A syntax of hoverfly flight prototypes
A syntax of hoverfly flight prototypes
复制标题
DOI：
10.1242/jeb.036079
复制
发表时间：
2010-07-15
影响因子：
2.8
通讯作者：
Egelhaaf, Martin
中科院分区：
文献类型：
--
作者：
Geurten, Bart R. H.;Kern, Roland;Egelhaaf, Martin
食蚜蝇（例如 Eristalis tenax Linnaeus）以其独特的飞行方式而闻名。它们可以在同一地点盘旋几秒钟，然后突然向任何可能的方向移动。为了确定复杂飞行动作的定量和结构化描述，我们搜索了一组重复发生的原型运动（PM）及其排序规则。通过将聚类算法应用于自由飞行序列期间 Eristalis 身体的平移和旋转速度来识别 PM。这种方法产生了九个稳定可靠的 PM，从而大大降低了行为描述的复杂性。这组 PM 以及它们之间的转换概率构成了飞行行为的语法描述。 PM 本身可以大致分为快速旋转（扫视）和各种不同的平移运动（扫视间间隔）。我们将这种分离解释为反映了主动传感策略，该策略有助于从视网膜图像位移中提取空间信息。对眼跳的详细分析表明，它们是单独围绕所有旋转轴以及以所有可能的组合进行的。我们发现给定扫视类型发生的概率取决于参数，例如身体长轴与飞行方向之间的角度。
Hoverflies such as Eristalis tenax Linnaeus are known for their distinctive flight style. They can hover on the same spot for several seconds and then burst into movement in apparently any possible direction. In order to determine a quantitative and structured description of complex flight manoeuvres, we searched for a set of repeatedly occurring prototypical movements (PMs) and a set of rules for their ordering. PMs were identified by applying clustering algorithms to the translational and rotational velocities of the body of Eristalis during free-flight sequences. This approach led to nine stable and reliable PMs, and thus provided a tremendous reduction in the complexity of behavioural description. This set of PMs together with the probabilities of transition between them constitute a syntactical description of flight behaviour. The PMs themselves can be roughly segregated into fast rotational turns (saccades) and a variety of distinct translational movements (intersaccadic intervals). We interpret this segregation as reflecting an active sensing strategy which facilitates the extraction of spatial information from retinal image displacements. Detailed analysis of saccades shows that they are performed around all rotational axes individually and in all possible combinations. We found the probability of occurrence of a given saccade type to depend on parameters such as the angle between the long body axis and the direction of flight.