| 湖南沅水下游?繁殖期内繁殖力和卵径的变化研究 |
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| 引用本文： | 黄艳飞,彭林平,陈丽媛,曾慧琳,刘良国.湖南沅水下游?繁殖期内繁殖力和卵径的变化研究[J].水生生物学报,2021,45(1):97-105. |
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| 作者姓名： | 黄艳飞 彭林平 陈丽媛 曾慧琳 刘良国 |
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| 作者单位： | 湖南文理学院生命与环境科学学院;水产高校健康生产湖南省协同创新中心;环洞庭湖水产健康养殖及加工湖南省重点实验室 |
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| 基金项目： | 国家自然科学基金(31572619);湖南文理学院博士启动项目(17BSQD22)资助。 |
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| 摘 要： | 为分析鱼类繁殖期内繁殖力和卵径变化趋势, 研究于4—10月在沅水下游逐月采集180尾?(Hemiculter leucisculus), 分析81尾雌性成熟个体的繁殖力。研究结果表明: ?的性体指数在5、6月最高, 其次在7、8和9月, 在4和10月最低。绝对繁殖力平均值为(30116±19390)粒, 以10000—30000粒为主, 相对繁殖力的平均值为(650±324)粒/g, 以400—800粒/g为主。绝对繁殖力与体长、空壳重呈幂函数关系(P<0.05)。绝对繁殖力和相对繁殖力在5和6月最大, 7、8和9月次之, 在4和10月最小。不同月份成熟卵子的卵径无显著差异, 补充卵子的卵径在5和6月最大, 暗示5和6月分批繁殖次数较多。不同繁殖时期的分批繁殖力、繁殖次数不一样, 对评估种群的繁殖潜能具有重要的指导意义。比较不同水系繁殖力发现, 湖泊种群的个体繁殖力普遍大于河流种群, 沅水种群的个体繁殖力跟湖泊种群的相似, 可能与其具有类似湖泊的缓流水或静水生境有关。研究揭示了?的基本繁殖特征, 为渔业资源管理提供了基础数据资料。
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| 关 键 词： | ? 繁殖力 繁殖期 卵径 洞庭湖 |
| 收稿时间： | 2019-10-08 |
CHARACTERISTICS OF FECUNDITY AND OOCYTE DIAMETER OF HEMICULTER LEUCISCULUS DURING THE SPAWNING SEASON IN THE LOWER REACHES OF THE YUANSHUI RIVER IN HUNAN PROVINCE |
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| HUANG Yan-Fei,PENG Lin-Ping,CHEN Li-Yuan,ZENG Hui-Lin,LIU Liang-Guo.CHARACTERISTICS OF FECUNDITY AND OOCYTE DIAMETER OF HEMICULTER LEUCISCULUS DURING THE SPAWNING SEASON IN THE LOWER REACHES OF THE YUANSHUI RIVER IN HUNAN PROVINCE[J].Acta Hydrobiologica Sinica,2021,45(1):97-105. |
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| Authors: | HUANG Yan-Fei PENG Lin-Ping CHEN Li-Yuan ZENG Hui-Lin LIU Liang-Guo |
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| Affiliation: | (College of Life and Environmental Sciences,Hunan University of Arts and Sciences,Changde 415000,China;Collaborative Innovation Center for Efficient and Health Production of Fisheries in Hunan Province,Changde 415000,China;Key Laboratory of Health Aquaculture and Product Processing in Dongting Lake Area of Hunan Province,Changde 415000,China) |
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| Abstract: | The fecundity of fish and oocyte diameter are two important indicators of the reproductive potential of population.However,little is known about the temporal changes of fecundity and oocyte diameter during the spawning season.A total of 180 Hemiculter leucisculus individuals were collected monthly from April to October in the lower reaches of the Yuanshui River,81 of which were matured female and their fecundity and oocyte diameter were analyzed.The results showed that the Gonadosomatic index(GSI)was the highest in May and June,intermediate in July,August and September,and the lowest in April and October.The average absolute fecundity(AF)was(30116±19390)oocytes,with a peak at 10000—30000 oocytes.The average relative fecundity(RF)was(650±324)eggs/g,with a peak at 400—800 eggs/g.The relationships of AF to standard length(SL)and AF to clear weight(CW)were as follows:AF=0.009SL3.009(r2=0.56)and AF=1392 CW0.833(r2=0.52)respectively.AF and RF were the highest in May and June,intermediate in July,August and September,and the lowest in April and October.The diameter of mature egg was not significantly different among months.The diameter of recruited egg was the largest in May and June,indicating the highest reproductive frequency.The result documented that batch fecundity and reproductive frequency changed with spawning periods,from which larvae make different contributions to population recruitment.Also,the temporal variations of batch fecundity offer important guidance in assessing reproductive potential of population.Fecundity of H.leucisculus showed spatial variations among habitats,and was higher for populations at lakes and reservoirs than in rivers.The fecundity in the Yuanshui River was similar to lakes and reservoirs,and it is a slow-flowing and lenticular habitats.The study revealed reproductive characteristics of H.leucisculus,which provides essential data bases for fishery management of this species. |
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| Keywords: | Hemiculter leucisculus Fecundity Spawning period Egg diameter Dongting Lake |
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