决于花序之间的距离。这一结果支持了蜜蜂飞到与上次访问相同的植物类型的假设，因为短期记忆被最近访问的植物类型的信息所取代。
Pollinators whose foraging habitats consist of several plant types (species or morph) may continue to choose the plant type last visited because information about the type. of plant last visited dominates over all other memory contents, in particular of short-term memory. In this study, I extracted this overstrike effect on the plant choices of pollinators by analyzing patterns of visitation sequences within a single round-trip between the hive and foraging patch (bout). First, I simulated the visitation sequences within single bouts with a model to show how factors, including the bees' plant-type preferences, the arrangement of plants and the effect of overstrike on short-term memory, affect visitation sequences. Here, bees are assumed to forage in a patch consisting of two plant types (H and L). The model predicts that only the effect of overstrike on short-term memory causes assorted visitation sequences according to plant type (within-bout flower constancy). That is, if the overstrike-effect on short-term memory is the primary determinant of plant choice, then bees will fly to a type-L plant after visiting a type-L plant even if they predominantly visit type-H plants and vice versa. Next, I investigated individual bumblebees' visitation sequences at a patch of artificial inflorescences with a set-up similar to that assumed in the model. Two types of inflorescences were arranged on a Cartesian grid. Assorted visitation sequences according to inflorescence type were observed, depending on the distances among inflorescences. This result supports the hypotheses that bees fly to the same plant type as that last visited because short-term memory is displaced (overstruck) with information about the most recently visited plant type.