Cost-benefit analysis potential in feeding behavior of a predatory snail by integration of hunger, taste, and pain
Cost-benefit analysis potential in feeding behavior of a predatory snail by integration of hunger, taste, and pain
复制标题
DOI：
10.1073/pnas.97.7.3585
复制
发表时间：
2000-03-28
影响因子：
11.1
通讯作者：
Moroz, LL
中科院分区：
文献类型：
--
作者：
Gillette, R;Huang, RC;Moroz, LL
饥饿/满足状态与食欲和有害刺激相互作用，以确定喂养和回避反应。在加利福尼亚的掠食性海洋蜗牛胸骨链球菌中，食物chemostimuli诱导长鼻延伸，并在直接随着饱满状态变化的浓度阈值处咬合。但是，食物刺激还倾向于在相对较低和固定的浓度阈值下引起回避行为（戒断和回避转弯）。当超过主动喂养的喂养阈值（超出咬伤的长鼻伸展）时，会中断和抑制运动。有害的chemostimuli通常会刺激回避，但是，在食物刺激的喂养阈值较低的动物中，它们通常会引起喂养行为。因此，介导食欲和有害刺激的感觉途径可能双重访问喂养和回避行为的神经网络，但它们的最终影响受饱满状态的调节。这些观察结果表明，一个简单的成本效益计算调节动物的觅食行为中的行为转换，在动物的觅食行为中，食物刺激以上或低于激励水平的喂养水平倾向于诱发喂养或避免。这种决策机制可以使动物对营养的需求与其他捕食者的潜在风险以及对猎物攻击的相对能量支出的可能性。在最饥饿的动物中刺激拖曳式有害刺激的定向和攻击可能反映出可以增强猎物捕获成功的冒险。一个简单的享乐结构化神经网络模型捕获了此计算。
Hunger/satiation state interacts with appetitive and noxious stimuli to determine feeding and avoidance responses. In the predatory marine snail Pleurobranchaea californica, food chemostimuli induced proboscis extension and biting at concentration thresholds that varied directly with satiation state. However, food stimuli also tended to elicit avoidance behavior (withdrawal and avoidance turns) at concentration thresholds that were relatively low and fixed. When the feeding threshold for active feeding (proboscis extension with biting) was exceeded, ongoing avoidance and locomotion were interrupted and suppressed. Noxious chemostimuli usually stimulated avoidance, but, in animals with lower feeding thresholds for food stimuli, they often elicited feeding behavior. Thus, sensory pathways mediating appetitive and noxious stimuli may have dual access to neural networks of feeding and avoidance behavior, but their final effects are regulated by satiation state. These observations suggest that a simple cost-benefit computation regulates behavioral switching in the animal's foraging behavior, where food stimuli above or below the incentive level for feeding tend to induce feeding or avoidance, respectively. This decision mechanism can weigh the animal's need for nutrients against the potential risk from other predators and the cost of relative energy outlay in an attack on prey. Stimulation of orienting and attack by tow-revel noxious stimuli in the hungriest animals may reflect risk-taking that can enhance prey capture success. A simple, hedonically structured neural network model captures this computation.