摘要
为开展大亚湾黑鲷(Acanthopagrus schlegeli)的增殖和保护,于2018年1月、3月、4月和8—12月共采集了721尾黑鲷样本,研究了大亚湾黑鲷繁殖生物学的周年变化特征。结果表明,1)繁殖期的雌性全长为175~487 mm,均值为(297.92±56.61)mm,体质量为90.96~1 907.12 g,均值为(511.36±307.53)g,雄性全长为110~440 mm,均值为(237.61±61.05)mm,体质量为21.92~1 370.00 g,均值为(277.76±210.33)g,雌性个体全长显著大于雄性个体全长(P<0.001);2)性腺成熟系数和性腺发育表明大亚湾黑鲷繁殖期为11月至翌年3月;3)具有雌雄同体个体存在,表明该物种会发生性逆转,且表现为雄性个体先成熟再向雌性转变;4)50%性成熟雌性全长达到248.52 mm,雄性为148.03 mm;5)卵径频率分布表明黑鲷为分批产卵型鱼类,绝对繁殖力为84 100~2 655 168粒,均值为(728 732±499 547)粒;全长相对繁殖力为380.54~8 271.55粒·mm^-1,均值为(2 731.44±1 630.93)粒·mm^(-1),体质量相对繁殖力为277.58~3 592.83粒·g^-1,均值为(1 443.87±766.82)粒·g^-1,绝对繁殖力与全长、体质量及性腺质量均呈显著线性相关。
We collected 721 individuals of Acanthopagrus schlegeli in Daya Bay in January,March,April,August.December,2018,and then investigated the annual variation of reproductive characteristics of A.schlegeli in Daya Bay so as to provide a theoretical basis for its artificial breeding and conservation.The results show that:1)the spawning period falls between November and March.The total length ranged 175.487 mm for females[averge(297.92±56.61)mm].The body mass ranged 90.96.1 907.12 g for females[average(511.36±307.53)g].The total length ranged 110.440 mm for males[average(237.61±61.05)mm].The body mass ranged 21.92.1 370.00 g for males[average(277.76±210.33)g].The full lengths of females were significantly longer than those of males(P<0.001).2)The gonad maturity coefficient and gonad development indicate that the reproductive period of A.schlegeli in Daya Bay was from November to March.3)The existence of androgynous individuals indicates that the species will undergo sexual reversal,and the males will mature first and then change to females.4)The total lengths(TL)at 50%sex maturity for females and males were 248.52 mm and 148.03 mm,respectively.5)A.schlegeli is a multiple spawner with indeterminate fecundity by oocyte size-frequency distributions.The number of the individual fertility ranged from 84 100 to 2 655 168 granules(average 728 732±499 547).The relative fertility of total length was 380.54-8 271.55 eggs·mm^-1[(2 731.44±1 630.93)egg·mm^-1].The relative fertility of body mass was 277.58-3 592.83 eggs·g^-1[average(1 443.87±766.82)eggs·g^-1].There was a linear correlation among absolute fecundity and total length,body mass and gonadal mass.
作者
陈得仿
王腾
刘永
肖雅元
王九江
李纯厚
CHEN Defang;WANG Teng;LIU Yong;XIAO Yayuan;WANG Jiujiang;LI Chunhou(Guangdong Provincial Key Laboratory of Fishery Ecology and Environment,Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization,Ministry of Agriculture and Rural Affairs,South China Sea Fisheries Research Institute,China Academy of Fishery Sciences,Guangzhou 510300,China;College of Fisheries and Life,Shanghai Ocean University,Shanghai 201306,China;School of Fishery of Zhejiang Ocean University,Zhoushan 316022,China)
出处
《南方水产科学》
CAS
CSCD
北大核心
2019年第5期41-47,共7页
South China Fisheries Science
基金
公益性行业(农业)科研专项经费项目(201403008)
国家重点研发计划项目(2018YFD0900803)
关键词
黑鲷
性逆转
性腺成熟系数
分批产卵
繁殖力
Acanthopagrus schlegeli
sex reversal
gonadosomatic index
spawns in batches
fertility
