| 摘要: |
| 采用自动鱿钓(AJ)和灯光罩网(LAFN)定点采样, 对南沙群岛北部海域(12—16°N, 112—116°E)鸢乌贼生长、繁殖、摄食及资源分布等进行研究。结果表明: 灯光罩网渔获中鸢乌贼的胴长范围为65—231mm, 体质量范围为6—580g; 自动鱿钓鸢乌贼胴长范围为108—215mm, 体质量范围为38—400g。自动鱿钓和灯光罩网鸢乌贼雌雄性比分别为32.0和1.4。南沙鸢乌贼雌性个体出现两个性腺发育高峰期, 即101—120mm与161mm以上胴长组, 4—7月为繁殖高峰期。鸢乌贼以大眼标灯鱼、尖头燕鳐等中上层鱼类为主, 还摄食同类以及钩腕乌贼属等其它头足类及少数蟹类, 雌雄个体摄食强度随胴长增加而增加。自动鱿钓CPUE(单位捕捞努力量渔获量)为1—38pc/(line·h), 平均值为12pc/(line·h); 而灯光罩网CPUE为15—50kg/net, 平均值为35.7kg/net。南沙群岛北部海域鸢乌贼具有重要的经济学和营养生态学研究价值, 灯光罩网是开展南海鸢乌贼渔业资源研究的较佳采样方式。 |
| 关键词: 南沙群岛海域, 鸢乌贼, 渔业生物学, 自动鱿钓, 灯光罩网 |
| DOI：10.11693/hyhz201206021021 |
| 分类号: |
| 基金项目:农业部南海渔业资源调查, 2008专项; 广东省自然科学基金项目, S2012040007813号; 广东省教育厅高校优秀青年创新人才培育项目, LYM09089 号; 广东海洋大学引进人才科研启动项目, 2011 年 |
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| FISHERY BIOLOGY OF PURPLEBACK FLYING SQUID STHENOTEUTHIS OUALANIENSIS IN NORTHERN SEA AREAS AROUND NANSHA ISLANDS IN SUMMER |
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YAN Yun-Rong1,2, FENG Bo1,2, LU Huo-Sheng1,2, LAI Jin-Yang1, DU Shi-Qiang1
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1.College of Fisheries, Guangdong Ocean University;2.Center of South China Sea Fisheries Resources Monitoring and Assessment, Guangdong Ocean University
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| Abstract: |
| Auto jigging (AJ) and light-attraction falling net (LAFN) were used synchronously to investigate the fishery biology of growth, reproduction, feeding habit and distribution of Purpleback flying squid, Sthenoteuthis oualaniensis in northern sea areas (12—16°N, 112—116°E) around Nansha Islands. The Purpleback flying squid mantle length (ML) from 65 to 231mm and body weight varied from 6 to 580g from the LAFN, while ML ranged from 108 to 215mm and body weight extended from 38 to 400g from the AJ. The sex ratio of the above gear samples were 32.0 and 1.4 respectively. There were two peak gonad somatic ML groups of 101 to 120mm and above 160mm. The climax spawning time was from April to July. The Purpleback flying squid mainly fed on pelagic fish such as Symbolophorus boops, Hirundichthys oxycephalus, Decapterus macarellus and Emmelichthys struhsakeri, and preyed on Ommastrephidae cephalopods and some crustaceans. The feeding intensity increased with the growth of the Purpleback flying squid. The catch per unit effort (CPUE) of AJ and LAFN were 1 to 38pc/(line·h) [average 12pc/(line·h)] and 5 to 50kg/net (average 5.7kg/net), respectively. This squid is extremely important in commercial exploitation and marine ecotrophic research in northern sea areas around Nansha Islands. It can be concluded that LAFN is a better survey method in squid investigation. |
| Key words: Nansha Islands sea areas, Sthenoteuthis oualaniensis, Fishery biology, Auto jigging, Light attraction falling net |
