Stull A K, Gruberg E R
Biology Department, Temple University, Philadelphia, PA 19122, USA.
Brain Behav Evol. 1998;52(1):37-45. doi: 10.1159/000006550.
When given the option between a ground-level prey presented in front and another prey presented 90 degrees to the side, leopard frogs have a front preference. When given a choice between prey objects presented at the left and right sides, some individual leopard frogs have a side preference. Repeated prey object presentations at one side predispose leopard frogs to respond to the opposite side when presented with prey objects at both sides. The phenomenon is preserved through a half minute delay between single prey presentations (biasing) and two prey presentations (testing) but not through a three-minute delay between biasing and testing. Ten biasing presentations on a side are sufficient to induce opposite side preference, while three biasing presentations are insufficient. Attempts to permanently modify preferences by completely exhausting responsiveness to a single side were unsuccessful. A neural model for the effect of biasing on behavior is shown.
当在面前呈现的地面猎物和在侧面90度呈现的另一个猎物之间进行选择时，豹蛙表现出对前方的偏好。当在左侧和右侧呈现的猎物对象之间进行选择时，一些个体豹蛙表现出对一侧的偏好。在一侧重复呈现猎物对象会使豹蛙在两侧都呈现猎物对象时倾向于对另一侧做出反应。这种现象在单次猎物呈现（偏向）和两次猎物呈现（测试）之间延迟半分钟时得以保留，但在偏向和测试之间延迟三分钟时则不然。在一侧进行十次偏向呈现足以诱导对另一侧的偏好，而三次偏向呈现则不足。试图通过完全耗尽对一侧的反应能力来永久改变偏好的尝试未成功。展示了一个关于偏向对行为影响的神经模型。
