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水温对鲢早期发育的影响
Effects of water temperature on early development of silver carp Hypophthalmichthy molitrix

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唐丽君 1   张筱帆 1   张堂林 1 *   李钟杰 1   刘家寿 1   程庆武 2  
文摘 通过设置温度梯度,对不同水温条件下(17、20、23、26和29℃)鲢胚胎发育的速度、孵化率、存活率和出苗率进行研究,并探讨水温变化与仔鱼生长及畸形率的关系。结果发现,随着水温升高,鲢受精卵的孵化时间明显缩短,发育速度加快。水温变化对孵化率、存活率和出苗率有着显著的影响,17和20℃处理组的存活率和出苗率均显著低于23℃处理组(P<0.05)。但26和29℃处理组的存活率和出苗率与23℃处理组没有显著的差异。试验结束时,最低水温组仔鱼全长显著小于23℃处理组(P<0.01),而与其他3个水温组之间没有显著的差异;各水温组均出现畸形的仔鱼,畸形率与孵化水温没有显著的相关性。综合分析可知:鲢早期发育的最适水温为23~26℃,水温从23℃急剧升高3~6℃不会对人工繁殖生产造成明显的负面影响,但水温从23℃急剧下降3~6℃会对人工繁殖生产造成严重的损失。
其他语种文摘 The effects of different water temperatures(17,20,23,26and 29℃)on the embryonic development speed,hatching,survival and fry production rates of silver carp Hypophthalmichthy molitrix were investigated in this study.Meanwhile,the relationships between both growth and deformity rate of the larvae and water temperature were also analyzed.The embryonic development time decreased and development speed accelerated with the increasing water temperature.The hatching,survival and fry production rates were significantly affected by different water temperatures(ANOVA,P<0.01).The survival and fry production rates at 17and 20℃ were significantly lower than those at 23℃ (P<0.05), whereas were not significantly different at 26and 29℃from those at 23℃ (P<0.01).At the end of this experiment,the averaged total length of the larvae at 17℃ was significantly lower than that at 23℃,but not different from those at 20,26and 29℃.Moreover,the deformity of the larvae occurred in all groups and there was no significant correlation between deformity rate and water temperature.The results indicated that the optimal water temperature for early development of silver carp is 23-26℃,the increase of 3-6℃ would not affect the artificial reproduction of the carp,while a sharp decline of 3-6℃ would cause seriously negative influence on the reproduction of the carp.
来源 华中农业大学学报 ,2014,33(1):92-96 【核心库】
关键词 ; 早期发育 ; 存活率 ; 畸形率 ; 水温
地址

1. 中国科学院水生生物研究所, 武汉, 430072  

2. 武汉市江夏区国营牛山湖渔场, 武汉, 430205

语种 中文
文献类型 研究性论文
ISSN 1000-2421
学科 水产、渔业
基金 公益性行业科研专项 ;  中国长江三峡集团公司科研项目
文献收藏号 CSCD:5034009

参考文献 共 23 共2页

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