文章摘要
背角无齿蚌稚蚌的生长和发育研究
Growth and development in the early juvenile Chinese pond mussel Anodonta woodiana
投稿时间:2020-01-09  修订日期:2020-03-04
DOI:
中文关键词: 背角无齿蚌  稚蚌  形态  器官  生长  指示生物
英文关键词: Anodonta woodiana  juvenile  morphology  organ  growth  bioindicator
基金项目:
作者单位E-mail
郑浩然 南京农业大学无锡渔业学院 1750313712@qq.com 
陈修报 中国水产科学研究院淡水渔业研究中心  
刘洪波 中国水产科学研究院淡水渔业研究中心  
杨健 南京农业大学无锡渔业学院 jiany@ffrc.cn 
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中文摘要:
      背角无齿蚌(Anodonta woodiana)为具有食用、育珠、净水及生物监测等重要经济和生态价值的淡水双壳贝类。为把握其早期生活史过程中形态变化、器官发育及生长速率的特征,本研究对从脱落后第1 d开始到30 d稚蚌期的个体开展了连续性、系统性的研究。结果表明:在稚蚌1~30 d的生长过程中,铰合部的前缘和后缘向上突起,壳顶相对向内收缩,前端生长迅速、向外侧扩展,后端向腹缘方向生长,而腹缘相对向后端生长;第1 d稚蚌出现了斧足,第4 d稚蚌的内脏团较为明显,第10 d稚蚌鳃清晰可见,前、后闭壳肌已经形成,第15 d稚蚌的肠道和心脏清晰可见,第20 d稚蚌形成进水管和出水管,第25 d以后稚蚌的器官已经全部发育完成;壳长、壳高和年龄之间呈指数生长,壳长与壳高之间呈正异速生长。上述结果可为背角无齿蚌的人工繁育、种质资源保护和种群恢复以及有效开发、利用其为水污染监测专用指示生物等工作提供理论指导。
英文摘要:
      Freshwater mussel Anodonta woodiana is a freshwater bivalve with important economic and ecological values, e.g., edible, pearl cultivation, water purification, and aquatic biological monitoring. In order to understand the characteristics of morphological change, organ development and growth rate of A. woodiana during the early life stage, relevant studies were conducted by the 1-day to 30-day juveniles. From 1- to 30-d-old stages, the leading edge and the trailing edge of the hinge for the juveniles were raised upward. The umbo was relatively contracted inward. The anterior grew rapidly and extended outwards, but the posterior grew towards the ventral edge. The ventral edge grew towards the ventral edge. The most obvious feature for 1-day-old juveniles was the appearance of a mobile foot. The visceral mass was more obvious for 4-day-old juveniles. For 10-day-old juveniles, the gills were clearly visible and the anterior and posterior adductors were formed. The intestine and heart were obviously visible for 15-day-old juveniles. The incurrent siphon and excurrent siphon had been formed for 20-day-old juveniles. For the juveniles at 25-day-old, the organs were fully developed. Shell length, shell height, and age grow exponentially, and shell length and shell height grow at positive allometry. The aforementioned results can provide theoretical guidance for the artificial breeding of A. woodiana, its germplasm resource protection and population restoration, and the effective development and utilization of this bivalve as a special indicator for aquatic pollution biomonitoring.
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