舟山沿岸水域曼氏无针乌贼个体繁殖力特性  

Fecundity characteristics of cuttlefish Sepiella maindroni along the coastal waters in Zhoushan

作　　者：刘连为[1,2] 隋宥珍 徐开达[1,2] 徐晓萱 刘姝含[2] 谢慕原 徐汉祥 周永东 LIU Lianwei;SUI Youzhen;XU Kaida;XU Xiaoxuan;LIU Shuhan;XIE Muyuan;XU Hanxiang;ZHOU Yongdong(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, Zhejiang Province Key Laboratory of Mariculture and Enhancement, Zhejiang Marine Fisheries Research Institute, Zhoushan 316021, China;Marine and Fisheries Institute, Zhejiang Ocean University, Zhoushan 316022, China)

机构地区：[1]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实验站,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 [2]浙江海洋大学海洋与渔业研究所,浙江舟山316022

出　　处：《大连海洋大学学报》2022年第3期457-463,共7页Journal of Dalian Ocean University

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

摘　　要：为揭示曼氏无针乌贼Sepiella maindroni的生殖策略,以潜在繁殖力和相对繁殖力为指标,检测其个体繁殖力,并拟合潜在繁殖力与生物学指标的关系。结果表明:舟山沿岸水域曼氏无针乌贼雌、雄个体优势胴长组分别为91~130 mm与81~120 mm,优势体质量组分别为120.1~240.0 g与80.1~180.0 g,雌、雄个体间胴长和体质量均有极显著性差异(P<0.01);雌、雄个体性腺成熟度均以Ⅴ期为主,分别占68.63%和65.35%;Pearson相关性分析显示,性腺成熟系数与缠卵腺指数、精荚复合体指数密切相关(P<0.05);雌性性成熟个体的潜在繁殖力平均值为(1121.01±329.55)cells,胴长和体质量相对繁殖力平均值分别为(9.76±2.43)cells/mm、(5.77±1.28)cells/g,潜在繁殖力与胴长、体质量、缠卵腺质量呈幂函数关系,与缠卵腺长呈对数关系,与卵巢成熟系数呈线性函数关系;雄性性成熟个体的潜在繁殖力平均值为(2769.48±1195.90)条,胴长和体质量相对繁殖力平均值分别为(26.38±11.02)条/mm、(19.82±8.66)条/g,潜在繁殖力与体质量呈指数函数关系,与精荚囊长、精荚复合体质量均呈幂函数关系,与胴长、精巢成熟系数的相关关系不显著。研究表明,经过10多年的增殖放流,舟山沿岸水域曼氏无针乌贼潜在繁殖力及精卵比明显降低,在曼氏无针乌贼规模化养殖过程中应采用合理的亲本投放性比,进而达到合适的潜在精卵比。Individual fecundity including potential fecundity and relative fecundity was investigated in the cuttlefish Sepiella maindroni collected from traps in Mopanyang Sea,Southeast of Liuheng Island,Zhoushan,Zhejiang,April 2021(spawning season)via measurement of mantle length,body weight,gender,gonadal development and weight,gonadosomatic index(GSI),nidamental gland index(NGI),and spermatophoric complex index(SCI).Also,the relationships between potential fecundity(F_(p))and the biological indices were analyzed by using mathematic regression equations in order to indicate the reproductive strategy of the cuttlefish.The results showed that the cuttlefish had dominant mantle length of 91-130 mm and dominant body weight of 120.1-240.0 g in female and dominant mantle length of 81-120 mm and dominant body weight of 80.1-180.0 g in male along the coast waters of Zhoushan,with very significant differences in mantle length and body weight between females and males(P<0.01).The female and male individuals were all primarily at maturity stage ofⅤphase,accounting for 68.63%and 65.35%,respectively,with significant correspondence between GSI and NGI or SCI(P<0.05).Average F_(p) and average relative fecundity by mantle length and body weight of mature female individuals were estimated to be(1121.01±329.55)cells,(9.76±2.43)cells/mm and(5.77±1.28)cells/g,respectively.F_(p) showed a power regression on mantle length,body weight and the nidamental gland weight,and a logarithmic regression on the nidamental gland length as well as a linear regression on GSI of ovary.Average F_(p) and average relative fecundity by mantle length and body weight of male mature individuals were estimated to be(2769.48±1195.90)spermatophores,(26.38±11.02)spermatophores per millimeter,(19.82±8.66)spermatophores per gram.F_(p) showed a exponential regression on body weight,and a power regression on the length and weight of spermatophoric complex,without significant regression of F_(p) on mantle length and GSI in testis(P>0.05).The results indicated that

关 键 词：曼氏无针乌贼 性成熟系数 精荚 潜在繁殖力 相对繁殖力 

分 类 号：S931.1[农业科学—渔业资源]