文章摘要
郑斯涌,马志章,江希明.白鲢卵巢发育过程中的磷化合物含量变化的研究[J].水产学报,1965,2(1):21~32
白鲢卵巢发育过程中的磷化合物含量变化的研究
QUANTITATIVE CHANGES OF THE OVARIAN PHOSPHORUS COMPOUNDS OF HYPOPHTHALMICHTHYS MOLITRIX DURING OVARIAN DEVELOPMENT
  
DOI:
中文关键词: 大连紫海胆  人工育苗  幼虫
英文关键词: 
基金项目:
作者单位
郑斯涌 杭州大学生物系 
马志章 杭州大学生物系 
江希明 杭州大学生物系 
摘要点击次数: 1442
全文下载次数: 1050
中文摘要:
      在家鱼人工繁殖过程中,性腺的发育成熟是保证生产的先决条件。因此,如何促进亲鱼的性腺发育是生产上的关键问题之一,这在我国北方较冷地区尤为重要。近年来在生产实践中已创造出一些优良的养殖经验,但是由于鱼卵的构造比较复杂,卵巢发育中的代谢过程也极为繁复,因而,对于这些实际经验还不易从理论上加以阐述,这就影响了生产技术的继续提高和发展。为了解决这个问题,必须对鱼体性腺的发育过程及其变化机制进行研究,才能对亲鱼培育的技术措施,提供理论上的依据和改进的建议。
英文摘要:
      The phosphorus compounds in the ovaries of various developmental stages fromthe adult Chinese farm fishes, Hypophthalmichthys molitrix, were analysed accordingto the methods of Schneider 1945 and Schmidt and Thannhauser 1945. At the sametime, the contents of water, protein and fat of the ovaries were also estimated withthe usual biochemical methods. In the ovaries of young developmental stages Ⅱ and Ⅲ, the acid solublephosphorus compound (A) and ribonucleic acid (RNA) are significantly higher thanthe other phosphorus compounds-the phospholipid (L), phosphoprotein (Pp) and deoxyribonucleic acid (DNA). The phosphorus content of the former two compoundsconstitutes more than 85% of the total phosphorus in the young oyaries. As thedevelopment advanced, the phosphorus contents of L and Pp increase promptly duringstage IVa to IVc, while those of the A and RNA decrease during the same stages.The increasing features of the total protein and fat are essentially the same as thoseof L and Pp. Although the contents of these phosphorus compounds manifest differently in aunit weight of various stages of ovaries, the total amount of all these constituentsin one ovary increase in considerable extent during the development here considered.The most prominent feature is the increasing scale of the amounts of L and Pp, whichincrease 980- and 1,333-times respectively within the course of ovarian developmentstudied. These changes seem to bear relation to the formation of yolk in the oocytesand the histological development of the ovary. As the variation in the contents of these phosphorus compounds is considered, itis obvious that the major increase of L and Pp occurs mainly in the stage IV of deve-lopment, which lasts from February to April for Hypophthalmichthys molitrix in ourdistrict. This means that such a vast increment of the ovarian materials may besynthesized in a short period of 2 to 3 months. Therefore, it is obvious that, inpractice, a sufficient food supply in the spring is indispensable for the ovariandevelopment of the brood fishes to be used in the artificial propagation. This mayoffer from the theoretical aspect a technical guidance for the acceleration of thesexual maturity of the brood fishes in the pisciculture. The changes in terms of the percentages of the different phosphorus compounds indifferent stages lead to the conclusion that the developmental process of the fishovary may consist of two phases of synthesis: (1) the early phase, ranging fromstage Ⅱ to stage Ⅳa, is characterized by the synthesis of protoplasm shown as an abun-dance of A and RNA; (2) the late phase including the stage Ⅳ as a whole, ismarked by the synthesis of yolk indicated by an immence increase of L and Pp. The biological significance of the formation of these phosphorus compounds inthe ovarian development of the fishes studied is to incorporate the energy-rich phos-phates into organic constituents in the oocyte as well as to synthesise a large amountof organic substances as reserve materials both for the embryonic development of theeggs after fertilization.
HTML   查看全文   下载PDF阅读器
关闭

手机扫一扫看