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喂以高剂量的雄激素对金色罗非鱼性比的影响
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作者 吴汉群 《福建水产》 1988年第4期94-95,共2页
试验于水温27—32℃的条件下用含60、90、120和240mg/kg乙炔基睾酮(ET)的饲料投喂金色罗非鱼(Oreochromis aureus)鱼苗22天,获得了100%雄鱼。喂含60、90和120mg/kg甲基睾酮(MT)的饲料获得了96—99%雄鱼。对金色罗非鱼鱼苗采用偶然... 试验于水温27—32℃的条件下用含60、90、120和240mg/kg乙炔基睾酮(ET)的饲料投喂金色罗非鱼(Oreochromis aureus)鱼苗22天,获得了100%雄鱼。喂含60、90和120mg/kg甲基睾酮(MT)的饲料获得了96—99%雄鱼。对金色罗非鱼鱼苗采用偶然过量的ET或MT并不妨碍单性雄鱼的实际规模生产(建议剂量在300%范围)。 展开更多
关键词 雄激素 金色罗非鱼 性别比例 剂量 性逆转
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Effect of BEDGEN 40 on Growth, Anti-Oxidant Activity and Resistance against Aeromonas Hydrophila Infection in Tilapia (Oreochromis niloticus x O. aureus)
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作者 W. D. Zheng 《Feed & Livestock》 2012年第3期30-33,共4页
The globe artichoke has become important as a medicinal herb in recent years following the discovery of cynarin. This bitter-tasting compound, which is found in the leaves, improves liver and gall bladder function, st... The globe artichoke has become important as a medicinal herb in recent years following the discovery of cynarin. This bitter-tasting compound, which is found in the leaves, improves liver and gall bladder function, stimulates the secretion of digestive juices, especially bile, and lowers blood cholesterol levels. The leaves are anticholesterolemic, antirheumatic, cholagogue, digestive, diuretic, hypoglycaemic and lithontripic. BEDGEN 40 , a compound made with Cynara scolymus L. (artichoke) extract and choline chloride was evaluated for growth performance and anti-oxidant activity in tilapia. There were four treatment groups; group 1 was fed only with a basal diet and served as the control, group 2 - 4 were experimental groups that received 150, 300, or 600 mg/kg BEDGEN 40 , respectively, added to the basal diet and fed for 8 weeks. The results showed signifi- cant differences for weight gain, feed conversion, and protein efficiency in fish diets containing 150, 300, or 600 mg/kg BEDGEN 40 compared to the control. Generally, BEDGEN 40 improved the body condition factor and hepatosomatic index of tilapia, and reduced liver fat content. Fish consum- ing BEDGEN 40 also exhibited improved liver antioxidant status. BEDGEN 40 (300, or 600 mg/kg) was also found to significantly reduce the mortality of tilapia subsequently challenged with Aeromonas hydrophila. 展开更多
关键词 Tilapia (Oreochromis niloticus × O.aureus) BEDGEN 40 cynara extract cholinechloride growth performance anti-oxidant activity disease resistance
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