瓣结鱼的胚胎及幼鱼发育
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怀化师范高等专科学校生物系

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三峡工程环境保护科研项目


The embryonic and larval development of Tor brevifilis brevifilis
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Department of Biology, Huaihua Teachers’ College, Huaihua 418008, China

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    摘要:

    首次记述了瓣结鱼的早期发育过程,对其胚胎及幼鱼发育各期特征先后进行了3次较为仔细的观察,并记述了胚胎发育的积温、累积度时值以及从孵化到105d的幼鱼的生长数据.成熟卵直径1 7~1.9mm,受精卵吸水膨胀后,外膜径达2.5~2.7mm,具粘性.在水温20.5~23.0℃条件下,受精卵历时71h 7min孵化,初孵仔鱼平均全长6.6mm,经65~72d,幼鱼发育基本完成.对瓣结鱼胚胎发育的下限温度及早期发育作了探讨

    Abstract:

    The present paper deals with the early development of Tor brevifilis brevifilis. The development characters of embryos and larvae in every stage have been carefully observed for three times. The experiment obtained the sum of heat and the product of effective temperature by time in all stages of embryonic development. The growth digits in 105 days during larval development were measured. The fertilized eggs are sticky , their diameters are 1. 7~1.9mm and 2.5~2. 7mm after being expanded in water. While the water temperature is 20. 5~23. 0 ℃,thewholeprocessofembryonicdevelopmentlastedfor 71 hoursand 7minutes. Themeanlength of newly hatched larva is 6. 6mm. After 65 to 72 days , the development of larvae has nearly completed. The desired lowest temperature during embryonic development and several obvious characters in its total early development have been discussed.

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谢恩义.瓣结鱼的胚胎及幼鱼发育[J].水产学报,2002,26(2):

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历史
  • 收稿日期:2014-04-10
  • 最后修改日期:2014-04-10
  • 录用日期:2014-04-11
  • 在线发布日期: 2014-04-11
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