浙江北部沿岸水域曼氏无针乌贼生物学特性  

Fisheries Biology Characteristics of Sepiella maindroni Along the North Coast Areas of Zhejiang Province

作　　者：隋宥珍 刘连为 张添 徐晓萱 刘姝含 陈峰 徐开达 周永东 SUI Youzhen;LIU Lianwei;ZHANG Tian(Marine and Fisheries Institute of Zhejiang Ocean University,Zhejiang Marine Fisheries Research Institute,Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds,Ministry of Agriculture and Rural Affairs,Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province,Key Laboratory of Mariculture and Enhancement of Zhejiang Province,Zhoushan 316021,China)

机构地区：[1]浙江海洋大学海洋与渔业研究所,浙江省海洋水产研究所,农业农村部重点渔场渔业资源科学观测试验站,浙江省海洋渔业资源可持续利用技术研究重点实验室,浙江省海水增养殖重点实验室,浙江舟山316021

出　　处：《浙江海洋大学学报（自然科学版）》2023年第5期379-384,共6页Journal of Zhejiang Ocean University：Natural Science

基　　金：国家重点研发计划“蓝色粮仓科技创新”重点专项(2019YFD0901204);浙江省重点研发计划(2019C02056);舟山市科技计划项目(2019C31050;2021C31013)。

摘　　要：为准确判定曼氏无针乌贼种群结构,采用频度分析法对2020年与2021年3—11月浙北沿岸水域张网捕获的曼氏无针乌贼胴长、体质量、性腺成熟度和摄食强度的分布进行分析。结果显示,曼氏无针乌贼雌雄个体优势胴长组均为41~120 mm,优势体质量组分布分别为10.1~130.0 g与10.1~90.0 g。3—11月性腺成熟度为Ⅴ期雌性个体平均性腺成熟系数为6.82%~13.75%,性成熟高峰期为3—5月,雄性个体性成熟高峰期为3—4月。统计分析表明,各月间性腺成熟系数除了3—5月间及8—11月间差异不显著外(P>0.05),其余各月间均差异显著(P<0.05)。3—11月雌雄个体胃饱满度3~4级占比范围分别为6.11%~46.30%与3.66%~47.14%。综合分析认为,曼氏无针乌贼在自然海域存在2个种群,其一生命周期为1 a,个体体型较大,可定义为大型群;其二来源于增殖放流,个体体型较小,可定义为小型群。建议在制定曼氏无针乌贼相关渔业管理政策时,应考虑其种群结构特征。In order to identify the population structure of Sepiella maindroni accurately,the distribution of mantle length,body mass,maturity stages as well as the feeding intensity of samples which were captured from trap net along the north coast areas of Zhejiang province were analysed by the frequency distribution method.The results showed that the dominant mantle length of female and male individuals were both 41-120 mm,and the dominant body mass of them were 10.1-130.0 g and 10.1-90.0 g respectively.Average gonadosomatic index(GSI)of female individuals at the maturity stageⅤwere from 6.82%to 13.75%,and theirsexual maturity peak period were from March to May,and that of male individuals were from March to April.Nosignificant differences inGSIwere detected from March to May and August to November(P>0.05),while differences in GSI between other months were significant.The percentage of stomach stage 3 to 4 of female and male individuals from March to November were 6.11%to 46.30%and 3.66%to 47.14%respectively.According to the comprehensive analysis,two populations of S.maindroniare considered to be existed in natural sea area,of which one is defined as large-sized group with a life cycle of one year,and the other one is defined as small-sized group which may be from the group of stock enhancement.Population structure characteristics of S.maindroni should be taken into account as making relevant fisheries management policy.

关 键 词：曼氏无针乌贼 生物学特性 增殖放流 性腺成熟度 

分 类 号：S931.1[农业科学—渔业资源]