基于耳石不同切面的小黄鱼年龄鉴定及其生长方程年龄反演比较  

Age identification for Larimichthys polyactis based on different sections of sagittal otolith and comparison with result of age backward inferring from growth equation

作　　者：康中杰 宋大德 李纲[1] 严利平[3] 仲霞铭[2] 汤建华[2] 王燕平[2] 吴磊[2] 熊瑛[2] KANG Zhongjie;SONG Dade;LI Gang;YAN Liping;ZHONG Xiaming;TANG Jianhua;WANG Yanping;WU Lei;XIONG Ying(College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;Jiangsu Marine Fisheries Research Institute,Nantong Jiangsu 226007,China;Key and Open Laboratory of Marine and Estuarine Fisheries Resources and Ecology,East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,China)

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]江苏省海洋水产研究所,江苏南通226007 [3]中国水产科学研究院东海水产研究所,农业农村部海洋与河口渔业重点开放实验室,上海200090

出　　处：《海洋渔业》2022年第5期543-554,共12页Marine Fisheries

基　　金：国家自然科学基金(31802297);江苏省自然科学基金(BK20140438);农业农村部专项-东海区海洋渔业资源调查与监测研究专项;江苏省农业农村综合信息统计监测调查。

摘　　要：为探究小黄鱼(Larimichthys polyactis)矢耳石不同切面年龄鉴定和生长方程年龄反演的准确性,选取2018年4月采自黄海南部吕四渔场和2019年9月采自大沙渔场的共45尾小黄鱼进行分析,对小黄鱼矢耳石开展年龄鉴定,并系统归纳国内近30年来的小黄鱼生长方程,同时以其体长为生长参数进行年龄反演。结果显示:以轮纹清晰、年轮直观为最高标准,3个切面的年轮清晰度评分分别为纵切面最低(53.33%)、水平切面居中(66.67%)、横切面最高(73.33%);经酸蚀处理,3个切面的年轮清晰度均有所提高。通过比较纵切面、水平切面、横切面的年龄鉴定结果与19个生长方程的年龄反演结果,3个切面相似度较高的方程为:L_(t)=366[1-e^(-0.11777(t+1.76429))],相似度水平分别为纵切面53.33%、水平切面86.67%、横切面86.67%。以耳石为材料对小黄鱼进行年龄鉴定时,所选矢耳石切面以横切面为最佳、其次为水平切面;针对黄海海域小黄鱼群体,以体长为参数快速反演年龄时宜以生长方程L_(t)=366[1-e^(-0.11777(t+1.76429))]为优选。结果表明,在以鱼类体长或体质量作为参数估算鱼类年龄时,不能任意选择生长方程进行反演,应结合鱼类年龄印证结果择优选择。研究结果可为鱼类年龄鉴定和反演提供较为科学的参考依据。Fish age is a basic parameter in the study of fish population dynamics.Overestimation or underestimation of fish age undoubtedly can lead to overexploitation or waste of the resources.The clarity of the annual ring of otolith section affects the identification of fish age.At present,the accuracy of age inferred from the fish growth equation by fish growth parameters has not been verified.In this paper,small yellow croaker(Larimichthys polyactis),a model species for fishery resources research in marine economic fish,was taken as the research object.To explore the accuracy of age identification by sagittal otolith and age backward inferring by the growth equations for L.polyactis,we collected 45 individuals in the southern Yellow Sea to analyze three otolith sections,including sagittal section,frontal section and transverse section of sagittal otolith.15 individuals were caught in Apr.2018 with stow net of double stakes in Lvsi fishing ground and 30 individuals caught in Sep.2019 with stow net in Dasha fishing ground.Three sections of L.polyactis sagittal otolith were analyzed to compare the effect on age identification as the experimental materials.Simultaneously,the Von Bertalanffy growth equations of L.polyactis during recent 30 years in China were summarized for age backward inferring based on body length of 45 L.polyactis.Taking the clear annual ring pattern and intuitive ring as the highest standard,the results showed that the annual ring clarity was the lowest in sagittal section(53.33%),higher in frontal section(66.67%)and the highest in transverse section(73.33%),respectively.The annual ring of three sections became more distinct after acid etching.L.polyactis sagittal section had the advantage in reflecting the whole life history based on the otolith microchemistry over the frontal section and transverse section because of its large surface area.However,the surrounding area of sagittal section core had many interferential rings,which resulted in misjudging the daily age of larva and juvenile of L.polyacti

关 键 词：小黄鱼 耳石 切面特征 年龄鉴定 年龄反演 

分 类 号：S931[农业科学—渔业资源]