摘要：本实验使用扫描电子显微镜来观察与研究克氏原螯虾的触角、第三颚足以及四对步足的端部。通过电镜扫描图片发现克氏原螯虾的小触角内肢与外肢都是由节组成，节间及节上具有绒毛，尖端具有四个绒毛，且汇集成一束。大触角绒毛稀少，发现绒毛一长一短一起出现的现象。第三颚足上毛质丰富，绒毛可长达2.3mm，绒毛单根生长，聚集成片。四对步足的边缘都具有锯齿状突起，绒毛聚集成区，长短不一，介于200-600μm。第二、三步足聚集区绒毛分为两个扇片，第四、五步足聚集区绒毛形成一束。克氏原螯虾的触觉器官上都分布有绒毛结构，推测绒毛与克氏原螯虾的触觉感受器的功能有重要关系，绒毛结构是克氏原螯虾的触觉感受器。54015

毕业论文关键词: 克氏原螯虾； 触觉器官；扫描电子显微镜

Abstract: in this experiment, the scanning electron microscopy is used to observe and study of red swamp crawfish’s antennas, the third maxilliped and four pereopods. By scanning electron microscopy pictures ,we can find sendopodite and exopod of antenule are composed of segments .And there are villi between segments or on segments. Four villi on the top of antennas collect into a bundle.there are a little of villi on antenna,and we find that there are two villi ,one of them is longer,anther is shorter,but they always show up together. There are much villi which could up to 2.3 mm and they grow singly but get together on the third maxilliped.On the edge of the four pereopods have dentations, Villi gathered into one area,they have different length, between 200-600 μ m.The second and third pereopods’s villi is pided into two blades.The fourth and fifth pereopods’s villi form a bundle. Procambarus clarkii’s tactile organs are distributed with villous structure, there is important relationship between villi and procambarus clarkii’s tactile organs. Villous structure is red swamp crawfish’s tactile organ.

Key words: Procambarus clarkia, tactile organ, scanning electron microscope

目录

1  引言 4

1．1 克氏原螯虾的特征 4

1.2 克氏原螯虾基础生物学的研究进展 5

1.2.1克氏原螯虾形态学的研究 5

1.2.2 克氏原螯虾行为学的研究 7

1.3  蝗虫（直翅目）的超显微观察 8

1.4.本项目研究的目的与意义 9

2  材料与方法 9

2.1材料 9

2.2方法 10

3  结果与分析 10

3.1 小触角外肢电镜扫描图与分析 10

3.2 小触角内肢电镜扫描图与分析 11

3.3 大触角电镜扫描图与分析 11

3.4 第三颚足内肢端部电镜扫描图与分析 12

3.5 第二步足电镜扫描图与分析 12

3.6 第三步足电镜扫描图与分析 13

3.7 第四步足电镜扫描图与分析 13

3.8 第五步足电镜扫描图与分析 14

4  讨论 14

4.1 克氏原螯虾触觉感受器 14

4.2 克氏原螯虾触觉感受器与蝗虫的对比