| 摘要: |
| 观察比较了不同盐度梯度海水下双棘黄姑鱼 (Nibea diacanthus)受精卵的孵化率和畸形率,并测定初孵仔鱼不投饵存活系数(Is,a)。结果表明:(1)双棘黄姑鱼受精卵在盐度 15.0～43.0均可孵化,最适盐度为31.0～35.0。盐度高于35.0,孵化率随盐度的升高而降低,仔鱼畸形率则随之升高。盐度低于27.0,孵 化率随盐度的降低而降低,仔鱼畸形率则随之升高。(2)盐度为15.0,19.0,23.0,27.0,30.0～33.0的仔鱼不投饵存活系数为 4.42～7.13;而盐度为35.0,39.0,43.0的仔鱼不投饵存活系数为1.67～4.48,盐度从35.0～39.0是对双棘黄姑鱼仔鱼 Is,a值影响很大的盐度梯度。 |
| 关键词: 双棘黄姑鱼(Nibea diacanthus) 盐度 仔鱼 活力 生长 |
| DOI： |
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| 基金项目:福建省海洋与渔业局资助项目(闽海渔科0122) |
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| The effects of salinity on development of fertilizer eggs and larvae of Nibea diacanthus |
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| Abstract: |
| Hatching rates and deforming rate of fertilizer eggs of Nibea diacanthus are compared and survival activity index(Is,a) of newly hatched larvae are determined under a gradient of different salinities. The results show that fertilizer eggs hatch in a gradient of 15.0 to 43.0 and 31.0 to 35.0 as the optimal range. As the salinity exceeds 35.0, hatching rates decrease and deforming rates of larvae go up with the increase of salinity. When the salinity falls below 27.0, hatching rates decline and larvae’s deforming rates increase with the decrease of salinity. Is,a of larvae is from 4.42 to 7.13 at the salinities 15.0, 19.0, 23.0, 27.0, 30.0 and 32.0 and from 1.67 to 4.48 at 35.0, 39.0 and 43.0. A gradient of 35.0 to 39.0 has the most impact on Is,a of the larvae. |
| Key words: Nibea diacanthus salinity larvae survival activity growth |
