Effect of MS （Methylated Spirit） as a Disinfectant and Antisticking Agent on Hatchability of C/arias gariepinus Eggs and Survival of the Hatchlings
Effect of MS （Methylated Spirit） as a Disinfectant and Antisticking Agent on Hatchability of C/arias gariepinus Eggs and Survival of the Hatchlings作者机构：Department of Water Resources Aquaculture and Fisheries Technology Federal University of Technology Minna Minna 920001Niger State Nigeria
出 版 物：《Journal of Environmental Science and Engineering(A)》 (环境科学与工程（A）)
年 卷 期：2015年第4卷第1期
页 面：30-35页
学科分类：090801[农学-水产养殖] 0908[农学-水产] 0905[农学-畜牧学] 09[农学] 090501[农学-动物遗传育种与繁殖]
主 题：Clarias gariepinus egg MS antisticking.
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.
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