摘要
金带齿颌鲷(Gnathodentex aurolineatus)是南海珊瑚礁鱼类的优势种之一。为研究南海西沙群岛七连屿金带齿颌鲷的生长规律和种群特征,并为深入认识南海珊瑚礁鱼类的种群生物学积累基础数据,分别于2020年9月和2021年9月在南海西沙群岛七连屿附近海域采集金带齿颌鲷共522尾,对其部分生物学特征进行了研究(包括体质量、体长、性成熟度、性比、摄食强度和食性)。结果表明:金带齿颌鲷体质量介于26.64~184.08 g,平均为94.02 g;体长介于101~187 mm,平均为150 mm;2020和2021年的体长和体质量分布均存在极显著差异(p<0.01);体长与体质量关系生长参数b值为2.84;性腺成熟度均以Ⅱ期为主,雌性初次性成熟体长为153.91 mm;2020年9月空胃率很高(40.35%),而2021年9月摄食等级以2、3级为主(54.47%);金带齿颌鲷主要摄食鱼类、腹足类和甲壳类等,相对重要性指数百分比(%IRI)分别为38.29%、24.85%和17.73%,属于无脊椎动物和鱼类食性鱼类,营养级为3.44;不同饵料类群在不同体长组中的比重明显不同,大个体饵料比重随体长的增加而上升,小个体饵料比重随体长的增加而下降。
Gnathodentex aurolineatus is one of the dominant species among coral-reef fishes in the South China Sea.To investigate the growth patterns and population characteristics of G.aurolineatus in the Qilian Islands,and to accumulate fundamental data for a deeper understanding of the population biology of coral reef fishes in the South China Sea,we collected 522 individuals of G.aurolineatus from the waters near the Qilianyu Islands in the Xisha Islands of the South China Sea from September 2020 to September 2021,and investigated some of their biological characteristics(Body mass,standard length,sexual maturity,sex ratio,feeding intensity,and feeding habit).The results show that the body mass of G.aurolineatus ranged from 26.64 to 184.08 g,with an average of 94.02 g,and the standard length ranged from 101 to 187 mm,with an average of 150 mm.There were significant differences in the standard length distribution and body mass distribution between the two years(p<0.01).The growth parameter b of the standard length-body mass relationship was 2.84.Gonadal maturity was mainly at Stage Ⅱ,and the first sexual maturity standard length of females was 153.91 mm.In September 2020,the empty stomach rate was very high(40.35%),while in September 2021,the feeding levels were mainly at grades 2 and 3(54.47% in total).G.aurolineatus primarily fed on fishes,gastropods and crustaceans,with relative importance index percentages(%IRI)of 38.29%,24.85%,and 17.73%,respectively.It was an invertebrate feeder and piscivore species with a trophic level of 3.44.The proportion of different prey categories varied significantly among different standard length groups,with the proportion of larger prey increasing and that of smaller prey decreasing as standard length increased.
作者
龚玉艳
张俊
陈作志
蔡研聪
杨玉滔
GONG Yuyan;ZHANG Jun;CHEN Zuozhi;CAI Yancong;YANG Yutao(South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences/Key Laboratory for Sustainable Utilization of Open-Sea Fishery,Ministry of Agriculture and Rural Affairs,Guangzhou 510300,China;College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China)
出处
《南方水产科学》
北大核心
2025年第5期52-61,共10页
South China Fisheries Science
基金
国家重点研发计划项目(2024YFD2400505)
农业农村部财政专项项目(NFZX2021)
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金资助(2023TD05)
国家自然科学基金青年科学基金项目(31902374)。
关键词
金带齿颌鲷
珊瑚礁鱼类
生物学特征
七连屿
南海
Gnathodentex aurolineatus
Coral reef fish
Biological characteristics
Qilianyu Islands
South China Sea
