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海洋牧场是近岸渔业资源保护和恢复的有效途径,为评估海洋牧场建设对岩礁性鱼类的影响,本文基于马鞍列岛海洋牧场建设前后资源调查数据,利用胃含物分析和稳定同位素测试,研究了褐菖鲉的摄食习性.结果表明:海洋牧场建设前褐菖鲉主要摄食端足类、蟹类和头足类,优势饵料生物种类为麦秆虫、日本枪乌贼、日本蟳、日本岩瓷蟹和滩栖阳遂足等.随体长的增大,蟹类的比例增加,而端足类的比例减少.洋牧场建设后褐菖鲉主要摄食蟹类、端足类和鱼类,优势饵料生物种类为双斑蟳、日本蟳、麦秆虫和赤鼻棱鳀等.随体长的增大,鱼类和蟹类的比例增加,而端足类的比例先增加后减少.根据稳定同位素分析结果,海洋牧场区褐菖鲉可以划分为体长<10.0 cm、10.0~13.9.0 cm和≥14.0 cm 3个摄食群体,平均营养级为3.40级.
In order to evaluate the impact of marine pasture construction on the reef fish, based on the data of resource survey before and after the construction of the marine ranch in the Ma’an archipelago, marine pasture is an effective way to protect and recover the nearshore fishery resources. Based on the analysis of the gastric contents and the stable isotope test, The results showed that: Before the construction of the marine pasture, the main species of brown seabream edible end amphibian, crab and cephalopod, the dominant species of bait biomass were wheat straw worm, Japanese calamari, Japanese 蟳, Japanese rock porcelain Crab and beach habitat suffice, etc .. With the increase of body length, the proportion of crabs increased, while the proportion of amphipods decreased.The construction of Western Ranch was the main supply of brown calamus, amphipods and fish, the advantages The species of bait were bream, Japanese buckwheat, wheat stem borer, and red nose rosette, etc. With the increase of body length, the proportion of fish and crabs increased while the proportion of end-feet increased first and then decreased.According to the stable isotope The results showed that the brown calamus in the marine pasture area could be divided into three groups with body length <10.0 cm, 10.0 ~ 13.9.0 cm and ≥14.0 cm, and the average trophic level was 3.40.