文章摘要
胡芬.东海区刺鲳生长、死亡及资源利用状况评价[J].水产学报,2006,30(5):622~668
东海区刺鲳生长、死亡及资源利用状况评价
Growth and mortality of Psenopsis anomala and evaluation on resource utilization in the East China Sea
投稿时间:2008-05-13  修订日期:2008-05-13
DOI:10.3724/SP.J.00001
中文关键词: 刺鲳  生长  死亡  资源利用  评价  东海
英文关键词: Psenopsis anomala  growth  mortality  resources utilization  evaluation  the East China Sea
基金项目:农业部近海渔业资源调查专项
作者单位E-mail
胡芬 中国水产科学研究院东海水产研究所,农业部海洋与河口渔业重点开放实验室 shengfa@public3.sta.net.cn 
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中文摘要:
      利用2001-2005年东海区26°30′~32°30′N,禁渔区线外200水深以浅的东海区大陆架海域底层拖网调查资料和生物学测定资料,利用ELEFAN I软件估算生长参数,拟合von-Bertalanffy生长方程,估算死亡系数,利用Beverton和Holt模型评价资源利用状况。研究结果表明:东海刺鲳的Von Bertalanffy生长方程的生长参数为:L =267.8 mm;K=0.45/a;t0=-0.63 a。从生长速度看其生长过程是变化的,小时生长较快,当叉长达到178.5 mm时生长速度开始下降,此时年龄为1.81 a。利用Pauly公式和詹秉义等推导的M和最大年龄tλ的线性回归方程求得自然死亡系数M=0.81,用FiSAT II软件中的长度变换渔获曲线法、B H模式和用CPUE估算总死亡系数,得到Z=3.87,捕捞死亡系数F=3.06。根据Beverton和Holt的单位补充量等渔获量曲线,现行渔业点即F=3.06,tc=1.10 a位于最适产量区内,表明目前对刺鲳的资源利用较为合理,接近最大产量。保持目前的捕捞强度F=3.06和捕捞规格Lc=145 mm不变,不仅能够保持目前渔获量稳定,而且能够保护刺鲳的资源。刺鲳渔获量稳定且缓慢增长的重要原因在于开捕年龄较为合理,也就是网目尺寸较为合适,这对东海区主要经济鱼类资源的管理和保护具有很大的借鉴作用。
英文摘要:
      Based on survey and biological data of butter fish collected in bottom trawl survey in continental shelf sea area located between north latitude 26.5 and 32.5 degree, outside of forbidden fishing line and up to depth 200 m area in the East China Sea, in the period from 2001 to 2005, growth and mortality parameters were estimated by using ELEFAN I technology based length frequency data, von Bertalanffy growth equation was analogized, and we estimated the resource utilizing status of butter fish by Beverton Holt dynamic pool model. The results indicate that the growth parameters of von Bertalanffy growth equation is L=267.8 mm;K=0.45 /a;t0=-0.63 a. The growth process is not invariable. The growth at the young stage is very rapid. However, the growth rate decreases when a length of about 178.5 mm in fork length is reached. The age of growth inflection point is 1.81 a. Natural mortality coefficient (M) is 0.81 from Paluy equation and Zhan Bingyi linearity regression equation. Total mortality coefficient (Z) is 3.87, got from length converted catch curve with biology data by using the FiSAT,Beverton Holt dynamic pool model and CPUE. The fishing mortality coefficient (F) is equal to 3.06.According to the curve of equal catch using the Beverton Holt model, the present fishery point at F=3.06 and tc=1.10 a locates inside of optimal yield section. The result of assessment indicates that the stock of butter fish has been exploited rationally at present and yield is close to maximum yield. Taking into account economic requirement and feasibility, this paper suggests that keeping the present fishing effort (F=3.06) and the fork length at first capture as 145 mm would get stable yields and protect stock of butter fish. The catch of butter fish kept steady and increased slowly in recent years although the commercial stocks of the East China Seahave been declined because the age of butter fish at the first capture is close to optimal age, i.e. the size of mesh is right to butter fish. So it can be used for reference in the management and protection of the main commercial stocks of the East China Sea.
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