| 卵黄囊期鲻鱼仔鱼发育及垂直分布特征研究 |
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| 引用本文： | 詹炜,楼宝,毛国民,陈睿毅,徐冬冬.卵黄囊期鲻鱼仔鱼发育及垂直分布特征研究[J].浙江海洋学院学报(自然科学版),2014(2):125-128. |
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| 作者姓名： | 詹炜 楼宝 毛国民 陈睿毅 徐冬冬 |
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| 作者单位： | 浙江省海洋水产研究所、浙江海洋学院海洋与渔业研究所,浙江舟山316021 |
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| 基金项目： | 浙江省科技计划项目（2012C22047;2013F20001） |
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| 摘 要： | 利用激素注射和人工繁殖技术获得的鲻鱼受精卵,对卵黄囊期仔鱼的发育和水层垂直分布变化进行了观察。结果表明:(1)23℃水温下,初孵仔鱼平均全长2.65±0.18 mm,卵黄球长径0.96±0.24 mm,油球直径0.38±0.12 mm,卵黄球在孵化后第5天消失,油球为第10天完全吸收;(2)不同水深(20、40、60 cm)对鲻鱼的孵化率影响显著(P0.05),但对卵黄囊期仔鱼的死亡率影不显著(P0.05);(3)孵化后的第3天和第8天,仔鱼在水层中发生向下迁移变化,并伴随2个死亡高峰。
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| 关 键 词： | 鲻鱼 仔鱼发育 卵黄囊期仔鱼 垂直分布 |
Study on Larval Development and Vertical Distribution Characteristic of Yolk-sac Larvae of Mugil cephalus |
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| Institution: | ZHAN Wei, LOU Bao, MAO Guo-min, et al (Marine Fisheries Research Institute of Zhejiang, Marine and Fishery Research Institute of Zhejiang Ocean University, Zhoushan 316100, China) |
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| Abstract: | Using injecting exterior hormone into the brood fish of Mugil cephalus and artificial propagat-ing technology to get the fertilized eggs. The larval development and vertical distribution characteristic of yolk-sac larvae were observed. The results showed that：（1） under 23 ℃, the average total length of newly hatched larvae was 2.65 ±0.18 mm, yolk length was 0.96 ±0.24 mm, oil globule diameter was 0.38 ±0.12 mm, yolk was disappeared in the 5th day after hatching, oil globule was completely absorbed in the 10th day after hatching. （2） the hatchability was significantly （P〈0.05）, but the mortality of yolk sac larvae was not significantl（P〉 0.05） in different depths （20, 40, 60 cm）. （3）the yolk-sac larvae had two downward migration in the water accompa-nying death peak in the 3th and 8th day after hatching. |
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| Keywords: | Mugil cephalus larval development yolk-sac larvae vertical distribution |
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