春季升温控制对海蜇横裂生殖的影响  

Effect of Different Warming Regimes in Spring on Strobilation and Ephyrae Number of Jellyfish Rhopilema esculentum

作　　者：段妍[1] 孙明[1,2,3] 陈福迪 王一彤 DUAN Yan;SUN Ming;CHEN Fudi;WANG Yitong(Dalian Key Laboratory of Conservation of Fishery Resources,Liaoning Province Key Laboratory of Marine Biological Resources and Ecology,Liaoning Ocean and Fisheries Science Research Institute,Dalian 116023,China;Key Laboratory of Experimental Marine Biology,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]辽宁省海洋水产科学研究院,辽宁省海洋生物资源与生态学重点实验室,大连市渔业资源养护重点实验室,辽宁大连116023 [2]中国科学院海洋研究所,实验海洋生物学重点实验室,山东青岛266071 [3]中国科学院大学,北京100049

出　　处：《水产科学》2023年第1期113-118,共6页Fisheries Science

基　　金：大连市高层次人才创新支持计划项目(2019RQ064);辽宁省农业科学院院长基金项目(2021MS0505);辽宁省“百千万人才工程”资助项目(2016921038);辽宁省兴辽英才项目(XLYC2007068)。

摘　　要：为优化海蜇育苗技术,提高海蜇苗种产量,在室内控制条件下,研究3种升温变化对海蜇螅状体横裂发生时间、重复横裂次数及累计放碟数量的影响,试验持续100 d。T1组为每日升温2℃;T2组为每日升温1℃;T3组为5~10℃每周缓慢升高1℃,10~15℃每4 d缓慢升高1℃,之后每2周升高2℃,并保持水温在19℃。研究结果表明,T1组释放碟状体开始时间是第8天,仅现1次放碟高峰期,高峰期水温为21℃,累计放碟数量平均为771个;T2组放碟开始时间是第13天,仅现1次放碟高峰期,高峰期水温为19~21℃,累计放碟数量平均为1117个;T3组第1次放碟时间是第53天,放碟高峰期水温为14~15℃,第1次累计放碟数量平均为1433个,第2次放碟时间是第74天,放碟高峰期水温为17℃,第2次累计放碟数量平均为1010个,第3次放碟时间是第88天,放碟高峰期水温为19℃,第3次累计放碟数量平均为496个,3次横裂生殖累计放碟数量共计2939个,显著高于其他两组。试验结果表明,不同升温变化对海蜇横裂生殖发生时间、螅状体横裂生殖次数及累计放碟数量均有显著影响。在海蜇育苗生产中,人为控制升温条件既可实时可控地获得海蜇苗种,又可提高海蜇苗种产量。Strobilation is a key stage for polyp-to-jellyfish transition.Knowledge about the strobilation induced factors and the effect of temperature on the time and number of strobilation can help improve jellyfish Rhopilema esculentum artificial breeding,as well as optimize the jellyfish seedling method.The time and number of strobilation in polyps were investigated at 25℃raising by 1℃daily(T1)and 2℃daily(T2)and 1℃weekly for 100 days.The results showed that in the T1 group with increasing 2℃ephyrae were started to release on the 8th day,and the water temperature during the peak period of releasing ephyrae was 21℃,and the cumulative number of ephyrae was 771 on average.In the T2 group with increasing 1℃ephyrae were started to release on the 13th day,and reach their quantitative peak on the 17th day,when the temperature reaches about 19—21℃,and the cumulative number of ephyrae was 1117 on average.There was only one strobilation process in the two groups.In the T3 temperature group,the temperature slowly increased by 1℃every week when the temperature was below 5—10℃,and the temperature increased 1℃every 4 days when the temperature was in 10—15℃,and then the temperature increased 2℃every two weeks,and keep the water temperature at 19℃for all the temperature time.The result showed that the first time for releasing ephyrae was the 53rd day,and the water temperature during the peak period was 14—15℃,and the cumulative number of ephyrae was 1433.In the second strobilation period,the started time for releasing ephyrae was the 74th day,and the water temperature during the peak period was 17℃,and the cumulative number of ephyrae was 1010.In the third strobilation period,the started time for releasing ephyrae was the 88th day.The water temperature during the peak period was 19℃,and the cumulative number of ephyrae was 496.The cumulative number of ephyrae in the T3 group was 2939.These findings suggest that different temperature changes significantly affect strobilation process and the numbe

关 键 词：海蜇 水温控制 螅状体 碟状体 横裂繁殖 

分 类 号：S968.9[农业科学—水产养殖]