| MU Xiuxia,ZHANG Chi,XUE Ying,ZHANG Chongliang,XU Binduo,REN Yiping. 2019. Fishery biology of whitespotted conger Conger myriaster (Brevoort, 1856) in the Yellow Sea and East China Sea. Acta Oceanologica Sinica, 38(6):18－24 |
| Fishery biology of whitespotted conger Conger myriaster (Brevoort, 1856) in the Yellow Sea and East China Sea |
| 东黄海星康吉鳗渔业生物学特性研究 |
| Received:May 25, 2018 |
| DOI：10.1007/s13131-018-1271-8 |
| Key words:Conger myrisater age and growth gonad development stomach contents Yellow Sea and East China Sea |
| 中文关键词: 星康吉鳗 年龄与生长 性腺发育 胃含物 东黄海 |
| 基金项目:The National Natural Science Foundation of China under contract No. 31772852; the Fundamental Research Funds for the Central Universities under contract No. 201562030. |
| Author Name | Affiliation | E-mail | | MU Xiuxia | College of Fisheries, Ocean University of China, Qingdao 266003, China | | | ZHANG Chi | College of Fisheries, Ocean University of China, Qingdao 266003, China | | | XUE Ying | College of Fisheries, Ocean University of China, Qingdao 266003, China | | | ZHANG Chongliang | College of Fisheries, Ocean University of China, Qingdao 266003, China | | | XU Binduo | College of Fisheries, Ocean University of China, Qingdao 266003, China | | | REN Yiping | College of Fisheries, Ocean University of China, Qingdao 266003, China
Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China | renyip@ouc.edu.cn |
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| Abstract: |
| Whitespotted conger Conger myriaster is a commercially important species in the seas around China, Korea and Japan. The coastal waters of China serve as an important feeding ground for congers, but the spatio-temporal variations in the fishery and biological characteristics of the population have been rarely evaluated and less well understood in this area. We studied the growth, spawning and feeding characteristics of C. myriaster on the basis of samples collected from October 2016 to April 2017 in the Yellow Sea and East China Sea. A total of 529 specimens were collected, with ages ranging from 1 to 6 years and total length ranging from 132 mm to 834 mm. The parameters of von Bertalanffy growth equation L∞ and k were 1 026 mm and 0.226 a-1, respectively; the sex ratio was 88:0 (female:male) in the East China Sea and 2.67:1 in the South Yellow Sea; the development stage of ovary ranged from peri-nucleolus stage to secondary yolk globule stage, and the testis of two males was at mid-meiotic stage; Crustacean was the major prey for conger of small length, and food source shift to fish with somatic growth. The results showed substantial differences from previous studies in Japan and Korean waters, as well as from China seas in the 1980s, suggesting potential spatiotemporal changes in the biological characteristics of C. myriaster. This study may improve current understanding of the fishery biology of C. myriaster in the Yellow Sea and East China Sea. |
| 中文摘要: |
| 星康吉鳗（Conger myriaster）是重要的经济鱼类，广泛分布于中国、韩国、日本等国的沿岸海域。中国近岸海域是星康吉鳗重要的索饵场，但此海域中关于星康吉鳗渔业生物学特性的研究鲜有，从而导致目前对中国近海该鱼种生物学特性的了解较少。本文利用2016年10月至2017年4月在东黄海调查采集的星康吉鳗样品的生物学数据，对该群体的年龄、生长、繁殖和摄食习性进行了分析研究。本研究共采集样品529尾，年龄组成范围为1~6龄，全长范围为132~834 mm。采用Von Bertalanffy 生长方程表示其生长特性，生长参数分别为L∞=1026 mm，K=0.226；东海群体的雌雄性比为88：0，黄海南部群体的雌雄性比为2.67：1；研究群体的卵巢发育阶段范围为核仁前期阶段至次级卵黄球阶段，精巢发育阶段为有丝分裂中期；鱼体较小时主要摄食甲壳类，随着鱼体发育主要食物种类向鱼类转变。研究结果显示，该海域中星康吉鳗的生物学特性与日本、韩国海域以及上世纪80年代的中国海域存在一系列差异，推测该鱼种的生物学特性可能发生时空变化。 |
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