...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Annual Research & Review in Biology >Histological Changes in Cuticle of the Red Swamp Crayfish, Procambarus clarkii During Molting Cycle
【24h】

Histological Changes in Cuticle of the Red Swamp Crayfish, Procambarus clarkii During Molting Cycle

机译：蜕皮周期中红色沼泽小龙虾克氏原螯虾表皮的组织学变化

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present study was carried out to investigate histological changes in cuticle structure of the red swamp crayfish, Procambarus clarkii and number of layers of carapace cuticle during different molting stages. The crayfish samples were collected alive from the River Nile tributaries at Al-Kanater Al- Khairiya, Qalyoubiya Governorate during the period from spring 2010 to autumn 2011. These specimens were transported to the laboratory in the Faculty of Science, Al-Azhar University, Nasr City, Cairo. From the collected samples 10 individuals were selected according to molting stages morphologically, they were sexually mature and varied from 6.0 to 10.5 cm in standard length, 6.5 to 11.5 cm in total length and from 9.1 to 48.25 g in total body weight. These specimens were classified into five molting stages to study cuticle structure histologically. During intermolt stage, carapace integument is composed of four distinctive layers. These layers arranged from the outer surface to inner side as: epicuticle, exocuticle, endocuticle and membranous layer, respectively. During this stage, the epidermal layer composes of cuboidal epithelium. At the onset of premolt, a new endocuticle was arose above the membranous layer represents the new carapace. It was characterized externally by a clear separation called an apolysis occurred between an old endocuticle and new one. During an ecdysis, both of pre-ecdysal cuticle and postecdysal one were distinct, pre-ecdysal cuticle comprises epi-, exo-, and endocuticle; while the postecdysal composed of epi- and endocuticle only (without exocuticle), in addition to membranous layer, the epidermis was composed of elongated columnar epithelial cells. All these results indicated that the cuticle structure changes obviously during the course of molting cycle in fresh water crayfish P. clarkii.
机译：本研究旨在研究红sw小龙虾，克氏原螯虾的角质层结构以及不同蜕皮阶段甲壳表皮层数的组织学变化。从2010年春季到2011年秋季，小龙虾样品是从Qalyoubiya省Al-Kanater Al-Khairiya省的尼罗河支流中采集的。这些样品被运至Nasr Al-Azhar大学理学院的实验室。开罗市。从收集的样品中根据形态上的蜕皮阶段选择10个个体，它们具有性成熟性，标准长度在6.0至10.5cm之间，总长度在6.5至11.5cm之间，总体重在9.1至48.25g之间变化。这些标本分为五个蜕皮阶段，以组织学研究角质层结构。在蜕皮阶段，甲壳被膜由四个不同的层组成。这些层从外表面到内侧分别为：表皮层，表皮层，内表皮层和膜层。在此阶段，表皮层由立方形上皮组成。在前蜕皮开始时，在代表新甲壳的膜层上方出现了一个新的内皮。它的外部特征是在旧表皮和新表皮之间发生了明显的分离，称为解离。在蜕皮过程中，蜕皮前角质层和蜕皮后角质都是截然不同的，蜕皮前角质层包括表皮层，外层层和内皮层。蜕皮后仅由表皮和表皮组成（无表皮），除膜层外，表皮还由细长的柱状上皮细胞组成。所有这些结果表明，淡水小龙虾P. clarkii蜕皮过程中表皮结构发生了明显变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号