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海洋科学  2008 

条斑星鲽消化系统个体发生的组织学观察

, PP. 13-16

Keywords: 条斑星鲽(Verasper,moseri),消化道,幽门盲囊

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Abstract:

应用石蜡切片技术和显微测量法,对从孵化后到变态完成(55~60d,dayposthatching,dph)的条斑星鲽(VeraspermoseriJordanetGilbert)仔稚幼鱼早期发育中消化道的结构变化进行了观察,描述了个体发育过程中的组织学结构特征。结果表明,在13~15℃,7dph的仔鱼开口时,消化道已经分化为口咽腔、食道、肠和直肠,消化器官肝脏和胰腺出现。从7dph到14~17dph(卵黄囊消失)为混合营养期,形态上肠道进一步弯曲、盘旋;功能上中肠空泡样结构和后肠嗜伊红颗粒的出现,预示着肠上皮细胞在胃功能成熟前有吸收蛋白的作用。形态学上胃以及幽门盲囊的分化出现在26~29dph,与稚鱼刚开始附底的时期相吻合。而功能性胃的分化则出现在35dph左右,与稚鱼变态期相一致。条斑星鲽作为中国新近养殖品种,关于其早期发育的报道还是空白,作者对其消化系统进行系统的研究,旨在为该鱼种的商业化养殖提供相关的科学数据,同时也为海水鱼类早期营养和发育生物学的深入研究提供理论依据。

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