泥东风螺(Babylonia lutosa)规模化人工育苗技术和早期发育观察

    Research on the scale artificial breeding technique and the morphological observation of the early developmental stages of Babylonia lutosa

    • 摘要: 2012年06月—2014年09月期间,收集野生泥东风螺(Babylonia lutosa)5 775粒,经培育成活5 246粒,存活率90.8%。亲螺的繁殖期为6—9月,水温在26℃30℃时为产卵高峰;卵囊呈梯形、马鞍状、透明,单个卵囊卵粒数量309~472粒,平均381粒。在日常饵料中补充金藻、角毛藻等高不饱和脂肪酸(High unsaturated fatty acid,HUFA)含量较高的单胞藻,可提高存活率。3年来浮游幼体的变态率逐年提高,并培育出壳高3.08~15.91 mm的泥东风螺苗1 733.85×104粒,同时对泥东风螺从受精卵到变态为稚螺的整个发育过程进行显微观察,共分16期。

       

      Abstract: During 2012 - 2 014, the research on the artificial breeding technique of Babylonia lutosa was conducted by collecting a number of 5 775 wild broodstock of Babylonia lutosa. After breeding,5 246 of Babylonia lutosa were survived, and the survival rate was 90.8% . The breeding season of broodstock was from June to September, and the peak period appeared when the water temperature was between 26℃ ?30℃ . Oocyst was trapezoid or saddle shaped and transparent. There were 309 ?472 eggs in one Oocyst, 381 by average. Adding Isochrysis zhanjiangensis, Chaetoceros muelleri and algae with high concentration of H U F A into diary as supplementary could improve the survival rate. More, the metamorphosis rate raised progressively in 3 years’test. Finally, 17.3 385 million of juveniles with the shell height of 3.08 mm to 15.91 mm were successfully bred. Meanwhile, the metamorphosis of the whole early developmental stages of Babylonia lutosa,which was divided into 16 stages, was observed under microscope.

       

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