The Preliminary Study on Artificial Propagation and Fry Rearing of Misgurnus anguillicaudatus  

泥鳅的人工繁殖与苗种培育初步研究(英文)

作　　者：朱光来[1] 赵子明[1] 

机构地区：[1]江苏农牧科技职业学院,江苏泰州225300

出　　处：《Agricultural Science & Technology》2013年第8期1178-1182,1200,共6页农业科学与技术（英文版）

基　　金：江苏省水产三项工程"湖泊,水库,河流小型彩色鱼类资源开发与利用"(PJ2011-56)~~

摘　　要：[Objective] The aim was to seek the optimal choice of hormones,induced temperature,and initial feed for cultivating loach.[Method] Different hormones were injected to Ioaches for artificial reproduction in water at different temperatures.During cultivation,varied initial feeds were put in to explore the optimal choice of hormones,temperature and initial feed.[Result] According to the test,fecundity of female loach is directly proportional to gonad maturity,namely,the higher gonad maturity,the more fecundity.For example,for a female loach whose maturity coefficient was 24％,absolute and relative fecundity rates were 62 142 and 990.In contrast,for a female whose maturity coefficient was 9％,the rates were 18 207 and 367,respectively.The induced effect differs upon hormones and the test demonstrated that LRH-A2 is better in improving fertility rate compared with HCG.For example,the fertility rate in the group with HCG was 78.84 and in the group with LRH-A2 was 83.04％.It is notable that the mixture of the two at a certain ratio would enhance induced effect and the fertility rate can be as high as 89.17％.With temperature in a certain range,the higher temperature,the better induced effect.The test indicated that water temperature at （30±0.5） ℃ is an optimal one and the effect horizon is 6-8 h.In group 4,induced rate was 93.33％ and the fertility rate was 89.26％.The research indicated that the survival rate was the highest if wheel animalcule,dominated by Brachionus calyciflorus and Brachionus angularis,was taken as an initial feed,followed by artemia nauplii and corpuscule.In addition,loach fry in the group with yolk and wheel animalcule grew about 1.21 times than the group with only yolk,1.04 times than the group with only fairy shrimp,and 1.1 times than the group with fairy shrimp.[Conclusion] The research provides scientific references for scale loach farming.[目的]寻找泥鳅繁殖的最佳催产剂配比、催产温度及苗种培育开口饵料的最佳选择[方法]通过给泥鳅注射不同的催产药物,在不同的水温下进行人工催产,苗种培育过程中选择不同的开口饵料进行投喂,研究泥鳅繁殖的最佳催产剂配比、催产温度及最佳苗种培育开口饵料.[结果]雌鳅的怀卵量跟性成熟度成正比,即性成熟度越高其怀卵量也越高,成熟系数为24％的雌鱼绝对怀卵量、相对怀卵量分别为62 142和990粒,而成熟系数为9％的雌鱼仅为18 207和367粒.不同的催产药物对泥鳅催产的效果不同,促黄体生成素释放激素类似物（LRH-A2）相对比绒毛膜促性腺激素（HCG）效果好,使用绒毛膜促性腺激素,受精率78.84％,而使用促黄体生成素释放激素类似物（LRH-A2）,受精率为83.04％.将这2种激素按照一定比例（LRH-A25μg/尾,HCG100 IU/尾）使用可提高催产效果,受精率可达89.17％.在一定的温度范围内,温度越高泥鳅的催产效果越好.水温在（30±0.5）℃之间是泥鳅人工催产的最适水温,效应时间6～8 h,催产率为93.33％,受精率为89.26％.用轮虫（以萼花臂尾轮虫、角突臂尾轮虫为主）作为泥鳅仔鱼的开口饵料,其仔鱼成活率最高,成活率为93.3％,其他依次为卤虫幼体、微粒子配合饲料、蛋黄.合理搭配开口饵料能够促进仔鱼的生长,投喂蛋黄＋轮虫的泥鳅仔鱼生长速度明显高于其他单独投喂的3组,投喂蛋黄＋轮虫的鳅苗,其生长速度是单独投喂蛋黄的1.21倍,是单独投喂轮虫的1.04倍,是单独投喂卤虫幼体的1.11倍.[结论]该研究为开展泥鳅的规模化繁殖提供了科学依据.

关 键 词：Misgurnus anguilficaudatus Artificial propagation Larvel rearing Initialfeeding 

分 类 号：S966.4[农业科学—水产养殖]