| 温度骤降对大黄鱼Larimichthys crocea鱼卵与仔鱼的影响 |
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| 引用本文： | 周孔霖,杜萍,寿鹿,廖一波,刘永叶,黄伟.温度骤降对大黄鱼Larimichthys crocea鱼卵与仔鱼的影响[J].海洋学研究,2018,36(4):68-75. |
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| 作者姓名： | 周孔霖 杜萍 寿鹿 廖一波 刘永叶 黄伟 |
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| 作者单位： | 1.自然资源部 第二海洋研究所,浙江 杭州 310012;2.国家海洋局 海洋生态系统与生物地球化学重点实验室,浙江 杭州 310012;3.环境保护部 核与辐射安全中心, 北京 100082 |
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| 基金项目： | 国家科技重大专项项目资助(2013ZX06002001);海洋公益性行业科研专项项目资助(201505027-4);中央级公益性科研院所基本科研业务费专项资金资助项目资助(JG1713,JG1714,JG1718);国家自然科学基金青年科学基金项目资助(41306112) |
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| 摘 要： | 滨海电厂温排水停止排放以及季节更替、寒潮来袭等现象会引起海水温度降低,从而对鱼类等变温生物产生冷冲击效应。本研究通过模拟水温骤降情形,以孵化率、死亡率、畸形率等为指标,探讨了温度骤降对大黄鱼早期发育阶段(鱼卵和仔鱼)的冷冲击作用。研究发现,大黄鱼仔鱼(3日龄)对温度骤降的敏感性略高于鱼卵。在大黄鱼鱼卵和仔鱼的适温范围内,当水温由22 ℃骤降至19 ℃或16 ℃时,鱼卵的孵化率和死亡率无明显变化,而胚胎发育和仔鱼的生长发育均减缓,仔鱼的死亡率提高;水温超出适温范围,由22 ℃骤降至13 ℃或10 ℃时,对鱼卵和仔鱼造成致命的冷冲击伤害,48 h累积死亡率分别为84.6%~100%和72.1%~98.2%。由此推测:当水温骤降超出适温范围后,大黄鱼的早期发育阶段遭受致命的冷冲击伤害,从而影响种群补充和年龄结构。
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| 关 键 词： | 温度骤降 大黄鱼 鱼卵 仔鱼 电厂温排水 冷冲击 |
| 收稿时间： | 2018-05-13 |
Effects of abrupt temperature drop on the eggs and larvae of Larimichthys crocea |
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| ZHOU Kong-Lin,DU Ping,SHOU Lu,LIAO Yi-Bo,LIU Yong-Ye,HUANG Wei.Effects of abrupt temperature drop on the eggs and larvae of Larimichthys crocea[J].Journal of Marine Sciences,2018,36(4):68-75. |
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| Authors: | ZHOU Kong-Lin DU Ping SHOU Lu LIAO Yi-Bo LIU Yong-Ye HUANG Wei |
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| Affiliation: | 1. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012;2. Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou, 310012;3. Nuclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing, 100082 |
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| Abstract: | Abrupt temperature drop in seawater could be caused by varied thermal effluents from coastal power plants, seasonal change, cold wave, etc., leading to different degrees of cold shock consequences on poikilotherm, like fish. In this study, we mimicked abrupt temperature drop events with several amplitudes to discuss the cold shock consequences on the incubation, mortality, abnormality rates of Larimichthys crocea eggs and larvae. As results, the three days old larvae were more sensitive to abrupt temperature drop than eggs. Within the optimal temperature, when temperatures decreased rapidly from 22 ℃ to 19 ℃ or to 16 ℃, the hatching success and mortality rates of eggs had no obvious change, but the embryonic and larval developments were slower, and the larval mortality rates were accelerated. When temperatures dropped acutely from 22 ℃ to 13 ℃ and 10 ℃, below the lower lethal temperatures, lethal consequences were caused on fish eggs and larvae, with high mortality rates (84.6%-100% and 72.1%-98.2%, respectively). Thus, we speculated that could shock would cause lethal consequences on the early stage of L. crocea and lead adverse impact on stock replacement and age structure of L. crocea when temperature dropped acutely below the lower lethal temperatures. |
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| Keywords: | abrupt temperature drop Larimichthys crocea fish eggs fish larvae thermal effluents cold shock |
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