| 摘要: |
| 2009～2011年开展了大泷六线鱼规模化人工繁育技术的研究。通过显微观察、测量、拍摄记录大泷六线鱼仔、稚、幼鱼形态发育变化，并对其生长特性、摄食习性等进行了分析。大泷六线鱼初孵仔鱼全长6.18±0.50 mm（n=60）。在水温16.0±0.5℃、盐度31、光照500～1 000lx条件下，大泷六线鱼仔、稚、幼鱼生长呈现先慢后快再慢3个阶段：0～7d生长较为缓慢，3日龄仔鱼卵黄囊尚存，少部分仔鱼开始摄食轮虫；6日龄仔鱼卵黄囊消耗殆尽，开始摄食卤虫无节幼体，进入外源性营养阶段，7d后进入快速生长期；48日龄仔鱼开始进行配合饲料转化，生长速度趋缓，并逐渐稳定。依照TL=aD3+bD2+cD+d的方程式对前80日龄大泷六线鱼的全长与日龄进行回归，构建生长模型：TL(0～80) = -0.0002D3 + 0.0281D2 - 0.155 7D + 7.376（R2 = 0.9939），并根据其生长规律分别构建了0～7d、7～48d和48～80d的生长模型：TL（0～7）= 0.0046D3 -0.0572D2 + 0.3831D + 6.1751（R2 = 0.9971），TL（7～48）= 0.0005D3 -0.0267D2 + 0.931D + 2.269（R2 = 0.997 3），TL（48～80）= -0.0001D3 + 0.0187D2-0.2045D + 24.646（R2 = 0.9998）。 |
| 关键词: 大泷六线鱼 仔、稚、幼鱼 形态发育 生长 |
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| 基金项目:山东省科技发展计划项目“大泷六线鱼规模化繁育技术研究”（2011GHY11502） |
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| Morphological development and growth of larval and juvenile Hexagrammos otakii |
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| Abstract: |
| The post embryonic morphological development of Hexagrammos otakii was observed, measured and recorded by a micro cinematographic system to explore the morphological development characteristics in different stages of larval and juvenile fish. Newly hatched larvae, 6.18±0.50 mm long and depending entirely on the egg contained energy, were nursed at 16.0±0.5℃, salinity 31, illumination 500～1 000 lx. At 3 dph (days post hatching), 7.55±0.27mm in length, with the rudimental yolk sac at abdomen, some larvae started feeding rotifers, and the development entered the exogenous feeding stage. After yolk was exhausted at 6 dph, the larvae started feeding Arternia nauplii. At 48 dph, the larvae started feeding compound feeds. The relationship between total length (TL) and days post hatching (D) for 0~7d，7~48d，and 48~80d fish was described as: TL(0～80) = -0.000 2D3 + 0.028 1D2 -0.155 7D + 7.376（R2 = 0.993 9）; TL（0～7）= 0.004 6D3 -0.057 2D2 + 0.383 1D + 6.175 1（R2 = 0.997 1）; TL（7～48）= 0.000 5D3-0.026 7D2 + 0.931D + 2.269（R2 = 0.997 3）; TL（48～80）= -0.0001D3 + 0.018 7D2-0.204 5D +24.646（R2 = 0.999 8）. |
| Key words: Hexagrammos otakii Larval and juvenile fish Morphological development Growth |
