研究了锯缘青蟹抱卵蟹培育和胚胎发育及孵化温度对刚孵化第 1期状幼体 ( Z1)干重 ( DW)和比能值 ( EC,J/mg)以及对幼体发育和存活的影响 .研究结果表明 :胚胎发育随孵育温度的升高而加快 ,但孵育温度与刚孵化幼体的干重和能量 ( E,J/ind)没有明确的相关性 ;而抱卵蟹培育和胚胎发育期间孵育温度的日温差对刚孵化青蟹幼体的干重和能量有明显的影响 ,并对幼体的存活和进一步发育产生影响。当孵育温度日温差≥ 2℃时 ,胚胎发育不整齐 ,孵化不同步 ,死卵或孵出原状幼体的比例高 ;孵化出的第 1期状幼体一般都无法蜕皮进入第 2期。孵育温度日温差与刚孵化幼体的干重或能量的相关性不确定 ,但当孵育温度日温差≥ 2℃时 ,刚孵化的状幼体的个体干重和能量的乘积 ( DW× E) <0 .74 6的几率显著增加 ,幼体可养活的几率极小 ,( DW× E)可作为判断刚孵化的第 1期状幼体能否正常生长发育的指标
【英文摘要】 Mud crab Scylla serrata farming has been going on for at least three decades in south China, especially in recent decade, but it has not reached even its optimum potential. The major constraint for further expansion of mud crab culture is the limited supply of crab ‘seed'. Mud crab culture still depends on wild-caught crablets, but its quantities are not sufficient to meet demand even at the current size of mud crab culture farming. There is a great need to develop a hatchery technology for the mass produ...福建省重中之重资助项
