【摘 要】
：
泥鳅是温水性底层鱼类．具有食用、药用双重价值，是我国主要淡水经济鱼类之一。近年来．由于出口创汇，市场的需求量增大，泥鳅人工集约化养殖迅速发展．随之产生各种细菌性疾病。现将其
【机 构】
：
吉林农业大学动物科技学院,吉林农业大学动物科技学院 130118, 130118
论文部分内容阅读
泥鳅是温水性底层鱼类．具有食用、药用双重价值，是我国主要淡水经济鱼类之一。近年来．由于出口创汇，市场的需求量增大，泥鳅人工集约化养殖迅速发展．随之产生各种细菌性疾病。现将其症状、病因及防治方法综述如下，供广大饲养者参考。１ 赤鳍病１．１ 症状和病因 此病多在
Loach is warm water bottom fish. With food, medicinal double value, is one of China’s major freshwater economic fish. In recent years. Due to export earnings, the market demand increased, artificial cultivation of loach rapid development. A variety of bacterial diseases ensue. Now its symptoms, causes and prevention methods are summarized below, for the majority of feeder reference. 1 red fin disease 1.1 symptoms and causes more than the disease
其他文献
Experiments were conducted repeatedly on Mannari granite under different temperature and confining pressure conditions. Systematic micro- and submicro-structura
一些地质学家报导了他们夹的低档的发现在在 Changpu 的 UHP 变形建筑群以内的变形平板， Yuexi 县，安徽省。他们也建议某忍受 coesite eclogites 是火的静脉，变形平板和其它联系
柔石早期深谙尼采学说,并将其内化于自己的文学创作之中,但由于主流意识形态话语的偏差,柔石在《二月》中表现的个体生命诉求一直被忽略,这形成柔石研究中的一种缺憾。值得注
The multi-peak spectrum of Ti: sapphire pulses observed experimentally under ultra-broad bandwidth conditions ( 【 15 fs pulse length) has been explained theore
Eclogite from the Northern Dabie Mountain is a new finding by the authors. These eclogites in foliated perdotite are enveloped by banded gneiss and occur in the
In situ time-resolved FTIR spectroscopy was used to study the reaction mechanism of partial oxidation of methane (POM) to synthesis gas and the reaction of CH4/
The NiFe/FeMn bilayers with different buffer layers (Ta or Ta/Cu) were prepared by magnetron sputtering. Results show that the exchange coupling field of NiFe/F
美国:据Freedonia市场研究公司最新市场展望(木材与装饰研究)显示,未来4年,热带阔叶木装饰材料的前景非常乐观,即使目前整体装饰需求在住房市场低迷时期有所下降,但热带阔叶
应用经尿道非接触式激光切除前列腺增生３５例，凡能接受膀胱镜检查者均能接受本治疗。激光切除前列腺过程操作简便、治疗时间短、无明显出血及严重并发症．尤其对Ⅰ°～Ⅱ°前列腺增生
中华鲟属于鲟形目、鲟科鱼类,１９８３年被定为国家一类保护动物,是现存世界上最古老的硬骨鱼类之一。为保护与延缓这一古老的自然资源,２０世纪７０年代重庆长寿湖水产研究所最早成功地进行