南沙美济礁海域隆背笛鲷繁殖和食性的初步研究  

A preliminary study on reproduction and feeding habits of Lutjanus gibbus from Meiji Reef of Nansha

作　　者：王腾 刘永[1,2] 李纯然 李纯厚 唐广隆[1] 肖雅元 林琳 吴鹏[1] WANG Teng;LIU Yong;LI Chunran;LI Chunhou;TANG Guanglong;XIAO Yayuan;LIN Lin;WU Peng(South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization,Ministry of Agriculture and Rural Affairs/Observation and Research Station of Pearl River Estuary Ecosystem,Guangdong Province/Guangdong Provincial Key Laboratory of Fishery Ecology and Environment,Guangzhou 510300,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China)

机构地区：[1]中国水产科学研究院南海水产研究所/农业农村部南海渔业资源开发利用重点实验室/广东珠江口生态系统野外科学观测研究站/广东省渔业生态环境重点实验室,广东广州510300 [2]南方海洋科学与工程广东省实验室(广州),广东广州511458

出　　处：《南方水产科学》2022年第6期78-84,共7页South China Fisheries Science

基　　金：国家重点研发计划项目(2018YFD0900803);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0605);农业农村部财政专项(NFZX2021);中国水产科学研究院基本科研业务费专项资金(2020TD16);中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助(2021SD04,2019TS28);广东省基础与应用基础研究重大项目(2019B030302004-05)。

摘　　要：隆背笛鲷(Lutjanus gibbus)是一种肉质鲜美且经济价值高的珊瑚礁鱼类,其产卵集聚容易造成过度捕捞。以2020年7月在美济礁海域潜水捕捞采集的67尾隆背笛鲷样本为研究对象,研究其性比、性成熟体长、卵径特征、繁殖力和食性等生物学特征,以期为这一珊瑚礁经济鱼类提供保护和管理的基础生物学数据。结果显示,隆背笛鲷雌雄比为2∶1;雌、雄性的50%性成熟体长(L_(50))分别为204.757和201.623 mm;IV期性腺卵径为0.176~0.419 mm(平均0.296 mm);卵径频率分布为单峰型。隆背笛鲷的繁殖力为51858~276205粒(平均139145粒),其繁殖力与体长、体质量成显著的幂函数关系。美济礁隆背笛鲷可摄食蟹、鱼、螺、贝和虾。稳定同位素研究显示隆背笛鲷的平均营养级为3.33,其食性随个体发育转变明显,如生态位变窄和营养级变高等。Lutjanus gibbus,a kind of coral reef fish with delicious meat and high economic value,whose spawning aggregation can easily lead to overfishing.Based on 67 individuals of L.gibbus collected by diving fishing in the waters of Meiji Reef in July 2020,we investigated its basic biological characteristics,including sex ratio,sexual maturity body length,egg diameter characteristics,fecundity and feeding habits,in order to provide basic biological data for the protection and management of L.gibbus.The results show that the ratio of female to male of L.gibbus was 2:1;the 50%sexually mature body lengths of males and females were 204.757 and 201.623 mm,respectively;the egg diameter of Stage IV gonadal was 0.176–0.419 mm with an average of 0.296 mm;the frequency distribution of egg diameter was unimodal.The fecundity of L.gibbus was 51858–276205 eggs with an average of 139145 eggs.Its fecundity had a significant power function relationship with body length and body mass.The preys of L.gibbus from Meiji Reef were crabs,fish,snails,shellfish and shrimps.The stable isotope study shows that the average trophic level of L.gibbus was 3.33,and its feeding habits changed significantly with individual development(The niche width was narrower and the trophic level was higher).

关 键 词：隆背笛鲷 繁殖力 稳定同位素 营养生态位 营养级 珊瑚礁 

分 类 号：S932[农业科学—渔业资源]