中国对虾摄食行为的化学感觉生理学研究──Ⅳ.中国对虾化学感受器的发育过程

CHEMOSENSORY PHYSIOLOGICAL STUDIES ON THE FEEDING BEHAVIOR IN THE SHRIMP Penaeus chinensis O'sbeck──THE DEVELOPMENT OF CHEMOSENSORY ORGANS

中国对虾的化学感受器（如第１触角、口器及步足）在其发育（特别是早期发育）过程中，形态发生了显著的变化，其上的化学感觉毛的形态和分布方式均发生了变化。第１触角在ＰＬ７以前只具有羽状刚毛，ＰＬ７时开始出现嗅毛，随后不断 增加，形态与排列方式渐趋成体；口器（第１，２小颚、第１，２ 颚足）内缘组成“漏斗”的刚毛随着发育逐步由羽状刚毛变短、变粗，直至成为细齿状刚毛；步足指节和掌 节形成后，其上逐步出现鳞状刚毛，并随着发育不断增多。中国对虾化学感受器在发育过程中的形态及其上化学感觉刚毛的变化与中国对虾化学感觉机能的变化情况是一致的。

The functional morphology of chemosensory organs (such as antennules, mouthparts and walking legs) and the chemosensory sensillae distributing on them change dramatically during the development (especially early stages) of Penaeus chinensis Osbeck. There are only plumose setae distributing on the antennule before PL7, then the aesthetasc hairs appear, and increase step by step. The seine on the inner margin of the mouthpart (the 1st and 2nd maxillula, 1st and 2nd maxillipeds) change increasingly short, stout, then change to serrulate setae. After the appearance of dactylus and propodites, there appear squamous setae on them, and the number increase thereafter. The development of chemosensory organs in Peneus chinensis Osbeck coincide with the change of chemoreception in the feeding behavior of the prawn.