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通过观察条纹锯鱼旨的胚胎发育过程及卵黄囊仔鱼形态变化,研究其胚胎发育及卵黄囊仔鱼的形态特征、特点。采用Nikon E200显微镜对其胚胎发育形态及卵黄囊仔鱼形态变化进行连续拍照取样,详细描述了其从受精卵到初孵仔鱼的26个具体发育时期的形态特征、孵化温度、发育时间及卵黄囊仔鱼的形态变化特征。结果显示,条纹锯鱼旨的受精卵为球形、游离的浮性卵,平均卵径为0.950±0.039mm;条纹锯鱼旨受精卵孵化需经过卵裂期、囊胚期、原肠胚期、神经胚期、器官生成期和孵化期6个主要时期,在80目的孵化网箱中,水温20～20.5℃、盐度28～32、DO≥5mg/L、pH7.6～8.4静水微充气的条件下需要46h53min孵化;卵黄囊在仔鱼出膜2d后被吸收。
By observing the embryonic development process of striped sawfish and the morphological changes of yolk sac larvae, the embryonic development and the morphological characteristics and characteristics of yolk sac larvae were studied. The morphology of the embryo developmental morphology and the morphological changes of yolk sac larvae were photographed by Nikon E200 microscope. The morphological characteristics, incubation temperature, developmental time and yolk sac larvae were described in detail from the fertilized eggs to newly hatched larvae at 26 specific developmental stages Morphological changes. The results showed that the striped sawfish purpose fertilized eggs as spherical, free floating eggs, the average egg diameter of 0.950 ± 0.039mm; striped sawfish target fertilized eggs hatch through the cleavage stage, blastocyst stage, gastrulation stage, In the 80 main hatching cages, the water temperature was 20 ~ 20.5 ℃, the salinity was 28 ~ 32, DO≥5mg / L, pH7.6 ~ 8.4, hydrostatic and micro-aerated Under the conditions need 46h53min incubation; yolk sac in the larvae after 2d film was absorbed.