| 浙江南部外海刺鲳资源合理利用的初步研究 |
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| 引用本文： | 王迎宾,俞存根,虞聪达,郑基,宁平,钱浩然.浙江南部外海刺鲳资源合理利用的初步研究[J].浙江水产学院学报,2010(2):114-119. |
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| 作者姓名： | 王迎宾 俞存根 虞聪达 郑基 宁平 钱浩然 |
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| 作者单位： | 浙江海洋学院水产学院,浙江舟山316004 |
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| 基金项目： | 浙江省科技厅资助项目（2005C33055）; 浙江省海洋与渔业局资助项目（05-09）; 国家自然科学青年基金项目（40801225） |
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| 摘 要： | 根据2006年5月-2007年2月在浙江南部外海进行的4个季节底拖网渔业资源调查资料,利用FiSATⅡ软件估算了刺鲳的生长参数,分析了捕捞死亡系数（F）和开捕年龄（t）c的变化对刺鲳单位补充量（Y/R）所产生的影响。应用Beverton-Holt单位补充量渔获量方程估算刺鲳的最适开捕年龄,运用von Bertalanffy生长方程估算最适开捕叉长,结合刺鲳的生长拐点叉长、临界叉长和最小性成熟叉长确定开捕规格,最终对刺鲳资源的合理利用进行了初步探讨。研究结果表明：浙江南部外海刺鲳的生长参数为：L∞=192mm,K=0.69,t0=-0.67。开发率E达到0.8,已属于重度超额开发。根据研究结果,提出开捕规格宜定在150mm,相应年龄为1.5a,同时将F逐步降至2.0左右,此时YW/R为157.1g,比现行渔业产量增加59.5%。
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| 关 键 词： | 浙南外海 刺鲳 开捕规格 合理利用 |
Preliminary Research on the Rational Utilization of Psenopsis anomala in the Offshore Water of South Zhejiang |
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| Institution: | WANG Ying-bin, YU Cun-gen, YU Cong-da, et al (Fishery School of Zhejiang Ocean University, Zhoushan 316004, China) |
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| Abstract: | Based on data collected from bottom trawl fishery survey in the offshore water of south Zhejiang at four seasons during May 2006 and February 2007, the growth parameters of Psenopsis anomala were estimated using FiSATⅡ software and the effects of yield per recruit（Y/R） caused by the variations of fishing mortality coefficient （F） and first capture age （tc） were analyzed. The optimum first capture age was estimated using Beverton-Holt yield per recruit model, and the corresponding optimum first capture length were calculated using von Bertalanffy growth function. Then the first capture standard was made according to the inflexion length, critical length and the minimum sexual mature age beside the optimum first capture length. Finally, the rational utilization of P. anomala resource was discussed preliminarily. Results shows that the growth parameters are L∞=192 mm, K=0.69 and t0=-0.67. The exploitation rate E is 0.8, which indicate the P. anomala resources in this sea area are already serious overexploited. The authors suggest that the first capture standard should be 150 mm, based on the research results, and corresponding age is 1.5 a. The F should be drop to about 2.0gradually, then the YW /R will be 157.1 g, which will increase 59.5% compared with present fishery yield. |
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| Keywords: | offshore water of south Zhejiang Psenopsis anomala first capture standard rational utiliza- tion |
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