Wang Kai, Li Chao Wen, Wang Zhen Hua, Zhao Jing, Zhang Shou Yu
College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
Institute of Marine Science, Shanghai Ocean University, Shanghai 201306, China.
Ying Yong Sheng Tai Xue Bao. 2017 Jul 18;28(7):2321-2326. doi: 10.13287/j.1001-9332.201707.035.
Marine ranching is considered as an efficient tool to protect and restore the coastal fishe-ries resource. In order to assess the ecological impacts of the construction of marine ranching on rocky fishes, the feeding habits of Sebastiscus marmoratus collected at the marine ranching area off Ma'an Archipelago were studied using stomach contents analyses and stable isotope analyses. Results showed that S. marmoratus mainly preyed on amphipoda, crabs and cephalopods before the construction of marine ranching. The dominant prey species were Caprella sp., Loligo japonica, Charybdis japonica, Petrolisthes japonicas and Amphiura vadicola. Proportion of crabs in the diet of S. marmoratus increased with the increase of fish size, whereas the proportion of amphipoda decreased. After the construction of marine ranching, S. marmoratus fed mainly on crabs, amphipoda, and fishes. The dominant prey species were C. bimaculata, C. japonica, Caprella sp. and Thryssa kammalensis. Proportions of fishes and crabs in the diet of S. marmoratus increased with the increase of fish size, whereas the proportion of amphipoda increased and then decreased. Results of the stable isotope analyses suggested that S. marmoratus populations in the marine ranching area off Ma'an Archipelago could be divided into three feeding groups based on size variations: <10.0 cm BL, 10.0-14.0 cm BL, and ≥14.0 cm BL. The mean trophic level of S. marmoratus was estimated as 3.40.
海洋牧场被认为是保护和恢复沿海渔业资源的有效工具。为了评估海洋牧场建设对岩礁鱼类的生态影响，通过胃内容物分析和稳定同位素分析，对在马鞍列岛附近海洋牧场区域采集的褐菖鲉的食性进行了研究。结果表明，在海洋牧场建设之前，褐菖鲉主要捕食端足类、蟹类和头足类。主要猎物种类为麦氏长手虾、日本枪乌贼、日本蟳、细纹寄居蟹和瓦氏蛇尾。褐菖鲉食物中蟹类的比例随着鱼体大小的增加而增加，而端足类的比例则下降。海洋牧场建设后，褐菖鲉主要以蟹类、端足类和鱼类为食。主要猎物种类为双斑蟳、日本蟳、麦氏长手虾和康氏小公鱼。褐菖鲉食物中鱼类和蟹类的比例随着鱼体大小的增加而增加，而端足类的比例则先增加后下降。稳定同位素分析结果表明，马鞍列岛附近海洋牧场区域的褐菖鲉种群可根据体长变化分为三个摄食组：体长<10.0厘米、体长10.0 - 14.0厘米和体长≥14.0厘米。褐菖鲉的平均营养级估计为3.40。
