智利外海茎柔鱼角质颚微结构及其年龄与生长研究  

Beak microstructure and its application in age and growth study of Dosidicus gigas in open sea of Chile

作　　者：刘必林[1,2,3] 刘娜 李建华 张鑫浩[1] LIU Bilin;LIU Na;LI Jianhua;ZHANG Xinhao(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai 201306,China;National Distant-water Fisheries Engineering Research Center/Key Laboratory of Oceanic Fisheries Exploration,Ministry of Agriculture and Rural Affairs/Scientific Observing and Experimental Station of Oceanic Fishery Resources,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]大洋渔业资源可持续开发教育部重点实验室,上海201306 [3]国家远洋渔业工程技术研究中心/农业农村部大洋渔业开发重点实验室/农业农村部大洋渔业资源环境科学观测实验站,上海201306

出　　处：《南方水产科学》2020年第1期62-68,共7页South China Fisheries Science

基　　金：国家重点研发计划(2019YFD0901404);国家自然科学基金面上项目(NSFC41876141);上海市“浦江人才”计划项目(18PJ1404100);上海市高校特聘教授“东方学者”岗位计划项目(0810000243);上海市科技创新行动计划(10DZ1207500)

摘　　要：文章利用2010年4-6月智利外海采集的148尾茎柔鱼(Dosidicus gigas)样品,分析了茎柔鱼角质颚微结构,并对其年龄和生长进行了研究。结果表明,茎柔鱼角质颚上颚喙部截面由头盖和脊突两部分向前延伸组合而成,周期性生长带明显,每条生长带由明、暗两条生长纹组成,头盖与脊突部的生长纹交汇于内轴成"<"形。标记轮与异常结构的形成与个体发育期的特殊事件以及外界的突发事件有关。根据角质颚生长纹估算茎柔鱼日龄,推测茎柔鱼样本孵化日期为2009年3-11月,主要为6-7月;胴长与角质颚日龄呈显著的幂函数关系,其中雌性茎柔鱼胴长的平均瞬时生长率(Instantaneous growth rate,IGR)和绝对生长率(Absolute daily growth rates,AGR)分别为0.14%·d^-1和0.60 mm·d^-1,雄性茎柔鱼胴长的平均IGR和AGR分别为0.11%·d^-1和0.47mm·d^-1。研究结果为柔鱼类年龄鉴定和生长估算提供了新方法,并为中国开展头足类相关研究奠定了基础。In this study,the age and growth of Dosidicus gigas were investigated by analyzing the microstructure of upper beak rostrum sagittal section(RSS),based on 148 specimens collected from the open sea of Chile.The results show that its RSS was composed of hood and crest,where periodic growth bands including one light and one dark increment were distinct.The increments of hood and crest met together at the region of internal rostral axis,showing a pattern of‘<’.The stress marks and aberrant structures might relate to special ontogenetic events or external accident.The back-calculated hatching date was deduced from March to November,mainly from June to July in 2009.The relationship between mantle length(ML)and age can be described as power function.The average IGR(Instantaneous growth rate)and AGR(Absolute daily growth rate)of ML of female D.gigas were 0.14%˙d^-1 and 0.60 mm˙d^-1,respectively,and the average IGR and AGR of ML of males were 0.11%˙d^-1 and 0.47 mm˙d^-1,respectively.The results can provide not only a new method for age and growth study of Ommastrephidae but also important references for Chinese scientists to perform relevant researches.

关 键 词：茎柔鱼 角质颚 生长纹 年龄 生长 标记论 异常结构 智利外海 

分 类 号：S917.4[农业科学—水产科学]