| 圆尾鲎与中国鲎消化道形态学与组织学观察 |
| Morphological and histological observations on the digestive tract of Carcinoscorpius rotundicauda and Tachypleus tridentatus |
| 投稿时间：2015-08-13 修订日期：2016-07-18 |
| DOI：10.15928/j.1674-3075.2016.05.014 |
| 中文关键词:圆尾鲎 中国鲎 消化道 形态学 组织学 |
| 英文关键词:Carcinoscorpius rotundicauda Tachypleus tridentatus digestive tract morphology histology |
| 基金项目:广西自治区主席农业院士顾问专项 |
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| 中文摘要: |
| 为了解圆尾鲎和中国鲎消化道的组织学和形态学特征，为其发育生物学研究和健康繁育提供理论依据，通过形态解剖、组织切片和光镜等技术对其消化道进行分析。中国鲎与圆尾鲎均来自于广西合浦县西场镇邻近海域，10龄和14龄均各5只，圆尾鲎的头胸甲宽46.78~52.42mm、中国鲎的头胸甲宽46.09~55.44mm。结果表明：圆尾鲎与中国鲎消化道外部及解剖形态基本相似；它们的消化道可划分为前肠（口道、食道、前胃、幽门）、中肠和后肠（直肠、肛门）；前肠、中肠和后肠都由几丁质层、粘膜层、粘膜下层、肌层及外膜组成，但是中肠不含几丁质层。10龄中国鲎和圆尾鲎的消化道总长以及中肠长度差异显著，消化道其余各部分的长度差异不显著。不同龄同种鲎以及同龄不同种鲎间的所有测量指数差异显著。消化道各部分的结构、组织形态均与其杂食性密切相关。 |
| 英文摘要: |
| Morphological and histological studies are important for exploring and understanding the ingestion, digestion and absorption mechanisms of animals. The way that Chinese scientists segment the digestive tract of horseshoe crabs differs from the segmentation developed by scientists outside of China. In this study, the morphological and histological characteristics of the digestive tracts of Carcinoscorpius rotundicauda and Tachypleus tridentatus from the northern gulf of Guangxi Province were investigated using anatomical methods, paraffin tissue sections and optical microscopy. The differences in the digestive tract structure of C. rotundicauda and T. tridentatus were determined and the segmentation of the digestive tract of the two species was completed based on our results and previous research by other scientists. The study extends research in developmental biology and provides information for breeding healthy horseshoe crabs. 10 and 14-year old C. rotundicauda (carapace width 46.78-52.42mm) and T. tridentatus (carapace width 46.09-55.44mm) were collected from the sea near Guangxi Hepu town, with five individuals in each of the four groups. The digestive tracts removed and weighed and morphological parameters were measured, including lengths of the entire digestive tract, stomodaeum, esophagus, proventriculus, pylorus, midgut and hepatopancreatica, width of the anus and distance from hepatopancreatica to pylorus. The morphological and histological characteristics of the digestive tracts of C. rotundicauda and T. tridentatus were similar. The digestive tract can be divided into foregut (cavum buccale, esophagus, proventriculus, and pylorus), midgut and hindgut (rectum and anus). The foregut, midgut and hindgut are composed of chitin layers, mucosa, submucosa, muscular layer and adventitia, but the midgut does not contain chitin. The total and midgut lengths of the digestive tract were significantly different between the two species, but no significant differences were found in the lengths of other parts of the digestive tract. There were significant differences in all parameters measured between the two age groups of the same species. These results indicate that the morphological and histological structures of the digestive tract are adapted to omnivorous feeding. |
| 陈秀荔,朱威霖,杨春玲,罗帮,李琼珍,彭金霞,彭敏,韦嫔媛,蒋伟明,李咏梅.2016.圆尾鲎与中国鲎消化道形态学与组织学观察[J].水生态学杂志,37(5):92-100. |
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