不同发育期锯缘青蟹(Scylla serrata)幼体摄食的变化 | VARIATIONS IN FEEDING OF SCYLIA SERRATA LARVAE IN DIFFERENT DEVELOPMENTAL STAGES
2006
朱小明 | 姜晓东 | 李少菁
【中文摘要】 每天从锯缘青蟹育苗池采集幼体,在实验室内依平衡法测定从孵化至大眼幼体各天青蟹幼体的摄食率,并同时测定青蟹幼体每天的干重和比能值,比较研究了饵料密度对青蟹不同发育阶段幼体摄食的影响,以及幼体蜕皮周期内摄食的变化。结果表明,轮虫是青蟹蚤状幼体(Z)Ⅰ期(Z1)和Ⅱ期(Z2)适宜的饵料,卤虫无节幼虫是青蟹幼体生长发育主要的能量来源,占整个幼体发育期摄入能量的96·48%。以干重和能量表示的青蟹幼体摄食率(CDW和CJ)随幼体蜕皮发育呈指数增长[CDW=13·463e0·8283(d+1)(r2=0·927),p<0·01;CJ=0·4018e0·7516(d+1)(r2=0·956),p<0·01];青蟹大眼幼体摄食强度显著上升,摄入能量高达整个幼体发育期摄入能量的77·25%。Z1、Z2期为被动摄食,青蟹幼体主动摄食的能力随幼体发育而逐渐提高,大眼幼体为主动摄食。锯缘青蟹各期幼体蜕皮周期内摄食率的变化是:Z1→Z4期蜕皮后上升,蜕皮前稍微下降;Z5期蜕皮后和蜕皮前较高,蜕皮间较低。Z5期日粮水平最低;青蟹大眼幼体期有2个摄食峰值,变化不规则。 【英文摘要】 In laboratory condition, the authors investigated the effects of prey density on consumption rate and daily ration, and the feeding variations in molting cycle of mud crab (Scylla serrata) larvae that reared in breeding ponds from hatching through megalope metamorphosis.Mud crab larvae were isolated from the culturing tank everyday during larval development. The individual dry weight and energy content of larval mud crab were determined everyday.The feeding trials were conducted 4—12h under the conditions s...
Show more [+] Less [-]福建省重中之重项目“海洋生物优良种质和生物活性物质的应用基础研究”资助,1998—2002; 国家海洋863项目“锯缘青蟹大规模人工育苗技术”资助,2002AA603013号
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