Effect of MS （Methylated Spirit） as a Disinfectant and Antisticking Agent on Hatchability of C/arias gariepinus Eggs and Survival of the Hatchlings  

作　　者：Tsadu Shaba Mohammed Thandime Apollos Garba Ibrahim Saratu Usman Yisa Tswayan Ananias 

机构地区：[1]Department of Water Resources, Aquaculture and Fisheries Technology, Federal University of Technology Minna, Minna 920001,Niger State, Nigeria

出　　处：《Journal of Environmental Science and Engineering(A)》2015年第1期30-35,共6页环境科学与工程（A）

摘　　要：African catfish Clarias gariepinus brood stocks were bred by normal induced breeding method, After fertilization, the eggs were treated with 0.40%, 0.50% and 0.60% concentration levels of MS （methylated spirit） and a control treatment without MS （0%）. The objective was to remove the stickiness of the egg outer vitelline membrane to improve hatchability and survival of the hatchlings. Two batches of the treatments were carried out according to treatment duration of 5 s and l0 s. The eggs hatched normally with the highest hatching percentage of 62.31% in eggs treated with 0.40% MS concentration in 5 s treatment and 61.92% in the same concentration for 10 s. The control treatment of 0.00% MS treatment gave the lowest hatchability of 49.69% at 5 s and 45.71% at 10 s exposure time. Growth performance of the hatchlings improved in eggs treated than those not treated. Those treated had higher weight gain and percentage specific growth rates than those not treated. Percentage survival ranged from 75% to 90 % in both treated and untreated groups. MS can therefore be safely used in fish hatchery to prevent egg stickiness to improve hatchability and larval development.

关 键 词：Clarias gariepinus EGG MS antisticking. 

分 类 号：S965.128[农业科学—水产养殖] S831.3[农业科学—水产科学]