中国水产科学2018，Vol.25Issue(3)：654-662,9.DOI:10.3724/SP.J.1118.2018.17412
浙北近海曼氏无针乌贼增殖放流效果评估
Effect and assessment of enhancement release of Sepiella maindroni in the northern coastal water of Zhejiang
摘要
Abstract
In order to restore the Sepiella maindroni resources in northern coastal water of Zhejiang Province, the large-scale release had been carried out from 2013 to 2016. A total of 7835×104 ind. fertilized eggs were released, and at the same time, the follow-up monitoring survey were carried out. Considering the certain point information and supplementary sample data, we estimated several indicators including growth equation and death coefficient, built the model of fishery stock assessment, finished the simulation analysis of the variation trend of fishery pro-duction and residual rate. Meanwhile, we introduced the supplementary abilities of breeding population to quanti-tatively evaluate the enhancement effect. The results indicate that, the released Sepiella Maindroni in northern area of Zhejiang Province between year 2013 to 2016, its limited body length is 138 mm, the growth parameters K is 2.354, t0 is –0.05237 a., the total mortality coefficient (Z) is 3.04, the natural mortality coefficient (M) is 1.74, the fishing mortality coefficient (F) is 1.09. Under the current fishing intensity, releasing 1×104 ind. fertilized eggs could receive 137.3 kg production, when still supplement 502 ind. sexually mature individuals into study area. Generally speaking, stock enhancement serves the purpose of population restoration and increases both production and income in certain degree. The model estimation analysis shows: if people could postpone the capture two month, the capture production may add 10.0％, and the growth of the sexually mature individuals will also increase 27.5％. On the other hand, if the fishing mortality coefficient could reduce to 0.76, the production may increase to 155.6 kg/a, and the proportion of sexually mature individuals may add 29.4％. Finally, we hope could put forward the suggestions about improving the effect of releasing Sepiella maindroni and using the resources reasonably according to the research.关键词
曼氏无针乌贼/浙北近海/增殖放流/资源评估Key words
Sepiella Maindroni/northern coastal water of Zhejiang/stock enhancement releasing/stock assess-ment分类
农业科技引用本文复制引用
徐开达,卢占晖,刘连为,周永东,王洋,王伟定,徐汉祥,张洪亮,李鹏飞,梁君,陈峰..浙北近海曼氏无针乌贼增殖放流效果评估[J].中国水产科学,2018,25(3):654-662,9.基金项目
国家自然科学基金青年科学基金项目(31702346) （31702346）
公益性行业(农业)科研专项(20130347) （农业）
浙江省自然科学基金项目(LY17C190006) （LY17C190006）
科技部国际科技合作与交流专项(2015DFR30450) （2015DFR30450）
浙江省科技计划项目(2015F50005, 2016F30018, 2017C32031). （2015F50005, 2016F30018, 2017C32031）
